基于无缝线路失稳分析的地铁轨温预警限值  

Research of Alarming Rail Temperature Threshold of Metro Based on CWR Track Stability

作　　者：王欢[1] 徐田坤[2] 谷爱军[1] 江辉[1] 芦毅[2] 翁勇南[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京地铁运营有限公司,北京100044

出　　处：《都市快轨交通》2015年第6期71-75,80,共6页Urban Rapid Rail Transit

基　　金：北京市地铁运营有限公司科研项目(2013000510000009)

摘　　要：运用有限元方法建立直线和曲线有砟轨道无缝线路的稳定性分析模型,讨论道床横向阻力、线路初始不平顺等多个因素的影响,分析结果表明:当钢轨横向位移超过0.5 mm左右时,其增长的速率明显加大。因此建议综合考虑钢轨横向位移增长速率突变处的温升、我国规定的允许温升及计算温升作为高温时的轨温预警限值,并采取绿-黄-橙-红四级预警机制。FE models for stability of ballast CWR track analysis including tangent and curve are developed in the paper. The lateral resistance,the initial track misalignments and other factors are discussed. It was concluded that the change rate of rail lateral displacements increases significantly when the lateral displacements reach about 0. 5mm. It is recommended that the rail temperature rise should be considered due to sudden alteration of the change rate of rail lateral displacements,that the allowed rail temperature rise and the calculating temperature rise defined in China should be adopted as the alarming thresholds of rail temperature rise,and that a green-yellow-orange-red alarming system should be employed.

关 键 词：无缝线路 胀轨跑道 预警限值 轨温 有限元模型 

分 类 号：U231.9[交通运输工程—道路与铁道工程]