统计能量分析在轻轨交通噪声预测中的应用

111(1.,430074):SEA(statisticalenergyanalysis),,,,.,,,,.:;;:X830.2:X839.1:A:1000-5730(2002)03-0057-04,.,,,,,.,,,.[3]SEA(),.,,:,;,;,,.,.1SEA[1](),,,,.SEA()[2],.,,(1),,E111+E112-E221=P1,in;E112-E222-E221-E223+E332=P2,in;E223+E443-E332-E333-E334=0;E334-E444-E443=0,(1)1SEA,;ii,Ei(i=1,2,3,4);12;21;23;32;34;43;P1,in:2002-07-04.:(1974-),,;,(430074).193()Vol.19No.320029J.ofHuazhongUniv.ofSci.&Tech.(UrbanScienceEdition)Sep.2002©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.P2,in;P1,diss,P2,diss,P3,dissP4,diss.(1){E1,E2,E3,E4},.2SEA,()().,,.P1,inP2,in,Pi,in=Gf()/(2Mi),,Gf(),;Mi(i=1,2),.[7]57kg/m2700m,,Gf().,,,,.[2].,,[2],IIin=-Sfv()d;(2)=IIin/(E),(3)(2)(3),IIin;RfvSvf;;E.4,[6].a.,21=G1G2Y1+Y22f;(5)12=n221/n1,(6),Y1Y2;G1G2;f.21,Y1+Y22f.,,.b.,21=1k2A211+(k2/k1)41/4G1G2|Y1+Y2|2f,(7),k1k2;A22.,,,();(,);(,).3MatlabC/C++(2).,(1),Vi2=Ei/Mi.Lvi=10lg10V2i/V2ref,(8),Vref=1m/s.LEi=10lg(Ei/10-12)(dB),(9),LEi=lg10M+Lvi+120.(10)[5],V32/V22=M2M322322+(2n2/n3)23+234(1-A);(11)V42/V32=(M3/M4)(n4/n3)A;(12)A=n3n23444+(n3/n4)34,(13),M2;M3;M4.,,Pi2(i=2,3,4)85()2002©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.Pi2=iA(c)24d1T+-V2i(t)dt,(14)2,i;c;d;A.,,,.LAi=10lg(Pi2/P02),(15),P0=10-12Pa,LAt=10lg(ni=110LAi/10)(dB).(16)44.1,[57](V=45km/h,1,20mm,,d=3m),,3m,3,,,,SEA.34.2.a.is,.,.b.[4],,iir[1],ir=0Clr,,lr.ir,.,,,().[5](1),(),4.41/Hz250500100020000.100.80.060.030.150.110.090.074,,610dB.c.,is,..,,953:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved..5,,,15dB.55a.[1],,,.SEA..b.,,,SEA,,5dB.c.,SEA(),,.[1],.[M].:,1995.[2]NortonMP.[M]..:,1987.[3]J.Anderson.PredictionofnoisefromRailwayBridges[J].ElsevierScienceLtd,1998,40(1):65-66.[4]RufinMakarewicz.Noisefromrailwaybridge[J].AppliedAcoustics,1998,55(1):43-51.[5]RemingtonPJ.LarryEWittig.Predictionoftheeffective2nessofnoisecontroltreatmentsinurbanacoust[J].Soc.Am,1985,(12):2017-2032.[6]R.H.Lyon.MachineryNoiseandDiagnostics[M].Butter2worths,1987.[7],.[J].,1995,(1):17-24.Predictionoflight2rail2transitNoisebyStatisticalEnergyAnalysisDUANJin2ming1ZHOUJin2xuan1LIYan2ping1(1.CollegeofEnvir.&Sci.Eng.,HUST,Wuhan,430074,China)Abstract:Basedontheprincipleofthestatisticalenergyanalysis(SEA),atheoreticalmodelofSEAappliedtothepredictionofthenoiseofelevatedlight2railtransithasbeensetup.Inaddition,byanalyzingnoisefromwheels,rails,paddingandbridgespart,andconsideringtherelationshipbetweenvibrationandproductionofnoisesofthetransitionsystem,thesoundlevelradiatingfromthetransitsystembymeansofsimulationcalculatingcanbegot.Afteranalyzingthecalculatedresults,manyeffectiveconclusionsaboutthecontrolofthenoiseinelevatedrailtran2sitsystemareachieved,whichnotonlyprovidesanewmethodofpredictionofvibrationandnoiseincityelevatedrailtransitsystem,butalsopromotesthefurtureresearchofthecontroloflight2railnoise.Keywords:elevatedlight2rail;statisticalenergyanalysis;noiseprediction06()2002©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.