基于阻尼层拓扑优化的车内噪声控制  

Interior Noise Control based on Damping Layer Topology Optimization

作　　者：张宇 杨家友[2] 韦正[2] ZHANG Yu;YANG Jiayou;WEI Zheng(School of Automotive Engineering,Chongqing Electronic Engineering Vocational College,Chongqing 401331,China;China Automotive Engineering Research Institute,Product Research and Development Center,Chongqing 401122,China)

机构地区：[1]重庆电子工程职业学院汽车工程学院,重庆401331 [2]中国汽车工程研究院股份有限公司,重庆401122

出　　处：《噪声与振动控制》2018年第6期101-104,共4页Noise and Vibration Control

基　　金：重庆电子工程职业学院校级科研资助项目(XJZK201710)

摘　　要：针对某车型3 WOT工况下车内前排加速轰鸣噪声控制问题,首先运用声振耦合仿真分析手段,获得车内前排噪声异常峰值频率。接着对此频率的模态贡献量进行分析,确定贡献量最大的模态阶次及其振型。然后以该阶模态振型最大节点处的频率响应最小化为优化目标,对车身壁板的阻尼层布局进行拓扑优化,使得前排噪声异常峰值下降约13 dB(A)。最后,通过实车测试,证明阻尼层优化设计方案使前排轰鸣噪声性能得到明显改善。研究表明,该阻尼层优化方法是一种有效的车内轰鸣噪声控制手段。The problem of the accelerating booming noise control in the front row of a car under 3-WOT working condition is studied. First of all, the abnormal noise peak frequency in the front row of the vehicle is obtained by means of acoustic-vibration coupled simulation analysis. Then, the modal contribution of this frequency is analyzed to determine the order and the shape of the modal which has the largest contribution to the noise. With minimizing the frequency response at the node where the mode shape is largest as the optimization objective, the topological optimization of the damping layer layout of the vehicle body is completed. The abnormal noise peak of the front row is decreased by about 13dB （A） after the optimization. Finally, through the actual vehicle state test, it is verified that the optimization design of the damping layer has obviously improved the booming noise performance of the front row. The proposed damping layer optimization method can be used as an effective control method of the vehicle booming noise.

关 键 词：声学 轰鸣噪声 拓扑优化 阻尼层 

分 类 号：U461.4[机械工程—车辆工程]