整车NVH声学包开发过程

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1、DevelopingaNVHPackagefortheVehicle整车NVH声学包开发过程RichardE.Wentzel理查德WuxiJixingAcousticAutoPartTechnologyCo.,Ltd.无锡吉兴汽车声学部件科技有限公司SetAggressivebutRealisticNVHPerformanceTargets设定一个富有挑战但又切合实际的NVH性能指标1.)MeasuretheNVHSources:Powertrain,Road/TireandWind.噪声源：发动机噪声、胎噪和风噪2.)Useoperatingcon

2、ditionswhichbringoutthebestandworstNVHattributes.通过各种操作条件来获取不同的NVH属性。3.)CollectNVHdatawhichisusefulforsettingtargets,andrevealspotentialdesignimprovements.收集对设计目标及设计改进有用的NVH数据。4.)Selectandtest“ImageVehicles”whichemulatetheNVHperformancebeingsought.选择并测试一辆性能较好的车型，寻找一个较好的NVH性能方案。

3、5.)Benchmarkingandvehicletear-downrevealseffectivedesignapproacheswhichminimizecostandweight.通过基准测试来获得最优的成本和重量的方案。On-RoadOperatingConditionsandTestProtocol一般道路上车辆行驶条件和测试协议citydriving60kphCruiseonSmoothRoadinDrive城市环境中驾驶在光滑路面上以60km/h的速度恒速行驶road/tire60kphCruiseonRoughRoadinDrive胎

4、噪在粗糙路面上以60km/h的速度恒速行驶road/tire&wind80kphCruiseonSmoothRoadinDrive胎噪和风噪在光滑路面上以80km/h的速度恒速行驶120kphCruiseonSmoothRoadinDriveroad/tire&wind胎噪和风噪在光滑路面上以120km/h的速度恒速行驶EngineWideOpenThrottleonSmoothRoadinSecond发动机噪声两档全全油门加速测试EnginePartThrottleonSmoothRoadinSecond、发动机噪声两档半油门加速测试road/ti

5、reCoastDownonSmoothRoadinNeutral胎噪空挡减速测试StationaryVehicleatIdleinDrive&NeutralEngine怠速测试（行车怠速和驻车怠速）发动机噪声SelectingASuitableTestRoadSurface选择一个合适的测试路面Driver'sRightEar@80KphOn-The-Road6055504540Pa35dB(A)30252015Curve-SmoothRoadinDrive58.3dB(A)93.4%AI-CoarseRoadinDrive63.8dB(A)84.6

6、%AI10-4000515719825031539750063079410001260158720002520317540005040635080001/3-OctaveBandCenterFrequency(Hz)NVHEngineersInspectingaRoughRoadSurfaceDriver'sRightEar@80KphinDriveontheRoad6560555045Roughroad40Pa35粗糙路面dB(A)3025smoothroad20光滑路面15SmoothRoad59.7dB(A)93.4%AI10CoarseRoa

7、d65.6dB(A)84.6%AI510203040506080100200300400600100020003000500010000HzInstrumentationSetUp测试仪器的设置WearablemicrophonesenableBinauraldatatobecapturedatthedriverpositionduringon-roadtests.头戴式麦克风可以获得驾驶员两耳位置的数据人工头可以帮助我们在回放噪声时能获取更精确的数据MicrophoneLocations麦克风车内的安装位置RightEarArtificialRig

8、htFrontTorsoPassengerRightEarLeftEarDriver2ndRowLeftPa