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1、北京交通大學(xué)碩士學(xué)位論文通透微穿孔板吸聲結(jié)構(gòu)的設(shè)計(jì)及研究姓名：黃磊杰申請學(xué)位級別：碩士專業(yè)：車輛工程指導(dǎo)教師：宋雷鳴20080601ABSTRACTABSTRACT：Withthedevelopmentofmodemindustryandtraffictransportationbusiness，whiletherailwaytransportationandthetraffictrackarebringingtheenormoussocialbenefitandeconomicbenefits，someenviron
2、mentalproblems，suchasthenoisepollutionbecomesmoreoutstandingproblem．Thenoisepollutionhasalreadybecomethefocusthatpeoplehavebeendiscussing．itinfluencespeople’Snormalwork，studyandlivingseriouslyandcausesgreatdangertosomebody’Sbodyandmind．Sowemustcarryoneffectiveco
3、ntroltothenoise，buttheabsorbingstructureofmicroperfratedpanelistheeffectivewaytonoisecontrollingwhichhasbeendevelopedinrecentyears，whichhasalreadywidelyused．Thistextconsultrelevantmaterialsandunderstandtheprincipleandbasictheoriesofsoundabsorptionandnoisereducti
4、onoftheabsorbingstructureofmicroperfratedpanelprincipleatfirst，combinesalargenumberofdomesticandinternationalmaterialsandthesurveyingdatas，andprovidesthedesigningparameteroftheabsorbingstructureofmicroperfratedpanel，thuswhichsettlesthesolidfoundationfordesigning
5、ofthestructurelater．Thetextdetailedlyanalysesthemainreasonofsoundabsorptionandnoisereductionfinally,andcarryonstudyingthetheoryandexperiment．Throughananalysisofexperimentalresult，thatconfirmesthevariousmainfactorsofinfluencingtheperformanceofsoundabsorptionandpu
6、tsforwardthecorrespondingcontrolmeasureatthesametime．Inexperiment，atfirstweregardluciteastheexperimentmaterialandmakeuseoftheparameterdataswhicharedesignedbyoneself,carryonrelevantstepsofpunchingetc．totheexperimentmaterial；thenwecarryontheexperimentofthetestofth
7、esoundabsorptioncoefficientbythereverberationroommethodinthesmall-scalesoundinsulationroomwhichissetup，itismainlytostudywhetherthesoundabsorptioncoefficientoftheabsorbingstructureofclaritymicroperfratedpanelreachestheprescriptiveruquest．Thedesigningandtheexperim
8、entvalidatingoftheabsorbingstructureofclaritymicroperfratedpanelwithinthesoundbarrierthatthistextputsforwardpenetratingly,whichplaysaveryimportantpartincontrollingthe
