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LMS News October 2005

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LMS News October 2005 Powered By Docstoc
					                                                      October 2005        LMSNEWS

Mitsubishi develops vehicle platform
with support of LMS


LMS introduces LMS Virtual.Lab Rev 5,
LMS Test.Lab Rev 6 and LMS TecWare 3.1

Plus
Toyota Racing Development plans a winning strategy with LMS Virtual.Lab
Detailed CAE model of gearbox reduces design time at Elasis
Tokai Rubber Industries leverages LMS test and simulation solutions
Autoliv optimizes vehicle safety equipment using LMS testing solutions
| contents |


                                                         Corporate News
                                                  3    Editorial

                                                         Virtual Prototype Simulation
                                                  4    Mitsubishi develops vehicle platform with support of LMS

                                            8     8    Toyota Racing Development deploys LMS Virtual.Lab
                                                       for designing faster and safer vehicles

                                                  1   LMS Virtual.Lab Rev 5 delivers new breakthrough
                                                       applications for fast and realistic simulation

                                                       14 LMS Virtual.Lab Motion Rev 5 – setting new
                                                          standards for multibody simulation

                                                       16 New Rev 5 capabilities for
                                                          LMS Virtual.Lab Acoustics and Noise & Vibration


                                      12               17 New LMS Virtual.Lab Correlation validates simulation models

                                                       17 LMS Virtual.Lab Durability Rev 5 -
                                                          spot weld and seam weld fatigue life


                                                  18   Elasis teams up with LMS Engineering Services to
                                                       accurately predict gear noise in the design phase

                                                         Physical Prototype Testing
                                                     Ricardo selects LMS Test.Lab for global

                                      24          3
                                                       powertrain and vehicle NVH development

                                                       LMS provides Caterpillar Inc. with
                                                       solutions for noise and vibration engineering

 LMS News is distributed free of charge.          4   LMS introduces Rev 6 of LMS Test.Lab
 Send your comments, suggestions
                                                       5 LMS Test.Lab Rotating Machinery Rev 6: 30 to 60% productivity gain
 and story ideas to info@lms.be.
                                                       6 New MIMO Sine Testing accelerates structural testing
 LMS International, LMS Test.Lab,
 LMS Virtual.Lab, LMS FALANCS,                         6 New Modification Prediction allows quick what if studies
 LMS SYSNOISE, LMS DADS,                               7 LMS Test.Lab Environmental Rev 6: new test
 LMS Tec.Manager, LMS CADA-X,                             sequencing automates vibration control testing
 LMS Pimento, LMS PolyMAX,
                                                       8 LMS Test.Lab Pass-By Noise: first solution
 LMS SCADAS III, LMS TecWare, LMS TWR,
                                                          compliant with new ISO362 standard
 LMS Gateway and LMS OPTIMUS are
 registered trademarks of LMS International.           9 LMS Test.Lab builds on ASAM-ODS to increase
 All other trademarks acknowledged.                       noise and vibration data transparency


 Front cover: Mitsubishi Colt CZT Turbo, 150bhp   30   Tokai Rubber Industries leverages LMS test and simulation
 Image: courtesy of David Noels                        solutions to shape its new role of total solution provider

 Other images courtesy of:                        33   CETIM deploys portable LMS Pimento analyzers to
 Autoliv, Cetim, Elasis, LMS International,            support its noise and vibration engineering activities
 Bill Lyons/Alamy, Mitsubishi Motors
 Corporation, David Noels, Adam Opel AG,          34   Autoliv optimizes vehicle safety equipment
 Ricardo, Tokay Rubber Indistries, Toyota              using LMS testing solutions
 Motorsports and Toyota Racing Development.
                                                  37   New LMS TecWare Rev 3.1 substantially
                                                       accelerates load data analysis




|  | LMSNEWS - October 2005
                                                                                                                          | editorial |


Real-life functional performance simulation.
Upfront. Accurate. Fast.
                                                Manufacturers in every industry segment face increasing
                                                competitive challenges that can only be met by producing
                                                a steady stream of attractive products that meet or exceed
                                                customer expectations. Traditional product development
                                                that builds on sequential, iterative stages and that relies
                                                on a test-analyze-and-fix approach is very time consuming.
                                                Most manufacturing companies have made great advances in
                                                adopting an all-digital development environment. Nevertheless,
                                                virtual prototyping technologies often do not deliver the
                                                right answers in time to impact the ongoing design process.
Willy Bakkers,                                  LMS offers reliable solutions that frontload simulation in the
Executive Vice President Marketing &
General Manager CAE Division                    development process and minimize late-stage design iterations.


In view of ever-shorter time to market          LMS Virtual.Lab Rev 5 enables                 LMS Test.Lab Rev 6
and increasing product requirements,            fast and realistic simulation                 continues to set new
future digital development solutions will                                                     productivity standards
include a much greater role for functional      Next to supporting performance
performance engineering in the product          simulation in the early concept               The pressure on shifting product
creation process. Design and engineering        development stage, LMS Virtual.lab            performance optimization to earlier
teams require accurate insight into the         offers extensive capabilities to accurately   stages of the development processes has
real-life performance of complex designs.       simulate the real-world behavior of           been answered by a revolution in virtual
In addition, they have to deliver these         new product designs in the detailed           prototype engineering. But contrary to the
early-on in the development process             engineering phase. With the introduction      misconception that this would eliminate
where 80% of the product costs are locked       of Rev 5, we sharpened the capabilities of    testing from the development process,
in. The LMS NEWS lead story reports on          LMS Virtual.Lab to accurately detect weak     this has resulted in new demands for
our strategic assignment at Mitsubishi          spots, explore multiple design alternatives   testing that are more stringent than ever.
Motors Corporation to co-develop a new          and deliver valuable insight, in time to      Testing is now integrated throughout
small vehicle platform suited to fit multiple   impact major design decisions. LMS            the various phases of the development
upper bodies and to deploy an optimized         Virtual.Lab Rev 5 offers more than 15 new     process, from benchmarking and target
vehicle development process based on            and completed applications for structural     setting, through component model
LMS Virtual.Lab. As a result of the project,    analysis, dynamic motion simulation,          validation, to the establishment of true
Mitsubishi now optimizes designs in the         vehicle ride & handling, interior acoustics   hybrid product models. With Revision 6 of
early concept stage, before detailed CAD        simulation, road noise and durability         LMS Test.Lab we continue to support our
modeling, and performs fewer and faster         analysis. Rev 5 also provides breakthrough    extensive user community in accelerating
iterations during the detailed development      capabilities to automate repetitive           their testing processes and in raising
stage. Thanks to these advances,                simulation tasks and to capture complex       the productivity of their testing facilities.
Mitsubishi compressed the development           simulation processes into easy-to-use         With new modules and over 600 new
cycle and realized a major leap forward in      application templates.                        and enhanced features, Rev 6 aims at
shortening time to market and reducing                                                        supporting engineering teams in gaining
costs of late design changes.                                                                 deeper insights from fewer prototypes
                                                                                              in less time. This enhances the proven
                                                                                              track record of LMS Test.Lab to efficiently
“Future digital development solutions will include                                            detect the best problem fixes and pro-
a much greater role for functional performance                                                actively optimize the noise and vibration
                                                                                              performance of mechanical designs.
engineering in the product creation process”



                                                                                                          LMSNEWS - October 2005    | 3 |
| virtual prototype simulation |


Mitsubishi develops vehicle platform
with support of LMS
Strategic partnership with LMS enables automaker to meet
critical vehicle targets and to accelerate vehicle development cycle

Faster to market with fresh designs of multiple vehicle variants... all while controlling costs,
minimizing weight and delivering cars that meet the highest quality, performance and safety
requirements. To achieve these daunting objectives, Mitsubishi Motors Corporation is working with
LMS in a strategic partnership to frontload vehicle engineering and optimize designs for critical
attributes earlier in the process. LMS recently supported Mitsubishi in reaching these objectives
on a new small-car platform with multiple upper body designs. Mitsubishi also teamed with LMS
to deploy these advanced simulation processes based on LMS Virtual.Lab for the development of
innovative future vehicles.




| 4 | LMSNEWS - October 2005
                                                                                                      | virtual prototype simulation |

Meeting vehicle
development challenges

The concept stage of vehicle development
traditionally focuses on form and fit
factors. But every early design decision
has a significant impact on the intrinsic                                Faster optimization
structural and dynamic properties that
determine the function of the car. The
tremendous importance of getting the                        Improved initial design
design right up front is even magnified
when developing a new vehicle platform
for many different upper body variants.
                                                                                                                                    Confirmation phase
In such case, designers and engineers
must take into account the first vehicle                                                                           Development phase
released in the market as well as make
                                                                                      Concept phase
sure the new platform can accommodate
other body styles with a wide range of
requirements and operating conditions.        Mitsubishi Motors compresses vehicle development by refining the design in the concept phase before
                                              detailed CAD and by performing fewer and faster analysis/test/redesign iterations during development

Mitsubishi Motors and LMS recently
collaborated in a strategic development
program with a two-fold objective: co-        “As a result of the strategic program               shape and sections), an initial platform
develop a new small vehicle platform          with LMS, our development teams can                 design needed to be engineered in detail.
suited to fit multiple upper bodies and       optimize designs in the early concept               At the same time, a first upper body
deploy an optimized vehicle development       stage, before detailed CAD modeling,                concept needed to be studied to provide
process based on the breakthrough             and perform fewer and faster iterations             input for detailed CAD design. The major
simulation capabilities of the LMS            during the detailed development stage.              challenge was in developing a concept
Virtual.Lab platform. The program             Thanks to these advances, Mitsubishi                design for optimal performance in terms
focused on frontloading attribute             compressed the development cycle                    of body rigidity, ride comfort, handling,
engineering in the concept stage and          and realized a major leap forward in                crashworthiness, durability and NVH
on guiding the first detailed design          shortening time to market and lowering              - with very little platform information
of components and subsystems. This            costs,” says Hirotaka Shiozaki, Manager             and no upper body data available.
allowed Mitsubishi to eliminate a series      of the CAE and Digital Engineering Group            To efficiently identify and eliminate
of weak spots and potential problems          at Mitsubishi’s Vehicle Development                 problems in the early conceptual design,
in key attribute areas such as body           Engineering Center in Okazaki, Japan.               Mitsubishi and LMS worked on deploying
rigidity, ride and handling, durability and                                                       specific sub-processes: first, the fast
NVH early in the development process,                                                             creation of finite element models of the
even before the creation of detailed          Frontloading attribute                              platform and upper body variants suited
CAD models. Mitsubishi and LMS also           engineering in the                                  for different attribute studies; second,
implemented a new approach in the             concept stage                                       the generation of accurate loading
detailed design and engineering stage                                                             information for the respective attribute
that allows Mitsubishi engineers to           During the conceptual phase of the                  analyses; and third, the deployment of
simultaneously optimize components            project, four upper body shapes were                efficient approaches to detect weak spots
and sub systems in converging on              developed to fit on a new platform                  and simultaneously assess the impact
the required performance targets in           chassis design. Based on initial styling            of design changes on key attributes.
much less time than is usually taken.         information for the upper bodies (outer
                                                                                                  Since no detailed model information on
                                                                                                  the upper bodies models was available
                                                                                                  for the platform concept development,
                                                                                                  LMS and Mitsubishi engineers created
                                                                                                  simulation models by combining
“Mitsubishi compressed the development cycle and                                                  the finite-element model of the new
realized a major leap forward in shortening time to                                               platform and morphing predecessor FE
market and lowering costs”                                                                        models to fit the new styling lines of
                                                                                                  the different upper bodies. LMS Virtual.
Hirotaka Shiozaki - Mitsubishi Motors Corporation                                                 Lab Morphing and Mesh Based Design
                                                                                                  allowed them to stretch an existing FE




