基于非赫兹接触理论的轮轨蠕滑力模型对车辆非线性稳定性的影响  

Influence of Wheel-rail Creep Force Model on Vehicle Nonlinear Stability Based on Non-Hertzian Contact Theory

作　　者：郑静 李娜 张宝安 ZHENG Jing;LI Na;ZHANG Baoan(CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Qingdao 266111,China;CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao 266131,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]中车青岛四方车辆研究所有限公司,山东青岛266031

出　　处：《铁道车辆》2025年第2期113-118,160,共7页Rolling Stock

摘　　要：轨道车辆非线性临界速度计算结果完全取决于求解轮轨接触问题的准确性,而轮轨接触力又对车辆-轨道系统运动有复杂且高度非线性的依赖性,如轮轨接触斑的形状、接触位置的局部弹性行为和摩擦效应。因此,轮轨蠕滑力建模对于评估车辆非线性稳定性至关重要。为了评估轮轨蠕滑力模型对轨道车辆非线性稳定性的影响,基于非赫兹接触理论建立了轮轨蠕滑力计算模型,利用降速法和BS EN 14363:2016标准确定了车辆非线性临界速度,并与赫兹蠕滑力模型的结果进行了对比。结果表明,轮轨蠕滑力模型对车辆的非线性稳定性评估有不同程度的影响,主要取决于轮轨接触斑的非椭圆化程度。相较于赫兹接触模型,非赫兹接触模型更适用于非线性稳定性评估,因为传统赫兹接触模型可能会在某些情况下错误估计车辆的动力学行为。The calculation results of the nonlinear critical speed of rail vehicles completely depend on the accuracy of solving the wheel-rail contact problem,and the wheel-rail contact force has complex and highly nonlinear dependence on the motion of the vehicle-rail system,such as the shape of the contact spot,the local elastic behavior of the contact position,and the friction effect.Therefore,wheel-rail creep force modeling is essential for evaluating vehicle nonlinear stability.In order to evaluate the impact of the wheel-rail creep force model on the nonlinear stability of rail vehicles,a wheel-rail creep force calculation model is established based on non-Hertzian contact theory.The nonlinear critical speed of vehicles is determined by the speed reduction method and BS EN 14363:2016 standard,respectively.The results are compared with those of the Hertzian creep force model.The results show that the wheel-rail creep force model has different degrees of influence on the nonlinear stability evaluation of vehicles,depending on the non-ellipticalization degree of the wheel-rail contact spot.In contrast to the Hertzian contact model,the non-Hertzian contact model is more apt for nonlinear stability evaluation,because the conventional Hertzian contact model may misestimate the dynamic behavior of vehicles in certain instances.

关 键 词：轮轨接触 蠕滑力 车辆动力学 非赫兹接触 蛇行稳定性 

分 类 号：U271.91[机械工程—车辆工程]