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Generative Dynamic Response Analysis
CATIA V5 TrainingExercises
Version 5 Release 19September 2008
EDU_CAT_EN_GDY_FX_V5R19
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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
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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
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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
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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
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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’
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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
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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
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Do It Yourself (2/2)
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
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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
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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
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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
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Do It Yourself (1/2)
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
Part used: Transient_dyn_analysis_step3.CATAnalysis
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Do It Yourself (2/2)
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
Part used: Transient_dyn_analysis_step3.CATAnalysis