通透微穿孔板吸声结构的设计及研究

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1、北京交通大学硕士学位论文通透微穿孔板吸声结构的设计及研究姓名：黄磊杰申请学位级别：硕士专业：车辆工程指导教师：宋雷鸣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