摘要
针对某轿车后排乘客耳旁噪声水平过高的问题,建立结构声学耦合有限元模型。通过声灵敏度分析得到左前悬架安装点位置为主要传递路径,利用板件贡献量分析,找到贡献量较大的板件。最终通过改进板件阻尼材料达到了降低噪声的目的,并得到试验验证。通过此方法,可以方便的得到贡献量较大的传递路径和贡献量较大的板件,为降低驾驶室噪声水平提供一种有效的评价和改进的手段。
For the problem of higher noise level at the rear passengers＇ ear, sound-structural coupling FEA model of vehicle was built. Then the main sonic transfer path at the left-front suspension setting location was obtained through acoustic sensitivity analysis, and the more contributing plates via PCA was found. Finally, the sound level was debased by improving damping material and which was proved by the vehicle performance test. By this way, the more contributing path and plates can be found conveniently and an effective way to evaluate and reduce the noise level of cab was provided.
出处
《噪声与振动控制》
CSCD
2012年第4期103-106,共4页
Noise and Vibration Control
