Influence of Wheel/Rail Dynamic Interaction Induced by Polygonal Wheels under Braking Condition

doi:10.3901/JME.2023.08.196

Abstract

Abstract: Wheel polygonal wear is the main excitation source of abnormal vibration of vehicle and track system, which will threaten the fatigue life of vehicle and track parts. A field test of polygonal wheels and vibration characteristics of locomotive was done to solve the abnormal vibration of locomotive and rolling stock system. The test shows that serious wheel polygonal wear will lead to severe vertical and longitudinal vibration of the locomotive wheelset. Based on the field tests, a three-dimensional dynamic model of heavy-haul train-track coupling system was established to study the influence of polygonal wheels on vertical and longitudinal dynamic action between wheel and rail under different braking conditions and wheel/rail contact friction conditions. The results show that during the braking condition of heavy-haul train, the polygonal wear of wheels not only intensifies the vertical impact between wheel and rail, but causes significant longitudinal wheel/rail interaction; under the low adhesion condition between wheel and rail, the wheel polygonal wear will lead to the significant rise of longitudinal creepage and fluctuation of longitudinal creep force, which can increase the risk of wear or fatigue damage of wheel and rail.

Key words: heavy-haul electric locomotive, polygonal wear of wheels, abnormal vibration, vehicle-track coupled dynamics, braking, wheel/rail rolling contact behavior

CLC Number:

U270

GUO Xin-ru, YANG Yun-fan, WANG Chao, LING Liang, WANG Kai-yun, ZHAI Wan-ming. Influence of Wheel/Rail Dynamic Interaction Induced by Polygonal Wheels under Braking Condition[J]. Journal of Mechanical Engineering, 2023, 59(8): 196-203.

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