hyperworks模态分析实例教程

NormalModesAnalysisofaSplashShield-RD-1020Inthistutorial,anexistingfiniteelementmodelofanautomotivesplashshieldwillbeusedtodemonstratehowtosetupandperformanormalmodesanalysis.HyperMeshpost-processingtoolsareusedtodeterminemodeshapesofthemodel.Thefollowingexercisesareincluded:Step1:LaunchHyperMeshandsettheRADIOSS(BulkData)UserProfileAUserProfiles…GraphicUserInterface(GUI)willappear.Ifitdoesnotappear,gotoPreferences►UserProfiles…fromthemenuonthetop.ThisloadstheUserProfile.Itincludestheappropriatetemplate,macromenu,andimportreader,paringdownthefunctionalityofHyperMeshtowhatisrelevantforgeneratingmodelsinBulkDataFormatforRADIOSSandOptiStruct.Step2:ImportaFiniteElementModelFileinHyperMeshAnImport…tabisaddedtoyourtabmenu.ASelectRADIOSS(BulkData)filebrowserwillpopup.Step3:ReviewRigidElementsNoticetherearetworigidspidersinthemodel.Theyareplacedatlocationswheretheshieldisbolteddown.Thisisasimplifiedrepresentationoftheinteractionbetweentheboltsandtheshield.Itisassumedthattheboltsaresignificantlymorerigidincomparisontotheshield.Thedependentnodesoftherigidelementshaveallsixdegreesoffreedomconstrained.Therefore,eachspiderconnectsnodesoftheshellmeshtogetherinsuchawaythattheydonotmovewithrespecttooneanother.•RetrievingtheRADIOSSinputfile•SettingupthemodelinHyperMesh•ApplyingLoadsandBoundaryConditionstotheModel•Submittingthejob•Viewingtheresults1.LaunchHyperMesh.2.SelectRADIOSSintheUserProfiledialog.3.Fromtheextendedlist,selectBulkData.4.ClickOK.1.FromtheFilepull-downmenuonthetoolbar,selectImport….2.ClicktoimportanFEmodel.3.FortheFiletype:,selectRADIOSS(BulkData).4.SelecttheFilesiconbutton.5.Browseforsshield.femfilelocatedintheHyperWorksinstallationdirectoryunderinstall_directory/tutorials/hwsolvers/radioss/andselectthefile.6.ClickOpen►Import.7.ClickClosetoclosetheImporttabmenu.Page1of6RADIOSS,MotionSolve,andOptiStructTutorialsRADIOSSBasicSmallDispla...2013-3-28file://C:\Altair\hw10.0\help\hwsolvers\rd1020.htmThefollowingstepsshowhowtoreviewthepropertiesoftherigidelements.Inthegraphicswindow,HyperMeshdisplaystheIDsoftherigidelementandthetwoendnodesandindicatestheindependentnodewithan'I'andthedependentnodewitha'D'.HyperMeshalsoindicatestheconstraineddegreesoffreedomfortheselectedelement,throughthedofcheckboxesintherigidspanel.Allrigidelementsinthismodelshouldhavealldofsconstrained.Step4:SettinguptheMaterialandGeometricPropertiesTheimportedmodelhasthreecomponentcollectorswithnomaterials.Amaterialcollectorneedstobecreatedandassignedtotheshellcomponentcollectors.Therigidelementsdonotneedtobeassignedamaterial.Shellthicknessvaluesalsoneedtobecorrected.TheMAT1cardimagepopsup.Ifaquantityinbracketsdoesnothaveavaluebelowit,itisoff.Tochangethis,clickthequantityinbracketsandanentryfieldwillappearbelowit.Clickintheentryfield,andavaluecanbeentered.Anewmaterial,steel,hasnowbeencreated.ThematerialusesRADIOSSlinearisotropicmaterialmodel,MAT1.ThismaterialhasaYoung'sModulusof2E+05,aPoisson'sRatioof0.3andamaterialdensityof7.85E-09.Amaterialdensityisrequiredforthenormalmodessolutionsequence.AtanytimethecardimageforthiscollectorcanbemodifiedusingCardEditor.ThePSHELLcardimageforthedesigncomponentcollectorpopsup.1.Fromthe1Dpage,selecttherigids.2.Clickreview.3.Selectoneoftherigidelementsinthegraphicsregion.4.Clickreturntogotothemainmenu.1.SelecttheMaterialCollectorstoolbarbutton.2.Selectthecreatesubpanelusingtheradiobuttonsontheleft-handsideofthepanel.3.Clickmatname=andentersteel.4.Selectthedesiredcolorforthematerialsteelbyclickingon.5.Clickcardimage=andselectMAT1fromthepop-upmenu.6.Clickcreate/edit.7.ForE,enterthevalue2.0E5.8.ForNU,enterthevalue0.3.9.ForRHO,enterthevalue7.85E-9.10.Clickreturn.11.ClickreturntoexittheMaterialCreatepanel.12.SelecttheCardEditortoolbarbutton.13.Clickthedownarrowontherightoftheentityshownintheyellowbox,selectpropsfromtheextendedentitylist.14.Clicktheyellowpropsbuttonandthenchecktheboxnexttodesignandnondesign.15.Clickselect.16.Makesurecardimage=issettoPSHELL.17.Clickedit.18.Replace0.300intheTfieldwith0.25.19.Clickreturntosavethechangestothecardimage.20.Clickreturntogotothemainmenu.Page2of6RADIOSS,MotionSolve,andOptiStructTutorialsRADIOSSBasicSmallDispla...2013-3-28file://C:\Altair\hw10.0\help\hwsolvers\rd1020.htmApplyingLoadsandBoundaryConditionstotheModel(Steps5-7)ThemodelistobeconstrainedusingSPCsattheboltlocations,asshowninthefollowingfigure.Theconstraintswillbeorganizedintotheloadcollector'constraints'.Toperformanormalmodesanalysis,arealeigenvalueextraction(EIGRL)cardneedstobereferencedinthesubcase.TherealeigenvalueextractioncardisdefinedinHyperMeshasaloadcollectorwithanEIGRLcardimage.Thisloadcollectorshouldnotcontainanyotherloads.Step5:CreateEIGRLcard(torequestthenumberofmodes)Ifaquantityinbracketsdoesnothaveavaluebelowit,itisoff.Tochangethis,clickonthequantityinbracketsandanentryfieldwillappearbelowit.Clickontheentryfield,andavaluecanbeentered.Step6:CreateConstraintsatBoltLocationsSelectingnodesforconstrainingtheboltlocations1.ClicktheLoadCollectorstoolbarbutton.2.Selectthecreatesubpanel,usingtheradiobuttons