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

打开文本图片集

中图分类号：U271.91 文献标志码：B doi：10.20213/j.cnki.tdcl.2024.11.27.01

Abstract：：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，，whel-rail creep force modeling is essential for evaluating vehicle nonlinear stability.In order to evaluate the impact of the whel-rail creep force model on the nonlinear stabilityof rail vehicles，a whel-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-elipticalization 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.

Key words：wheel-rail contact;creep force;vehicle dynamics;non-Hertzian contact;hunting stability

蛇行运动是轨道车辆特有的现象，是车辆系统动力学的核心问题之一。（剩余7880字）