轮胎花纹噪声的发声机理

从声学理论和实验两方面对轮胎花纹噪声的发声机理进行了深入分析研究，得出花纹块的拍打撞击声、花纹沟的泵浦噪声、光面胎沙声及沟内气柱共鸣声是轮胎花纹噪声的主要噪声源。轮胎接地区域前沿、中央和后沿区由于各种因素生产振动所激发的辐射噪声强度以前沿区为最强，中央区次之，后沿区最小。在综合分析的基础上提出两条经验法则：一是轮胎花纹块的撞击声谱只和它的面积有关而与它的形状无关；另一条是花纹沟的泵浦噪声谱只和花纹

Sound Generating Mechanism of Tire Tread Patternp s Noise

The sound generating mechanisms of the tire tread patternps noise were investigated based on the acoustic theory and the experiment . It was found that the pat and impact sound from the tread blocks ,the pump noise from the grooves ,the swish sound from the smooth tread and the air column resonance from the grooves were the main noise resources ;the noise radiation energy by the vibration in the front ground contact area was the most strong ,that in the central ground contact area was the medium ,and that in the back ground contact area was the least. The two experienced rules were proposed based on the comprehensive analysis :a) the impact sound spect rum of the tread blocks was only relative to their area ,but not to their shape ;and b) the pump sound spect rum of the grooves was only to their length ,width and direction ,but not to their depth. Some noise generating mechanisms in dispute were reviewed.