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1、优化车内噪声的工具和方法优化车内噪声的工具和方法Prof. Dr.-Ing. Klaus GenuitgHEAD acoustics GmbHKlaus.genuithead-acoustics.de Tools and methods for optimizing vehicle interior soundsKlaus Genuit1目录? 传递路径分析(TPA)?应用实例应用实例 ? 双耳板贡献量分析(BPCA) ? 车内噪声仿真车内噪声仿真?SoundCar?HEAD 3D Sound Simulation System H3S?Mobile H3S?Desktop simulator
2、 总结? 总结Tools and methods for optimizing vehicle interior soundsKlaus Genuit2传递路径分析receiversourcetransmissionairborne soundTransfer PathpTransfer Path Modelsourcesppp+Transfer PathReceiverap+Transfer Pathstructure-borne sound sourcesaTransfer PathTools and methods for optimizing vehicle interior soun
3、dsKlaus Genuit3p: pressure, a: acceleration传递路径分析故障诊断和声设计识别烦扰的噪声成份? 识别烦扰的噪声成份? 区分问题的根源是来自声源还是传递路径? 估计声学性能的改进潜力虚拟现实 / 虚拟原型虚拟现实虚拟原 ? 在驾驶模拟器中可以修改传递路径，互动式仿真 ? 组合模拟数据（CAE数据）、实测激励和传递模型组合模拟数据（数据）、实测激励和传递模型Tools and methods for optimizing vehicle interior soundsKlaus Genuit4TPA: 空气声灵敏度? 模型简单 ? 各方向的传递特征可用实p?
4、 各方向的传递特征，可用实 际声源测量也可以用扬声测 量 ? 置扬声器需要足够的空间p)( fpipreceiver / psourcepp)()()(fpfpfHsourcereceiver AB=Tools and methods for optimizing vehicle interior soundsKlaus Genuit5TPA: 声传递路径的互易测量? 一次可测量所有声源位置的 路径Q路径 ? 测量的只是声压，因此需要 加入辐射模型p)()()(fQfpfHsourceATF AB=radiation modelATF )()()(fQfpfQreceiverreceiver=
5、 pp/QQ/pp)( fQsourceTools and methods for optimizing vehicle interior soundsKlaus Genuit6结构声传递函数(ATF)? 力是产生结构噪声的根源 ? 力锤可测量感应力? 力锤可测量感应力.)()(fpfHreceiverATF )()()(fFfpfHsourcereceiver SB=pFATF pp/FFTools and methods for optimizing vehicle interior soundsKlaus Genuit7悬置传递函数? 间接法的优点： 可获取悬置信息aactive 可获取
6、悬置信息 ? 间接法的劣势: 没考虑路径之间的串扰.mountapassiveATFmountapparent mass papassive/aactivep/FF/apassiveaactiveTools and methods for optimizing vehicle interior soundsKlaus Genuit8间接法 (矩阵倒置)1 nnaFa Fa FafOMK11 12121111cabin( )( )( )fffAIF=1 = mmnaafMOOMOMMpleftprightengine FO1enginea1,x,y,za2,x,y,zF1,x,y,zF2,x,y
7、,zbodya3,x,y,za4,x,y,za5,x,y,zTools and methods for optimizing vehicle interior soundsKlaus Genuit9双耳传递路径分析 (BTPA)BTPA with MatrixBTPATools and methods for optimizing vehicle interior soundsKlaus Genuit10标准TPA没有考虑各方向和传感器之间的耦合. 表面质量和声学传递函数通过力锤激励的方式来确定.表面质量和声学传递函数通过力锤激励的方式来确定 对已存在的悬置，其悬置的传递函数在工作状态下获取a
8、ccelerationacoustical i tiapparenta m/sa m/sF Np Pa(operating conditions) before mountmount transfertransfer function (ATF) after mountinterior contributionapparent masses (AM) kgReferences: K. Genuit and W. Bray, “A Virtual Car: Prediction of Sound and Vibration in an Interactive Simulation Environ
9、ment”, 2001 SAE Noise & Vibration Conference Proceedings, Traverse City, Michigan. Tools and methods for optimizing vehicle interior soundsKlaus Genuit11gyg R. Sottek, K. Genuit, G. Behler and M. Vorlnder, “Description of broadband structure-borne and airborne noise transmission from power train”, P
10、roceedings of the FISITA 2006, Yokohama, 2006. 胎噪路噪分析Tools and methods for optimizing vehicle interior soundsKlaus Genuit1212胎噪分析: 结构声? 某紧凑车型在粗糙路面做45-35Km/h的减速滑行Measurement artificial head leftTPA stucture-borneTPA stucture-borne overdeterminationTPA1k2k1k2k1k2k1k2kf/Hz200500f/Hz200500f/Hz200500f/Hz
11、200500f50100f50100f50100f5010020 t/s517.5 L/dB(A)SPL20 t/s253042.5 L/dB(A)SPL20 t/s253042.5 L/dB(A)SPL20 t/s0515 20 L/dB(A)SPLTools and methods for optimizing vehicle interior soundsKlaus Genuit13引擎互换? B车引擎放在A车中会如何？ ? 预测结构声（无需安装引擎）? 预测结构声（无需安装引擎）?Car ACar B?Tools and methods for optimizing vehicle i
12、nterior soundsKlaus Genuit14引擎互换aTransfer PathReceivera1Transfer PathReceiverTPA model car ATPA model car Ba1aNp+Transfer PathTransfer PathReceivera1aNp+Transfer PathTransfer PathReceiverTPATools and methods for optimizing vehicle interior soundsKlaus Genuit15引擎互换aTransfer PathReceivera1Transfer Pat
13、hReceiverTPA model car ATPA model car Ba1aN+Transfer PathTransfer PathReceivera1aNp+Transfer PathTransfer PathReceiverpswap input signalsTools and methods for optimizing vehicle interior soundsKlaus Genuit16引擎互换:结构声预测600Diesel car TPA SBGasoline engine Diesel car TPA SBGasoline car TPA SB60060024040
14、0240400240400f/Hz100160f/Hz100160f/Hz1001604060/150045004060/150045004060n/rpm15004500n/rpm15004500 L/dB(A)SPLn/rpm15004500 L/dB(A)SPLn/rpm15004500 L/dB(A)SPL安装不同发动机的两同型号紧凑车: 汽油和柴油引擎Tools and methods for optimizing vehicle interior soundsKlaus Genuit17传递路径分析p(t) binauralstructure borneairbornebinaur
15、alSourceEarTransferSource SignalsEar SignalsTransfer FunctionsTime domain calculation captures time variant noise patterns!Tools and methods for optimizing vehicle interior soundsKlaus Genuit18刹车摩擦噪声的TPA结果Tools and methods for optimizing vehicle interior soundsKlaus Genuit19路径贡献量 前轴vehicle frontfron
16、tTools and methods for optimizing vehicle interior soundsKlaus Genuit20路径贡献量Tools and methods for optimizing vehicle interior soundsKlaus Genuit21双耳板贡献量分析NTFTPA:力 N车内噪声 SPLBlack Box目标: 通过激励点（关键悬置点的力激励）确定某些噪声 是从哪些板贡献的Tools and methods for optimizing vehicle interior soundsKlaus Genuit22体积速度的测量Microflown PU探头Tools and methods for optimizing vehicle interior soundsKlaus Genuit23体积速度测量质点速度传感器.)()(iiiAtv
