胎面结构设计参数对轮胎振动噪声的影响

Influence of tread design parameters on tire vibration noise

为了研究胎面结构设计参数对轮胎振动噪声的影响及降噪机理,以295/80R22.5载重子午线轮胎为研究对象,利用模态声学向量技术对轮胎振动噪声进行模拟分析,采用面板声学贡献度分析方法研究在噪声声压峰值所对应频率下轮胎外轮廓各部件的声学特性,找到胎面为主声学正贡献部件.选取显著影响胎面结构的参数为设计变量,通过正交试验法分析各参数改变对轮胎振动噪声的影响规律.结果表明,轮胎振动噪声随带束层端点至旋转轴半径以及胎冠点至旋转轴半径的增大而减小,随带束层压力分布形状系数以及带束层压力分担率的增加先减小后增加.通过正交试验极差分析得到低噪声轮胎的最优胎面参数组合,并从轮胎各部件对振动噪声的贡献度角度揭示了低噪声轮胎的降低机理.

The radial heavy duty tire 295/80R22.5was taken as the object of the research,in order to research the effects of tread design parameters on tire vibration noise and the mechanism of noise reduction.Tire vibration noise was computed by using modal acoustic transfer vector technolog.Then the acoustic characteristics of tire outer contour panels at the peak frequency was analyzed using acoustic contribution method.Tread is the main acoustic positive panel.Parameters influence tire tread design were selected to analyze the effect of these parameters on tire vibration noise by orthogonal method.Results show that the tire vibration noise decreases;with the increase of the radius of the belt layer to the axis of rotation and the radius of tire tread to the axis of rotation,with the increase of the shape coefficient of belt layer pressure rate and the belt layer pressure rate,the tire vibration noise decreases at first and then increase.The optimal tread parameters of the low-noise were obtained by the orthogonal test range analysis.The reasons why the tire vibration noise was reduced were studied by means of acoustic contribution.