Patran for Advanced Users Exercise_18_Arbitrary_b

PATRAN302ExerciseWorkbook-Release8.018-1Lesson18LinearStaticAnalysisforaBeamofArbitraryCross-SectionPYXZObjectives:■Demonstratetheuseofbeamanalysisusinganarbitrarybeamcrosssection.■RunanMSC/NASTRANlinearstaticanalysis.■Createanaccuratedeformationplotofthemodel.■Analyzetheresults.18-2PATRAN302ExerciseWorkbook-Release8.0ModelDescription:Thefigurebelowshowsanarbitrarybeamcross-section.Thesectionpropertieswillbegiventoasimplelinemodelofacantileverbeam.Thebeamwillbefixedatoneendwhileatotalloadof100lbswillbeappliedattheotherend.Figure1.1displaystheschematicsofthearbitrarybeamcross-section.Table1.1belowdisplaysallthenecessarypropertiesofthemodel.Figure1.1-SchematicofanArbitraryBeamCrossSectionTable1.1-CantileverBeamPropertiesTotalLengthofBeam:1000inchesElasticModulus:30E+06psiPoissonRatio:0.33TotalForceonEndofBeam:100lbYXZ[90,25,0][90,5,0][125,5,0][125,-5,0][90,-5,0][90,-25,0][35,-25,0][40,-20,0][85,-20,0][40,20,0][85,20,0][35,25,0][35,5,0][35,5,0][0,5,0][0,-5,0]Lesson18ArbitraryBeamPATRAN302ExerciseWorkbook-Release8.018-3SuggestedExerciseSteps:■Createthemodelusingappropriategeometry.■Applyarbitrarybeampropertiestoacantileverbeam.■Preparethemodelforalinearstaticanalysis(SOL101).■GenerateaninputfileandsubmitittotheMSC/NASTRANsolverforalinearstaticanalysis.■Generateadeformation.■Reviewtheresults.18-4PATRAN302ExerciseWorkbook-Release8.0ExerciseProcedure:1.Createanewdatabasecalledprob1.db.IntheNewModelPreferenceformsetthefollowing:Wheneverpossibleclick❑AutoExecute(turnoff).Patranwillcalculatethepropertiesforanarbitrarycross-section.Thecross-sectioncanbedefinedbyatrimmedsurface,andthetrimmedsurfacecaneitherbeimported(throughIgesforexample)oritcanbecreateddirectlyinPatran.Forthisexamplewearegoingtoactuallycreatethetrimmedsurfacethatrepresentsourcross-section.2.Createthecross-sectiongeometry.Startwiththeoutercurvesofthecross-sectionfirst.File/New...NewDatabaseNameprob1OKTolerance:◆DefaultAnalysisCode:MSC/NASTRANAnalysisType:StructuralOK◆GeometryAction:CreateObject:PointMethod:XYZPointCoordinatesList[0,5,0]ApplyPointCoordinatesList[0,-5,0]ApplyLesson18ArbitraryBeamPATRAN302ExerciseWorkbook-Release8.018-5Tobetterviewthepointsjustcreatedclickonthefollowing:Continuethesameprocedurefortheremainingpointsofthegeometryusingthefollowingtableasaguide.Table1.2-PointCoordinatesListforBeamCross-SectionYouwillneedtoclickontheiconbelowtoaidincreatingthenecessarycurves.Nowcreatethecurvesusingthepreviouslycreatedpoints.PointIDPointCoordinatesPointIDPointCoordinates3[35,-5,0]10[90,25,0]4[35,-25,0]11[35,25,0]5[90,-25,0]12[35,5,0]6[90,-5,0]13[40,20,0]7[125,-5,0]14[40,-20,0]8[125,5,0]15[85,-20,0]9[90,5,0]16[85,20,0]◆GeometryAction:CreateObject:CurveMethod:PWLPointListPoint1:12,1ApplyPointListPoint13:16,13ApplyPointSizeShowLabels18-6PATRAN302ExerciseWorkbook-Release8.0Yourresultingcrosssectiongeometryonyourscreenshouldlooksimilartothefollowingfigure.Figure1.2-ConnectivitiesofCross-SectionNowcreatetheinnerandoutercurveloopsofthecross-sectionbyusingtheChainmethod.Whenamessageboxappearsandasksifyouwishtodeletetheoriginalcurves,clickonYes.◆GeometryAction:CreateObject:CurveMethod:Chain■DeleteConstituentCurvesCurveListCurve1:12Apply(Selecttheoutercurvesofcrosssection.)YesCurveListCurve13:16Apply(Selecttheinnercurvesofcrosssection.)Y1234567891011121314151612345678910111213141516XZLesson18ArbitraryBeamPATRAN302ExerciseWorkbook-Release8.018-7Whenamessageboxappearsandasksifyouwishtodeletetheoriginalcurves,clickonYes.TocreateasurfaceoutofthecurvesyouwillhavetousetheTrimmedmethod.Whenamessageboxappearsandasksifyouwishtodeletetheoriginalcurves,clickonYesforeachloop.Turnoffthelabelsanddecreasethepointsizebyclickingthefollowing,respectively.Forclarity,createagroupforthefinishedcross-sectionrepresentation.Yes◆GeometryAction:CreateObject:SurfaceMethod:TrimmedOption:Planar■UseAllEdgeVertices■DeleteOuterLoopOuterLoopListCurve17■DeleteInnerLoopsInnerLoopListCurve18ApplyYesYesGroup/Create...Action:CreatePointSizeHideLabels18-8PATRAN302ExerciseWorkbook-Release8.0Nowwewillcreatetheactualcantileverbeamthatwearegoingtoanalyze.Thebeamisgoingtobemodeledby1Delements,andtodothiswearegoingtomeshalineentity.3.Createthematerialpropertyforthemodel.NewGroupNamecross_section■MakeCurrentGroupContents:AddEntitySelectionEntitySelectionSurface1Apply(Selectthecrosssectionsurface.)Cancel◆GeometryAction:CreateObject:CurveMethod:XYZRefer.CoordinateFrameCoord0VectorCoordinatesList1000,0,0OriginCoordinatesList[0,50,0]◆MaterialsAction:CreateObject:IsotropicMethod:ManualInputMaterialNamemat_1InputProperties...ElasticModulus=30E6PoissonRatio=0.33ApplyCancelLesson18ArbitraryBeamPATRAN302ExerciseWorkbook-Release8.018-94.Createtheelementpropertyforthemodelbyusingthearbitrarybeamcross-section.Whenamessageboxappearsandasksifyouwishtocontinuewiththe“AssociateBeamSection”toggleon,clickonYes.Toassociateourarbitrarybeamcross-sectiontoourlinecurveyoumustfirstclickonthefollowingicon.Thesurfaceyouselectisthesurfacethatrepresentstheactualcross-section(thetrimmedsurfacecreatedinStep2).◆PropertiesActio