course in ansys - aalborg universitethomes.civil.aau.dk/shl/ansysc/ansys-example0410.pdf ·...
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Course in ANSYS
Example0410
Computational Mechanics, AAU, EsbjergANSYS
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Example – Frame 2DObjective:Compute the harmonic response Tasks:Perform a modal analysisDisplay the mode shapesPerform a harmonic analysisTopics:Topics: Start of analysis, Element type,Real constants, Material, modeling, ele-ment size for beam models, modal and harmonic analysis
E = 200E9N/m2
n = 0.3L = 2mH = 3mI = 0.14/12m4
r = 7860kg/m3
Example0410 2Computational Mechanics, AAU, EsbjergANSYS
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Example - titleUtility Menu > File > Change Jobname/jobname, Example0410 Command line entry
GUI
Enter: Example0410
Utility Menu > File > Change Title/title, Frame 2D
Enter: Frame 2D
Example0410 3Computational Mechanics, AAU, EsbjergANSYS
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Example - Parameters
Example0410 4Computational Mechanics, AAU, EsbjergANSYS
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Example - KeypointsPreprocessor > Modeling > Create > Keypoints > In Active CS/PREP7K,,,,K,,,3,K,,2,3,
General format:K,#,X,Y,Z
# Keypoint numberX Keypoint x-coordinateY Keypoint y-coordinateZ Keypoint z-coordinate
Note: An empty #result in automaticnumbering.
Enter 0,0,0 andPress ApplyEnter 0,3,0 andPress ApplyEnter 2,3,0 andPress Apply
Example0410 5Computational Mechanics, AAU, EsbjergANSYS
Note: An empty boxresult in a zero. It isallowed to enter 0.0in each box.
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Example - NumberingSwitch on Keypoint numbersUtility Menu > PlotCtrls > Numbering
Example0410 6Computational Mechanics, AAU, EsbjergANSYS
Press OK
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Example - LinesPreprocessor > Modeling > Create > Lines > Lines > Straight LineCreate a line between KP1 and KP2 and KP2 and KP3.L,1,2L,2,3
Example0410 7Computational Mechanics, AAU, EsbjergANSYS
HINT: By clicking with the right-hand mouse button you shift between the Pick/Unpick function. This is indicated by the direction of the cursor arrow:
Pick: upward arrow
Unpick: downward arrow
Press OK or Cancelto finish selection
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Example - Plot - Nodes
Plot Keypoints and Lines
Example0410 8Computational Mechanics, AAU, EsbjergANSYS
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Example – Element TypePreprocessor > Element Type > Add/Edit/Delete
Press Add
Example0410 9Computational Mechanics, AAU, EsbjergANSYS
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Example - Element TypePreprocessor > Element Type > Add/Edit/Delete
Press Options
Example0410 10Computational Mechanics, AAU, EsbjergANSYS
Press Help to learn more about theelement.
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Example – Real ConstantsPreprocessor > Real Constants > Add
Place the cursoron the relevantelement andpress OK
Example0410 11Computational Mechanics, AAU, EsbjergANSYS
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Example - Real ConstantsPreprocessor > Real Constants > Add
Press OK
Press Closeto finish
Enter cross sectional data
Example0410 12Computational Mechanics, AAU, EsbjergANSYS
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Example - Material PropertiesPreprocessor > Material Props > Material Models
Double Clickto step in thematerial tree
Example0410 13Computational Mechanics, AAU, EsbjergANSYS
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Example - Material Properties
Example0410 14Computational Mechanics, AAU, EsbjergANSYS
Preprocessor > Material Props > Material ModelsEnter EModulus of elasticity
Enter nuPoisson’s ratio
Click hereto Close
Press OK
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Example - Density
Enter 7830
Press OKExample0410 15
Computational Mechanics, AAU, EsbjergANSYS
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Example - MeshingPreprocessor > Meshing > Size Cntrls > ManualSize > Lines > Picked Lines
Example0410 16Computational Mechanics, AAU, EsbjergANSYS
Select/Pick L1
Press OK when finish with selection Enter 30
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Example - MeshingPreprocessor > Meshing > Size Cntrls > ManualSize > Lines > Picked Lines
Example0410 17Computational Mechanics, AAU, EsbjergANSYS
Select/Pick L2
Press OK when finish with selection Enter 20
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Example - MeshingPreprocessor > Meshing > Mesh > Lines
Select individual lines to be meshed by Picking
Example0410 18Computational Mechanics, AAU, EsbjergANSYS
Select all lines defined to be meshed
NB: It is often necessary to “Clear” the model forexample if Element Type is to be changed
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Example – Analysis Type
Solution > Analysis Type > New Analysis
File > Write DB log fileEnter “example0410.lgw”
Press OK