                                                                                                               LMSNEWS - October 2005      | 5 |
| virtual prototype simulation |

mesh to a new target shape. In this                  shimmy, powerplant shake, idle vibration,             to simultaneously deliver the required
way, all four upper body shapes were                 etc. Based on pre-CAD studies, we were                simulation models for the different
developed in only five weeks - a task that           able to avoid these weak points showing               attributes. This allows them to quickly
otherwise would have been impossible                 up in the initial detailed designs.”                  gain insight in the underlying phenomena
since no CAD data was available.                                                                           and easily evaluate design alternatives.
The loads for fatigue life predictions               Detailed Engineering and
were estimated through a combination                 freeze of upper body design                           To complete this process in a few weeks,
of test data from predecessor vehicles                                                                     Mitsubishi performed cross-attribute
and full vehicle multibody simulations               For the detailed development phase,                   optimization using LMS Virtual.Lab
on the suspension. As loading                        a building-block approach was used                    Optimization to evaluate the contribution
conditions for NVH on the other hand,                with the aid of LMS Virtual.Lab to                    of each design variable and the impact
the experimental suspension and                      combine multi-body simulation and FE                  of design modifications on the overall
powertrain interface loads were used.                models representing vehicle attributes                design. “In this way, we can develop
                                                     for all the various components and                    an optimal design that balances all
Subsequently, multi-attribute optimization           subsystems. Loads determined from                     attributes simultaneously,” notes
methodologies were applied to detect                 the conceptual phase were then                        Shiozaki. For example, the optimization
weak spots in the platform and upper                 applied to this full vehicle model                    process enabled engineers to better
body designs using the models obtained               for the analysis of noise, vibration,                 arrive at a refined functional design of
by mesh morphing and the developed                   handling and fatigue life, using detailed             a cowl top, by considering pedestrian
load cases. “These early concept                     simulation to pinpoint and improve                    safety, interior acoustics and handling
analyses allowed us to identify and                  weaknesses in the upper body design.                  simultaneously. Low cowltop stiffness
eliminate weak points in the platform                                                                      was required for pedestrian safety.
design that were common among multiple               At this stage, CAE models would                       Lateral stiffness in the front shock
upper bodies,” explains Shiozaki. “Based             usually have been individually modified               absorber connection point was increased
on the results, the platform concept was             and re-analyzed for each of these                     for optimal handling performance. Modal
frozen and the initial design fixed taking           design fixes. This would probably                     structural modes were balanced against
into account body performances like                  take months for the many iterations                   acoustic cavity modes, to minimize
NVH, acoustics, body-in-white rigidity,              to resolve the often-conflicting                      the engine noise radiated from the
durability, and crashworthiness. Both the            requirements for variables such as                    windshield and the dashboard. “Having
chassis and powertrain mounting layout               vehicle weight versus crashworthiness,                capabilities to simultaneously optimize
concept, and the initial bushings stiffness          or ride comfort versus handling.                      all variables at once saved considerable
values were fixed considering ride and               Through the newly implemented                         time and improved the overall quality
handling performances like harshness,                approach, Mitsubishi engineers are able               of the vehicle design,” says Shiozaki.




                                                                                                                                        New Minivan FEM
                                                                                     New Minivan Styling




                                                                                                                                        New Wagon FEM
                                   Predecessor Minivan FEM

                                                                                     New Wagon Styling

   Initial CAD of floor
                                                                                                                                         New SUV FEM

                                                                                      New SUV Styling


                                    Predecessor Sedan FEM                                                                               New Sedan FEM


                                                                                     New Sedan Styling




In this pilot program, four upper bodies were morphed from predecessor vehicles and fitted to a single chassis using LMS Virtual.Lab.




| 6 | LMSNEWS - October 2005
                                                                                                            | virtual prototype simulation |


                          Connection floor                               D-node                                                             Rear subframe:
                          to wheel housing                                                                                                 front attachment




                                                                                                         Mitsubishi engineers performed a floor unification
                                                                                                         study during the early concept stage. They
A-pillar: connection of                                                                                  identified and eliminated weak points that were
 base pillar, fork area                          Lower part                                              common among multiple upperbodies, before
                                                                                                         initiating the detailed design.




               “Mitsubishi managed to save a full prototype cycle,
               without a single compromise on the final vehicle quality”
               Hirotaka Shiozaki - Mitsubishi Motors Corporation




            Design validation instead of                  the hybrid approach is the extension           gains of more than 50% compared
            late-stage troubleshooting                    of the frequency range from road and           to previous generation processes.
                                                          engine noise, with test data and finite-
            In the confirmation phase, the LMS            element results coupled by FBS. Using          “Using LMS Virtual.Lab and the
            hybrid simulation approach was used           a validated simulation model is a major        multiple breakthrough technologies is
            by Mitsubishi to validate the vehicle         breakthrough advantage over late-stage         revolutionizing vehicle development
            configuration and guide countermeasures       vehicle testing of numerous prototype          at Mitsubishi,” explains Shiozaki.
            to refine functional requirements that        variants, which is an expensive and time-      “Simulation-based development allows
            did not fully meet the targets. LMS           consuming process to find the root cause       us to frontload attribute engineering in
            Virtual.Lab was used to apply forces          of multiple problems and explore design        the concept stage, guide major design
            measured from physical prototype              alternatives to eliminate all trouble spots.   options from a functional engineering
            testing to a simulation model for                                                            perspective and compresses the
            predicting vehicle performance. Any           Productivity improvements                      development cycle significantly. We
            changes can be made to the model and          and future plans                               dramatically reduced the time our
            re-evaluated instead of building and                                                         engineers spend on non-value added
            re-testing multiple prototypes, thus          According to Shiozaki, the deployment          tasks and better utilize their creativity
            eliminating numerous physical tests.          of the new process allowed Mitsubishi          and expertise in developing innovative
            To improve interior acoustics, for            to very effectively meet the critical          car designs that strengthen our
            example, a hybrid model consisting            vehicle targets in terms of body               competitive position in the automotive
            of FEM subframes assembled using              rigidity, ride comfort, handling,              market and will allow us to compete more
            FRF-based substructuring was loaded           crashworthiness, durability and NVH.           effectively in the decades ahead.”
            with test-derived forces to determine         In addition, Mitsubishi managed to
            floor vibration and interior road noise.      save a full prototype cycle, without a
            Guided by these results, Mitsubishi           single compromise on the final vehicle
            and LMS engineers lowered interior            quality. Finally, the implementation of
            sound levels by refining the suspension       LMS Virtual.Lab solutions for Morphing,
            modal alignment with body and                 Noise and Vibration, Structures and
            subframe modes. Another benefit of            Acoustics has lead to efficiency



                                                                                                                      LMSNEWS - October 2005        | 7 |
| virtual prototype simulation |


First to the finish line
Toyota Racing Development deploys LMS Virtual.Lab for designing faster
and safer vehicles and making critical track-side setup decisions


A race may go on for hours and hundreds of miles. But inches and fractions of a second often
decide on the winner. Strict racing regulations generally force engines and body styles to be
very similar. So victory is often determined by subtle differences in chassis and suspension
design, and specific set-ups tuned for the particular racetrack that day. Engineering simulation
plays a critical role in this work at top-level race teams such as Toyota Racing Development.
LMS Virtual.Lab Motion and Optimization are key to their winning strategy. Toyota Racing
Development is partnering with LMS in developing a specialized motorsports simulation package
that will help revolutionize auto racing with vehicles that are faster and safer than ever before.




Toyota’s racing heritage                     inches from one another at speeds over        a competitive edge in two ways: superior
                                             220 mph. Behind all this glamour and          design of the chassis structure, and
Toyota has a long history in motorsports     glory, however, succes is built on the        the best set-ups of vehicle suspension
and has been active in North American        quiet work of race vehicle engineers like     and other systems for each race to
racing circuits since the 1970s. Fans        Skip Essma. He’s with Toyota Racing           account for variabilities in the track,
have witnessed Toyota victories in           Development (TRD), which powers all of        weather conditions, tires and drivers.”
races including the Indianapolis 500,        Toyota’s North American racing programs.
the Daytona 24 Hours, the 12 Hours of        A subsidiary of Toyota Motor Sales, U.S.A.,   According to Essma, TRD focuses on both
Sebring, the Baja 1000, the Grand Am         TRD designs and builds engines and race       these critical areas with LMS simulation
Road Racing Series, National Hot Rod         cars in addition to manufacturing and         solutions. LMS Virtual.Lab Motion
Association races, the Championship          marketing performance aftermarket parts       multi-body simulation software is used
Auto Racing Team (CART) series and           for many Toyota street vehicles. “In the      to model suspension systems as well as
the Pikes Peak Hill Climb where the          past, most vehicle development was based      the full vehicle to predict their dynamic
Toyota Celica still holds the world          solely on seat-of-the-pants intuition and     mechanical performance. LMS Virtual.
record. In 2004, Toyota entered the          extensive physical testing. But to put a      Lab Optimization automatically runs
NASCAR Craftsman Truck Series,               cap on vehicle development expenditures,      through numerous design of experiments
becoming the first manufacturer to be        governing bodies at racing organizations      (DOE) in comparing the impact of
invited into the NASCAR professional         have instituted stringent restrictions on     multiple (and often conflicting) attributes
racing ranks outside of the original         testing,” Essma says. “As a result, much      so engineers can make intelligent trade-
domestic U.S.-based manufacturers.           more simulation is now being performed        off decisions to balance these variables
During this inaugural season in the          by professional racing teams to leverage      and zero in on a refined design. The tight
series, Toyota Tundras visited victory       their technical expertise and background      integration between both applications
lane four times and recorded five pole       in developing winning racecars.”              results in a coupled approach in which
positions as well as 25 top-five finishes.                                                 the optimization routine drives a
                                             A contest of subtleties                       series of multi-body simulations and
Engineers behind the scenes                                                                then displays the DOE results as a
                                             “Because of strict rules to even out the      response surface model (RSM) that
Much of the thrill and excitement of         competition on the track, all vehicles        shows engineers how key parameters
professional racing comes from hearing       within a class are powered by the same        interact and what combination of these
the vehicle engines scream as they go        size engine and have nearly the same          variables constitutes the optimal design.
past the stands and seeing the skill and     body configuration,” he says. “Working
daring of drivers as they maneuver just      within these guidelines, racing teams get


| 8 | LMSNEWS - October 2005
  | virtual prototype simulation |




“LMS Virtual.Lab gives
us a definite competitive
advantage that will
undoubtedly help us
strengthen our standings
in the racing industry in
the years to come”
Skip Essma - Toyota Racing Development




          LMSNEWS - October 2005   | 9 |
| virtual prototype simulation |




The Toyota Tundra is modeled with LMS Virtual.Lab Motion to analyze the        With LMS Virtual.Lab, racing engineers can study vehicle alignment in detail
dynamic behavior of the vehicle, with plots indicating the loads on the four   to determine set-up adjustments such as camber, caster, toe, wheelbase and
tires. Racing engineers use this data to study suspension design and set-up    ride height.
parameters and their effect on vehicle handling and performance.




Driving virtual vehicles                              design changes, and analyze kinematic              “Each optimization study typically
                                                      and dynamic performance. Post-                     investigates perhaps a dozen variables.
Essma explains that to arrive at the best             processing and visualization features are          But sometimes we solve problems
chassis design, TRD models the entire                 used to effectively identify and correct           considering 40 or 50 parameters,” says
vehicle with LMS Virtual.Lab Motion,                  weaknesses in suspension designs.                  Essma. “Without multi-body simulation
including the frame, suspension, steering,            Optimization capabilities manage all the           and optimization technology working
braking system and body. The software                 many racing vehicle variables that come            together automatically, problems of
enables engineers to use multibody                    into play in the multi-body simulations,           this magnitude would not be practical
simulation to accurately predict handling,            and allow engineers to come up with a              to solve manually. The integrated
grip, cornering, balance and laptime.                 refined overall vehicle design. They also          modeling, simulation and optimization
According to Essma, TRD particularly                  provide a tool for crew chiefs to best             capabilities enable us to efficiently
values the powerful capabilities of                   decide track-side setups on race day:              investigate design variants, gain valuable
LMS Virtual.Lab Motion for efficiently                what gears to run, springs, cambers,               insight into vehicle behavior and fully
designing, analyzing and optimizing                   toes, anti-roll bars, roll centers, shocks,        exploit every possible performance
suspension models. Full integration with              anti-dive geometry, tire pressures,                improvement.” Like everyone on the
CAD allows engineers to quickly model                 aerodynamics, cooling, and more.                   racing team, crew chiefs have racing in




                                                                                                         In 2004, Toyota entered the NASCAR Craftsman
                                                                                                         Truck Series, becoming the first manufacturer to
                                                                                                         be invited into the NASCAR professional racing
                                                                                                         ranks outside of the original domestic U.S.-
                                                                                                         based manufacturers.


| 10 | LMSNEWS - October 2005
                                                                                        | virtual prototype simulation |




