应用TPA法的路面结构噪声诊断及控制

TPA Method Application in Automobile Noise Pavement Structure

介绍了传递路径分析和工况传递路径分析的基本理论,建立了路面噪声传递模型,并运用传递路径模型找到具体的问题源。在监测振动源主被动端振动加速度及其传递路径的基础上进行了道路试验。运用传递路径分析方法得到的结果表明:在250 Hz以下拟合得到的声音与实测声压基本吻合,进而验证了传递路径模型的准确性。应用该模型缩小了传递路径的查找范围,并准确得出了人耳噪声在100~250 Hz的各传递路径的贡献量。

This paper introduces the basic theory of the work transfer path analysis and transfer path analysis,and establishes the working condition of transfer path analysis model and finds the specific problem of the source by using this method. On the basis of monitoring the vibration of main passive side vibration acceleration and its transmission path,it achieves the structure of pavement noise transfer path test. Transfer path analysis results show that under 250 Hz,the fitting method is consistent with the measured sound pressure near the main peak,and then it verifies the accuracy of the model. Based on this model,it narrows the scope of the search path and analyzes the human ear noise in 100 ~ 250 Hz contribution amount of each transmission path.