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Mechanism and Conditions of the polygonal wear of Vehicle tire

Automotive Innovation 2018年第2期1卷 167-176页

作者： Shuguang Zuo Tianxin Ni Xudong Wu Yong Li Xianwu Yang School of Automotive Studies Tongji UniversityShanghai 201804China NVH Department Changan Auto Global R&D CenterChongqing 400023China

polygonal wear seriously decreases the lifespan of a tire of a passenger car and adversely affects vehicle dynamic *** present paper builds a model that reflects the dynamic contact characteristics of the tire and reveals the mechanism and conditions of polygonal wear of a *** model describes the dynamic contact behavior of the tread block and considers the characteristics of dynamic friction between the road and tread of a rolling *** numerical bifurcation analysis,the paper reveals the conditions for self-excited vibration of the tread,i.e.,the improper combination of the vertical load,wheel slip angle,tire pressure and vehicle speed considerably strengthen the lateral self-excited vibration of the tread,which is the direct vibrational source of abnormal circumferential polygonal *** polygonal wear of a tire occurs when a vehicle travels for a certain long distance at a so-called polygonal wear *** polygonal wear speed should induce lateral self-excited vibration on the contact tread of the tire and the frequency of the lateral self-excited vibration should be divisible by the rolling frequency of tire that is determined by the polygonal wear *** polygonal wear requires that the vehicle travels at a certain polygonal wear speed for a minimal distance to produce a stably developing polygonal wear pattern even for subsequent driving at variable speed.

关键词： tire polygonal wear Tread contact model Self-excited vibration wear calculation Bifurcation analysis

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