                                         their blood, years of experience under       series, the insight and background
                                         their belts and tremendous insight into      we obtain with virtual prototyping will
                                         the behavior of the vehicle. “Simulation-    undoubtedly transfer to the Indy cars
                                         based optimization results are a new         and other Toyota racing vehicles.”
                                         important tool that leverages this
                                         expertise and knowledge,” says Essma.        Throughout the implementation process,
                                         “Simulation takes out the guesswork          a team of application engineers from
                                         and installs consistency and objectivity     LMS International has worked closely
                                         into the decision-making process.”           with Essma and his TRD racing vehicle
                                         The goal is faster vehicle speed, of         team. As a part of this work and in a
                                         course. But Essma emphasizes that the        partnership with TRD, LMS is developing
                                         overriding concern in race engineering       a vertical application Motorsports
                                         is safety and that simulation is an          Simulation Package aimed specifically
                                         extremely valuable tool in assessing         at race vehicle engineers. With LMS
                                         crashworthiness, handling and stability.     Virtual.Lab Motion and Optimization
                                         “Engineering simulation will enable us       tightly integrated within the same
                                         to develop the fastest safest racing         package, the software is customized for
                                         vehicles the industry has ever seen.”        the racing industry with a user interface
                                                                                      and powerful capabilities used by teams.
                                         Motorsports simulation                       Capabilities focus on overall suspension
                                         package                                      design and tuning, lap simulation
                                                                                      including optimal paths and track speed,
                                         TRD is currently using LMS Virtual.          aerodynamic forces, traction, tire models,
                                         Lab Motion and Optimization on their         cornering, steering, ride and handling.
“The integrated                          Toyota Tundras that run in the NASCAR        “Combining our years of broad
                                         Craftsman Truck Series. Simulation work      race vehicle experience with the
modeling simulation and
                                         on this series is ramping up quickly and     unmatched capabilities of LMS Virtual.
optimization capabilities                plans are to expand use of the multibody     Lab Motion results in an integrated
of LMS Virtual.Lab enable                and optimization tools in the racing         simulation solution that leverages
                                         program. “The key is that we can use         the skill and passion of our racing
us to exploit every                      virtual prototyping to cover the entire      teams in putting winning vehicles on
possible performance                     process from initial vehicle concept right   the track,” says Essma. “LMS Virtual.
improvement”                             on through to duplicating what crew          Lab gives us a definite competitive
                                         chiefs do to set up the vehicle at the       advantage that will undoubtedly help us
Skip Essma - Toyota Racing Development   track to optimize vehicle performance,”      strengthen our standings in the racing
                                         explains Essma. “Beyond the truck            industry in the years to come.”

                                                                                                LMSNEWS - October 2005   | 11 |
| virtual prototype simulation |


LMS Virtual.Lab Rev 5 delivers new breakthrough
applications for fast and realistic simulation




LMS recently introduced Rev 5 of LMS          “Revision 5 continues to build on the        “LMS Virtual.Lab Rev 5 offers a unique
Virtual.Lab, offering more than 15 new        unique strengths of LMS Virtual.Lab          and very valuable integration of structural
and completed applications for structural     to accurately simulate the real-world        analysis capabilities with multiple
analysis, vehicle ride & handling, interior   behavior of new product designs for          attribute-specific simulation applications.
acoustics simulation, road noise and          mission-critical attributes such as          This truly addresses the users’ need to
durability analysis. With Rev 5, LMS          structural integrity, noise and vibration,   easily exchange models and engineering
Virtual.Lab gets new capabilities to          durability, ride and handling, and system    results between different design and
automate repetitive simulation tasks          dynamics,” commented Willy Bakkers,          engineering groups,” commented Charles
and to capture complex simulation             Vice-President and General Manager           Foundyller, CEO of Daratech, Inc. “We
processes into easy-to-use application        of the LMS CAE Division. “With Rev           are also impressed by LMS Virtual.Lab’s
templates. The new Auto-recursive Solver      5, we sharpened the capabilities of          ability to create accurate insights into
in LMS Virtual.Lab Motion records up          LMS Virtual.Lab to accurately detect         the real-life performance of complex
to 60% time savings in solving complex        weak spots, explore multiple design          designs and deliver these early-on in
simulation models with long series of         alternatives and deliver key insights in     the development process where 80%
linked components and high number of          time to impact major design decisions.”      of the product costs are locked in.”
contact points between components. This
eliminates the calculation bottleneck for
the simulation of the dynamic behavior
of timing chains, belts, tracked vehicles,
complex production machines, etc. To
guarantee realistic simulations with high
fidelity, Rev 5 also introduces a new         “LMS Virtual.Lab Rev 5 offers a unique integration
LMS Virtual.Lab Correlation module that       of structural analysis capabilities with multiple
enables users to validate virtual models
with test results, or alternatively, with     attribute-specific simulation applications”
validated models of similar designs.          Charles Foundyller - CEO of Daratech, Inc.


| 1 | LMSNEWS - October 2005
                                                                                                         | virtual prototype simulation |

Automation and Customization                         New MathData Processor for                       • Support of composite materials
accelerate simulation                                seamless data exchange                             defined on the CATIA V5 geometry
                                                                                                        (import of properties from file
LMS Virtual.lab Rev 5 introduces                     The new MathData Processor in Virtual.             and export to MAT8/PCOMP)
new Automation and Customization                     Lab Rev 5 allows the easy exchange of            • Full support of NASTRAN bulk
capabilities, including scripting and                functional engineering data between                imported composites
journaling features, and integrated                  different attribute domains. With the            • Creation, editing, listing and ID
visual basic programming tools. These                Processor, users can easily convert time           management of composite materials,
capabilities allow Virtual.Lab users                 domain data from a motion simulation               with full access to MAT8/PCOMP cards
to save time by automating repetitive                into frequency domain data for radiated
simulation tasks, to capture complex                 noise prediction, or into rainflow               The advanced spot-weld modeling
processes and best practices into                    data used in durability simulation.              tool supports the easy creation and
easy-to-use application templates, and                                                                management of thousands of spot welds
to integrate Virtual.Lab with in-house               • Eliminate time-consuming                       in complex structures, and the accurate
codes and specialty applications.                      data translation                               prediction of problem areas in terms of
                                                     • Easily convert data between                    structural integrity. This new LMS Virtual.
• Record manual sequences into macros                  different formats: time domain,                Lab Structures tool allows users to:
  to capture frequently recurring tasks                frequency, rainflow, …
• Create macro libraries and insert                  • General signal processing capabilities:        • Efficiently manage thousands
  macro buttons in the LMS Virtual.                    FFT, inverse FFT, PSD, filtering, …              of spot welds and to accurately
  Lab toolbar to make extensive                                                                         detect weak spots
  sequences easily accessible for                    Pre- and postprocessing                          • Automatically insert thousands
  non-expert or occasional users                     for structural analysis                            of spot welds from external
• Execute macros in batch mode                                                                          files or the CAD geometry
  for optimal productivity                           LMS Virtual.Lab Structures extends and           • Include new spot weld
• Drive macros from external                         complements the CATIA V5 Analysis                  representations like BAR-elements,
  applications to integrate LMS                      suite with a fully integrated environment          HEXA-elements, local remeshing,
  Virtual.Lab processes into                         for FEA pre- and post-processing. The              multiple number of sheets
  external batch processes                           new LMS Virtual.Lab solution offers a            • Easily edit spot welds, based
• Create customized applications,                    set of integrated drivers to industry-             on quality images, status
  workflow paths and dialog boxes using              standard solvers such as MSC.Nastran,              overviews and the interactive
  Visual Basic and Virtual.Lab macros                NX Nastran, ANSYS and ABAQUS. Rev                  editing of spot weld locations
                                                     5 of LMS Virtual.Lab Structures also             • Automatically detect spot
                                                     offers dedicated pre- and postprocessing           welds in existing models
                                                     features to analyze designs made of
                                                     composite materials, including the:




The new MathData Processor allows the easy exchange of functional          LMS Virtual.Lab Structures offers a fully integrated environment for FEA
engineering data between different attribute domains (e.g. convert time    pre- and post-processing and a set of integrated drivers to industry-standard
domain data into frequency domain data).                                   solvers.




                                                                                                                  LMSNEWS - October 2005       | 13 |
| virtual prototype simulation |

LMS Virtual.Lab Motion Rev 5 – setting new standards for multibody simulation

LMS Virtual.Lab Motion offers a complete and integrated solution to realistically simulate the dynamics of mechanical systems,
and accurately determine the resulting internal dynamic loads and stresses. With Rev 5, LMS Virtual.Lab Motion gains new
solver capabilities for the simulation of complex mechanical assemblies. Rev 5 of LMS Virtual.lab Motion also offers a completed
application for ride and handling simulation.


New Auto-recursive Solver
records 60% time saving

Rev 5 extends LMS Virtual.Lab Motion with breakthrough
solver technologies and new modeling capabilities to
simulate real-life system dynamics. The new Auto-Recursive
Solver records up to 60% time savings in solving complex
simulation models with long series of linked components and
high number of contact points between components. This
eliminates the calculation bottleneck for the simulation of the
dynamic behavior of timing chains, belts, tracked vehicles,
complex production machines, etc. As a result, LMS Virtual.
Lab Motion allows users to accurately simulate the internal
forces and accelerations of these mechanisms, which are
typically very difficult to measure through prototype tests.

The new Auto-Recursive Solver takes advantage of repeated
bodies connected by revolute, rev-rev, or rev-trans kinematic      The Auto-recursive Motion Solver delivers efficient and accurate motion
constraints. When this topology is present in a model,             simulation of complex mechanisms with long series of bodies and a high
it can be exploited to solve the acceleration terms more           number of contacts.
efficiently compared to a traditional motion solver based
on Cartesian equations. LMS Virtual.Lab Motion offers
a unique implementation of the Auto-Recursive Solver,
since it coexists with the traditional motion solver in a
single, integrated solution. The user herewith benefits
from the performance and accuracy benefits of both
solver solutions combined in a single simulation model.

Complex modeling made easy
with Sub Mechanism solution

The new Sub Mechanisms capability in Virtual.Lab Motion
introduces a building block approach to efficiently model
and simulate complex mechanism models like an engine
valve train or a tracked vehicle. It intelligently avoids the
usage of redundant geometry information when repeated
elements are involved. This makes the resulting simulation
models smaller and more efficient to solve, resulting in
less memory consumption and faster calculation runs.
                                                                   The new Sub Mechanism capability in LMS Virtual.Lab Motion enables to
                                                                   avoid the usage of redundant geometry information when using repeated
• Single mechanism assembly are instanced                          elements.
  multiple times to build the complete model
• Build, test and validate before and after
  combining them into a parent mechanism
• Edits on an individual assembly replicate to
  all its instances in the complete model
• Ability to specify the initial position and degree
                                                                      LMS Virtual.Lab Motion offers a unique
  of freedom velocity for each submechanism                           implementation of the Auto-Recursive
                                                                      Solver, since it supports co-simulation
                                                                      with the traditional motion solver
                                                                      in a single, integrated solution


| 14 | LMSNEWS - October 2005
                                                                                                              | virtual prototype simulation |

Completed solution for
ride and handling

LMS further completed the vertical
application for vehicle Ride and Handling
simulation in Virtual.Lab Motion Rev 5.
The new release integrates standard
handling maneuvers and road profiles
to accelerate the execution of extensive
ride and handling assessments. Rev
5 also adds industry standard tire
models like TNO tires to optimize                    The vertical application for vehicle Ride and Handling simulation has been further completed by the
the accuracy of vehicle handling                     integration of standard handling maneuvers and road profiles.
simulation and other applications
like ride comfort and durability.

The Path Following Driver tool:                      Completed tire model offering                         motorcycle, comfort, fatigue, cornering,
                                                                                                           roll-over, parking etc) and in aircraft
• Allows the creation of a                           LMS Virtual.Lab Rev 5 offers a completed              development (aircraft landing and take-
  vehicle driving path                               set of tire models for accurate and                   off, impact, stability and shimmy).
• Easily replicates standard handling                efficient simulation used in concept
  maneuvers or specific virtual tests                studies, handling, comfort analysis and               Flexible contact adds reality
• Includes speed control                             fatigue prediction. The fully scalable                to motion simulation
• Covers closed and open                             set of tire models starts with an easy-
  loop maneuvers                                     to-use 10-parameter model for basic                   LMS Virtual.Lab Motion Rev 5 adds
                                                     applications and ranges up to most                    a reliable and efficient algorithm
The Road Surface Interface tool:                     complex high-fidelity models for complex              to compute the contact forces and
                                                     simulations. LMS Virtual.Lab integrates               local deformation of a flexible body
• Visualizes the analytical road                     the LMS CDTire solution, the dynamic                  intermittently hitting a rigid sphere.
  surface used by the Motion solver                  tire modeling solution for ride comfort               This allows engineering teams to take
  and provides real-life animation                   an durability simulation. Rev 5 completes             local deformation in contact regions
• Conveniently creates complex                       this offering with the integration of                 into account, and to add another real-
  3D road profiles or surfaces                       the TNO MF-Tire and MF-Swift, the                     life dimension to Motion simulation.
• Delivers an automatic connection                   industry standard tire models for vehicle             Typical applications for this new
  between the animation                              handling simulation. The TNO solution                 functionality include sunroofs, roller
  and the solver data                                complements the existing tire modeling                bearings, telescopic shafts, valves,
• Supports spline curves, spline                     capabilities in Virtual.Lab and offers a full         timing chains, elevators, aircraft
  surfaces and the CDTire format                     application coverage in ground vehicle                wing flap, latch mechanisms, etc.
• Easily imports digitized                           (ride and handling for full vehicle and
  road surface data




                                                         Basic                   Handling               Ride Comfort                   Durability
                                                   LMS Standard Tire

                                                                     TNO Delft MF-Tyre/MF-Swift

                                                                                                                      LMS CDTire

LMS Virtual.Lab now offers a completed set of tire models for accurate and efficient simulation used in concept studies, handling, comfort analysis
and fatigue prediction. With the addition of TNO MF-Tyre / MF-Swift and the integration of LMS CDTire, the overall tire offering now ranges from basic
applications up to the most complex high-fidelity models for simulations.




