路面平整度对小汽车噪声的影响研究

Research on Influence of Pavement Roughness on Noise of Car

噪声作为交通环境污染的主要类型之一,正呈现出越来越严重的趋势。国内外大量研究表明,车辆在城市道路上行驶时产生的噪声主要有动力噪声和轮胎噪声两部分。而平整度对这两部分噪声的噪声源都有重要的影响。本文主要研究的是城市道路中路面的平整度对小汽车的噪声产生的综合影响。结果表明,在正常行驶时(不固定排档),平整度与噪声间有明显的线性关系。这一结果使得交通噪声的预测精度得到了一定的提高。

As a major part of traffic pollution, noise is becoming more and more serious. A great number of researches indicate that traffic noise of urban road mainly includes these two parts： engine noise and tire/pavement noise. Undoubtedly, roughness of road influences not only engine noise and also tire/ pavement noise. This paper aims at studying the relation between International Roughness Index （IRI） and its general influence on car noise. It turned out that IRI and Noise have linear relation, if the car is in normal operation. This greatly improves the precision of traffic noise prediction.