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·DirectStructuralForc

2、edResponse·DirectStructuralVibro-AcousticResponse·TransmissionLossThe modelcontainsaVisco-elasticfrequency-dependentmaterial.Pre-Requisites:SoftwareConfigurationsthatareneededtorunthetutorial:·LicensestosetupthecaseinLMSVirtual.Lab:"Desktop(VL-HEV.21.1orequivalent)"and"Fin

3、iteElementAcoustics(VL-VAM.36.2)"·Whensolvingtheacousticresponsecase,thelicenseforproduct"LMSVirtual.LabFEMVibro-AcousticsStructuralSolverVL-VAM.45.2"isneeded.·SolvingtheRandomPost-processingcasetogettheTransmissionLosscurvewillrequirethelicensefor"RandomVibroAcousticAnaly

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

5、TEPBYSTEPTutorial:STEP1AfterstartingLMSVirtual.Lab,createanewdocumentintheAcousticHarmonicFEMWorkbench(StartAcousticsAcousticHarmonicFEM).STEP224SelectFileImportfromthemainmenu.[TheImportcommandcanalsobeselectedfromthecontextualmenuoftheLinksManager,byrightclicking]Afilese

6、lectorwindowappearsallowingyoutospecifythefiletypeandthefilename.[Formoredetails,seeImportingData]SelectthefiletypeNASTRANBulkFile(*.bdf,*.NS,*.nas,*.dat)andbrowseforthefileLaminatedStructure.bdfandclicktheOpenbutton.Anewdialogboxappearsrequestingtheselectionofdatathatneed

7、stobeimportedfromthefile.Thedataentriesthatarenotavailableinthefilearegrayedout.SelectinSplitintoMultipleMeshPartsunderMeshCreationandsettheunitsystemtoMeter,Kilogram,Second,clicktheOKbutton.STEP3Next,thedifferentstructuralmaterialswillbedefined.Thetwoouterlayersofthepanel

8、aremadeofGlass.Toincorporatethe2%structuraldampingofthismaterial,itwillbemodeled24asavisc