                                                                                                                       LMSNEWS - October 2005       | 15 |
| virtual prototype simulation |

New Rev 5 capabilities for LMS Virtual.Lab                                   Dedicated solution for vehicle
Acoustics and Noise & Vibration                                              road noise simulation

LMS Virtual.lab Rev 5 offers a completed application support                 Next to interior acoustics, Rev 5 of Virtual.Lab also introduces
for interior acoustics, introduces a new road noise module                   a new module to predict and analyze Vehicle Road Noise in
and new capabilities for random vibro-acoustic simulation.                   different types of driving conditions. Users can easily create
                                                                             dedicated vehicle-level models for road noise simulation
Unique solution to accurately                                                and build realistic load cases for accurate prediction, using
simulate interior acoustics                                                  measured and/or calculated loads. Virtual.Lab allows them
                                                                             to identify the underlying causes of road noise problems and
Rev 5 completes the Interior Acoustics solutions of LMS                      evaluate possible design changes to eliminate them. The new
Virtual.Lab with extended cavity meshing capabilities,                       Vehicle Road Noise solution in LMS Virtual.Lab includes:
new trim modeling tools and the integration of both the
Nastran and the LMS SYSNOISE solver. Rev 5 also adds                         • Inverse load identification for partially correlated sources
specific post-processing tools for path/modal contribution                   • Fast suspension assembly & analysis using reduced models
analysis, hot spot detection and modification prediction.                    • Full-vehicle hybrid (FE-Test) assembly using fast
LMS Virtual.Lab Interior Acoustics offers a unique solution                    FBS (Frequency Based Substructuring) solver:
to accurately simulate the interior sound of a vehicle,                      • Accurate representation of flexible mounts
taking all structural and trimmed body elements into                         • Multi-reference Transfer Path Analysis
account. LMS Virtual.Lab Interior Acoustics Rev 5 offers:                      for better road noise analysis

• Best-of-class cavity meshing capabilities, that                            New Random Vibro-Acoustics solution supports
  automatically create the acoustic FE model form the                        engineering of leight-weight stuctures
  structural FE model or the initial CAD model
• Support of both the Nastran solver and LMS                                 LMS Virtual.Lab Acoustics Rev 5 also gains a new module
  SYSNOISE (including ATV) solver                                            for Random Vibro-Acoustics, which supports the design
• Trim modeling tools (available in Rev 5B) allow                            and engineering of lightweight structures like aircraft
  the assessment of the impact of trim element                               fuselages or satellites that are subjected to random
  on the interior sound of the vehicle                                       acoustic and mechanical loading. The new module allows
• Unique post-processing tools like path/modal                               to analyze the radiated and transmitted sound through
  contribution analysis and hot spot detection allow                         the structure and to minimize the acoustically induced
  to analyze the root cause of noise problems                                damage and fatigue. LMS Virtual.Lab Random Vibro-
• Modification prediction tools support a fast analysis of                   Acoustics offers an integrated solution to simulate:
  design modifications, using modal and/or FRF models
                                                                             • Structural response: vibration amplitudes,
                                                                               internal forces, stresses
                                                                             • Acoustic response: radiated and transmitted
                                                                               sound through the structure
                                                                             • Acoustically-induced damage and fatigue




The Interior Acoustics solutions of LMS Virtual.Lab have been completed      The new Road Noise enables prediction and analysis of Vehicle Road Noise
with extended cavity meshing capabilities, new trim modeling tools and the   in different types of driving conditions.
integration of both the Nastran and the LMS SYSNOISE solver.



| 16 | LMSNEWS - October 2005
                                                                                                       | virtual prototype simulation |




          Rev 5 introduces a new Correlation module that enables
          users to validate virtual models with test results, or
          alternatively, with validated models of similar designs




                                                                             New LMS Virtual.Lab Correlation
                                                                             validates simulation models

                                                                             Rev 5 introduces a new LMS Virtual.Lab Correlation module
                                                                             that enables users to validate virtual models with test results,
                                                                             or alternatively, with validated models of similar designs.
                                                                             LMS Virtual.Lab Correlation helps users in identifying the
                                                                             cause of modeling errors, as to improve simulation models
                                                                             and understand which design parameters have most
                                                                             influence on the structural behavior of their designs.

                                                                             • Compare & validate FE models based on Test data
                                                                             • Guarantee the validity of simulations
                                                                             • Use the available Test modal or Test FRF data
                                                                             • Work in 1 environment integrating Test & FE
                                                                             • Derive the sensitivity of design parameters
                                                                               using Nastran SOL200
Rev 5 introduces a new LMS Virtual.Lab Correlation module that enables
users to validate virtual models with test results, or alternatively, with   LMS Virtual.Lab Durability Rev 5 -
validated models of similar designs.                                         spot weld and seam weld fatigue life

                                                                             To optimize the durability performance of vehicle body and
                                                                             suspension systems within ever-shorter development cycles,
                                                                             LMS Virtual.Lab Durability Rev 5 supports a streamlined
                                                                             process for spot-weld modeling and accurate prediction of
                                                                             the durability-specific impact on spot welds and surrounding
                                                                             material. Rev 5 improved the ease of use in setting up the
                                                                             analysis and therefore reduces risks of human errors, speeds
                                                                             up the preparation of analysis runs, and improves overall
                                                                             accuracy of analysis results. This dedicated process is key
                                                                             for the durability assessment of a vehicle body or suspension
                                                                             system, which typically contain hundreds to thousand of welds.

                                                                             • Capability to automatically insert 1000‘s of spot welds
                                                                               from external files or the original CAD geometry
                                                                             • Supported weld types include BAR-elements,
                                                                               HEXA-elements, local remeshing (2-4 sheets)
                                                                             • Combines an overall efficient spot weld durability
                                                                               prediction technique using the force based approach,
                                                                               with the ability to locally re-model and re-assess the
                                                                               critical locations using the stress based approach
                                                                             • Damage location plot to identify potential failure location on
                                                                               spot welds and seam welds (weld, toe, which side of weld)
                                                                             • Interactive seam weld sketcher provides immediate
                                                                               feedback on what detailed FE seamweld models are used
                                                                             • Compare seam weld cross section to micrographs to see
                                                                               whether the fine model used are still accurately reflecting
LMS Virtual.Lab Durability now offers a streamlined process for spot-weld
modeling and accurate prediction of the durability-specific impact on spot     the reality or if adapted models need to be used
welds and surrounding material.


                                                                                                              LMSNEWS - October 2005   | 17 |
| virtual prototype simulation |


Elasis teams up with LMS Engineering Services to
accurately predict gear noise in the design phase
Hybrid simulation appoach captures root causes of noise generation within
transmission systems

A new dynamic and vibroacoustic prediction method based on a CAE model demonstrated the
possibilities to reduce design time and engineering costs by accurately predicting gear noise
in the design phase. Elasis and LMS Engineering Services worked together to simulate gearbox
noise using a detailed CAE model that simulates noise generation mechanisms at the source and
under varying operating conditions. Experimental testing was used at every phase of the modeling
process in order to validate the CAE model. This approach provides more information on the root
causes of noise problems than prototype testing and makes it possible to develop solutions earlier,
faster and at lower cost.

As automobile manufacturers continue         non-power transmitting gears are free
to substantially reduce engine and road      to move within boundary limits defined
noise, the transmission is becoming          by the tangential clearance between the
much more important as it is less and        teeth of different gears and the radial and
less masked by other sources of noise.       axial clearance between gear and shaft.
Transmission designers must address          These gears impinge upon other gears
noise problems occurring in many             and shafts, resulting in metal-to-metal
different conditions, such as clutch         impacts. These impact forces generate
clunk noise, gear whine, gear rattle and     a wideband vibration frequency content.
driveline boom. Two major gearbox noise      The impacts are driven by engine speed
classes encountered in practice include      fluctuations due to combustion forces.
gear whine and gear rattle.                  Gear whine and rattle sources are
                                             transferred to the shaft bearings, which
Major noise                                  finally excite the transmission housing.
generation mechanisms                        The housing vibrates and acts as a noise
                                             radiator.
Gear whine is a tonal noise that occurs
at orders of the rotational engine speed     Move from
that correspond to the number of teeth       build-and-test to CAE
in the different gear pairs. The number
of teeth in contact can vary through         Today, transmission manufacturers
each revolution, with two teeth being in     typically address these problems by
contact at one point in time and three       spending considerable time and energy
at another, for example. In addition,        during the prototype testing phase. They
the point of contact on a given gear         evaluate transmission noises that occur
pair continually moves along the face        when gears are being shifted, as the
of the teeth. One can view each tooth        engine is accelerated in various gears
as a beam that is clamped at its root.       and while idling. The problem with this
The bending stiffness of these beams         approach is that it is very expensive and     Elasis and LMS developed
changes as the contact point moves           time-consuming to build prototypes,           an approach that combines
along this beam. For one given tooth, it     perform physical testing and then modify
rises as the contact point moves towards     the prototypes in an effort to solve the      multibody simulation
the root diameter and falls as the contact   possible issues. Another problem is that      and acoustic analysis to
point moves towards the outer diameter.      the amount of information provided by         capture the root causes
This phenomenon accounts for additional      physical testing is limited by the number
stiffness variation as a function of time.   and accuracy of sensors that can be used      of noise generation
Gear rattle results from the fact that       to instrument the transmission.               within the transmission

| 18 | LMSNEWS - October 2005
| virtual prototype simulation |




     LMSNEWS - October 2005   | 19 |
| virtual prototype simulation |




Dedicated test rigs with virtual engine simulators enable engineers to evaluate the acoustic performance of manual gearboxes.




