圓柱殼結(jié)構(gòu)聲振耦合分析及聲學-結(jié)構(gòu)靈敏度計算.pdf

1、東北大學博士學位論文圓柱殼結(jié)構(gòu)聲振耦合分析及聲學結(jié)構(gòu)靈敏度計算姓名：艾延廷申請學位級別：博士專業(yè)：機械電子工程指導教師：聞邦椿20060701東北大學博士學位論文AbslractAnalysisofCylindricalShellStructureSoundCouplingandCalculationofAcousticstructureSensitivityAbstractNumericalanalysisofsoundfieldan

2、dcoupledacousticstructuresystemarcwidelyusedinmanyindustryfields，nlemosteffectivemethodtoimprovethesiringcomfortabilityanddecreasenoisepollutionistomakeoptimumdesignandanalysisofsoundvibrationqualityatthebeginningofdesig

3、nofairplane，carandlrainetcTraditionalmethodisdifficulttopredicttheinsidesoundfieldpressureofcomplexstructure，whilefiniteelementmethodcallmakenumericalcalculationandanalysisoncomplicatedvibrationacousticproblemsandcouplin

4、gsystemsFiniteelementmethodprovidesusausefulwaytomakeperformanceanalysisofstructuralsoundandcoupledacousticstracturesystemCylindricalshellisot：xtellusedinmanyfieldssuch越aviationaerospaceandnavigationsetcP∞plehavemuchrequ

5、irementsonsiringcomfortabilitywitllthelivinglevelimprovedTeducetheradiationofthesubmarineisimportanttoimproveitsperformanceofhidingandfightingHence，thissubjecthaspracticalvalueBasedonthefiniteelementfiniteelementmethods(

6、FEM)thestructuralsoundradiationandtheacoustic—structuraldesignsensitivityofcavunlsystemareanalyzedThecontrolequationofstructuralsoundradiationbyusingFEMandtheiterativeequationoftheacousticamcn塒ldesignsensitivityarcderive

7、dByusingANSYSfinitesoftwareandtheseconddevelopmenttechnologyofit，calculationofstructuralsoundradiationofcylindricalshellismadeandtheacoustic—structuraldesignsensitivityofcylindricalshellisanalyzed11“researchcontentsaleas

8、follows：(1)ThestructuralvibrationmodeIandacousticmodelofcylindricalshellWeTeestablishedandthevibrationmodalandacousticmodalofthecylindricalshellslr眥turewerecalculatedbyusingANSYSfiniteelementsol[ware(2)111epassengers’cab

9、inwassimulated，andtheinfluenceofscats，soundabsorptionmaterialsandslatsonthestructuralsoundpressureinthecabinmotivatedbysineexcitationwasdiscussed(3)Usingthenlicknessofcabinwallasvariable，theacousticstructuraldesignsensit