重载铁路轨道结构受力特性仿真分析  

Simulation Analysis on Mechanical Characteristics of Heavy Haul Railway Track Structure

作　　者：丁荣[1] 沈坚锋[1] 肖鑫[2] 许玉德[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]中国铁道科学研究院研修学院,北京100081

出　　处：《华东交通大学学报》2015年第3期36-41,共6页Journal of East China Jiaotong University

基　　金："十二五"国家科技支撑计划项目(201313AG20B00)

摘　　要：重载铁路朝大轴重、高运量、高密度的方向发展,对轨道结构提出了更高的需求。轨道结构在列车荷载作用下的受力特性与轨道部件尺寸、材料参数等有关。在已有研究基础上,充分结合朔黄铁路现场实测数据,采用有限元方法建立重载铁路轨道结构仿真模型,计算分析了不同轴重及不同轨道参数下的重载铁路轨道结构的受力特性(包括钢轨、轨枕、道床、路基面的弯矩、应力、变形等)。研究结果表明:列车轴重对钢轨位移与应力影响最大;采用Ⅲ型轨枕、减小轨枕间距有利于减小轨道结构受力;道床弹性模量对钢轨位移影响较大,而道床厚度对受力特性影响较小。With the development of heavy axle load, high volume and high density for heavy haul railways, there are higher demands on track structure. The mechanical characteristics of track structure under train loads are relat- ed to track dimensions and material parameters. Combined with field data of Shuohuang Railway, this study uses fi- nite element analysis method to make modeling and simulation of heavy haul railway track structure. The mechanical characteristics （including moment, stress and displacement） of heavy haul railway track structure under diffi- dent axle loads and diffident track parameters are calculated and analyzed. Results show that axle load has a huge influence on the displacement and stress of rail, the use of III -type sleeper and smaller sleeper spacing can help reduce the stress of track structure and elastic modulus has great impact on displacement of rails while ballast bed thickness has little impact on mechanical characteristics.

关 键 词：重载铁路 轨道结构 受力特性 有限元分析 

分 类 号：U213.212[交通运输工程—道路与铁道工程]