汽油车典型工况下车内噪声特征分析研究

A Study on the Noise Characteristics of a Gasoline Vehicle under Typical Operating Conditions

本文通过对某款汽油乘用车在加速、匀速、制动三种典型行驶工况的车内噪声特征进行试验研究,评价车辆在不同行驶工况下的车内噪声特征。首先分析了不同工况下车内不同驾乘人员位置的噪声声压级特征,结果表明车内驾乘人员不同位置耳旁噪声特征存在显著差异。接着对测试得到的车内噪声数据进行频域处理分析,得到车内不同驾乘位置噪声时频谱图。最后,对时频图进行分析获得车辆车内噪声声压级的分布规律。本文研究成果对车内噪声评价及选择最优化的车内噪声和振动控制方法提供了参考依据。

This paper conducts an experimental study on the noise characteristics of a passenger car under three typical driving conditions: acceleration, constant speed and braking. We evaluate the noise characteristics of the vehicle in different driving conditions. First, a comparative analysis of the noise sound pressure level characteristics of different driver and occupant positions in the car under different working conditions shows that there are significant differences in the ear noise characteristics of the drivers and occupants in the car at different positions. Then, we perform frequency-domain post-processing analysis on the noise data in the vehicle obtained by the test, and obtain the time-frequency spectrum diagram of the noise in different driving positions in the vehicle. Fi-nally, the time-frequency diagram is analyzed to obtain the distribution law of noise sound pressure level in the vehicle. The research results in this paper provide references for the evaluation of car interior noise and the selection of optimal interior noise and vibration control methods.