For these reasons, Elasis started to                 experimentally, for example by means
evaluate and understand gearbox noise                of Transfer Path Analysis (TPA). The
in the design stage, before prototypes               combination of test and simulation
become available. The aim is to be                   is also used to identify weaknesses
able to assess the noise and vibration               in the housing and suggest effective
performance of the transmission in the               corrections, such as adding ribs and
early design stages, to optimize the                 changing wall thickness.
design while reducing or eliminating
the need for troubleshooting during the              The input forces for this method can be
prototype phase. An approach Elasis                  identified on the basis of the current
and LMS successfully introduced is the               gearbox design, if available for testing,
analysis of the transmission housing,                or with realistic forces defined from
analyzing the way the transmission                   experience with similar gearbox types.
housing vibrates and radiates noise under            This approach is appropriate when the
known forces at the bearings, and how                noise problem is related to gearbox
this noise is transmitted to the vehicle             housing resonances, which amplify
interior. The transmission housing was               the internal forces generated at the
modeled using Finite-Element (FE) and                bearings. However, since this problem is
Boundary-Element (BE) models, and the                mainly caused by high excitation forces,
forces at the bearings were identified               structural modifications made to the




The first step involved the creation of a dynamic
motion model of the internal transmission
mechanism using Finite-Element (FE) modeling.




| 0 | LMSNEWS - October 2005
                                                                                               | virtual prototype simulation |



housing may be insufficient and another      stiffness at the contact of each pair of       The input to the multibody simulation
approach must be used.                       teeth was considered, as the focus was         were the combustion pulsations
                                             mainly on gear rattle and the stiffness        represented by the engine speed
Eliminating noise at its source              fluctuations due to the moving contact         fluctuations, and the resistance torque
                                             between teeth were neglected. When             as seen by the transmission, which
Elasis is a Fiat-owned engineering           the focus is on gear whine, it is possible     represents the vehicle load. The
company, which works mainly for Fiat         to extend the procedure. One can, for          multibody simulation was carried out
Auto and on the Fiat-GM Powertrain joint     instance, use an analytical relationship       in fifth gear, by inputting the rotational
venture (FGP), carrying out research         that provides the stiffness of the tooth       speed on the flywheel while applying a
and development on vehicles and              contact as a function of the parameters        resistance torque at the output shaft.
powertrains. In the current project,         related to the contact location. The next      The gearbox housing acted as the
LMS and Elasis set out to go beyond          step is building a BE model of the housing     noise radiator. As it was simulated as
this method by analyzing the sources         using LMS acoustic simulation software,        a flexible component characterized by
of the noise in a new transmission in        in order to predict the noise radiated         the modes of an FE model, the modal
detail. The challenge was modeling the       under the simulated conditions.                participation factors as a function of time
full complexity of the internal operation                                                   were computed during the multibody
of the transmission to the level of detail   Validating the accuracy                        simulation. They were transferred to
required to accurately predict internal      of the model                                   the frequency domain and applied to
dynamic forces in the wide frequency                                                        the vibroacoustic model of the gearbox,
range that is associated to gear rattle.     The NVH department of Elasis has built         which yielded the noise radiation
                                             a state-of-the-art test rig to evaluate        prediction.
LMS engineering specialists developed        manual gearboxes. It is a Virtual Engine
an approach that combines multibody          Simulator (VES) that offers the ability to     This method will enable Elasis to make
simulation and BE analysis to capture        reproduce speed and torque fluctuations        better design decisions in the early
the root causes of noise generation          up to 500 Hz, which are similar to             phases of the development when
within the transmission. The first step      those generated by a physical internal         prototype results are not available. It
was using LMS multibody software             combustion engine. This eliminates the         will also become possible to obtain
to create a dynamic model of the             need to have a real engine and ensures         far more detailed information on the
internal transmission mechanism              that the gearbox is the sole source of         performance of proposed designs and
that incorporates gear stiffness, gear       the recorded noise, enabling an in-depth       evaluate alternate decisions faster and
backlash, bearing characteristics, and       study of gear rattle noise and eliminating     less expensive, when compared to the
hub and sleeve connection properties.        the mask effects of engine noise. One          build and test method. As these new
The flexibility of components, such as       important insight gained during the            simulation methods are further refined
shaft and housing, was represented by        project is that velocity fluctuations at the   and used more widely within Elasis, they
using modal parameters obtained from         engine shaft primarily increase gear rattle    yield substantial improvements of the
FE models. In the project, a constant        at low rotational speed.                       transmission design process.




                                                                                            In a second step, simulations on a vibro-acoustic
                                                                                            Boundary-Element (BE) model was developed to
                                                                                            predict of the radiated gearbox noise.




                                                                                                        LMSNEWS - October 2005       | 1 |
| physical prototype testing |


Ricardo selects LMS Test.Lab for global
powertrain and vehicle NVH development




                                                                                    “LMS Test.Lab enables us to
                                                                                    accelerate data acquisition
                                                                                    and to validate test results,
                                                                                    all within the limited time
                                                                                    frame prototypes are
                                                                                    available”
                                                                                    Jason March,
                                                                                    global NVH manager, Ricardo plc



Leading automotive technology and           transfer path analysis or full vehicle        the acquired data and change the test
engineering services provider, Ricardo      tests. To improve the effectiveness and       strategy if needed, during the process of
plc, selected LMS Test.Lab as its new       efficiency of its NVH operations, Ricardo     testing. Further advantages of LMS Test.
standard environment for noise and          has decided to standardize its worldwide      Lab also utilised by Ricardo’s engineers
vibration testing and engineering. The      NVH testing systems on LMS Test.Lab           include the software’s advanced analysis,
company is deploying over 20 LMS Test.      software suites and LMS SCADAS III data       reporting and data sharing tools. These
Lab systems for powertrain and full-        acquisition front-ends. The scalability       are essential in analyzing the different
vehicle NVH engineering at its technical    and modularity of the test systems allow      sources and complex transfer paths that
centres throughout Europe and the USA.      Ricardo engineers to transport them to        shape the vibration comfort and sound
As part of Ricardo’s wide-range advanced    customer test facilities and adapt them       quality of a vehicle. Jason March, Global
engineering activities, the company         according to the requested programme          NVH Manager at Ricardo plc, sees the
provides high-level NVH engineering         and individual test requirements. The         selection of LMS Test.Lab as a logical
services drawing upon its extensive         company’s engineers report efficiency         step for the company, “To sustain our
experience in developing and refining       increases through LMS Test.Lab’s              leading position in NVH engineering and
complete vehicles and individual vehicle    intuitive user interface and integration      to maximize the return of our testing
subsystems. With the world’s automakers     of key NVH applications. The embedded         facilities, we are constantly challenged
demanding ever shorter development          process-centric approach enables              to push the efficiency and capability
timescales, Ricardo recognises the          them to consistently and systematically       limits of our operations. Through the
need to increase the efficiency of its      capture all the sequential steps of routine   successful implementation of tools such
NVH testing operations. The company’s       NVH testing assignments, resulting            as LMS Test.Lab, our engineers are able
engineers must have confidence in the       in shorter test cycles and higher data        to accelerate data acquisition and to
validity and accuracy of testing, whether   consistency. The software also allows         validate test results, all within the limited
executing powertrain measurements,          engineers to evaluate the quality of          time frame in which prototypes become
                                                                                          available.”

|  | LMSNEWS - October 2005
                                                                                                 | physical prototype testing |


LMS provides
On the Move Caterpillar Inc. with
in Europe for noise and vibration engineering
solutions
with Visteon’s
Transportable
NVH Test
Facility
LMS Test.Lab Accelerates
Benchmarking,
Prototype Refinement and
Production Tests

Over the past decade,
automotive OEMs increasingly
count on automotive
suppliers to participate
in the development of
vehicles and subsystems in
order to meet stricter NVH
performance standards.


                                             LMS is recognized at Caterpillar for its strong know how and
                                             complete offering for noise and vibration engineering



LMS provided Caterpillar with LMS Virtual.   products and to pro-actively respond to         prototypes in the late development stages.
Lab and LMS Test.Lab for Noise and           changing customer requirements and              Using
Vibration engineering. The LMS solutions     ever-stricter legislation. The LMS Test.        LMS Virtual.Lab Noise and Vibration,
are used to optimize the vibration comfort   Lab system strongly supports engineering        engineering teams analyze the correlation
and noise performance of new designs,        teams in tackling these complex                 between Finite Element (FE) models and
from the early virtual prototype stages      challenges. LMS Test.Lab combines state-        test models, and improve the accuracy
up to the final prototype validation.        of-the-art capabilities, strong ease of use     of FE models. In addition, LMS Virtual.
LMS is recognized at Caterpillar for its     and a complete coverage of key noise            Lab Noise and Vibration assists them
strong know how and complete offering        and vibration applications. This strongly       in building hybrid simulation models,
for noise and vibration engineering, the     increases the efficiency in pinpointing         combining FE models and test-derived
proven productivity of its solutions, and    and correcting vibration problems, and          models of components and subsystems.
the flexibility of the LMS SCADAS III        in analyzing and optimizing the dynamic         Overall, LMS Virtual.Lab Noise and
data acquisition platform. Competitive       properties of designs. In off-highway           Vibration supports the accurate simulation
pressure continuously forces off-highway     engineering, the role of noise and              and efficient optimization of a design’s
manufacturing companies to optimize the      vibration testing is no longer limited to the   noise and vibration performance before
noise and vibration performance of their     qualification and optimization of physical      committing to virtual prototype testing.



                                                                                                      LMSNEWS - October 2005   | 3 |
| physical prototype testing |


LMS Introduces Rev 6 of LMS Test.Lab
New release increases overall testing productivity with 30 to 60% and
delivers better engineering insights in shorter time

The pressure in noise and vibration engineering is rising at a rapid pace. Customers
demand better, more refined products. Legislation dictates ever-tougher noise and vibration
requirements. With new applications, plus over 600 new and enhanced features, Rev 6 aims
at supporting engineering teams in gaining deeper insights from fewer prototypes in less
time. This enhances the proven track record of LMS Test.Lab to efficiently detect the best
problem fixes and pro-actively optimize the NVH performance of mechanical designs.




| 4 | LMSNEWS - October 2005
                                                                                                         | physical prototype testing |




Highlights of LMS Test.Lab Rev 6
• Unique Real-time Signature - 30 to 60% time reduction of key testing procedures
• MIMO Sine Excitation - High-quality vibro-acoustic models in less time
• Structural Modification Prediction - Quick what-if studies to find the best design fix
• Test Sequencing - Fail-safe execution of unattended batch testing
• Pass-By Noise Testing - First solution compliant with new ISO362 standard
• ASAM-ODS integration increases data transparancy




        LMS Test.Lab Rotating                          averaged spectra, cross-spectra,             • In a fast (< 10 sec.) online run-up,
        Machinery Rev 6:                               FRF’s, etc. The new Test.lab capability        LMS Test.lab tripled the number
        30 to 60% productivity gain                    eliminates hours of post-processing            of spectra per waterfall to over
                                                       in off-line mode and allows the test           1000, using a refined rpm increment
        With its new architecture for rotating         team to make their first engineering           parameter. This allowed the
        machinery testing, LMS Test.Lab Rev            assessments on the spot. As a net              testing team to better pinpoint the
        6 reduces the total elapsed time for           result, they can decide immediately after      critical rpm/load combinations.
        data acquisition, analysis and reporting       the test if additional measurements or       • LMS Test.Lab increased the number
        with over 30% compared to LMS Test.            modified test programs are required.           of simultaneous channels to over
        Lab Rev 5 and with over 60% compared                                                          150 for an already challenging set
        to previous generation test systems.           Throughout extensive customer                  of acquisition parameters, . In this
        In addition to these time gains, LMS           benchmarks, LMS Test.Lab Rev 6 has             scenario, Test.lab managed to merge
        Test.Lab covers ever more demanding            proven its capability to reduce the            a series of previously sequential
        test scenarios. LMS Test.Lab Rev 6             overall elapsed time while extending           tests into a single setup and to
        delivers smooth real-time measurement          the coverage of the signature and              maximize the overall consistency of
        capabilities and consumes less                 order analysis test setups. In addition,       the analysis data by expanding the
        memory and CPU time. This allows               LMS Test.Lab was able to execute test          selection of online analysis functions.
        Test.Lab to push the barriers for key          scenarios that were unachievable up
        acquisition set-up parameters such             to now. Various scenario’s ranging           Test.Lab Rotating Machinery Rev 6
        as frequency or RPM resolution, or to          from 16 to 64 channel tests, resulted        provides full flexibility in choosing the
        further increase the number of channels        in convincing user benefits:                 appropriate combination of on-line and
        that are measured simultaneously.                                                           off-line analysis. During user tests,
                                                       • LMS Test.Lab doubled the number            this was strongly valued by testing
        Rev 6 of Test.Lab Rotating Machinery             of orders measured in parallel from        teams that require further detailed
        offers a true real-time online visualization     32 to 64 to capture more online            investigations after the data acquisition.
        of the acquired data and provides                engineering information on engine          Next to the extended online real-time
        permanent visual feedback on the                 orders and expand the frequency            performance and analysis capability, the
        progress of a test. Users can evaluate           range covered by the original test.        Rev 6 of LMS Test.Lab performed post-
        the quality of their data on the spot and        In addition, Test.Lab improved the         processing tasks up to 3 times faster
        can immediately interrupt a running test         order resolution with a factor of 2.       than the procedures currently used.
        if a deviation is observed. This minimizes
        the number of repeat runs to capture
        the required data set and increases the        “We extensively tested LMS Test.Lab Rev 6 on the Fiat proving
        overall confidence in the test results.
                                                       grounds. Standardized setup parameters, attribute publishing,
        LMS Test.Lab Rev 6 processes the               immediate feedback on data quality and automated interfacing with the
        data during the actual acquisition and         software, allow the driver to focus on the driving conditions and test
        delivers a full analysis results set upon
        completion of the measurement. This
                                                       requirements. With Rev 6, LMS Test.Lab made another step in reliable,
        parallel processing can include time and       user friendly and productive testing”
        frequency data, order sections with user
        definable bandwidth, octave sections,          Salvatore Esposito, NVH mobile testing responsible for FIAT AUTO

