NX Nastran Dynamic Analysis

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					           SIEMENS UGS NX NASTARN Training

                                                                                                                            YY- Stress PSD



NX NASTRAN Dynamic Analysis

    Location          : I-VTech Solutions Pte Ltd                                                                       RMS=19.7 MPa


    Duration          : 4 Days
    Course Fee        : S$1500 / Pax
                                                                                     Dynamic Response



         The NX NASTARN Dynamics Analysis course is a comprehensive presentation of the dynamic capabilities avail-
able in NX Nastran. It covers both fundamental and advanced topics with an emphasis on practical applications and example
problems. The class is focused on the application of NX Nastran to solve real world dynamics problems. The fundamentals of
structural dynamics and the application of numerical methods to solve dynamics problems are covered. The theory is then
applied to the solution of real world dynamics problems using the dynamic analysis capabilities of NX Nastran. Delivery is
performed in the context of NX Nastran ASCII input and output files and not in the context of commercially available pre-
and postprocessors.


             Course Overview                                                                         Who Should Attend
•    Review of Fundamentals                                                                •    CAE Engineers
                                                                                           •    CAE Specialists
•    Dynamic Modeling Input
                                                                                           •    System managers
•    Normal mode analysis                                                                  •    Design Engineers
•    Reduction in Dynamic Analysis                                                         .
•    Rigid body dynamics
•    System Damping                                                                             Provided Course Materials
•    Transient Response Analysis
                                                                                           •    Student Guide
•    Frequency Response Analysis                                                           •    Work Book
•    Direct Matrix Input
•    Dynamic Equations of Motion                                                                          Prerequisites
•    Residual Vector Methods                                                               NX Nastran Linear Statics and Normal
•    Enforced Motion                                                                       Modes Analysis course
•    Shock and Response Spectrum Analysis
•    Random Response Analysis                                                                   For enquiries, please call:
•    Complex Eigenvalue Analysis
                                                                                            •   Jasmine (Tel: 6484 8863)
•    Normal Mode Analysis Using Parts
                                                                                                email: jasmine.tang@inno-venture.com
•    Superelement                                                                           •   Logesh (Tel: 6484 8863)
•    Normal Modes of Preloaded Structures                                                       email: Logesh@inno-venture.com
•    Dynamic Design Optimization
•    Test-Analysis Correlation
•    Dynamic design optimization

                         I-VTech Solutions Pte Ltd             www.inno-
                                                               www.inno-venture.com
Singapore - Blk 5012 Ang Mo Kio Avenue 5 #04-11 Techplace II Singapore 569876 Tel : 65-6484 8863 Fax : 65-6484 8861
JB - Suite 301 Level 3 Bangunan Ang No. 1 Jalan Jeram Taman Tasek 80200 Johor Bahru Tel : 607-2323 863 Fax : 607-2323 861
Penang - 18-35-C Menara Gurney Persiaran Gurney 10250 Penang Tel : 604-2289 863 Fax : 604-2289 861
           SIEMENS UGS NX NASTARN Training



NX NASTRAN Dynamic Analysis
                              Day 1                                                                    Day 1


