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《汽車車內(nèi)噪聲源識別方法應(yīng)用分析》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、碩士學(xué)位論文=E目!jEj#=}l拿目=目魯l=目自目E目E}!自=E自=自__目自目i———————————————————————————————————一iII：AbstractTheNVH(Noise，Vibration，Harshness)ofautomobileshasbeenturningtobeacriticalfactorforthecustomers’commentsontheperformanceofautomobiles，SOhowtoreducetheinteriornoisehasb
2、ecometheproblemtobeurgentlyresolvedinordertoimprovethedrivingcomfort．Additionally，itisofgreatimportancetoidentifyinteriornoisesourceconsideringthevariousfactorsaffectingtheinteriornoise．Inthispaper'noisewasidentifiedfromtheperspectiveofnoisesourceidentificat
3、ion，low—frequency，high．frequencyandfull·frequencynoisewereidentifiedrespectively．Andcomparativestudiedontheadvantagesanddisadvantagesofthenoisesourceidentificationtechnology．Themaincontentsarcasfollows：First，Low．frequencynoisesourceidentificationbasedonCAEte
4、chnology．ItfocusesontheapplicationofFEM，BEM，ATVonlow·frequencynoisesourceidentification．Thefiniteelementmodelandboundaryelementmodelwereestablished,andtheFEM，BEMandacoustictransfervector(ATV)methodswererespectivelyusedtopredictthelow—frequencyradiatednoise．B
5、ythecalculationofcontributionofpanels，thepanels’contributioninthepeakfrequencywasdetermined．Besides，themainnoisesourceswereidentifiedandrankedbythepanelcontributionanalysisofsoundpressure．Andthestructuredesignflawswerefound，besidesthedirectivepropositionabou
6、tstructuraloptimizationdesignwasproposed．Throughthestudyonthelow．frequencynoisesourceidentification，theimportanceofvirtualdesignofthevehicledevelopmentwasgreatlyclarified．Second，high·frequencynoisesourceidentificationbasedonSEA．It’Smainlyabouttheapplicationo
7、fSEAinthehigh—frequencynoisesourceidentification．ByestablishingaSEAmodalandapplyingthemeasuredexcitationsource，theinteriorhigh．frequencynoiseofthevehiclewaspredictedsuccessfully．SortingtheinputpowerofinteriornoisewithSEA，themaininputpanelsoftheinteriornoisew
8、asidentified，andthemainthemainhigh—frequencynoisesourcesinsidethecarwareidentifiedfromtheperspectiveofsoundradiationandtransmission．Basedonthese，thefeasiblemeasuresofnoisereductionwereproposed．A
