轮胎振动噪声结构传递路径分析

简要介绍结构传递路径分析的基本理论,在分析车轮激励力及其传递的基础上,建立了轮胎噪声的结构传递路径分析模型,进行了轮胎噪声的结构传递路径试验,得到车内目标点由结构传递的合成声,在300 Hz以下,合成结果与实测声压在主要峰值附近吻合很好。利用频谱贡献云图和矢量叠加图分析了各结构传递路径对车内噪声的贡献,并采用矢量叠加及数据对比的方式详细分析了25 Hz时各传递路径对目标点的声贡献,从传递路径的角度找出了对车内噪声起主导作用的环节,通过控制这些环节,可以降低由轮胎引起的车内噪声。

Structural transfer path analysis of tire vibration and noise

Basic theory of structure transfer path analysis was presented. On the basis of analyzing wheel excitation force and its transmission, structure transfer path analysis model of tire noise was built up, and the test of transfer path analysis is carried out. The coupled excitation force was estimated, and the synthesized structure-borne noise was got, which has a good agreement with test result below 300Hz. The sound contribution of each transfer path to interior noise was analyzed using spectral contribution nephogram and vector superposition chart. The transfer paths which play a leading role to interior noise were determined; the interior noise induced by tire can be reduced by changing characteristics of these paths.