virtual.lab声固耦合的隔声量仿真分析教程

《virtual.lab声固耦合的隔声量仿真分析教程》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

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

2、·DirectStructuralForcedResponse·DirectStructuralVibro-AcousticResponse·TransmissionLossThe modelcontainsaVisco-elasticfrequency-dependentmaterial.Pre-Requisites:SoftwareConfigurationsthatareneededtorunthetutorial:·LicensestosetupthecaseinLMSVirtual.Lab

3、:"Desktop(VL-HEV.21.1orequivalent)"and"FiniteElementAcoustics(VL-VAM.36.2)"·Whensolvingtheacousticresponsecase,thelicenseforproduct"LMSVirtual.LabFEMVibro-AcousticsStructuralSolverVL-VAM.45.2"isneeded.·SolvingtheRandomPost-processingcasetogettheTransmi

4、ssionLosscurvewillrequirethelicensefor"RandomVibroAcousticAnalysis(VL-NVP.20.3)" TutorialDataFiles:StructuralGroups.xmlSAFyoung.xlsLaminatedStructure.bdfFPmesh.bdfAMLsender.bdfAMLreceiver.bdfAcousticGroups.xml[AlldatafilescanbefoundontheAPPSnDOCSDVD,in

5、anarchivecalled VAM_DirectVA-TL.Foreaseofuse,itisbesttocopyallfilestoalocalfolder.]STEPBYSTEPTutorial:STEP1AfterstartingLMSVirtual.Lab,createanewdocumentintheAcousticHarmonicFEMWorkbench(StartAcousticsAcousticHarmonicFEM).STEP224SelectFileImportfromthe

6、mainmenu.[TheImportcommandcanalsobeselectedfromthecontextualmenuoftheLinksManager,byrightclicking]Afileselectorwindowappearsallowingyoutospecifythefiletypeandthefilename.[Formoredetails,seeImportingData]SelectthefiletypeNASTRANBulkFile(*.bdf,*.NS,*.nas

7、,*.dat)andbrowseforthefileLaminatedStructure.bdfandclicktheOpenbutton.Anewdialogboxappearsrequestingtheselectionofdatathatneedstobeimportedfromthefile.Thedataentriesthatarenotavailableinthefilearegrayedout.SelectinSplitintoMultipleMeshPartsunderMeshCre

8、ationandsettheunitsystemtoMeter,Kilogram,Second,clicktheOKbutton.STEP3Next,thedifferentstructuralmaterialswillbedefined.ThetwoouterlayersofthepanelaremadeofGlass.Toincorporatethe2%structuraldampingofthismaterial,itwillbemodeled24asavisc