车辆轨道关键参数对高速铁路钢轨波磨发展的影响

Effects of Vehicle and Track Key Parameters on the Rail Corrugation of High-speed Railways

基于轮轨垂向动力学、轮轨滚动接触理论以及磨耗理论建立高速铁路无砟轨道钢轨波磨发展的理论计算模型,并发展出相应的数值仿真方法。其中轮轨垂向动力学模型包含高速车辆和高速铁路无砟轨道模型;采用Hertz接触理论和Carter二维轮轨接触理论计算轮轨切向力;利用摩擦功磨耗模型计算钢轨表面的磨耗。利用数值仿真再现了高速铁路钢轨波磨的演化过程,以此来研究车辆一系悬挂刚度以及悬挂阻尼,轨道扣件刚度、扣件阻尼以及钢轨硬度对高速铁路钢轨波磨发展的影响规律。结果表明:文中模拟所得的钢轨波磨波长特征与高速铁路上的波磨调查结果相符;较小的车辆一系悬挂刚度,适当的一系悬挂阻尼和扣件刚度,以及较大的扣件阻尼和钢轨硬度有利于抑制高速铁路钢轨波磨的发展。

Based on wheel-rail vertical dynamics, wheel-rail rolling contact theory and abrasion theory of materials, a calculation model of high speed railway rail corrugation is established and the corresponding numerical method is developed. The wheel-rail vertical dynamic model is established using the parameters of a corrugated ballastless high-speed railway. Hertz contact theory and Carter two-dimensional theoretical model of wheel-rail contact are used to calculate the wheel-rail contact force in normal and tangential directions. The wear of rail surface is determined using friction work. The development of the high-speed rail corrugation is reproduced numerically. The influence of some key parameters of high-speed vehicle and track, such as vehicle primary vertical suspension stiffness and damping, rail fastener stiffness, fastener damping and rail hardness, on the rail corrugation of high-speed railway. The results indicate that some range of the key parameters of high-speed vehicle and track will help to alleviate the development of corrugation on the high-speed railways.