摘要
采用Ansys软件建立了地铁线路小半径曲线区段的轮轨接触三维有限元模型,通过改变曲线半径、超高、轨底坡与轨距,分析曲线的几何形位对轮轨接触状态的影响。计算结果表明:在小半径曲线区段,车辆轮对轮缘容易与钢轨轨距角发生挤压,导致钢轨轨距角应力集中,加剧磨耗发展;随着曲线半径的增大,最大接触等效应力有所减小;超高设置应综合考虑曲线半径与行车速度,充分平衡列车通过小半径曲线时产生的离心力;随着轨底坡增大至1/20,轮轨配合更紧密,接触应力显著减小;适当加宽轨距可改善轮轨的匹配状态。
Ansys software is adopted to build a metro small-radius curve section wheel-rail contact 3D finite element model.By changing curve radius,superelevation,rail cant and rail gauge,the impact of curve geometry on wheel-rail contact is analyzed.Calculation results show that,in small-radius curve section,the wheelset flange can easily press against rail gauge head,significantly concentrating the flange force on the rail gauge head and worsening wear development.As curve radius increases,the maximum contact equivalent stress reduces.The superelevation setting should comprehensively consider curve radius and vehicle running speed,fully balancing the centrifugal force induced from train passing small-radius curve.With rail cant increasing to 1/20,the wheel-rail contact is more compact,and the contact stress is substantially reduced.Properly widening rail gauge can improve the wheel-rail interaction.
作者
龙静
张丹萍
叶淑琴
李仕游
王健
LONG Jing;ZHANG Danping;YE Shuqin;LI Shiyou;WANG Jian(Guangzhou Metro Group Co.,Ltd.,510330,Guangzhou,China;不详)
出处
《城市轨道交通研究》
北大核心
2022年第9期6-10,共5页
Urban Mass Transit
基金
国家重点研发计划项目(2017YFB1201202)。
关键词
地铁线路
曲线段
几何形位
轮轨关系
metro line
curve section
geometry
wheel-rail relation
