发动机声激励下的车内高频噪声分析

为研究发动机声激励下中高频噪声和整车声学包隔声性能,在VA One软件中建立整车统计能量分析模型和声学包模型,并进行基于能量的整车隔声量测试和发动机噪声采集试验,验证了整车模型的准确性.通过对驾驶员头部声腔和腿部声腔的输入能量贡献量分析,发现前围和地板是车内噪声的主要传播路径,为后续汽车声学包的优化设计和车内噪声控制提供了帮助.

Vehicle Interior High Frequency Noise under Engine Acoustic Excitation

In order to research the vehicle interior high frequency noise and the performance of sound package under the engine acoustic excitation ,the statistical energy analysis and sound package models were built with VA One software .Both the power-based noise reduction test and the engine noise measurement were conducted to verify the accuracy of vehicle model .The cowl panel and floor were identified to be the main noise transfer paths according to the energy contribution of driver head and leg a-coustic cavity ,which laid the foundation for the optimization of sound package and the control of vehicle interior noise in the fu-ture .