Review of Fundamentals                                                  Normal Modes Analysis
•    Review of Fundamentals
•    Overview of dynamic analysis process                               •    Reasons to compute natural frequencies and normal
                                                                             modes
•    Single dof system
                                                                        •    Theoretical results
•    Units
                                                                        •    Important facts and results regarding
•    Single dof system - undamped free vibrations
                                                                        •    Normal modes and natural frequencies
•    Single dof system - damped free vibrations
                                                                        •    Additional modal properties
•    Damped free vibrations—underdamped case
                                                                        •    Methods of computation
•    Single dof system - undamped sinusoidal vibrations
                                                                        •    Sturm sequence theory
•    Magnification factor
                                                                        •    Lanczos method
•    Single dof system - damped sinusoidal vibrations
                                                                        •    User interface for lanczos method
•    Magnification factor
                                                                        •    User interface for all methods
•    Multi-degree of freedom system
                                                                        •    Solution control for normal modes
•    Classification of dynamic environments
                                                                        •    Case control output
•    Dynamic excitations
                                                                        •    Workshop #1 - modal analysis of a flat plate
•    Finite element dynamic modelling considerations
•    Nx nastran documentation                                           Reduction in Dynamic Analysis
•    Text references on dynamic analysis
                                                                        •    Introduction to dynamic reduction
Dynamic Modeling Input                                                  •    Reduction methods for dynamics available with nx
•    Nx nastran input file setup                                             nastran
•    Nx nastran bulk data entry format                                  •    Static condensation (internal calculation)
•    Finite element analysis                                            •    User interface
•    Commonly used elastic elements                                     •    Solution control for guyan reduction
•    Coupled versus lumped mass                                         •    Difficulties with guyan reduction
•    Rod finite element                                                 •    Modal reduction
•    Justification for nx nastran coupled mass convention               •    Solution control for modal reduction
•    Mass units                                                         •    Workshop #2 - normal modes analysis using guyan re-
•    Mass input                                                              duction
•    Conm2
•    Basic nx nastran set operations
•    Nx nastran set definition
•    Tips on model verification




                         I-VTech Solutions Pte Ltd             www.inno-
                                                               www.inno-venture.com
Singapore - Blk 5012 Ang Mo Kio Avenue 5 #04-11 Techplace II Singapore 569876 Tel : 65-6484 8863 Fax : 65-6484 8861
JB - Suite 301 Level 3 Bangunan Ang No. 1 Jalan Jeram Taman Tasek 80200 Johor Bahru Tel : 607-2323 863 Fax : 607-2323 861
Penang - 18-35-C Menara Gurney Persiaran Gurney 10250 Penang Tel : 604-2289 863 Fax : 604-2289 861
           SIEMENS UGS NX NASTARN Training



NX NASTRAN Dynamic Analysis
                              Day 2                                                                   Day 2

Rigid Body Modes                                                        •    Static load – indirect method
                                                                        •    Static load – direct method
•    Rigid body modes and rigid body vectors –                          •    Transient excitation considerations
•    Theoretical considerations                                         •    Initial conditions
•    Calculation of rigid body modes                                    •    Modal transient versus direct transient
•    Selection of “suport” degrees of freedom                           •    Solution control for transient analysis
•    Checking of “suport” degrees of freedom                            •    Case control output
•    Rigid body modes and rigid body vectors                            •    Workshop #3 - direct transient response
                                                                        •    Workshop #4 - modal transient response
Damping
                                                                        Frequency Response Analysis
•    Damping                                                            •    Introduction to frequency response analysis
•    Structural damping versus viscous damping                          •    Direct frequency response
•    Structural damping versus viscous damping                          •    Modal frequency response
•    (constant displacement                                             •    Excitation definition
•    Damping summary                                                    •    Rload
•    Structural damping                                                 •    Rload2
•    Viscous damping                                                    •    Frequency response considerations
•    Modal damping                                                      •    Freqi entries
•    Rayleigh damping                                                   •    Dynamic data recovery
                                                                        •    Modal versus direct frequency response

Transient Response Analysis                                             •    Sort1 versus sort2 output
                                                                        •    Solution control for frequency response
                                                                        •    Case control output
•    Introduction to transient response analysis
                                                                        •    Frequency-dependent springs and dampers
•    Direct transient response
                                                                        •    Cbush
•    Damping in direct transient response
                                                                        •    Pbush
•    Modal transient response
                                                                        •    Pbusht
•    Damping in modal transient response
                                                                        •    Frequency-dependent impedance sample
•    Data recovery in modal transient response
                                                                        •    Sample using cbush element
•    Mode truncation
                                                                        •    Displacement output for cbush element
•    Transient excitation
                                                                        •    Force output for cbush element
•    Tload1 entry
                                                                        •    Workshop #5 - direct frequency response
•    Tload2 entry
                                                                        •    Workshop #6 - modal frequency response
•    Load set combination - dload



