Abstract
Wheel re-profiling has frequently been used as a method for improving polygonal wheel wear. It is very necessary to set a reasonable re-profiling threshold. According to the actual wear state of the wheel, a wheel profile model considering the three-dimensional (3D) wear form of the polygonal wheel is established in this paper. The effect of the 3D polygonal wheel on vehicle system dynamics is analyzed. Based on the comprehensive dynamics characteristics of the vehicle, the re-profiling threshold of the polygonal wheel was studied under different amplitudes and orders of polygon. The results show that periodic coupled vibration occurs when there is 3D polygonal wear on the wheels, which deteriorates the vehicle dynamics characteristics. The vehicle system dynamics indexes vary considerably with the orders and amplitudes of polygonal wear. The re-profiling threshold decreases gradually from the increase in the orders and amplitudes of the polygon, which presents strong nonlinear characteristics. In general, when the order of wheel polygon is less than 4, the re-profiling threshold is less than 0.2mm. These studies improve the understanding of the effects of polygonal wheel wear and provide theoretical guidance for the determination of the re-profiling threshold.
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