高速汽车驾驶员耳侧噪声贡献量分析

Contribution Analysis of Noise on Driver's Ear Side of High Speed Vehicles

汽车高速行驶过程中,车外气动噪声和轮胎辐射噪声对人耳侧的影响难以定量分析。利用高速公路试验结合传递路径分析的方法,研究汽车高速工况下车外相关位置气动噪声和轮胎辐射噪声的传递特性;对驾驶员耳侧的气动噪声和轮胎辐射噪声进行定量分析,计算出车外不同位置、类型噪声对驾驶员耳侧的噪声贡献量;分析车外不同类型噪声源的贡献量随车速的变化特性;将高速工况驾驶员耳侧拟合噪声信号与实测信号进行对比分析,确定了车外不同位置噪声贡献量在频域上的分布规律。

It is difficult to quantitatively analyze the contributions of aerodynamic noise and tire noise to the driver ' s ears side noise when the car is traveling at high speed. In this paper, based on the method of highway test combined with transfer path analysis, the transfer characteristics of aerodynamic noise and tire radiated noise at the relevant positions outside the vehicle are studied. The aerodynamic noise and tire radiated noise on the driver ' s ear are quantitatively analyzed. In addition, the noise contribution of different positions and noise types outside the vehicle to the driver's ear is calculated. Then, the variation characteristics of the contributions from the different noise sources are analyzed under different speeds. Finally, the fitted noise signal on the side of driver ' s ears under high speed condition is compared with the measured signal, and the distribution rule of noise contribution from different locations outside the vehicle is determined in frequency domain.