考虑剪切变形的无缝线路轨道稳定性分析  

Analysis of the stability of continuously welded rail track considering shear deformations

作　　者：张向民[1] 陈秀方[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2006年第6期66-68,共3页Journal of Railway Science and Engineering

基　　金：铁道部科技开发计划项目(2004G05-A)

摘　　要：运用“荷载变形”关系,在考虑剪切变形的情况下进行无缝线路轨道稳定性分析,并推导出钢轨温度力计算公式。输入不同的轨道弯曲波长,找出最小的钢轨温度力,此值对应着最不利的变形波长l。此外,对是否考虑剪切力的2种情况进行对比。研究结果表明,剪切力对失稳极限温度压力的影响非常小,因此,在实际计算中可以忽略。The stability of CWR track is researched considering shear deformations. The temperature load of CWR track was deduced by the method of relation of load and deformation . Input different distortion wavelengths, the minimum temperature load of CWR track was calculated by the method of optimal. The minimum temperature load of CWR track corresponds to the unfavorable distortion wavelength. The results show the effects of shear deformations are very small. The shear deformations can be ignored in practice.

关 键 词：无缝线路 温度力 荷栽变形关系 稳定性 剪切变形 

分 类 号：U213.911[交通运输工程—道路与铁道工程]