车轮多边形情况下轮轨接触算法  

Contact Algorithm of the Polygonal High-speed Rail Wheels

作　　者：洪鹤鹏 杨起帆 戴源廷 朱彬 宋天浩 祁阅 HONG He-peng;YANG Qi-fan;DAI Yuan-ting;ZHU Bin;SONG Tian-hao;QI Yue(Beijing Rail Transit Operation Management Co,Beijing 100071,China;Urban Rail Transit Center,China Academy of Railway Sciences,Beijing 100081,China)

机构地区：[1]北京市轨道交通运营管理有限公司,北京100071 [2]中国铁道科学研究院集团有限公司城市轨道交通中心,北京100081

出　　处：《科学技术与工程》2023年第17期7533-7538,共6页Science Technology and Engineering

基　　金：中国铁道科学研究院集团有限公司科研开发基金(2021YJ289);铁科院(北京)工程咨询有限公司科研开发基金(2022ZXJ005)。

摘　　要：接触斑的法向应力分布是轮轨动力学分析和轮轨磨耗计算的基础。铁路车辆采用的磨耗型踏面出现多边形时,接触点处的轮轨横向曲率和纵向曲率都随接触位置的变化而变化,此时最常用的赫兹接触方法的精度难以保证。非赫兹方法的计算精度高,但其效率不能满足工程计算要求。应用非赫兹方法分析了车轮多边形引起的轮轨纵向曲率变化对接触斑的影响,发现当车轮多边形波长大于65 mm时,多边形对接触斑应力分布的影响可忽略不计。然后提出了改进的半赫兹方法,并对不同接触位置的接触斑形状和应力分布进行对比分析,结果表明:多边形波长大于65 mm时,改进的半赫兹方法在与非赫兹方法的结果保持一致的同时,大大缩短了计算时间。The normal solution of the contact patch is the base of vehicle system dynamics as well as wear calculation.When the wheel polygonization appears on the worn-type wheel of the train,the lateral and longitudinal relative wheel/rail curvature around the contact patch will vary significantly.The widely used Hertzian contact method will be imprecise because the strong hypothesizes cannot be well satisfied.The non-Hertzian method is precise,but its efficiency cannot meet the requirements of engineering calculations.The influence of the wheel polygonization on the contact patch was analyzed,then an improved semi-Hertzian method was proposed.By studying the shape and the pressure distribution of the contact patches at different contact positions,it is found that when the wavelength of the wheel polygonization is larger than 65 mm,the results of the improved semi-Hertzian method can agree well with the non-Hertzian method with reasonable computing time.

关 键 词：铁路车辆 磨耗型踏面 车轮多边形 接触算法 半赫兹接触 

分 类 号：U221[交通运输工程—道路与铁道工程]