Abstract: For the rumbling problem complained by customers, noise and vibration detection are carried out by a front-rear drive vehicle as the research object. After analyzing the data, it is found that driveline order noise is the source. This paper makes a mechanical analysis between the source, transmission path and body response. According to the noise generation path, the potential solutions are listed and manufacture trial samples for verification. The results show that the control of key factors (vibration isolation rate, driveline mode) and noise suppression factor (eccentricity generated by assembly gap) are very effective to solve the problem of interior roar caused by residual dynamic imbalance of the driveline.

Key words: Rumble inside the vehicle; Order noise; Residual dynamic unbalance; Vibration isolation rate; Driveline modal

摘要： 以某前置后驱车为研究对象，针对客户抱怨的车内轰鸣问题进行了噪音和振动检测， 解析数据后发现，传动系阶次噪音对车内轰鸣声贡献最大。文章对传动系阶次激励的来源、 传递路径及车体响应进行了机理性分析，并根据轰鸣产生路径依次列出潜在解决措施并试制 样件进行验证。结果表明，管控关键因子（隔振率、传动系模态）、抑制噪音因子（装配间隙 产生的偏心量）对解决由传动系剩余动不平衡引起的车内轰鸣问题十分有效。

关键词: 车内轰鸣问题；阶次噪音；剩余动不平衡；隔振率；传动系模态