                                                                                                              LMSNEWS - October 2005   | 5 |
| physical prototype testing |

New MIMO Sine Testing                               frequency response functions (FRF) for            ratios. The applications of MIMO Sine
accelerates structural testing                      noise path contribution or experimental           Testing range from measuring frequency
                                                    modal analysis. The widely adopted                response functions for path contribution
LMS Test.Lab Structures Rev 6                       random excitation techniques are                  analysis, over (vibro-)acoustic
represents the most comprehensive,                  often unable to excite the structure              modal analysis to complex stiffness
state-of-the-art solution for structural            at sufficiently high levels across the            measurements of mounts and bushings.
testing and analysis avaible today,                 frequency range, resulting in signal-to-
covering both modal and operational                 noise ratio problems, long measurement            New Modification Prediction
modal testing applications. LMS Test.Lab            times (many averages) and noisy FRFs.             allows quick what if studies
embeds leading-edge modal technology
in easy-to-use application workbooks                Stepped sine excitation techniques                Rev 6 introduces a new Modification
that capture all process steps, including           offer a valid alternative to measure              Prediction solution into LMS Test.Lab,
test preparation, setup, acquisition,               high-quality FRFs, since they are able            which allows quick ‘what if’ studies
processing, analysis, reporting and                 to concentrate the excitation energy              and supports testing teams in easily
data sharing. The crystal-clear LMS                 at a single frequency and excite the              exploring alternative solutions to optimize
PolyMAX stabilization diagrams greatly              structure at much higher energy levels.           the dynamic behavior of their designs.
simplify the analysis process and                   However, the data acquisition becomes             Modification Prediction allows the
eliminate the operator dependency                   rather slow, with measurement times               evaluation of the effect of basic mass,
of the resulting modal model, also for              that are much longer compared to the              stiffness and damping modifications, in
complex and highly damped structures.               random techniques. LMS Test.Lab Rev               addition to the effect of adding a tuned
                                                    6 introduces a new MIMO Sine Testing              absorber. Multiple modifications can be
LMS Test.Lab Rev 6 features new sine                solution that delivers the high excitation        prepared and saved in a modification set.
testing capabilities that strongly increase         levels of a stepped sine technique and            The effect of such a set of modifications
the efficiency in identifying the structural        measures high amplitude level FRFs at             on a modal model can be calculated
characteristics of a mechanical design,             the same or a higher speed than with              and compared to the original situation.
especially for analyzing non-linear                 a broadband averaging technique. In               This includes features like optimization
behavior. Ground vehicle manufacturers              addition to this major breakthrough,              algorithms for connections points,
make extensive use of damping material              MIMO Sine Testing delivers leakage free           online FRF synthesis to evaluate the
to reduce overall noise and vibration               and less noisy measurements, supports             effectiveness of the patch, automatic
levels. This obviously makes it more                the quantification of non-linearities             ‘tuned absorber’ tuning, quick ranking
challenging to measure vibro-acoustic               and brings excellent signal and noise             of multiple modifications, etc.




The new sine testing capabilities strongly increase the efficiency in
identifying the structural characteristics of a mechanical design




MIMO Sine testing provides modal analysis for large and complex structures   LMS PolyMAX allows getting operator independent modal parameters of
where broadband excitation with sufficient energy is difficult.              large, complex and highly damped structures.




| 6 | LMSNEWS - October 2005
                                                                                                   | physical prototype testing |




LMS Test.Lab Environmental Rev 6: new test                             LMS Test.Lab provides the industry’s
sequencing automates vibration control testing
                                                                       most powerful, high-speed multichannel
LMS Test.Lab provides the industry’s most powerful, high-speed         vibration control system, with extensive
multichannel vibration control system, with extensive data
analysis capabilities for random, shock, sine and combined             data analysis capabilities for random,
modes tests. The LMS Test.Lab system also provides a high
                                                                       shock, sine and combined modes tests
performance on-line data reduction of random, sine, transient
and acoustic signals. Rev 6 introduces Test Sequencing in
LMS Test.Lab Environmental, supporting the definition and
execution of a series of closed loop vibration control tests
in a user-friendly way. For a smooth and unattended batch
execution, the workbook supports mixing all test modes
(random, sine, shock, and combined), do-loops, pause
commands and a variety of self check options. In addition, it
is possible to automatically run MS Windows programs as part
of the schedule. This can be used to control other equipment
in the lab, synchronize vibration testing with functional or
climatic testing, or keep the operator up to date on the progress
of the test sequence using email or wireless messages.
With Rev 6, LMS Test.Lab gains a new capability for time
recording during sine & sine dwell control. This new
functionality allows users to store the raw time data, parallel
to a sine or tracked sine dwell control test. The user can
select the sample rate for this parallel recording by specifying
the desired amount of over sampling - with respect to the
maximum frequency of the sweep. The recorded time data
can be further processed using all post-processing products
that support this format. This allows the identification of
the dynamic characteristics of components such as engine
mounts and suspension systems, and more specifically the            In addition to smooth and unattended batch execution, the Test Sequencing
nature and frequency-dependency of their non-linearities.           workbook keeps you up to date on the batch job progress using email, SMS
                                                                    or paging.




                                                                                                         LMSNEWS - October 2005      | 7 |
| physical prototype testing |

LMS Test.Lab Pass-By Noise: first solution
compliant with new ISO36 standard

Complying with pass-by noise legislation is imperative for
car, truck, motorcycle and recreational vehicle manufacturers
to bring their products to market. In spite of efforts to set
realistic acoustic radiation targets for individual components
and to meet these targets “by design”, a lot of pass-by
noise problems are identified while testing the prototype.

Changing regulations further increase the complexity of
the problem. The ISO362 standard, which is the basis
for most pass-by noise legislation, has recently been
reviewed to represent more realistic driving conditions.
It will most likely apply to vehicles brought to market
in 2008, of which the development starts today.

The LMS Test.Lab pass-by noise system offers a complete
solution for the evaluation of vehicle noise emission against
predefined targets or legislative standards like the ISO362,
SAE J1470, and new revisions of the ISO362 standard.
The LMS Test.Lab system combines powerful and easy to
use acquisition capabilities with a complete tool set for
the in-depth engineering analysis of noise emissions.

The LMS Test.Lab pass-by noise system guides the user
through the software in an intuitive way from test setup,
over measurement and analysis, up to the final data
comparison and reporting. LMS Test.Lab provides online
feedback to the driver on the progress and the quality
of the measurement. This strongly increases testing
                                                                 The LMS Test.Lab pass-by noise system offers a complete solution for the
productivity and reduces room for human errors. Highlights       evaluation of vehicle noise emission against predefined targets or legislative
of the new LMS Test.Lab pass-by noise system:                    standards like the ISO362 , SAE J1470, and new revisions of the ISO362 standard.

• Complete system that supports current and
  new revision of ISO362 standard
• Open platform that easily integrates new stan-
  dards or company-specific procedures
• Configuration for vehicle-based or track-
  based data acquisition
• Easy documentation of the test, through automated
  selection of attributes from databases
• Driver’s aid gives online feedback on the progress and the
  quality of the measurement and allows one-man operation
• Interactive online display links cursor of OAL result
  with 1/3 octave at same position on the test track
• Remote checking of weather conditions,
  no need to go to the test track
• Transparent data management and application
  dedicated reporting capabilities enable an efficient
  evaluation and distribution of testing results
• Throughput time data are available for further processing




Download the new LMS white paper on
pass-by noise on www.lmsintl.com/pbn                8

| 8 | LMSNEWS - October 2005
                                                                                                                     | physical prototype testing |

  LMS Test.Lab builds on ASAM-                           yearlong involvement, LMS always focused               and save data in an ASAM-ODS compliant
  ODS to increase noise and                              on ASAM-ODS (Open Data Services),                      database following the ASAM ODS 5.0
  vibration data transparency                            a data management standard that                        standard. LMS Test.Lab’s standardized
                                                         allows engineering data to be effectively              way of storing noise and vibration data
  Compressed development cycles and                      shared between multiple applications of                enables companies to secure their
  decentralized engineering activities put               different vendors. Technically spoken,                 technical legacy data and to retain their
  increased pressure on standardization                  the standard defines the client-server                 independency with regard to external
  that facilitates the storage and exchange              interface, the physical storage of the                 software vendors. The data storage
  of noise and vibration engineering data.               data and guidelines as to how data needs               strategy of LMS Test.Lab is also in line
  The early participation of LMS in the                  to be structured or what descriptive                   with the industry trend to stay with native
  ASAM standardization consortium led                    meta information to be specified. Since                application file formats while acquiring
  to the gradual adoption of the open                    noise and vibration related data typically             and analyzing test data, and use open
  ASAM-ODS standard in the LMS Test.                     requires additional descriptive attributes             data formats during subsequent post-
  Lab product offering. This enables                     to uniquely characterize the data, ASAM                processing stages. LMS Tec.Manager
  organizations to put in place a true                   defined a dedicated ASAM-ODS NVH data                  extends the LMS Test.Lab offering by
  vendor-independent data management                     model standard with a more extended                    providing web-based data organization
  system, which can be accessed out-of-                  set of attributes. As part of the ongoing              and interpretation capabilities. The LMS
  the-box by different commercial software               ASAM-ODS implementation, LMS Test.                     Tec.Manager solution in ASAM-ODS
  packages. Today, LMS Test.Lab supports                 Lab Rev 5 introduced the ASAM-ODS                      enabled and provides powerful, flexible
  standardized ways to efficiently handle                hub, which makes it possible to access                 web access to all test data available.
  large bulks of noise and vibration data,
  and to flexibly manage measurement data
  by adding context-specific information.

  In the late eighties, a number of German
  automotive manufacturers collectively
  responded to the typical software
  and data incompatibility barriers by                          LMS Test.Lab is the perfect solution to secure technical
  establishing ASAM, the Association                            legacy data and to retain software vendor independency
  for Standardization of Automation and
  Measuring systems. Throughout its




                                                                                  LMS Tec.Manager
                                                                                       server



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                                                Direct access                       ASAM-ODS API                                      ASAM-ODS
                                                                                                                                       database
                                                                                                                 ASAM-ODS
                                                                             LMS Test.Lab                          server
  Native application file formats (universal file, SDF,
    RPC, nCODE DAC, LMS CADA-X PDB, TDF,...)


Incorporated into LMS Test.Lab is LMS Tec.manager, an ASAM-ODS compliant data management solution that enables users to efficiently
search, access and compare noise and vibration related engineering data, regardless of the applications that generated the data originally.




                                                                                                                           LMSNEWS - October 2005   | 9 |
| physical prototype testing |


Pushing the NVH performance
envelope of rubber components
Tokai Rubber Industries leverages LMS test and simulation
solutions to shape its new role of total solution provider

Engineering the NVH performance of a vehicle is one of the most demanding challenges in
automotive design, especially when it comes to deciding which materials to use, how to shape
components and where to position them. The NVH expertise gained during decades of developing
innovative and effective anti-vibration rubber products helped Tokai Rubber Industries (TRI) to
successfully take up this new supplier role. Continuous investments in rubber material research
and the deployment of a simulation-driven product development approach enable TRI to regularly
introduce new design concepts. LMS simulation and testing solutions assist TRI in shaping new
products that further improve NVH performance and reduce production cost.




| 30 | LMSNEWS - October 2005
                                                                                                   | physical prototype testing |

