2d bridge structure
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8/13/2019 2D Bridge Structure
1/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 1 PortlandStateUniversity,MechanicalEngineering
Abaqus/CAE(ver.6.9)VibrationsTutorialProblemDescription
Thetwodimensionalbridgestructure,whichconsistsofsteelTsections,issimplysupportedatitslowercorners.
Determinethefirst10eigenvaluesandnaturalfrequencies.
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8/13/2019 2D Bridge Structure
2/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 2 PortlandStateUniversity,MechanicalEngineering
AnalysisSteps1. StartAbaqusandchoosetocreateanewmodeldatabase2. InthemodeltreedoubleclickonthePartsnode(orrightclickonpartsandselectCreate)
3. IntheCreatePartdialogbox(shownabove)namethepartanda. Select2DPlanarb. SelectDeformablec. SelectWired. Setapproximatesize=20e. ClickContinue
4. Createthegeometryshownbelow(notdiscussedhere)
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8/13/2019 2D Bridge Structure
3/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 3 PortlandStateUniversity,MechanicalEngineering
5. DoubleclickontheMaterialsnodeinthemodeltree
a. Namethenewmaterialandgiveitadescriptionb. ClickontheMechanicaltabElasticityElasticc. DefineYoungsModulusandPoissonsRatio(useSIunits)
i. WARNING: TherearenopredefinedsystemofunitswithinAbaqus,sotheuserisresponsibleforensuringthatthecorrectvaluesarespecified
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8/13/2019 2D Bridge Structure
4/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 4 PortlandStateUniversity,MechanicalEngineering
d. ClickontheGeneraltabDensitye. Density=7800f. ClickOK
6. DoubleclickontheProfilesnodeinthemodeltreea. NametheprofileandselectTfortheshape
i. NotethattheTshapeisoneofseveralpredefinedcrosssectionsb. ClickContinuec. Enterthevaluesfortheprofileshownbelowd. ClickOK
7. DoubleclickontheSectionsnodeinthemodeltreea. NamethesectionBeamPropertiesandselectBeamforboththecategoryandthetypeb. ClickContinuec. LeavethesectionintegrationsettoDuringAnalysisd. Selecttheprofilecreatedabove(TSection)e. Selectthematerialcreatedabove(Steel)f. ClickOK
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8/13/2019 2D Bridge Structure
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ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 5 PortlandStateUniversity,MechanicalEngineering
8. ExpandthePartsnodeinthemodeltree,expandthenodeofthepartjustcreated,anddoubleclickonSectionAssignments
a. Selecttheentiregeometryintheviewportb. Selectthesectioncreatedabove(BeamProperties)c. ClickOK
9. ExpandtheAssemblynodeinthemodeltreeandthendoubleclickonInstancesa. SelectDependentfortheinstancetypeb. ClickOK
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8/13/2019 2D Bridge Structure
6/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 6 PortlandStateUniversity,MechanicalEngineering
10.DoubleclickontheStepsnodeinthemodeltreea. Namethestep,settheproceduretoLinearperturbation,andselectFrequencyb. ClickContinuec. Givethestepadescriptiond. SelecttheradiobuttonValueunderNumberofeigenvaluesrequestedandenter 10e. ClickOK
11.DoubleclickontheBCsnodeinthemodeltreea. NametheboundaryconditionedPinnedandselectDisplacement/Rotationforthetypeb. ClickContinuec. SelectthelowerleftvertexofthegeometryandpressDoneinthepromptaread. ChecktheU1andU2displacementsandsetthemto0e. ClickOK
f. Repeatforthelowerrightvertex,butmodelarollerrestraint(onlyU2fixed)instead
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8/13/2019 2D Bridge Structure
7/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 7 PortlandStateUniversity,MechanicalEngineering
12. InthemodeltreedoubleclickonMeshfortheBridgepart,andinthetoolboxareaclickontheAssignElementTypeicon
a. SelectStandardforelementtypeb. SelectLinearforgeometricorderc. SelectBeamforfamilyd. Notethatthenameoftheelement(B21)anditsdescriptionaregivenbelowtheelementcontrolse. ClickOK
13. InthetoolboxareaclickontheSeedEdge:ByNumbericon(holddownicontobringuptheotheroptions)
a. SelecttheentiregeometryandclickDoneinthepromptareab. Definethenumberofelementsalongtheedgesas5
14. InthetoolboxareaclickontheMeshParticona. ClickYesinthepromptarea
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8/13/2019 2D Bridge Structure
8/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 8 PortlandStateUniversity,MechanicalEngineering
