路面激励引起车内噪声的模拟和试验

本文建立了因路面不平度随机激励所产生的车内噪声的数学模型，借助了测得的车身悬置连接点的导纳函数，各连接点到车内耳旁位置的噪声传递函数以及悬置和轮胎参数，计算了由路面不平度所引起的车内耳旁噪声的大小，并将其与道路模拟机上的测量结果相比较，结果表明两者获得了较好的一致，还进一步分析了改变悬置和轮胎参数对车内噪声的影响，为车内噪声的分析、悬置参数的择优选取和汽车的声学设计提供了简易方法。

Simulation and Experiment of Automotive Interior Noise Caused by Road Irregularity Excitation

A mathematical model including the suspension and tire parameters is developed for analyzing the automotive interior noises caused by road irregularity excitation in this paper. The interior noises at driver's ear position are calculated by means of admittance functions at suspension mounting points, noise transfer functions from suspension mounting points to driver's ear and suspension and tire parameters. They are compared with the measured results on a road simulator. The results indicate that a good agreement is obtained. The effects of changing suspension and tire parameters on the automotive interior noises are discussed further. The research provides a basis for analysis of automotive interior noises, optimization of suspension parameters and automotive acoustic design.