                         I-VTech Solutions Pte Ltd             www.inno-
                                                               www.inno-venture.com
Singapore - Blk 5012 Ang Mo Kio Avenue 5 #04-11 Techplace II Singapore 569876 Tel : 65-6484 8863 Fax : 65-6484 8861
JB - Suite 301 Level 3 Bangunan Ang No. 1 Jalan Jeram Taman Tasek 80200 Johor Bahru Tel : 607-2323 863 Fax : 607-2323 861
Penang - 18-35-C Menara Gurney Persiaran Gurney 10250 Penang Tel : 604-2289 863 Fax : 604-2289 861
           SIEMENS UGS NX NASTARN Training



NX NASTRAN Dynamic Analysis
                              Day 3                                                                   Day 3

Residual Vector Methods
                                                                        Shock and Response Spectrum
                                                                        Analysis
•    Concept of modal approach
•    How do i compensate for the missing modal contents
•    Residual vector
                                                                        •    Response spectrum

•    User interface for residual vector
                                                                        •    Response spectrum generation

•    Example
                                                                        •    Applying spectra

•    Input file for using modal method
                                                                        •    Workshop #11 – generation of shock spectrum input

•    With residual vector
                                                                        •    Workshop #12 – application of the shock spectrum

•    Results comparison
                                                                        Random Response Analysis
•    General recommendation

                                                                        •    Classification of dynamic environments
Enforced Motion                                                         •    Random response analysis
                                                                        •    Random analysis theory
•    Enforced motion in dynamic analysis                                •    Examples of random dynamic environments
•    Analysis methods                                                   •    Example of ensemble of ergodic random data
•    Method 1                                                           •    Autocorrelation and autospectrum
•    Degree of freedom sets                                             •    Calculation of linear system response to
•    Basic equations                                                    •    Ergodic random excitation
•    Equations for transient response                                   •    Definition of multiple input-output spectral
•    Equations for frequency response                                   •    Relationship for a linear system
•    Modal reduction                                                    •    Random analysis as implemented in nx nastran
•    User interface                                                     •    Randps entry
•    The type field                                                     •    Tabrnd1 entry
•    Example: executive and case control decks                          •    Input required for random response analysis
•    Example: bulk data deck                                            •    Random analysis recommendations
•    Workshop #7 - direct transient response with                       •    Workshop #13 - random response with single input
•    Enforced acceleration                                              •    Workshop #14 - random response with
•    Workshop #8 – modal transient response                             •    Multiple inputs
•    With enforced acceleration
•    Workshop #9 - direct frequency
•    Response with enforced displacement
•    Workshop #10 - modal frequency
•    Response with enforced displacement



                         I-VTech Solutions Pte Ltd             www.inno-
                                                               www.inno-venture.com
Singapore - Blk 5012 Ang Mo Kio Avenue 5 #04-11 Techplace II Singapore 569876 Tel : 65-6484 8863 Fax : 65-6484 8861
JB - Suite 301 Level 3 Bangunan Ang No. 1 Jalan Jeram Taman Tasek 80200 Johor Bahru Tel : 607-2323 863 Fax : 607-2323 861
Penang - 18-35-C Menara Gurney Persiaran Gurney 10250 Penang Tel : 604-2289 863 Fax : 604-2289 861
           SIEMENS UGS NX NASTARN Training



NX NASTRAN Dynamic Analysis
                              Day 4                                                                   Day 4

Complex Eigenvalue Analysis                                             •    Qset
                                                                        •    Qset1
•    Complex eigenvalue analysis                                        •    Bset
•    Complex eigensolutions - theory                                    •    Bset1
•    Complex eigensolutions in nx nastran                               •    Cset
•    Input required for complex eigenanalysis                           •    Cset1
•    Workshop #12 - complex eigenanalysis                               •    Default cms method “fixed boundary” cms
                                                                        •    Solution by hand
Normal Mode Analysis Using Parts                                        •    Solution using nx nastran sol 103

Superelement                                                            •    Output from spring model cms run


•    What is a superelement?                                                                                                 YY- Stress PSD

