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Generative Dynamic Response Analysis CATIA V5 Training Exercises Copyright DASSAULT SYSTEMES Generative Dynamic Response Analysis Copyright DASSAULT SYSTEMES 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 Copyright DASSAULT SYSTEMES 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... Copyright DASSAULT SYSTEMES 3 4 7 10 12 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 Copyright DASSAULT SYSTEMES 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 Copyright DASSAULT SYSTEMES Student Notes: Generative Dynamic Response Analysis Exercise P2 Exercises marked with this callout will work in P2 configuration only Transient Dynamic Analysis: Presentation 60 min Copyright DASSAULT SYSTEMES 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. Copyright DASSAULT SYSTEMES Student Notes: 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 Copyright DASSAULT SYSTEMES The mesh and the modulation file are provided Copyright DASSAULT SYSTEMES Student Notes: Generative Dynamic Response Analysis Student Notes: Design Process: Dynamic Analysis on a Hood 1 Define and Compute the Static Response Analysis 20’ Copyright DASSAULT SYSTEMES Define and Compute the Frequency Response analysis 10’ Define the Transient Dynamic analysis and Visualization Results 30’ Copyright DASSAULT SYSTEMES 3 2 Generative Dynamic Response Analysis Transient Dynamic Analysis Step 1 - Computing a Static Analysis on the hood 20 min. Copyright DASSAULT SYSTEMES In this step you will : Complete a Static Case Analysis Apply Loads Define Restraints Compute the Static Case Copyright DASSAULT SYSTEMES Student Notes: 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 Copyright DASSAULT SYSTEMES 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 Copyright DASSAULT SYSTEMES 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 Copyright DASSAULT SYSTEMES Compute the static Case Copyright DASSAULT SYSTEMES Student Notes: Generative Dynamic Response Analysis Transient Dynamic Analysis Step 2 - Computing the Frequency Analysis on a hood 10 min. Copyright DASSAULT SYSTEMES In this step you will : Define a Frequency Case Reuse the static restraints Copyright DASSAULT SYSTEMES Student Notes: 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 Copyright DASSAULT SYSTEMES Compute the 20 first modes Copyright DASSAULT SYSTEMES Student Notes: Generative Dynamic Response Analysis Transient Dynamic Analysis Step 3 - Computing the Transient Dynamic Case 30 min. Copyright DASSAULT SYSTEMES In this step you will : Define a Transient dynamic case using the static and frequency cases previously defined. Visualize the results Copyright DASSAULT SYSTEMES Student Notes: 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 Copyright DASSAULT SYSTEMES 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 Copyright DASSAULT SYSTEMES Student Notes: 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 Copyright DASSAULT SYSTEMES 2D Display Visualize the graphical representation of the displacements (Tx,Ty,Tz) of the node at which maxima located Copyright DASSAULT SYSTEMES Student Notes: