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1、第34卷第4期噪聲與振動控制Vol34No.42014年8月NOISEANDVIBRLT10NCONTROLAug.2014文章編號:1006—1355(2014)04—0048-04+55噴涂阻尼厚度對車輪振動聲輻射的影響周信,肖新標(biāo),王瑞乾,趙悅,溫澤峰,金學(xué)松(西南交通大學(xué)牽引動力國家重點(diǎn)實(shí)驗(yàn)室,成都610031)摘要:在列車車輪表面噴涂阻尼材料可以降低車輪振動聲輻射,通過試驗(yàn)調(diào)查噴涂阻尼厚度對其減振降噪性能的影響。在半消聲室進(jìn)行對比試驗(yàn),測試了斜曲型輻板車輪在無阻尼、噴涂1nllTl和2mm情況下的振動聲輻射,和
2、雙s型輻板車輪在無阻尼、噴涂1rnlTl和4n21Tl阻尼下的聲輻射。測試結(jié)果表明:對于斜曲型輻板車輪,21TIITI阻尼層對車輪的減振區(qū)域和減振量均優(yōu)于11TI1TI阻尼層,在徑向和軸向激勵下,lmm阻尼層降噪量分別為2.0dB(A)和I.0dB(A);對于雙S型輻板車輪,在徑向和軸向激勵下,1InlTl阻尼層降噪量分別為1.9aS(A)和1.1dB(A)。對于這兩種輻板形式車輪,阻尼層增厚,降噪效果均增加。對于斜曲型車輪,在徑向激勵下阻尼具有更好的降噪效果,對于雙S型車輪,在徑向激勵和軸向激勵下阻尼降噪效果近似相同。
3、關(guān)鍵詞:振動與波;噴涂式阻尼車輪;阻尼厚度;聲輻射中圖分類號:TB53;U260.331.1文獻(xiàn)標(biāo)識碼:ADOI編碼: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