客货共线铁路12号可动心轨道岔线型优化  

Alignment Optimization for 12~# Movable Point Turnout of Railway for Mixed Passenger and Freight

作　　者：马莉[1] 

机构地区：[1]中国铁道科学研究院铁道科学技术研究发展中心,北京100081

出　　处：《铁道建筑》2016年第8期125-127,132,共4页Railway Engineering

摘　　要：采用多体动力学和非线性有限元仿真相结合的方式,针对客货共线铁路12号可动心轨道岔建立轮轨接触应力瞬态分析模型和车辆-道岔耦合动力学模型,分析不同轴重条件下的轮轨接触应力分布特性,得出货车直向和侧向通过道岔时的动力学响应,并针对曲尖轨提出5种线型优化方案。方案对比分析表明:为保证行车安全性并减小道岔养护维修工作量,在道岔长度不变的条件下,曲尖轨宜增大曲线尖轨半切线的相离距离;在相邻间距条件允许的情况下,曲尖轨更适宜采用切线线型并增大导曲线半径。Taking 12# movable rail turnout of mixed passenger and freight railway as an example,the transient analysis model of wheel-rail contact stress and vehicle-turnout coupling dynamic model were established by combining the multi-body dynamics and nonlinear finite element method,the wheel-rail contact stress distribution characteristics under difference axle load were analyzed,the dynamic response of freight train passing through turnout directly and laterally,and five optimization schemes of curved switch rail were proposed. Comparative analysis of the schemes showed that semi-tangent separating distance should be increased for curved switch rail with the same turnout length in order to ensure traffic safety and reduce the turnout maintenance and repair,the tangent alignment profile should be used for curved switch rail and the lead curve radius should be increased if adjacent spacing condition is permitted.

关 键 词：客货共线铁路 12号可动心轨道岔 线型优化 轮轨接触 动力学响应 

分 类 号：U213.6[交通运输工程—道路与铁道工程]