Rubber material offers                          better understanding of how structural        analysis and post-processing steps.
infinite NVH possibilities                      aspects impact different noise and            Tests that TRI engineers perform on
                                                vibration performance attributes.             complete vehicles typically occur in
Tokai Rubber Industries (TRI) is currently      This enables them to select the most          a hemi-anechoic chamber, which is
the largest supplier of vibration-              appropriate design concepts up-front          equipped with a chassis dynamometer
suppressing rubber products in Japan.           and efficiently move the development          and a vehicle shaker. Under specific
Over the last 70 years, it gained the           of new product designs into innovative        driving conditions, the sound and
trust of many customers across different        directions. Later in the development,         vibration responses at multiple interior
industries by designing and producing top-      more detailed analytical assessments in       locations and across a wide range
class rubber and resin based parts. TRI         combination with systematic test-based        of system components are acquired.
delivers anti-vibration rubber products,        validations make it possible to gradually     Afterwards, engineers perform TPA and
hoses, noise insulators and interior parts      optimize specific characteristics and         ASQ analyses to identify the contribution
to automotive manufacturers around              establish the most favorable tradeoffs        of individual devices to both structure-
the world. More recent developments of          between conflicting attributes.               borne and air-borne noise, and to
anti-vibration products include liquid-filled                                                 evaluate this information in context of the
Active Control Mount (ACM) devices,             Further extending                             overall NVH performance of the vehicle.
which directly eliminate firing order           experimental NVH expertise                    Important in such tests are LMS Test.
vibrations before they can be transmitted                                                     Lab’s on-line processing features, which
to the structure of the vehicle.                For over 20 years, TRI builds on              allow TRI engineers to draw intermediate
                                                LMS testing solutions to perform its          conclusions on the basis of partially
The diverse material characteristics of         extensive range of NVH-related testing        acquired data. The insights gained from
rubber and its numerous combinations            assignments. During this longstanding         these early analyses enable them to
with metal, glass, plastic, resin, foam         relationship, TRI successfully deployed       adapt the focus of the remaining testing
or composite material offer infinite            LMS SCADAS front-end hardware, LMS            work, while still having the test object
possibilities to reduce vibrations              CADA-X, and more recently, LMS Test.          at their disposal. Specific assessments
and to tackle structure-borne noise             Lab test software. The extensive NVH          TRI engineers perform on individual
issues. To take full advantage of these         engineering know-how accumulated while        components serve a different purpose.
opportunities, TRI continuously invests         using these systems provides TRI a head       They install components on test benches
in rubber material research to increase         start for each new product development        to verify the strength and durability
its capability to develop innovative            program that is initiated. In addition,       performance characteristics that have
rubber types that combine superior NVH          the recent introduction of LMS Test.Lab       been predicted earlier on. These test
characteristics with reduced production         increased testing efficiency significantly,   results are then used in a feedback loop
costs.                                          as it operates according to an integrated     in order to further optimize the design
                                                process-oriented flow that efficiently        and to obtain a more favorable cost-
Changing relationships                          captures all sequential acquisition,          function equation.
between OEMs and suppliers

To succeed in implementing shorter
development lead times with reduced
development resources and expenses,
automotive OEMs no longer opt for
suppliers that solely develop top-class
products and offer outstanding technical
expertise. As tier-one system suppliers
are expected to take on increased
levels of responsibility, they require the
capability to efficiently develop new
products, integrate them into a new
vehicle prototype, and fine-tune the
overall vehicle NVH performance. TRI
partners and collaborates with OEMs
and other suppliers by implementing
design, simulation, analysis and testing
capabilities that previously were the
exclusive domain of the OEMs. Adopting
these capabilities helps anticipate
                                                  “The introduction of LMS Test.Lab increased testing
how new products will operate on
their own and integrated into larger              efficiency significantly, as it operates according to
assemblies. More in particular, the use           an integrated process-oriented flow that captures
of predictive software solutions early in
the development offers TRI engineers a
                                                  all sequential testing operations”

                                                                                                        LMSNEWS - October 2005   | 31 |
| physical prototype testing |

Establishing a simulation-                   quantification of individual engine mount      recently, TRI also established a center in
driven product development                   contributions. In the case of a small          Novi, Michigan to serve North American
                                             four-wheel-drive vehicle, engineers used       and European automotive markets. This
Since 1990, TRI started with the             LMS RMA and TPA software to evaluate           technical center is equipped with a
introduction of CAE solutions in its         the vehicle model for specific frequencies     4-wheel chassis dynamometer in a hemi-
product development workflow. Today,         and retrieve the transfer paths that           anechoic chamber and a 4-poster vehicle
TRI engineers use LMS SYSNOISE to            matter most. After this, they validated the    shaker along with component testers for
simulate emanated noise levels at interior   prediction accuracy of the vehicle model       durability testing in single and multiple
and exterior vehicle locations, and LMS      through comparison with test results.          axes. TRI engineers use this center’s
TWR to monitor mechanical endurance.         Based on these analyses, the engineers         test infrastructure and software seats
The strategy of TRI is to perform            proposed two countermeasures to                to productively execute and coordinate
full-vehicle NVH simulation whenever         reduce the idle vibrations that occurred       in-depth technical development and
feasible, and use the outcome to support     around 600 rpm engine speed. The first         integration work. Local presence enables
decisions related to design optimizations    option was to decrease the fore and aft        them to maintain regular face-to-face
and troubleshooting actions. In parallel     dynamic spring characteristics of both         customer contacts without language
to vehicle-level evaluations, component      engine mounts. This option was not             barriers, and makes it easier to more
and system simulations are performed         retained because it increased vibration        frequently run full-system test cycles
to predict resonance frequencies and to      levels during vehicle acceleration and         on customers’ prototype vehicles and
detect structural areas facing extreme       deceleration. Instead, they selected           modules.
loading.                                     the second option, which included the
                                             installation of a liquid-filled engine mount   TRI invests a lot in establishing and
As a supplier of engine mount systems,       at the right-side mount position and the       maintaining successful customer
TRI is often involved in idle vibration      adaptation of its phase characteristics in     relationships by developing effective
optimization. To drill down on these         the vertical direction.                        and affordable anti-vibration rubber
disturbing vibrations, TRI engineers                                                        products and offering multiphysics
run modal tests and simulations to           Top product performance and                    expertise provided locally. The capability
investigate complex decoupled resonance      local technology expertise                     to leverage tools, technology and
phenomena, including rigid engine                                                           expertise is essential to TRI in order
modes, bending and twisting body modes       To efficiently support its intensive           to systematically realize technical
and steering system resonances. Equally      technological relationships with Asian         advancements that consequently push
important in these assessments are           customers, TRI opened a dedicated              the NVH performance envelope of its
the analysis of transfer paths and the       technical center in Komaki, Japan. More        innovative product portfolio.




                                                                                                 “For over 0 years, Tokai
                                                                                                 Rubber Industries builds
                                                                                                 on LMS testing solutions
                                                                                                 to perform its extensive
                                                                                                 range of NVH-related
                                                                                                 testing assignments”




| 3 | LMSNEWS - October 2005
                                                                                              | physical prototype testing |


Cetim deploys portable LMS Pimento analyzers to
support its noise and vibration engineering activities

The technical center Cetim,                   A project Pimento has recently been         Pimento’s versatility fits
headquartered in Senlis, France,              involved in is the investigation of the     any test assignment
performs technology research in support       vibration effect of a fuel pump in
of French manufacturing companies             operation on the structure of a gasoline    Since the group’s activities cover many
and executes dedicated consultancy            tank. Dominique Carreau, project            different fields of noise and vibration
projects on demand of international           manager at Cetim in Senlis, France,         engineering, Cetim particularly values
customers. In this regard, Cetim’s noise      explains, “Five Pimento channels            Pimento’s extensive set of applications,
and vibration department has deployed         acquire triaxial accelerometer signals      which includes FFT and octave analysis,
multiple portable LMS Pimento analyzers       in order to characterize the structural     full modal investigations, sound power
to execute in-house as well as on-site test   performance of seven different fuel tank    procedures and sound intensity with
assignments. Cetim selected Pimento           designs. Each time, during a period of      source localization capability. Dominique
for its broad range of applications,          20 seconds, the Pimento stores the time     Carreau concludes, “Thanks to Pimento’s
its intuitive test procedures, and the        data for later reference and generates      intuitive procedures and navigation,
compact rugged design.                        the corresponding frequency data in real    our engineers and technicians are able
                                              time. In this case, the post-processing     to easily access any of the available
A pool of 500 engineers                       comprised the generation of a long          applications, regardless whether
and technicians                               series of spectral curves followed by       executing a predefined test procedure or
                                              an in-depth investigation of the results.   dealing with a specific troubleshooting
Cetim, founded 40 years ago on the            Pimento offers the opportunity to post-     case. In addition, our portable Pimento
initiative of the French federation           process the acquired data on the spot,      noise and vibration analyzers integrate
of mechanical industries, conducts            but engineers often prefer to take the      many ISO and EC compliancy test
collective research and development for       Pimento to the next test assignment         procedures and offer straightforward
mechanical manufacturing companies            and analyze the acquired data at a more     means to quickly define new procedures
located in France. The technical center       convenient time.”                           and formulas.”
also uses its extensive expertise in
support of international research
programs and as part of contractual
assignments requested by customers
worldwide. Among Cetim’s 500 technical
employees, a dedicated group of 25
noise and vibration specialists assist
manufacturers in optimizing the noise
and vibration performance of many
products across different markets,
including industrial equipment, airplanes,
ground transportation systems,
agricultural equipment, garden tools and
home appliances. In some cases, the
focus is not just on reducing noise and
vibration levels, but also on engineering
specific sounds that are appealing to
customers.




                                                 “Our LMS Pimento noise and vibration analyzers integrate
                                                 ISO and EC compliancy test procedures and offer means
                                                 to quickly define procedures and formulas”




                                                                                                   LMSNEWS - October 2005   | 33 |
| physical prototype testing |


Milliseconds to prevent permanent crash injuries
Autoliv optimizes vehicle safety equipment using LMS testing solutions

Although cars today are much safer than 20 years ago, traffic accidents kill thousands of people
every year and seriously injure nearly five million. The mission of Autoliv is to continuously
increase vehicle occupant protection by introducing breakthrough safety innovations and
extending its specialized safety equipment offering. To evaluate the performance of airbag and
seat belt systems – and reduce the noise they generate – Autoliv uses LMS test systems to
measure noise levels that test dummies face during crash simulation tests. LMS test systems
are also used to evaluate individual safety products, such as seat belts, seat frames and steering
column assemblies. Overall, LMS Test.Lab guarantees maximum measurement reliability and
reduces testing throughput substantially.




| 34 | LMSNEWS - October 2005
                                                                                                            | physical prototype testing |




 In dedicated acoustic test facilities, Autoliv engineers perform noise measurements inside vehicles
 equipped with a series of fully-integrated seat belt and airbag prototypes, occupied by up to five
 crash test dummies.




Optimum occupant protection                         does not become too high. In this way,             of occupants’ ears. This ear reflex is a
is primary concern                                  the excessive energy is absorbed more              self-protective reaction that temporarily
                                                    uniformly by the frontal airbag, which by          inactivates hearing capability after
Autoliv is a worldwide leader in                    that time is fully inflated. The primary           approximately 10 milliseconds. This
automotive safety systems – a pioneer               purpose of the airbag is to cushion head           means that during this period, it is
in both airbags and seat belts – and a              and chest and prevent both from striking           likely that occupants suffer less from
technology leader that offers an extensive          hard surfaces in the front of the vehicle,         subsequent airbag initiator noise.
portfolio of vehicle occupant protection            such as steering wheel, dashboard
products. Its latest contributions to               and windshield. Seat belts and airbags             In dedicated acoustic test facilities,
automotive safety include an anti-                  significantly reduce the risk of serious           Autoliv engineers perform noise
whiplash seat, a side-impact airbag                 injuries and occupant fatalities in frontal        measurements inside vehicles equipped
for chest protection, and an inflatable             crashes. To protect driver and passengers          with a series of fully-integrated seat
head-protection curtain designed for                against side-impact accidents, Autoliv             belt and airbag prototypes, occupied
lateral impact. Currently, Autoliv is in            offers dedicated head, pelvis and thorax           by up to five crash test dummies. A
the forefront of developing roll-over               airbags to be integrated in the vehicle            dedicated trigger unit precisely executes
protection, night vision and pedestrian             interior.”                                         a predefined trigger sequence to
protection systems. Autoliv is a supplier                                                              activate seat belt restrainers and airbag
to all major vehicle manufacturers and              Battle against unbearable                          detonation. Microphones, integrated
most vehicle brands, and every year its             airbag explosion noise                             in all dummies’ ear positions, capture
products save over thousands of lives and                                                              the noise generated by successively
prevent many more severe injuries.                  As part of the development of new                  exploding initiator mechanisms and
                                                    safety products, Autoliv invests                   transfer them to an LMS SCADAS III
In the event of a car accident, a                   significant research and development               front-end. Autoliv engineers use LMS
predefined sequence of actions is                   effort in reducing the noise generated             Test.Lab and LMS CADA-X test software
initiated to protect the occupants of the           by pyrotechnic initiator mechanisms.               to manage the communication with the
vehicle. Thomas Norberg, Laboratory                 It is desirable to reduce this explosive           trigger unit and to process the acquired
Manager at Autoliv in Vårgårda, Sweden,             noise level, as it may increase the risk           data. The complete sequence of such
describes what happens starting at the              of hearing damage. Apart from sound                tests is often recorded with dedicated
onset of a crash, “A small pyrotechnic              pressure levels, the human ear is very             video cameras.
charge activates belt pre-tensioners,               sensitive to the timing sequence of
which tighten the belts and restrain                the initiation of the safety devices.              Thomas Norberg explains that the
the occupants as early as possible.                 In general, a firm sound, for example              recorded noise time signals form the
After this action, load limiters make               from a pyrotechnic belt pre-tensioner              basis for running dedicated frequency
sure the load on the occupant’s chest               initiator, activates the Stapidus reflex           analyses that provide insight into