Example0410 19Computational Mechanics, AAU, EsbjergANSYS
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Example0410 20Computational Mechanics, AAU, EsbjergANSYS
Example – MA Analysis OptionsSelect Block Lanczos
Enter 10
Enter 10Switch to Yes
Press OK
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Example – MA Analysis Options
Press OK
Example0410 21Computational Mechanics, AAU, EsbjergANSYS
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Displacement > On Keypoints
Select keypoint 1
Select UX and UY equal zero
Press OK
Example0410 22Computational Mechanics, AAU, EsbjergANSYS
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Displacement > On Keypoints
Select keypoint 2
Select UY equal zero
Press OK
Example0410 23Computational Mechanics, AAU, EsbjergANSYS
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Example0410 24Computational Mechanics, AAU, EsbjergANSYS
Example - Damping
Enter 0.02 for Constant damping ratio
Press OK
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Example - SolveSolution > Solve > Current LS
Example0410 25Computational Mechanics, AAU, EsbjergANSYS
Press OK
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Example - SolvePress Close
Press hereto Close
Example0410 26Computational Mechanics, AAU, EsbjergANSYS
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Example - PostProcessingGeneral Postproc > Plot Results > Deformed Shape
Select “Def+undeformed”and Press OK
Example0410 27Computational Mechanics, AAU, EsbjergANSYS
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Example – Results Summary
Example0410 28Computational Mechanics, AAU, EsbjergANSYS
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Example – Read Results
Example0410 29Computational Mechanics, AAU, EsbjergANSYS
General Postproc > Plot Results > Deformed Shape
Select “Def+undeformed”and Press OK
Read first set
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Example – Mode 1
Example0410 30Computational Mechanics, AAU, EsbjergANSYS
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Example0410 31Computational Mechanics, AAU, EsbjergANSYS
Example – Result viewer
Select mode shape, the last mode read is displayed
Press OK
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Example – Result viewerSelect DOF solution and Def+undeformed
Press OK and animation is controlled by the following dialog
Example0410 32Computational Mechanics, AAU, EsbjergANSYS
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Example0410 33Computational Mechanics, AAU, EsbjergANSYS
Example – Read Results
Enter 3 and compare with CookPress OK
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Example - List
Example0410 34Computational Mechanics, AAU, EsbjergANSYS
Press OK Select
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Example - List
Compare result with Cook
Example0410 35Computational Mechanics, AAU, EsbjergANSYS
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Example – Analysis Type
Solution > Analysis Type > New Analysis
File > Write DB log fileEnter “example0410.lgw”
Press OK
Example0410 36Computational Mechanics, AAU, EsbjergANSYS
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Example0410 37Computational Mechanics, AAU, EsbjergANSYS
Example – HRA Analysis OptionsSelect Full
Select Amplitud+phase
Press OK
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Force/Moment > On Keypoints
Example0410 38Computational Mechanics, AAU, EsbjergANSYS
Select keypoint 3
Change to FX
Press OK to finish Enter 3000
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Example0410 39Computational Mechanics, AAU, EsbjergANSYS
Example - Freq and SubstpsEnter 50
Enter 160
Enter 110
Select Stepped
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Example0410 40Computational Mechanics, AAU, EsbjergANSYS
Example - Damping
Enter 0.02 for Constant damping ratio
Press OK
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Example - SolveSolution > Solve > Current LS
Example0410 41Computational Mechanics, AAU, EsbjergANSYS
Press OK
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Example - SolvePress Close
Example0410 42Computational Mechanics, AAU, EsbjergANSYS
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Example0410 43Computational Mechanics, AAU, EsbjergANSYS
Example – TimeHistory Postpro
Close this dialog box
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Example0410 44Computational Mechanics, AAU, EsbjergANSYS
Example – Define Variables
Press Add
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Example – Add Time-History Var.
Example0410 45Computational Mechanics, AAU, EsbjergANSYS
Select Nodal DOF result
Press OK
Enter 17
Press OK
Select DOF solution and Translation UX
Press OK
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Example – Graph Variables
Example0410 46Computational Mechanics, AAU, EsbjergANSYS
Enter 2 to plot UX for node 17
Press OK
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Example – Graph Variables
Example0410 47Computational Mechanics, AAU, EsbjergANSYS