中文摘要：

为研究函数型摩擦系数对轮轨滚动接触行为的影响,建立三维轮轨高速滚动接触有限元模型,针对钢轨表面平顺和存在波磨两种工况,通过与库伦摩擦模型的结果对比,详细分析函数型摩擦系数对轮轨力、黏滑分布和接触区域滚动接触应力等接触行为的影响,为进一步研究轮轨材料的损伤机制提供依据。研究发现：（1）无论钢轨表面平顺还是存在波磨,函数型摩擦系数均不会影响法向接触解;（2）函数型摩擦系数会显著影响切向应力的分布,进而影响von Mises等效应力的幅值;（3）基于安定理论,非稳态滚动条件下,相比库伦型摩擦系数,函数型摩擦系数使轮轨表面材料更易遭受疲劳破坏。

英文摘要：

In order to study the influence of slip-dependent friction on wheel/rail rolling contact behavior,a 3D finite element model for the high-speed wheel/rail rolling contact was developed.Based on the two cases of wheel/rail smoothness and rail corrugation,this paper investigated the differences of wheel/rail contact force,stick-slip distribution and rolling contact stress between coulomb friction and slip-dependent friction,which can establish a solid basis for further study on the damage mechanism of wheel/rail materials.Simulation results showed that（1）regardless of smooth rail surface or rail corrugation,the slip-dependent friction had no influence on normal contact solutions;（2）the slip-dependent friction can produce a significant effect on the distribution of tangential stress,furtheraffecting the amplitude of von Mises effective stress;（3）based on shakedown theory,the wheel/rail materials are easily subject to fatigue failure in slip-dependent friction under non-steady rolling contact,compared with coulomb friction.