中南大学学报（自然科学版）2025，Vol.56Issue(2)：794-806,13.DOI:10.11817/j.issn.1672-7207.2025.02.031
基于Hertz接触应力的钢轨打磨廓形设计方法
Design method of rail grinding profile based on Hertz contact stress
摘要
Abstract
To alleviate the issues of accelerated rail wear and excessive contact stress,a profile design method aimed at optimizing wheel-rail contact stress was proposed.Based on Hertz contact stress theory,the relationship between contact stress and rail curvature radius was established.The maximum wheel-rail contact stress was taken as the optimization target,and the current maximum contact stress and the rail curvature radius at the point of maximum contact stress were calculated.Based on the current maximum contact stress,the ideal contact stress and the optimization range for the rail profile were determined.The rail curvature radius at the current contact point was adjusted to make the stress approximate the ideal contact stress,and the optimized rail profile was then derived through reverse calculation.A dynamic model of the vehicle-track coupling system was established,and the rail profile design method was evaluated from the perspectives of static wheel-rail geometric contact relationships,rail wear prediction,and vehicle dynamics.The results show that,compared to the standard 60 rail,the distribution of wheel-rail contact points is more uniform,with equivalent conicity and maximum contact stress reduced by 30.0％and 15.8％,respectively.The average wear depth on the rail top surface and the gauge corner is reduced by 4％and 24％,respectively.The lateral creep force between the wheel and rail is decreased,and the longitudinal creep force is also reduced,which helps to improve rolling fatigue contact and rail wear characteristics,with the maximum wear index reduced by 21.9％.The lateral and vertical forces between the wheel and rail remain largely unchanged,and the train's curve-passing performance is maintained,while the overall vehicle dynamics are optimized.In conclusion,the rail grinding profile design method based on Hertz contact stress demonstrates certain advantages and applicability,which can provide a reference for further optimization of rail grinding design methods.关键词
Hertz接触应力/钢轨轮廓设计/曲率半径/车辆动力学/钢轨磨耗预测/多体动力学Key words
Hertz contact stress/rail profile design/curvature radius/vehicle dynamics/rail wear prediction/multi-body dynamics分类
交通工程引用本文复制引用
陈迪来,孙庚辰,陆晨旭,王军平,李培刚,宋瑞..基于Hertz接触应力的钢轨打磨廓形设计方法[J].中南大学学报（自然科学版）,2025,56(2):794-806,13.基金项目
上海市科学技术委员会启明星计划项目(22YF1447600) （22YF1447600）
上海市"一带一路"中老铁路工程国际联合实验室项目(21210750300) （21210750300）
上海应用技术大学协同创新基金资助项目(XTCX2024-07)(Project(22YF1447600)supported by the Science and Technology Commission of Shanghai Municipality Qimingxing Plan Project （XTCX2024-07）
Project(21210750300)supported by the Shanghai"Belt and Road"China-Laos Railway Engineering International Joint Laboratory Project （21210750300）
Project(XTCX2024-07)supported by the Shanghai Institute of Technology Collaborative Innovation Fund) （XTCX2024-07）
