virtual.lab声固耦合的隔声量仿真分析教程

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1、FEMDirectVibro-AcousticAnalysisCaseTutorialObjective:Thegoalofthistutorialistocalculatetheacousticresponseofaglass/PVBplate(alaminatedsafetyglasswithaPolyvinylbutyrallayerinbetween).Thetutorialincludesusingthefollowinganalysiscases:·StructuralModalcase·DirectStructu

2、ralForcedResponse·DirectStructuralVibro-AcousticResponse·TransmissionLossThe modelcontainsaVisco-elasticfrequency-dependentmaterial.Pre-Requisites:SoftwareConfigurationsthatareneededtorunthetutorial:·LicensestosetupthecaseinLMSVirtual.Lab:"Desktop(VL-HEV.21.1orequiv

3、alent)"and"FiniteElementAcoustics(VL-VAM.36.2)"·Whensolvingtheacousticresponsecase,thelicenseforproduct"LMSVirtual.LabFEMVibro-AcousticsStructuralSolverVL-VAM.45.2"isneeded.·SolvingtheRandomPost-processingcasetogettheTransmissionLosscurvewillrequirethelicensefor"Ran

4、domVibroAcousticAnalysis(VL-NVP.20.3)" TutorialDataFiles:StructuralGroups.xmlSAFyoung.xlsLaminatedStructure.bdfFPmesh.bdfAMLsender.bdfAMLreceiver.bdfAcousticGroups.xml[AlldatafilescanbefoundontheAPPSnDOCSDVD,inanarchivecalled VAM_DirectVA-TL.Foreaseofuse,itisbesttoc

5、opyallfilestoalocalfolder.]STEPBYSTEPTutorial:STEP1AfterstartingLMSVirtual.Lab,createanewdocumentintheAcousticHarmonicFEMWorkbench(StartAcousticsAcousticHarmonicFEM).STEP224SelectFileImportfromthemainmenu.[TheImportcommandcanalsobeselectedfromthecontextualmenuoftheL

6、inksManager,byrightclicking]Afileselectorwindowappearsallowingyoutospecifythefiletypeandthefilename.[Formoredetails,seeImportingData]SelectthefiletypeNASTRANBulkFile(*.bdf,*.NS,*.nas,*.dat)andbrowseforthefileLaminatedStructure.bdfandclicktheOpenbutton.Anewdialogboxa

7、ppearsrequestingtheselectionofdatathatneedstobeimportedfromthefile.Thedataentriesthatarenotavailableinthefilearegrayedout.SelectinSplitintoMultipleMeshPartsunderMeshCreationandsettheunitsystemtoMeter,Kilogram,Second,clicktheOKbutton.STEP3Next,thedifferentstructuralm

8、aterialswillbedefined.ThetwoouterlayersofthepanelaremadeofGlass.Toincorporatethe2%structuraldampingofthismaterial,itwillbemodeled24asavisc