某汽油机正时罩盖辐射噪声的优化研究  

Optimization of Timing Cover of A Gasoline Engine to Reduce Radiated Noise

作　　者：宿朋 常明明[1,2] 白国栋[1,2] 秦少博 宋兆哲[1,2] 

机构地区：[1]长城汽车股份有限公司技术中心,河北保定071000 [2]河北省汽车工程技术研究中心,河北保定071000

出　　处：《柴油机设计与制造》2015年第2期32-35,共4页Design and Manufacture of Diesel Engine

摘　　要：基于某款发动机正时罩盖辐射噪声问题,通过对发动机整机进行有限元分析,并结合试验测试结果,找到了理论分析与实际测试的契合点;同时通过对物体本身模态频率的理论分析,找到了解决此问题的方法;最终通过发动机及整车的NVH试验,对改善方案进行了验证,辐射噪声分别降低9 d BA和8 d BA。To reduce the radiated noise from the timing cover of an gasoline engine, a finite elementanalysis of the whole engine was conducted according to the results of actual NVH test of the vehicle tolocate the noise source-engine timing cover. Then mode frequency of the cover was analyzed and thesolution to the problem was developed. Validated by NVH test, the solution can reduce the radiated noise ofthe engine and vehicle by 9 dBA and 8 dBA respectively.

关 键 词：汽油机 正时罩盖 辐射噪声 

分 类 号：U464.171[机械工程—车辆工程]