喷涂阻尼厚度对车轮振动声辐射的影响-论文.pdf

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1、第34卷第4期噪声与振动控制Vol34No．42014年8月NOISEANDVIBRLT10NCONTROLAug．2014文章编号：1006—1355(2014)04—0048-04+55喷涂阻尼厚度对车轮振动声辐射的影响周信，肖新标，王瑞乾，赵悦，温泽峰，金学松(西南交通大学牵引动力国家重点实验室，成都610031)摘要：在列车车轮表面喷涂阻尼材料可以降低车轮振动声辐射，通过试验调查喷涂阻尼厚度对其减振降噪性能的影响。在半消声室进行对比试验，测试了斜曲型辐板车轮在无阻尼、喷涂1nllTl和2mm情况下的振动声辐射，和

2、双s型辐板车轮在无阻尼、喷涂1rnlTl和4n21Tl阻尼下的声辐射。测试结果表明：对于斜曲型辐板车轮，21TIITI阻尼层对车轮的减振区域和减振量均优于11TI1TI阻尼层，在径向和轴向激励下，lmm阻尼层降噪量分别为2．0dB(A)和I．0dB(A)；对于双S型辐板车轮，在径向和轴向激励下，1InlTl阻尼层降噪量分别为1．9aS(A)和1．1dB(A)。对于这两种辐板形式车轮，阻尼层增厚，降噪效果均增加。对于斜曲型车轮，在径向激励下阻尼具有更好的降噪效果，对于双S型车轮，在径向激励和轴向激励下阻尼降噪效果近似相同。

3、关键词：振动与波；喷涂式阻尼车轮；阻尼厚度；声辐射中图分类号：TB53；U260．331．1文献标识码：ADOI编码：10．3969~．issn．1006．1335．2014．04．011InfluenceofSprayedDampingThicknessonVibrationandSoundRadiationofDampedWheelsZHOUXin。XIA0Xin—biao，WANGRui-qian，ZHA0Yue，WENZe。feng。JINXue-song(StateKeyLaboratoryofTraction

4、Power,SouthwestJiaotongUniversity,Chengdu610031，China)Abstract：Sprayingdampingmaterialsonthesurfaceofwheelsisanefectivemeasuretoreducevibrationandsoundradiation．Inthispaper,theinfluenceofspreaddampingthicknessonthevibrationandsoundradiationofasprayeddampingwheeli

5、sinvestigatedexperimentally~Thecomparativeexperimentsarecarriedoutinasemi—anechoicroom．Thevibrationandsoundradiationofobliquelycurvedwheelwith1nlrnand2mmthicksprayeddampinglayersandwithoutdampingmaterialaremeasuredrespectively．Thenthesoundradiationofadouble—Sshap

6、edwheelwithlmmand4mlrlthickdampinglayersandwithoutdampingmaterialisalsomeasuredrespectively．Theresultsshowthatthe2rnrnthickdampingmaterialhasbettervibrationabsorptionandnoisereductionperformancefortheobliquelycurvedwheelthanthatoftheonewith1mmthickdampinglayer~An

7、dthenoisereductionsoflmmthickdampinglayerare2．0dB(A)and1．0dB(A)respectivelyunderradialandaxialexcitations．Forthedouble-Sshapedwheel，thenoisereductionsoflmmthickdampinglayerare1．9dB(A)and1．1dB(A)respectivelyunderradialandaxialexcitations．Noisereductionincreasesast

8、hethicknessofthedampinglayerincreasesforthetwotypesofwheels．Fortheobliquelycurvedwheel，theefectsofsprayeddampinglayeraremoreefectiveunderradialexcitations．Whil