基于多重相干法的汽车路面噪声分解

Road Noise Decomposition Based on Multiple Coherence Method

阐述多重相干法传递路径分析的基本理论、整车路面噪声分解试验分析流程和该方法适用工况。以某SUV汽车为分析对象,成功分解出运行工况下该车4个车轮对驾驶员左耳处噪声的贡献量,基于上述贡献量的合成噪声与实测噪声在整个分析频率范围内,绝对误差和平均误差均小于1 dB(A),使方法的有效性和准确性得到验证。

The basic theory of multiple coherence method is introduced.The process of experimental analysis of vehicle road noise decomposition and the applicable working condition of this method are elaborated.A SUV car is taken as the analysis object.Under the operating condition,the noise in the driver’s left ear is decomposed into the contributions of four sound sources:the left front wheel,the right front wheel,the left rear wheel and the right rear wheel.It is found that the difference between the synthetized noise of the four contributions and the measured noise is within 1 dB(A)in the analysis frequency range.The accuracy and effectiveness of this method are verified.