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基于声辐射模态的阻尼板声功率灵敏度分析及优化.docx

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基于声辐射模态的阻尼板声功率灵敏度分析及优化 Abstract Inthispaper,astudyonthedampingplatesoundpowersensitivityanalysisandoptimizationbasedonacousticradiationmodeswasconducted.Firstly,theconceptanddefinitionofsoundpowerwereintroduced,andthephysicalmeaningandcalculationmethodofacousticradiationmodeswereanalyzed.Then,thetraditionalmethodandthenewmethodofsoundpowersensitivityanalysiswerecomparedandanalyzed,andtheadvantagesanddisadvantagesweresummarized.Finally,basedonthenumericalsimulationmodelofthedampingplatesoundradiation,theoptimizationofsoundpowersensitivitywascarriedoutbyadjustingthestructuralparametersofthedampingplate.Theresultsshowedthatthenewmethodofsoundpowersensitivityanalysisbasedonacousticradiationmodeshadhigheraccuracyandfastercalculationspeed,andtheoptimizeddampingplatestructurecouldgreatlyimprovethesoundpowersensitivity. Introduction Withtherapiddevelopmentofmodernindustry,noisepollutionhasbecomeaseriousproblem,affectingpeople'shealthanddailylife.Dampingplatesarewidelyusedinthefieldofnoisecontrol,whichcaneffectivelyreducethenoiselevelofmechanicalequipment.However,inthedesignandoptimizationofdampingplates,therearestillmanyproblemstobesolved.Thesoundpowersensitivityanalysisisanimportantmeanstoevaluatetheperformanceofdampingplates,andtheoptimizationofsoundpowersensitivityisaneffectivewaytoimprovethenoisereductioneffect. Soundpoweristheacousticenergyradiatedbyasoundsourceinalldirections.Itisanimportantparametertoevaluatethenoiselevelofmechanicalequipment.Thesoundpowerofasoundsourcecanbeexpressedintermsofsoundpressure,soundintensity,oracousticradiationmodes.Theacousticradiationmodemethodisanewmethodofsoundpoweranalysis,whichisbasedonthespectralrepresentationofthesoundfieldandthemodaltheoryofthestructure.Theacousticradiationmodescanbecalculatedbythefiniteelementmethodortheboundaryelementmethod,andthesoundpowercanbeobtainedbythesuperpositionofeachmode. Inthispaper,theconceptandcalculationmethodofacousticradiationmodesareintroduced,andthetraditionalmethodandthenewmethodofsoundpowers