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ModernManufacturingEngineering201551212121NVH4011222401122。。。NoiseVibrationHarshnessNVH。TB53A1671—3133201505—0049—04PowerbasednoisereductiontechnologyforcommercialvehiclecabWangYong12LongWei12XiaTiequan121VehicleNVHＲesearchCenterChinaAutomotiveEngineeringＲesearchInstituteChongqing401122China2StateKeyLaboratoryofVehicleNVHandSafetyTechnologyChongqing401122ChinaAbstractSoundinsulationperformanceofthecommercialvehiclecabisexpressedinthecontextofvehicleridingcomfort．Intro-ducedtheprincipleofPowerBasedNoiseＲeductionPBNＲtechnologytheacoustictransferfunctionofacommercialvehiclecabistestedandthesoundinsulationiscalculatedbasedonthePBNＲtheorytheresultsshowedthereasonsaffectingthesoundinsulationperformanceofthecabandanairleakagetestisperformedtoverifiedtheaccuracyoftheresultsanalysissomepropos-alstoimprovethesoundinsulationperformanceofthecabareproposed．PracticeisprovedthatPBNＲtechnologyhasahighpre-cisionandplaysanimportantroleinguidingtheprocessofvehicleandsubsystemNVHpositivedevelopment．KeywordscommercialvehiclecabPowerBasedNoiseＲeductionPBNＲvolumeaccelerationsourceairleakagetest0。。。PowerBasedNoiseＲeductionPBNＲPBNＲ。1PBNＲPBNＲPBNＲPBNＲ1。PBNＲ1/329420155ModernManufacturingEngineeringPBNＲ=10lgΠp×p()*－10lgΠrefp2()ref1Πrefp2ref=1400ΠΠrefprefp*pp×p*。。ΠΠ=ρQa×Q*a/4πc2ρ、c20℃ρ=1．205kg/m3c=344m/sQa、Q*aQa×Q*a。21PBNＲPBNＲ=10lgQa()p×Qa()p[]*+10lg100ρπ()c3PBNＲ=－20lgpQa－9．54pQa1/3。、/、4。2PBNＲPBNＲ。。、、、、5/、//11。1111。1、2。12LMSLMSSCADASLMSTest．lab200～8000Hz。、、/4。、、、。3PBNＲ4、、、5/、//60520155。354/、//63、4。3434、、/。3200～2000Hz2000Hz。。4、/2500Hz。。。4PBNＲPBNＲ。PBNＲ。。。56。56/PBNＲ。。1。1/Pa/m3·h－1/L·s－1125．2338．1693．93229．3355．2198．67334．0373．97103．88439．2392．99109．16544．4412．63114．621520155ModernManufacturingEngineering144．4Pa114．62L/s60Pa。。2。2/Pa/m3·h－1/L·s－1124．2280．1577．82239．3336．1693．38349．2366．48101．80459．6396．97110．27567．6411．83114．40267．6Pa44．4Pa52．3%。。PBNＲ。PBNＲ。5PBNＲ。。1。。、、、、。。2。。6PBNＲPBNＲPBNＲ。PBNＲ。PBNＲ、。PBNＲ、NoiseVibrationHarshnessNVH。1．LMSPBNＲ．2006LMSC．2006．2ZhuJZhangQ．Power-BasedＲeductionTechniqueandItsApplicationtoSEAModeling．InterNoise2002C．Dear-bornMichigans．n．2002．、。E-mailwangyong0118@caeri．com．cn2014-02-1025