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时间:2020-04-25
《喷涂阻尼厚度对车轮振动声辐射的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
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