                                                                                                                 LMSNEWS - October 2005   | 35 |
| physical prototype testing |




        “Our experience with LMS Test.Lab clearly demonstrates that
        testing throughput times are compressed drastically, mainly as a
        result of the software’s higher flexibility and efficiency standards”
        Thomas Norberg - Laboratory Manager at Autoliv




maximum amplitudes and most                   negatively influence the comfort            measurements into a representative
dominating frequency components.              of driver as well as passengers. To         and effective shaker table control
“The main purpose of these kinds of           reduce noise disturbances, Autoliv          spectrum. To further increase the test
investigations is to examine the noise        engineers execute environmental             capability and turnover of its noise test
performance of different types of             noise measurements on specific safety       facilities, Autoliv extended its existing
explosive materials as well as to fine-tune   equipment. While a unidirectional           LMS CADA-X installed base with LMS
the mechanics of airbag initiator designs     shaker system mechanically excites a        Test.Lab. Thomas Norberg summarizes
during the final stages of development.       newly-developed seat belt assembly          how this affects his testing operations,
A specific proprietary algorithm is           or a folding steering column with           “Already for many years, we rely on
developed to convert the acquired test        integrated airbag assembly, for example,    LMS test systems to accommodate
data of each microphone into one single       the resulting noise is measured and         for our dedicated and varying testing
numerical value that reliably reflects the    analyzed. These environmental tests can     requirements. Our experience with
risk of hearing damage. The use of this       be quite relentless because the shaker      LMS Test.Lab clearly demonstrates that
algorithm increases the efficiency and        system is able to excite over half a ton    testing throughput times are compressed
consistency of the evaluation process         of weight with accelerations up to 60g.     drastically. The associated productivity
of the noise measurements, as it allows       In addition, the ambient temperature        gains mainly result from the software’s
the noise performance of new design           present can vary between -50 and            higher flexibility and efficiency standards
modifications to be quickly interpreted       +110 degrees Celsius. The purpose           that help speed up test setup and post-
and compared with previous results.”          of these tests is to execute safety         processing stages. Also LMS Test.Lab’s
                                              system benchmark tests and to further       process-driven application workbooks
Eliminating undesired safety                  drive development innovation. Autoliv       accelerate our repetitive benchmark
equipment sounds                              engineers compile the vibrations they       testing activities and increase the
                                              apply to test specimens on the basis of     involved data consistency significantly.
At the Autoliv noise test laboratories,       accelerometer measurements taken on         Autoliv engineers consider high data
engineers also focus on eliminating           identical or similar safety equipment       acquisition accuracy, custom calculation
undesired sounds generated by other           during test vehicle investigations on       flexibility and reliable external interaction
safety-related equipment, such as seat        roads and test tracks. Using LMS Test.      as the core to further step up testing
belts and seat frames, during their           Lab, they perform random Power              productivity and strengthen their
normal operation. Even the weakest            Spectral Density (PSD) calculations to      commitment to realize optimum occupant
noises produced by such systems               accurately convert the acquired vibration   protection.”




| 36 | LMSNEWS - October 2005
                                                                                                | physical prototype testing |


New LMS TecWare Rev 3.1 substantially
accelerates load data analysis
New Rev 3.1 introduces new automated procedures
to consolidate, analyze and share load data

A critical factor for successful mechanical   Streamlining the entire load                 load data, regardless whether the data
engineering is gaining a precise              data processing sequence                     originate from test, simulation or design.
understanding of the loads that products
will undergo during their anticipated         Using the broad range of load data           Brand new in the Batch module of
lifetime. The availability of realistic       processing capabilities that are available   LMS TecWare Rev 3.1 is the so-called
load data is vital for running reliable       in LMS TecWare Rev 3.1, engineers            ProcessBuilder, a dedicated graphic
simulations and rig test campaigns. To        are able to efficiently analyze the vast     environment for defining, optimizing and
better support test and simulation driven     amounts of accumulated load data.            executing specific sequences of LMS
mechanical engineering, LMS releases          Besides effective load data cleaning         TecWare load data processing tasks.
LMS TecWare Rev 3.1, featuring a web-         and validation, LMS TecWare focuses          No programming skills are required,
based load data management capability         on monitoring and comparing essential        since ProcessBuilder allows process
that facilitates the use of realistic load    loading aspects from a durability            schemes to be intuitively defined by
data throughout the entire development        perspective. Reports consisting of any       dragging, dropping, copying and pasting
process. New is also the powerful             combination of time histories, rainflow      individual process blocks. Each block
graphic environment that streamlines          matrices, frequency information,             defines a specific action that needs to
the complete load data processing             statistics and fatigue predictions are       be performed on the data, such as for
chain – from raw load data to load            essential in selecting representative        example time signal viewing and editing,
histories for driving virtual and physical    loading scenarios for further test and       filtering, spike/drift/offset removal,
durability rig tests. LMS TecWare Rev         CAE based durability engineering.            rainflow counting or Power Spectral
3.1 also excellently applies to optimizing    They also contribute to acquiring the        Density (PSD) calculation. To keep a
existing test schedule definitions and        necessary engineering insight to improve     clear overview of a complex process
creating new (customer-correlated) test       the correlation between different sets of    that involves large volumes of load data,
schedules.




                                                                                                     LMSNEWS - October 2005   | 37 |
 | physical prototype testing |



                             Design                         Performance simulation                                         Test
LMS TecWare




                                                     Durability data management
                        Load data processing
                                                           Streamline


                Load                                                                                        Load       Test schedule       Load
                          Consolidate           Interprete           Document             Compare
                data                                                                                        data         definition        data


 Regardless whether load data is generated through test, simulation or design, LMS TecWare supports and accelerates the use of a wide range of
 different virtual and physical durability-specific investigation methods and procedures.




 LMS TecWare offers the means to group               from power failures, spikes, offsets or              as multiaxial rainflow counting, the
 multiple connected blocks and display               drifts, LMS TecWare offers multiple ways             latter maintaining inter-channel phase
 them as a single block. In addition,                to implement data corrections manually               relationships through the use of linear
 procedures set up in ProcessBuilder                 or automatically. Especially when dealing            channel combinations.
 can be executed in parallel and around              with a high number of channels, improved
 the clock, without any user-interaction,            time editing features – such as easy                 Featuring powerful reporting
 and can entirely be reused as part of               scrolling and fast channel selection –               and data management
 a more complex process definition.                  further streamline the process of editing
 ProcessBuilder also features powerful               and handling time signals. Also the                  To efficiently publish and share load data
 process debugging capabilities and                  tabular channel display with convenient              processing results, LMS TecWare Rev
 parameter definitions that can be made              channel grouping capability illustrates              3.1 offers flexible reporting capabilities.
 dependent on processed channel data.                LMS TecWare’s fit-for-purpose for dealing            Besides standard reports, LMS TecWare
                                                     with large data sets.                                provides the possibility to configure the
 Efficiently acquiring detailed                                                                           content and layout of reports according
 durability-related insight                          A core capability of LMS TecWare is its              to personal preferences and company
                                                     extensive range of dedicated durability-             guidelines. LMS TecWare automatically
 To automatically import load time data              specific data interpretation methods –               generates reports in HTML and Microsoft
 derived from test track measurements,               based on statistics, rainflow counting and           Word format, and from Rev 3.1 on, it also
 rig test campaigns or virtual simulations,          PSD calculation – that enable engineers              places report references in LMS TecWare
 LMS TecWare offers an extensive set of              to efficiently qualify and quantify the              data sets so that reports can be opened
 data drivers, including but not limited             durability potential of load data. With this         directly in Microsoft Word from within
 to LMS Virtual.Lab, LMS Test.Lab,                   new release, LMS TecWare increases the               LMS TecWare. Sharing data sets between
 IST RigSys, MTS RPCIII, NI DIADEM,                  availability of statistical representations,         multiple users also becomes a lot easier
 nCode DAC, ASCII and Universal Binary.              which now also include bar charts, spider            because LMS TecWare is now capable of
 Since the interactive inspection and                diagrams and Weibull representations.                automatically updating all the links to the
 consolidation of each individual signal             In addition to statistical solutions, LMS            data. In addition, the new release of LMS
 would take far too long, LMS TecWare                TecWare provides the most complete                   TecWare offers a convenient one-click
 provides the capacity to automatically              offering of rainflow counting methods.               printing option, which allows any LMS
 locate any flaw in the acquired load data.          It supports uniaxial rainflow counting               TecWare report or result file to be printed
 To correct signal inaccuracies resulting            (range pair and level crossing) as well              on the spot.


 | 38 | LMSNEWS - October 2005
                                                                                                           | physical prototype testing |




The new ProcessBuilder of LMS TecWare features a graphical interface        The tight integration with LMS Tec.Manager offers a web-based load data
that captures the entire data processing sequence into a single automated   management solution to efficiently search, retrieve, access and share
process.                                                                    durability data.




To efficiently search, retrieve and access          damage potential as originally present            fatigue design processes, and to validate
specific load data sets or durability-              – enabling both the generation of new             the analysis capabilities by rigorous
related analysis results from a large pool          test schedules as well as the optimization        comparison with test results.
of accumulated data, LMS TecWare 3.1                of existing test schedules. In this regard,
tightly integrates LMS Tec.Manager, a               the new release of LMS TecWare offers             Innovating and accelerating the
unique web-based data management                    tools that, for example, reduce these             durability engineering process
solution. This solution allows any file or          essential load data signals to a number
database to be opened in a web browser              of dedicated sine wave repetitions. The           Since LMS TecWare Rev 3.1 steps up both
and exhibited in a variety of graphical             application of such block cycle test              the efficiency and consistency of data
displays, each in its own native format. In         definitions works particularly well for           processing sequences, it streamlines the
addition, LMS Tec.Manager’s advanced                rubber parts, bushing assemblies and              process of consolidating acquired load
data search queries – which operate on              rotating components.                              data and investigating their durability-
the basis of meta information – are able                                                              specific characteristics. Regardless
to quickly find and return a link to even           For over a decade, LMS delivers                   whether load data is generated through
the smallest piece of data buried among             advanced durability-related test and              test, simulation or design, LMS TecWare
hundreds of thousands of files.                     simulation solutions to the majority of           supports and accelerates the use of
                                                    automotive OEMs, which include Audi,              a wide range of different virtual and
More effective test schedule                        BMW, DAF, DaimlerChrysler, Ford,                  physical durability-specific investigation
definition and optimization                         GM, Honda, Hyundai, Opel, Porsche,                methods and procedures. This allows
                                                    Proton and Volkswagen. Among other                engineers to gain more accurate insight
Since test drives of hundreds of                    LMS TecWare customers that offer                  into the durability performance of new
thousands of kilometers are no longer               products and services to automotive               product designs in every step of the
an option in today’s compressed                     and other markets, LMS counts Bosch,              development process. In particular when
development cycles, manufacturers are               DANA, Michelin, Mitsubishi Truck & Bus,           supporting better-informed decisions
urged to replace lengthy vehicle tests by           Renault Truck, Siemens, Tokai Rubber,             from the earliest design stages onwards
equivalent accelerated laboratory tests             Valeo, Vibratec and ZF. All along, LMS            – when there is still plenty of design
or virtual simulations. LMS TecWare                 has been closely working together with            flexibility – manufacturers succeed
supports this critical shift by efficiently         key customers and leading research                in reaching higher levels of design
determining sets of compressed load                 institutes to ensure that the most                innovation and bringing more reliable and
time histories that preserve the same               advanced techniques fit into industrial           appealing products to market faster.


                                                                                                                 LMSNEWS - October 2005      | 39 |
LMS INTERNATIONAL
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                                                                                     LMS is an engineering innovation partner for
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                                                                                     faster to market, and to turn superior process
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                                                                                     advantage. LMS offers a unique combination of
                                                                                     virtual simulation software, testing systems and
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LMS Test Division     Leuven [Belgium] | T +32 16 384 200 | info@lms.be
                                                                                     performance attributes in key manufacturing
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                                                                                     and sound quality. Through our technology,
LMS CAE Division      Leuven [Belgium] | T +32 16 384 200 | info@lms.be              people and over 25 years of experience, LMS
                                                                                     has become the partner of choice for most of
                      Kaiserslautern [Germany] | T +49 631 30322 100
                                                                                     the leading discrete manufacturing companies
                      Coralville, IA [United States] | T +1 319 626 6700             worldwide.

LMS Engineering       Leuven [Belgium] | T +32 16 384 200 | info@lms.be              LMS is certified to ISO9001:2000 quality
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