Abstract：Based on the phenomenon of regular circumferential polygonal tire wear which appeared on the automobiles frequently travelling at high speed on high-grade road surface, the finite element model of high-speed rolling tire , which employed the Lugre friction model as well as 3D-tire model, was established. With this finite element model, the lateral self-excited vibration of tire tread and the function of influence factors on it were simulated and analyzed, which provided a theoretic foundation for reducing the tire’s self-excited vibration and polygonal wear. Simulation results show that the lateral self-excited vibration of the rolling tire does appear under certain conditions, which is also one of the reasons for polygonal tire wear. Sensitivity analysis shows that with the speed increasing, the intensity of lateral self-excited vibration of the tire first increases and then decreases, and self-excited vibration would not occur when the speed is too low or too high. Car toe angle and camber have the similar impact on self-excited vibration as speed, both of which have a peak value of self-vibration. In addition, the greater the load, the more severe the tread self-excited vibration, the more severe the tire wear. Consequently, to avoid the lateral self-excited vibration and to reduce tire polygonal wear, it is important to design suitably the control parameters as well as to choose the correct operating conditions.
2012, Vol. 31 
