摘要
高速轮轨滚动接触行为涉及几何、材料和接触非线性,动态效应显著,加之轮轨缺陷引起的接触不平顺等诸多因素的耦合影响,以及轮轨缺陷的尺寸、形状、位置和分布的随机性特点,给准确求解高速轮轨系统的动态响应带来极大挑战。针对上述诸多困难,以车轮不圆顺为例,提出将其转换为轮轨接触位移不平顺的动态有限元仿真方法,该方法在考虑轮轨系统强非线性特征和动态效应影响的同时,能够较好地表征缺陷的随机性特点,并能够有效地求解轮轨接触应力/应变状态。
High-speed wheel-rail rolling contact behavior involves geometry,material and contact nonlinearity,with significant dynamic effect.With the coupling influence of many factors such as contact irregularity caused by wheel or/and rail defects,and the randomness of the dimension,shape,location and distribution of wheel and rail defects,it brings great challenges to accurately solve the dynamic response of high-speed wheel rail system.In view of the above difficulties,taking the wheel roughness as an example,a dynamic finite element simulation method is proposed to convert it into wheel rail contact displacement irregularity,which not only considers the strong nonlinear characteristics and dynamic effects of the wheel rail system,but also better characterizes the randomness of defects,and effectively solves the wheel rail contact stress/strain status.
作者
敬霖
刘凯
刘卓
黄志辉
Jing Lin;Liu Kai;Liu Zhuo(不详)
出处
《现代城市轨道交通》
2021年第2期1-7,共7页
Modern Urban Transit
基金
国家自然科学基金项目(11772275)
四川省科技计划项目(2019YJ0212)
中央高校基本科研业务费专项资金(2682018CX69)
牵引动力国家重点实验室自主课题(2019TPL-T11)。
关键词
铁路
轮轨滚动接触
车轮不圆顺
显式有限元法
动态效应
数值仿真
railway
wheel-rail rolling contact
wheel roughness
explicit finite element method
dynamic effect
numerical simulation
作者简介
敬霖(1984—),男,研究员。
