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Accelerometer Measurements of Tire Tread Vibrations and Implications to Wheel-Slap Noise

机译：轮胎胎面振动的加速度计测量及其对车轮拍击噪声的影响

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摘要

There are many analytical and finite element models for predicting vibration of a tire tread. However, experimental verification of these models is limited because of the difficulties involved in measuring vibration near the contact patch of the tire. In this research, a set of experiments were conducted using a microaccelerometer mounted against the tire tread, in the center of the tread pattern. The tire was mounted on Purdue University's tire-pavement test apparatus, a machine that allows precise measurements of tire noise and vibration as the tire rolls over samples of actual pavement. Microphone and accelerometer signals were recorded to determine the influence of pavement parameters on tire-pavement noise generation mechanisms. The vibration measurement and signal processing techniques are verified by comparing the results to published studies. The relationship between vibration characteristics and noise was investigated as a tire rolls over contraction joints in Portland cement concrete pavements. We found that although travelling waves are generated at the leading and trailing edge of the contact patch, the speed coefficients of increased noise and traveling wave amplitude do not match, and the wave speed of the impulse is that of an inefficient radiator. Therefore, increased tread vibration is not a major cause of increased noise at contraction joints, and other mechanisms must be involved.
机译：有许多用于预测轮胎胎面振动的分析模型和有限元模型。但是，由于难以测量轮胎的接触面附近的振动，因此对这些模型的实验验证受到限制。在这项研究中，使用安装在轮胎花纹中央的轮胎上的微加速度计进行了一组实验。轮胎被安装在普渡大学的轮胎路面测试设备上，该设备可以精确测量轮胎在实际路面样品上滚动时的噪声和振动。记录麦克风和加速度计信号，以确定路面参数对轮胎路面噪声产生机制的影响。通过将结果与已发表的研究进行比较，可以验证振动测量和信号处理技术。在硅酸盐水泥混凝土路面中，轮胎在收缩缝处滚动时，研究了振动特性与噪声之间的关系。我们发现，尽管在接触补丁的前缘和后缘产生了行波，但增加的噪声和行波幅度的速度系数并不匹配，并且脉冲的波速是效率低下的散热器的波速。因此，胎面振动的增加不是收缩接头处噪声增加的主要原因，并且必须涉及其他机制。

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