Analysis on Polygonal Wear of Automotive Tire of Lateralvertical Force Coupling Model

Abstract:

Considering the nonlinear characteristic of tire’s grounding friction,a dynamic model of tire’s lateralvertical force coupling is established based on LuGre friction model.According to selfexcitation theory,polygonal wear of tire is found to be related to lateral vibration of tire tread and the polygonal number is equivalent to the ratio of the lateral vibration frequency of tire tread to the rotational frequency of tire.The ranges of speed and toein angle which can motivate selfexcited vibration are given through simulation.The results show that this model can interpret the formation mechanism of the polygonal wear,and provide a theoretic foundation to reduce or eliminate the tire’s selfexcited vibration.