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AltairHyperMeshInterfacingwithLS-DYNAVersion5.1ContactAltairEngineeringat:Website:ftpPassword:youre-mailaddressLocationTelephonee-mailNorthAmerica248.614.2425hmsupport@altair.comGermany49.7031.6208.22support@altair.deIndia91.80.658.854091.80.658.8542support@altair-eng.soft.netItaly39.0832.315.57339.800.905.595support@altairtorino.itJapan81.3.5396.1341aj-support@altairjp.co.jpScandinavia46.46.286.2052support@altair.seUnitedKingdom44.1327.810.700support@uk.altair.com2002AltairEngineering,Inc.Allrightsreserved.TrademarkAcknowledgments:HyperWorks,HyperMesh,OptiStruct,HyperForm,MotionView,HyperView,HyperGraph,HyperOpt,HyperShape/Pro,StudyWizard,HyperViewPlayerandTemplexareregisteredtrademarksofAltairEngineering,Inc.Allothertrademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.AltairEngineeringInterfacingwithLS-DYNA1LS-DYNATranslationOverviewThissectiondescribestheHyperMeshLS-DYNAinterface.HyperMeshcanreadexistingLS-DYNAdecks,createamodel,displayandeditLS-DYNAcardsastheywilllookinthedeck,andwriteadeckforanalysis.HyperMeshalsoprocessesLS-DYNAbinaryandASCIIresultsfilessothattheresultscanbeviewedinHyperMesh.HyperMeshtreatsLS-DYNAasacardimagecode.SeeAlsoComponentsandPropertiesNodesControlVolumesOtherGroupsCreatingCardsOutputBlocksCurvesResultsTranslationElementsRigidWallsEntitySetsSensorsEquationsSummaryTemplatesExportingDecksSupportedCardsHyperMeshGroupsSystemsImportingDecksTipsandTechniquesLoadCollectorsVectorsLoads,Constraints,andBoundaryConditionsViewingtheResultsMaterialsWorkingwithCommentCardsSupportedDynaKeywordsLSDYNAKEYMacroMenuRecommendedProcessImportingDecksVersionsofKeywordfilesarereadusingtheDYNAKEYinputtranslator(orDYNAKEY.EXEonPCs).Structuredfilesofversion920andhigherarereadusingtheDYNASEQinputtranslators(orDYNASEQ.EXEonPCs).Thistranslatorhandlesbothregularandlargeformatdecks.Thermalcontrolcards27through30arenotsupported.Toimportdatawiththeinputtranslator:1.Selectthefilespanel.2.Selecttheimportsubpanel.InterfacingwithLS-DYNAAltairEngineering23.ClickEXTERNAL.4.Clicktranslator=andenter/LS-DYNA/DYNAKEY(.EXE)or/LS-DYNA/DYNASEQ(.EXE),orclicktranslator=againtobrowsethedirectorystructureforthetranslator.5.Clickfilename=andenterthenameofyourLS-DYNAfile,orclickfilename=againtobrowsethedirectorystructureforyourfile.6.Clickimport.ExportingDecksHyperMeshoutputsthefollowingLS-DYNAfiles:•LS-DYNAv960inputfilesinKeywordformat•LS-DYNAv936inputfilesinStructuredformat•TooutputKeyworddecks,usethedyna.keytemplatefile•TooutputregularformatStructureddecks,usethedyna.seqtemplatefile•TooutputlargeformatStructureddecks,usethedyna.lrgtemplatefile•Twotemplatesarealsoprovidedtooutputthedefinedcurvesinthedatabase:•TooutputcurvesinKeywordformat,usethecurves.keytemplate•TooutputcurvesinStructuredformat,usethecurves.seqtemplateNOTEWhenconvertinganLS-DYNAmodeltotheRADIOSSformat,checkandupdatetheelementtypespriortowritingtheconvertedmodeltofile.Someformulationsmaynotmapcorrectly,suchasRADIOSSSHELL3NtoLS-DYNAACCEL.Tocreateananalysisdeckviaatemplate:1.Selectthefilespanel.2.Selecttheexportsubpanel.3.Clickfilename=andenterthenameoftheoutputfile.4.ClickTEMPLATE.Anewinputfield,template=isdisplayedifnotalreadydisplayed.5.Clicktemplate=andspecifythefilenameofthetemplatefile.6.Clickwrite.SummaryTemplatesToobtainaconciselistofentitiesinthecurrentmodel,usethetemplatefile=optiononthesummarypanel.ThiscreatesanASCIItextfilewiththesummaryinformationanddisplaystheinformationonthescreen.AltairEngineeringInterfacingwithLS-DYNA3LS-DYNAhasfoursummarytemplatefiles:elements,properties,center_of_gravity,anderrorcheck.Theyarelocatedinthetemplate/summary/ls-dynadirectory.Theelementssummarytemplateprovidesalistingofelementtypesandthenumberofeachtypecontainedinthecurrentmodel.Italsoindicatesthetotalnumberofelementsinthemodel.Thepropertiessummarytemplatedescribesthecomponentsandtheirpropertiescontainedinthemodel.Thetemplateliststhename,ID,andmaterialIDforeachcomponent.Componentsthathavethe*PARTcardimageloadedalsolisttheSectionID,thecardoption(forexample*PART_INERTIA),andthemasscontainedinthatcomponent.Themassiscalculatedusingthesameprocedureasthemasspanel.SeeMassCalculation.Thecenter_of_gravitysummarytemplatecalculatesthemodel’scenterofgravitybasedontheproceduredescribedintheMassCalculationssection.TherearealsotwotemplatesthatperformerrorcheckingonLS-DYNAmodels:errorcheckandsharedrigids.Usetheerrorchecktemplateinthesummarypanel.Thistemplategivesabriefoverviewofproblemsthatexistinthemodel.Usethesharedrigidstemplateintheelementcheckpanel.Thistemplatehighlightstheelementswithnodesthataresharedamongrigids.Wheneitheroftheerror-checkingtemplatescheckforsharedrigids,thetemplatehighlightsonlythesecondelementthatusesanode.Ifanelementinarigidmaterialissharinganodewithanotherrigid,onlythefirstelementinthatcomponentishighlighted.Possibleerrorsmessages:•Elementsincomponentspointingtoa*SECTIONcardofthewrongtype•Zeroornegativethickness•Rigidelements,components,orinterfacessharingnodes•Components