卡车胎近场噪声实验及仿真研究

随着汽车速度的提高以及电动汽车的推广,轮胎噪声在交通噪声中越来越彰显出来。以胎面振动及号筒效应等效辐射面分析卡车胎近场噪声机理,并通过实验获得卡车胎近场噪声特性,由近场声压数据表明轮胎噪声有很强的指向性;利用声全息实验获得轮胎噪声低频噪声与速度的相关度要大于高频噪声,卡车胎噪声主要以振动噪声为主,并进行滚动轮胎噪声仿真与实验结果对比。结合近场声压与声全息技术能有效获得轮胎近场噪声特性,并为优化轮胎设计、降低轮胎噪声提供科学依据和有利支撑。

Study on the near field noise of truck tire with test and simulation

With the increase of vehicle velocity and popularization of electric vehicle, tire noise is more and more remarkable in traffic noise. This article studies on the near field noise of truck tire with tread vibration and equivalent plane of horn effect. The characteristic of tire noise are acquired by test. The sound pressure test data show the directivity of noise which relevant with tire rolling speed. The acoustical holography data show low frequency noise is more relevant with tire rolling speed than high frequency noise, which means the truck tire noise mainly comes from vibration while no air pumping. And the comparison of simulation results and test results shows the directivity of truck tire noise can be obtained with near field sound pressure and acoustical holography. The work can provide scientific basis and powerful support for optimizing design of tire and decreasing noise.