中文摘要：

采用自开发轮胎半消声室混合噪声试验方法,将不同花纹类型试验轮胎依次安装在测试车辆右前轮位上,利用转鼓驱动测试轮胎,并利用放置在待测轮胎一侧的距轮胎接地中心1m、呈半圆形放置的9个传声器获取轮胎的近场噪声数据;利用放置在同侧但距离轮胎接地中心线7.5m、呈直线放置的5个传声器获取轮胎的远场噪声数据。相关性分析表明,60°位置处传声器测得的近场噪声与远场噪声之间的相关性最高,且两者之间的数值关系符合点声源的衰减规律,平均绝对误差不超过1dB。该相关性模型为用轮胎的室内近场噪声预测远场噪声提供了理论数据,使室内近场试验部分替代远场试验成为可能。

英文摘要：

In this study,the correlation between near-field noise and far-field noise of tires was investigated using a self-made semi-anechoic chamber.In the experiment,a series of tires with different patterns were tested.The test tire was mounted on the right front wheel and driven by a rotating drum.The near-field noise data were collected by 9 microphones which were fixed on a semi-circle centered at the test tire ground contact position and having a radius of 1m.Meanwhile,the far-field noise data were collected by 5 microphones which were also put on the same side of test tire and along a line 7.5m from the center line of test tire ground contact.The experimental test results showed that a high correlation existed between the near-field noise and far-field noise obtained by the microphone at 60° position,while the numerical relationship between the two obeyed the attenuation law of point acoustic source,and the average absolute error was less than 1dB.This correlation provided a theoretical basis of predicting the far-field noise with near-field noise,and made it possible to partly replace the far-field noise measurement with near-field measurement.