Patran for Advanced Users Exercise_19_FEM_Global_

PATRAN302ExerciseWorkbook-Release8.019-1LESSON19Global/LocalModelusingFEMFieldsXYZObjectives:■Importagloballoadsmodelandcorrespondingresults.■Importlocaldetailpanelstressmodel.■CreateadisplacementFEMFieldbasedontheresultsoftheGlobalModelforapplicationasanenforceddisplacementonthelocalmodel.■CreateanMSC/NASTRANinputdeck.19-2PATRAN302ExerciseWorkbook-Release8.0LESSON19Global/LocalModelusingFEMFieldsPATRAN302ExerciseWorkbook-Release8.019-3ModelDescription:InthisexerciseyouwillreadinaGlobalLoadsmodelandthecorrespondingresultsofamulti-cellboxbeamfromaMSC/NASTRANoutputfileintoanewPATRANdatabase.Thenyouwillreadinthelocalmodel,adetailedpanelstressmodelthatrepresentsanouterskinofoneofthecellsinthegloballoadsmodel.Thedetailedmodelcontainsthicknessbuildups,detailedstiffermodelingandanaccesshole.TheresultingdeflectionsoftheGlobalLoadsModelwillbeappliedtotheperimeteroftheLocalStressModelasenforceddisplacements.Thiswillsimulatetheloadstransferredacrossafree-bodysectionoftheglobalmodelwherethelocalmodelresides.Additionally,panelpressureswillbeappliedtotheLocalStressModeltoaccountforalltheloading.Finally,aninputdeckoftheDetailedStressModelwhichcontainsthesenewloadswillbewrittenoutintoafile.Theviewoftheglobalmodelisasshownhere.XYZ19-4PATRAN302ExerciseWorkbook-Release8.0SuggestedExerciseSteps:■Openanewdatabasecalledglobal_local.db.■Createanemptygroupforthewholemodel.■ReadinboththemodelandtheresultsoftheGlobalLoadsModel.■Createanemptygroupforthepanelpartofthemodel.■ReadintheMSC/PATRANinputdeckthatrepresentsthedetailedpanelstressmodel.■Setanoffsetforthenodesandelementsofthepanelmodelfromtheglobalmodelsothattheydonotinterfere.■Makeafringeplotofthedeflectionoftheglobalmodel.■Makeavectorplotandcreateaspatialfieldoftheglobalmodel.■Createadisplacementconstraintsonthepanelmodel.■Createanuniformpressureloadonthepanelmodel.■UseAnalysisDecktocreateaMSC/PATRANinputdeckforthepanelmodel.LESSON19Global/LocalModelusingFEMFieldsPATRAN302ExerciseWorkbook-Release8.019-5Files:Allthefilesusedinthisexercisearelistedbelow.Eachlistingincludesthefile,whereitoriginated,itsformat(text/binary)andsummaryinformationastohowitrelatestothisexercise.FileSupplied/CreatedFormatDescriptionp3quickpick.defsuppliedtextThisisanASCIIfilethatsetsupthep3suppliedquickpickfile.Thisfiledisplays2columnsX16rowsofdefaultp3icons.AsimilarfileislocatedinP3HOME.multi_cell_box.op2suppliedtextMSC/NASTRANresultsoutputfilethatisinasciiformat.ThisfileiscontainsthemodelandresultsdataforthegloballoadsmodelusedinthisexerciseandoriginatedfromaNASTRANsolution101run.multi_cell_box.op2.binsuppliedbinaryThisisthefilethatgetscreatedwhenthemulti_cell_box.op2fileisreadintothePATRANdatabase.Thisisabinaryrepresentationoftheop2file.panel.bdfsuppliedtextThisisanASCIIMSC/NASTRANinputdatadeckthatisreadintothePATRANdatabase.Thisfilerepresentsthedetailedmodelofacoverpanelforthemulti_cell_bodymodelandcontainssuchdetailsaspanelaccesshole,stiffenersandcaps.global_local.dbcreatedbinaryThisisaPATRANdatabase(binary)creatednewforthisexercise.Thepanel.bdfandmulti_cell_box.op2,arereadintothisdatabase.Thedisplacementsofthegloballoadsmodelareappliedtothedetailedstressmodel.Thedetailedstressmodel(new_panel.bdf)isthenregenerated.19-6PATRAN302ExerciseWorkbook-Release8.0global_local.msg.01createdtextThisisanASCIImessagefilethatgetsgeneratedwhenthemulti_cell_box.op2filegetsreadin.Thisfileprovidesasummaryofalltheinformationthatwasreadin.Also,anyerrorsorwarningsmessagesgetincludedintothisfile.naspat.msg.01createdtextThecurrentprocessforimportinganinputfileistofirstconvertittoaPATRAN2.5neutralfilethenimportitintothedatabase.Thisisthemessagefileforthefirststepfortheconversionofthepanel.bdfintoaneutralfile.ThisASCIIfilecontainsinformationregardingMSC/NASTRANcardsconversionandinformationonunrecognizedcards.patran.pat.01createdtextThisistheneutralfilerepresentationofthepanel.bdffile.Thisfilegetscreatedduringtheprocessofreadinginthepanel.bdffile.new_panel.bdfcreatedtextThisisanewlycreatedMSC/NASTRANinputdeck.Thisfilecontainsthepanel.bdfandtheperimetergloballoadsdisplacementsandpanelpressures.new_panel.msg.02createdtextThisisanASCIImessagefilethatgetsgeneratedwhenthenew_panel.bdffilegetswrittenout.Thisfileprovidesasummaryofalltheinformationthatwaswrittenout.Also,anyerrorsorwarningsmessagesgetincludedintothisfile.patran.prtcreatedtextThisisthePATRANtextreportfilecreatednewfromwithinthisdatabase.ThisfilecontainsuserspecifiedresultsdataandisinASCIIformat.LESSON19Global/LocalModelusingFEMFieldsPATRAN302ExerciseWorkbook-Release8.019-7ExerciseProcedure:1.Openupanewdatabaseandcallitglobal_local.db.IntheNewModelPreferenceformsetthefollowing:2.Createanemptycurrentgroupfortheglobalmodelasfollows:3.UseAnalysistoreadinBOTHthemodelandresultsoftheGlobalLoadsModel.File/NewNewDatabaseName:global_local.dbOKTolerance:◆BasedonModelApproximateMaximumModelDimension:10AnalysisCode:MSC/NASTRANAnalysisType:StructuralOKGroup/Create...NewGroupNameglobal_loads_model■MakeCurrent■UnpostAllOtherGroupsApplyCancel◆AnalysisAction:ReadOutput2Object:BothMethod