•    How are parts superelement defined in nx nastran?
•    Sample problem - steel stamping
•    Model definition for sample problem
•    Sample problem - steel stamping superelement 1                                                                         RMS=19.7 MPa


•    Partitioned solutions
•    Theory of static condensation
•    Advantages of superelement analysis                                                        Dynamic Response
•    Disadvantages of superelement analysis
•    Conventional analysis
•    Superelement analysis
•    Superposition of partial solutions
•    Superelement reduction methods available in
•    Dynamic analysis
•    Degrees of reduction
•    Guyan or static reduction
•    Comparison of reduction methods
•    Advantages of each reduction method
•    Calculation of normal modes using
•    Static reduction only
•    Calculation of normal modes using
•    Dynamic reduction for superelements
•    Senqset
•    Spoint

                         I-VTech Solutions Pte Ltd             www.inno-
                                                               www.inno-venture.com
Singapore - Blk 5012 Ang Mo Kio Avenue 5 #04-11 Techplace II Singapore 569876 Tel : 65-6484 8863 Fax : 65-6484 8861
JB - Suite 301 Level 3 Bangunan Ang No. 1 Jalan Jeram Taman Tasek 80200 Johor Bahru Tel : 607-2323 863 Fax : 607-2323 861
Penang - 18-35-C Menara Gurney Persiaran Gurney 10250 Penang Tel : 604-2289 863 Fax : 604-2289 861
           SIEMENS UGS NX NASTARN Training



NX NASTRAN Dynamic Analysis
                              Day 4

Normal Modes of Preloaded
Structures

•    Normal modes with differential stiffness
•    Workshop #14 - normal modes with preload


Dynamic Design Optimization

•    What is “design optimization”?
•    Basic features implemented in nx nastran
                                                                                       700
•    Strengths of nx nastran structural optimization                                      700             Mode 1
                                                                                       600                  Mode
                                                                                                          Mode 2 1
•    Optimization capabilities supported                                                  600               Mode
                                                                                                          Mode 3 2
                                                                             Eigen Frequency Hz




                                                                                       500
•    Basic optimization problem statement                                                                   Mode
                                                                                                          Mode 4 3
                                                                          Eigen Frequency Hz




                                                                                          500
                                                                                       400                1P Mode 4
•    Design optimization in nx nastran                                                    400                1P
                                                                                       300
•    Commonly used optimization bulk data entries                                         300
                                                                                       200
•    Workshop #18 - optimization using normal modes                                       200
                                                                                       100
•    Direct specification of commonly used functions                                      100
                                                                                         0
•    Optimization example using frequency response                                         00             100    200     300     400     500 600    700
                                                                                                      0      100     Rotational Speed Hz 500
                                                                                                                    200     300     400         600    700
•    Optimization statement                                                                                             Rotational Speed Hz
•    Dynamic load input
•    Tabled4 entry for this sample
•    Dynamic response sensitivity
•    Description of the design model
                                                                                                                                                         Total RMS =      537.26
•    Workshop #19 - optimization using                                   1.0E+05                                                                                          537.92
                                                                                                                                                                          537.91

•    Frequency response
                                                                         1.0E+04
•    Results of optimization
•    Wheel response                                                      1.0E+03

•    Driver’s seat response
•    Conclusion                                                          1.0E+02



                                                                         1.0E+01



                                                                         1.0E+00



                                                                         1.0E-01
                                                                                                  1                     10                   100                       1001
                                                                                                                               FREQUENCY




                         I-VTech Solutions Pte Ltd             www.inno-
                                                               www.inno-venture.com
Singapore - Blk 5012 Ang Mo Kio Avenue 5 #04-11 Techplace II Singapore 569876 Tel : 65-6484 8863 Fax : 65-6484 8861
JB - Suite 301 Level 3 Bangunan Ang No. 1 Jalan Jeram Taman Tasek 80200 Johor Bahru Tel : 607-2323 863 Fax : 607-2323 861
Penang - 18-35-C Menara Gurney Persiaran Gurney 10250 Penang Tel : 604-2289 863 Fax : 604-2289 861

				
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