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Generative Dynamic Response Analysis
CATIA V5 Training
Exercises
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Generative Dynamic
Response Analysis
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Version 5 Release 19
September 2008
EDU_CAT_EN_GDY_FX_V5R19
Student Notes:
Generative Dynamic Response Analysis
Student Notes:
Table of Contents
Master Exercise: Transient Dynamic Analysis
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Hood Analysis Presentation
Transient Dynamic Analysis: Computing a Static Analysis on ...
Transient Dynamic Analysis: Computing the Frequency Analy...
Transient Dynamic Analysis: Defining the Transient Dynamic...
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10
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Generative Dynamic Response Analysis
Master Exercise: Transient Dynamic
Analysis
You will practice concepts learned throughout the course by building the
master exercise and following the recommended process
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Hood Analysis Presentation
Transient Dynamic Analysis: Computing a Static Analysis on
the Hood
Transient Dynamic Analysis: Computing the Frequency
Analysis on a Hood
Transient Dynamic Analysis: Defining the Transient Dynamic
Case on a Hood
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Generative Dynamic Response Analysis
Exercise
P2
Exercises marked with this
callout will work in P2
configuration only
Transient Dynamic Analysis: Presentation
60 min
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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.
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Generative Dynamic Response Analysis
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 case
Define and compute the frequency case
Define and Compute the Transient Dynamic Response Analysis
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The mesh and the modulation file are provided
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Generative Dynamic Response Analysis
Student Notes:
Design Process: Dynamic Analysis on a Hood
1
Define and Compute the
Static Response
Analysis
20’
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Define and Compute the
Frequency Response
analysis
10’
Define the Transient Dynamic
analysis and Visualization
Results
30’
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3
2
Generative Dynamic Response Analysis
Transient Dynamic Analysis
Step 1 - Computing a Static Analysis on the hood
20 min.
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In this step you will :
Complete a Static Case Analysis
Apply Loads
Define Restraints
Compute the Static Case
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Generative Dynamic Response Analysis
Student Notes:
Do It Yourself (1/2)
Part used: Transient_dyn_analysis_step1.CATAnalysis
Load the pre-meshed hood
In the pre-define Static Case:
Apply Restraints using Advanced Restraints tool
Restraint the 2 hinge holes
Mesh part: All
Fix every translations (1,2,3)
Fix rotation 1 and 3
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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
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Bottom View
Top View
Generative Dynamic Response Analysis
Do It Yourself (2/2)
Defining Loads: apply a Distributed Force
Support: The 2 borders faces
(highlighted-see below)
Mesh part: All
Axis system type: Global
Force Vector:
X = 5N
Y = 0N
Z = 8.66N
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Compute the static Case
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Generative Dynamic Response Analysis
Transient Dynamic Analysis
Step 2 - Computing the Frequency Analysis on a hood
10 min.
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In this step you will :
Define a Frequency Case
Reuse the static restraints
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Generative Dynamic Response Analysis
Do It Yourself
Part used: Transient_dyn_analysis_step2.CATAnalysis
Define a new Frequency Case
Refer the previously defined static case
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Compute the 20 first modes
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Generative Dynamic Response Analysis
Transient Dynamic Analysis
Step 3 - Computing the Transient Dynamic Case
30 min.
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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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Generative Dynamic Response Analysis
Do It Yourself (1/2)
Part used: Transient_dyn_analysis_step3.CATAnalysis
Define a transient dynamic case
Refer the frequency case previously defined
Define the modulation
Import the Time Modulation Excel file that will simulate the choc
Visualize the modulation
Define the Damping
Define a modal Damping
The critical damping ratio must be equal to 1% for every nodes
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Define the Load Excitation Set
Use the Distributed Force.1 defined in the Static Case
Select the modulation file you have just defined
Selected Factor: 50
Time Sampling
Define it from 0s to 0.5s, 250 steps
Compute the Transient dynamic Case
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Generative Dynamic Response Analysis
Do It Yourself (2/2)
Part used: Transient_dyn_analysis_step3.CATAnalysis
Visualizing Results
Displacements:
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
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2D Display
Visualize the graphical representation of the displacements
(Tx,Ty,Tz) of the node at which maxima located
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Student Notes:
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