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©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(10672107):2008-10-15,,,1980,,1959,,,(,050043):,,,,,,,:;;;:U467.4:A,,,,,,,,,,,,,[1],,BBMPAK-,,,1,,,,,,,,,[2]:,,,,,:,,,:,,,,,,,,,[3-4][5]:,,,,,,,,,,,,©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Beamforming),,,,,,(),,,2,,,2,1[6-8]f(x,t),ri,i=ric,c,i=i-min(i),:f^(x,t)=1MMi=1wifi[x,(t-i)](1)wi,1(1),P^eff(x)P^eff(x,n)=1nn-1k=0f^2(x,tk)(2),,,:2()=sin(Nsin/)Nsin(dsin/)(3):d;();;N3311,,,,1000m2,,23,2m/s312SUV,11/mm3510517851870/kg1670/mm3025/ml2237Nm/(rmin-1)190/3200kW/(rmin-1)75.0/4600/(kmh-1)1203.3BBMPAK-,3,2,,,MI-06002,USB,,,271200928©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)BBM,(32,3,),BBM,PAK(2),,,(3),,(4),30s,,PAKSTART,10s,3,32,,10s,,,,(5)(4),(6),,,3PAK3.51500r/min3000r/min4500r/min41500r/min,,,,,400Hz2000Hz,987.5Hz,84.2dB(A),41500r/min5,987.5Hz,,,,,,51500r/min63000r/min,,,0Hz500Hz,406.25Hz,51.8dB(A)3716:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(A),,,,84500r/min9,162.5Hz,,,,,,94500r/min3000r/min4500r/min,,,3000r/min,,,,,,,,,,,4(1),,;,,,,(2),,,,(190)471200928©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:440.085310.085310.078450.076982007-09-3022:320.085310.083350.076980.076982007-10-0207:360.083350.078450.076980.073542007-10-0515:070.078450.078450.073540.072072007-10-2223:340.078450.08580.072070.0882532007-10-2305:460.08580.08580.088250.086292007-10-2422:560.08580.076490.086290.068642007-10-2622:460.076490.076490.068640.067172007-10-2815:240.076490.076490.067170.06572007-10-2906:050.076490.076490.06570.064722007-10-2915:170.076490.075020.064720.064722007-10-2919:350.075020.077470.064720.064722007-11-0106:530.077470.077470.064720.067662007-11-0123:090.077470.077470.067660.07063,,,,1051022,,10111028,()0.624,1.517,,4,,,9A1,,,,[1].[J]./,2001(9):9-12.[2],.[J].,1999(5):13-15.[3].[J].,1995(3):25-27.[4].[M].:,1992,284-287.[5],,.[J].,2007(7):38-39,45.[6],,,.LabWindows/CVI[J].,2007,43(16):222-224.[7]GB3836.04-2000-[S]:4.[8],,,.[J].,2006,25(1):102-106.(174)[1]BarsikowB,etal.Wheel/RailNoiseGeneratedbyaHigh2speedTrainInvestigatedwithaLineArrayofMicrophones[J].JournalofSoundandVibration,1987,118(1):743-749.[2],,,.[J].,2006,17(7):733-736.[3],,,.[J].,2003,(9):6-9.[4],.[J].,2002,27(4):357-362.[5]BrtihlS,RMerA.Acousticnoisesourcemodelingbasedonmicrophonearraymeasurement[J].JournalofSoundandVibration,2000,231(3):611-617.[6]MoebsGB,etal.Theuseoftwo2dimensionallysparsearraystovisualizethesoundfieldradiatedbyamovingvehicle[A].ProceedingsofNoise2Con1998,Ypsilanti,Michigan,1998,519-524.[7]KokH,DaviesP,BoltonJS.Thedesignandevaluationofmicrophonearraysforthevisualizationofnoisesourcesonmov2ingvehicles[A].Proceedingsofthe1999NoiseandVibrationConference,SAEPaper,1999,99NV2227.[8],,.[J].,2007,40(6):655-660.091200928©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:plasticextruder;criticalityanalysis;information2entropymethod;TOPSIS;multipleattributedecisionmaking(pp:164-167)Dynamicmeasurementofthe3DshapegravitywavesindragonwashbasinLIUXi2jun,LIANGChen2jie,GUOJi2ping,JIAQi2fen,TENGXiao2jun,LIULong2xia(MechanicsDepartmentinMechanicalEngineeringSchool,TianjinUniversity,Tianjin300072,China)Abstract:Theforcedvibrationtestofthedragonwashbasinwascarriedout.Whenacertainfrequencyexcitingforceisappliedontheshellofthedragonwashbasin,gravitywaveswithdifferentshapeswillappear.Inviewofthelargemagnitudeofthewaterwaves,andthewatersplash,morespecialconsiderationshoulebepaidtothemeasurement.Ac2cordingtothecrossedopticalaxistheorytheexperimentsystemwasdesigned.Theslitsintherasterwasmadeadjustable,andhighspeedcamerawasusedfortakingpictures.Byusingmedianfilter,Fouriertransformation,frequencyfilter,in2verseFouriertransformetc,the3Dheightinformationofthefirst2orderandsecond2ordergravitywavesatanytimewasa2chieved.Processingaseriesofpicturesinoneperiodthetimehistoriesweregainedatanypointofthewaves.Theworkisanewtrialtomeasurefreesurfacewaveinfluid2shellcoupledsystem,andtheexperimentalresultsareofsignificantrefer2encesforfurthertheoreticalstudy.Keywords:fluid2shellcoupled;3Dmeasurement;gravitywave;digitalImageprocessing(pp:168-170,178)Experimentalstudyonnoisesourcesidentificationofvehiclebasedonmicrophonearray