15. InthemenubarselectViewPartDisplayOptionsa. ChecktheRenderbeamprofilesoptionb. ClickOK
16.ChangetheModuletoPropertya. ClickontheAssignBeamOrientationiconb. Selecttheentiregeometryfromtheviewportc. ClickDoneinthepromptaread. Acceptthedefaultvalueoftheapproximaten1direction
17.Notethatthepreviewshowsthatthebeamcrosssectionsarenotallorientatedasdesired(seeProblemDescription)
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8/13/2019 2D Bridge Structure
9/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 9 PortlandStateUniversity,MechanicalEngineering
18. InthetoolboxareaclickontheAssignBeam/TrussTangenticona. Clickonthesectionsofthegeometrythatareoffby180degrees
19. InthemodeltreedoubleclickontheJobnodea. NamethejobBridgeb. ClickContinuec. Givethejobadescriptiond. ClickOK
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8/13/2019 2D Bridge Structure
10/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 10 PortlandStateUniversity,MechanicalEngineering
20. Inthemodeltreerightclickonthejobjustcreated(Bridge)andselectSubmita. WhileAbaqusissolvingtheproblemrightclickonthejobsubmitted(Bridge),andselectMonitor
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8/13/2019 2D Bridge Structure
11/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 11 PortlandStateUniversity,MechanicalEngineering
b. IntheMonitorwindowcheckthattherearenoerrorsorwarningsi. Ifthereareerrors,investigatethecause(s)beforeresolvingii. Iftherearewarnings,determineifthewarningsarerelevant,somewarningscanbesafely
ignored
21. Inthemodeltreerightclickonthesubmittedandsuccessfullycompletedjob(Bridge),andselectResults
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8/13/2019 2D Bridge Structure
12/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 12 PortlandStateUniversity,MechanicalEngineering
22. InthemenubarclickonViewportViewportAnnotationsOptionsa. UnchecktheShowcompassoptionb. ThelocationsofviewportitemscanbespecifiedonthecorrespondingtabintheViewportAnnotations
Options
c. ClickOK
23.Displaythedeformedcontouroverlaidwiththeundeformedgeometrya. Inthetoolboxareaclickonthefollowingicons
i. PlotContoursonDeformedShapeii. AllowMultiplePlotStatesiii. PlotUndeformedShape
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8/13/2019 2D Bridge Structure
13/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 13 PortlandStateUniversity,MechanicalEngineering
24. InthetoolboxareaclickontheCommonPlotOptionsicona. NotethattheDeformationScaleFactorcanbesetontheBasictabb. OntheLabelstabchecktheshownodesymbolsiconc. ClickOK
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8/13/2019 2D Bridge Structure
14/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 14 PortlandStateUniversity,MechanicalEngineering
25. InthemenubarclickonResultsStep/Framea. ChangethemodebydoubleclickingintheFrameportionofthewindowb. Observetheeigenvaluesandfrequenciesc. ClickOK
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8/13/2019 2D Bridge Structure
15/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 15 PortlandStateUniversity,MechanicalEngineering
26. InthetoolboxareaclickonAnimationOptionsa. ChangetheModetoSwingb. ClickOKc. AnimatebyclickingonAnimate: ScaleFactoriconinthetoolboxaread. Stoptheanimationbyclickingontheiconagain
27.ClickontheNextarrowonthecontextbartochangethemode
28.ExpandtheBridge.odbnodeintheresulttree,expandtheHistoryOutputnode,andrightclickonEigenfrequency:
a. SelectSaveAsb. Name=Frequencies
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8/13/2019 2D Bridge Structure
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ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010HormozZareh&JaysonMartinez 16 PortlandStateUniversity,MechanicalEngineering
c. RepeatforEigenvalued.
Observe
the
XYData
nodes
in
the
result
tree
29. InthemenubarclickonReportXY
a. Selectfrom=AllXYdatab. HighlightEigenvaluesc. ClickontheSetuptabd. ClickSelectandspecifythedesirednameandlocationofthereporte. ClickApplyf. ClickontheXYDatatabg. HighlightFrequenciesh. ClickOK
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8/13/2019 2D Bridge Structure
17/17
ME455/555IntrotoFiniteElementAnalysis Winter10 Abaqus/CAEVibrationstutorial
2010 Hormoz Zareh & Jayson Martinez 17 Portland State University Mechanical Engineering
30.Openthereport(.rptfile)withanytexteditor
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