Influence of wheel polygon wear on creep characteristics of subway train
In order to study the influence of wheel polygon abrasion on the contact creep characteristics of wheel and rail,based on the multi-body dynamics theory and rolling contact theory,a multi-body dynamic model based on subway train parameters is established,and the wheel tread wear index under multi working conditions is calculated,and the influence of the order and amplitude of wheel polygon on the wheel rail force,creep slip rate and creep force of high-speed train is analyzed.The results show that the creep rate and creep force will increase with the increase of polygon order and amplitude of wheel,and the wheel tread wear increases with the increase of train mileage.According to the standard of wheel rail vertical force index,according to the standard that the speed is less than 160 km/h and the wheel rail force should not be greater than 200 kN,the safety limit of polygon amplitude of 3-23 orders is determined under 80 km/h running speed of train.The results show that the safety limit of polygon amplitude decreases with the increase of order.
NETL
NSTL
万方数据
维普
