基于自激励振动理论的轮胎多边形磨损研究(英文)

Research on Polygonal Wear of Automotive Tire Based on Self Excitation Theory

建立轮胎-悬架-车身系统的考虑时间延迟的轮胎多边形磨损动力学模型,探讨基于自激励振动理论的轮胎多边形磨损现象。研究表明:轮胎多边形磨损是一种典型的非线性自激励振动,不同车型、不同轮胎磨损状况下,系统的自激励振动频率不同,常见频率区间为100～400 Hz;轮胎周向多边形磨损现象即自激励振动出现在特定的车速区间;轮胎多边形磨损的边数等于自激励振动系统的固有频率和车轮转动频率之比;轮胎在特定频段的固有频率对自激励系统振动有很大影响。

A tire-suspension-body mathematical model is established used by Twist-Beam Suspension, considering the time delay phenomena. Utilizing this model, the phenomena of polygonal wear of tire based on self excitation theory is discussed here. The results show that： The polygonal wear phenomenon is a typical nonlinear self-excited vibration; the frequency range of self-excited vibration fluctuated according to vehicle types and the status of tire worn. The common range of the frequency is from 100Hz to 400Hz; the phenomena of polygonal wear of tire （self-excited vibration） will generate when the velocity of a car is in a given range ; the polygonal number of the polygonal wear of tire is equivalent to the ratio of the natural frequency of the system of the self-excited vibration to the rotational frequency of tire; in the given range, the natural frequencies of tire have a big effect on the system of the self-excited vibration.