generative dynamic response analysis - freeyvonet.florent.free.fr/serveur/cours catia/catia a… ·...

Student Notes:

Generative Dynamic Response Analysis��

Copyright DASSAULT SYSTEMES �

Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Generative Dynamic Response Analysis

CATIA V5 TrainingExercises

Version 5 Release 19September 2008

EDU_CAT_EN_GDY_FX_V5R19

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Table of Contents

Master Exercise: Transient Dynamic Analysis 3Hood Analysis Presentation 4Transient Dynamic Analysis: Computing a Static Analysis on ... 7Transient Dynamic Analysis: Computing the Frequency Analy... 10Transient Dynamic Analysis: Defining the Transient Dynamic... 12

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Master Exercise: Transient DynamicAnalysisYou will practice concepts learned throughout the course by building the master exercise and following the recommended process

Hood Analysis PresentationTransient Dynamic Analysis: Computing a Static Analysis on

the HoodTransient Dynamic Analysis: Computing the Frequency

Analysis on a HoodTransient Dynamic Analysis: Defining the Transient Dynamic

Case on a Hood

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Exercise Transient Dynamic Analysis: Presentation

60 min

You will compute a Transient Dynamic Analysis to simulate a chock on a hood.You will be able to visualize stress and displacements versus time.

P2 Exercises marked with this callout will work in P2 configuration only

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Design Intent: Dynamic Analysis on a Hood

You will compute a Transient Dynamic Analysis by defining a load excitation on a hood. You will have to compute successively a static analysis, a frequency analysis and to finish, the dynamic response analysis. Restraints are fixed. The modulation will be applied on loads

This exercise is composed of 3 main steps:

Define and compute the static caseDefine and compute the frequency caseDefine and Compute the Transient Dynamic Response Analysis

The mesh and the modulation file are provided

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Define and Compute the Frequency Response

analysis

Define and Compute the Static Response

Analysis

1

2

Design Process: Dynamic Analysis on a Hood

20’

10’

Define the Transient Dynamic analysis and Visualization

Results

3

30’

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Transient Dynamic AnalysisStep 1 - Computing a Static Analysis on the hood

20 min.

In this step you will :Complete a Static Case AnalysisApply LoadsDefine RestraintsCompute the Static Case

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Do It Yourself (1/2)

Load the pre-meshed hood

In the pre-define Static Case:

Apply Restraints using Advanced Restraints toolRestraint the 2 hinge holes� Mesh part: All� Fix every translations (1,2,3) � Fix rotation 1 and 3

Restraint the front of the hood� Mesh part: All� Under the front hood, select the 2 inner edges of the holes ( see below) � Use a “User” Axis system: Axis System.1� Local Orientation: Cartesian� Fix the translation 2 only

Top View

Bottom View

Part used: Transient_dyn_analysis_step1.CATAnalysis

Student Notes:


Copyright DASSAULT SYSTEMES

Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S


Defining Loads: apply a Distributed Force

Support: The 2 borders faces (highlighted-see below)Mesh part: AllAxis system type: GlobalForce Vector:

X = 5NY = 0NZ = 8.66N

Compute the static Case

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Transient Dynamic AnalysisStep 2 - Computing the Frequency Analysis on a hood

10 min.

In this step you will :Define a Frequency Case Reuse the static restraints

Student Notes:


Copyright DASSAULT SYSTEMES ��

Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Do It YourselfPart used: Transient_dyn_analysis_step2.CATAnalysis

Define a new Frequency Case

Refer the previously defined static case

Compute the 20 first modes

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S

Transient Dynamic AnalysisStep 3 - Computing the Transient Dynamic Case

30 min.

In this step you will :Define a Transient dynamic case using the static and frequency cases previously defined.Visualize the results

Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S


Define a transient dynamic case

Refer the frequency case previously defined

Define the modulation Import the Time Modulation Excel file that will simulate the chocVisualize the modulation

Define the DampingDefine a modal DampingThe critical damping ratio must be equal to 1% for every nodes

Define the Load Excitation SetUse the Distributed Force.1 defined in the Static CaseSelect the modulation file you have just definedSelected Factor: 50

Time SamplingDefine it from 0s to 0.5s, 250 steps

Compute the Transient dynamic Case


Student Notes:



Cop

yrig

ht D

AS

SA

ULT

SY

STE

ME

S


Visualizing ResultsDisplacements:� Visualize the displacements for t(s) = 0.1s� Animate the displacements for all occurrences

Search Extrema� For the occurrence 100, localize the area where displacements are maximum

2D Display� Visualize the graphical representation of the displacements

(Tx,Ty,Tz) of the node at which maxima located


generative dynamic response analysis - freeyvonet.florent.free.fr/serveur/cours catia/catia a… ·...

Documents