30吨轴重重载铁路轨道结构参数分析  

On the Structure Parameters of Railway Track for 40 t Axle-load Heavy Haul

作　　者：陈方舟 CHEN Fang-zhou(School of Engineering and Technology,Zunyi Normal University,Zunyi 563006,China)

机构地区：[1]遵义师范学院工学院,贵州遵义563006

出　　处：《遵义师范学院学报》2018年第2期97-100,共4页Journal of Zunyi Normal University

摘　　要：以30t货车轴重为例,运用有限元ANSYS软件建立曲线路段钢轨-轨枕-道床-路基的三维重载铁路线路模型,应用轨道结构相关参数如钢轨类型、扣件垂向刚度、道床弹性模量等对曲线路段轨道结构的静力响应进行敏感性分析。研究结果表明,采用重型钢轨可以明显减小钢轨受力,同时,其他轨道部件的受力也有相应程度的降低;扣件垂向刚度的增加可使钢轨轨头、轨底应力以及钢轨的垂向位移均有所减小,但道床应力、轨枕弯矩与路基面应力有所增加;道床弹性模量的增大可以减小道床垂向位移、钢轨轨头、轨底应力与路基面应力,但不利于道床与轨枕的受力。Taking 30t truck axle load as an example,the author uses the finite element ANSYS software to establish 3-D(iron railsleeper-roadbed)heavy load railway mapping mode.Parameters(such as rail-type,the vertical stiffness of the coupler,and elastic modulus of ballast track)relevant to railway are applied to make a sensitivity analysis of static response of track structure of curved section.The findings are as follows:adopting heavy steel-rail may reduce the rail-pressure obviously;meanwhile,the pressure of other parts of rails can also be reduced to a certain extent.The increase of vertical stiffness of fasteners may decrease the vertical displacement of rail head,rail-bottom pressure and steel-rail;and yet,the stress of track-bed,the moment of sleeper bending and subgrade stress may increase;the increase of elastic modulus of ballast track may lessen the vertical displacement of trackbed and the pressure of railhead,railbottom and subgrade,which is not good for the pressure of trackbed and sleeper.

关 键 词：重载铁路 轨道结构参数 有限元 力学特性 敏感性分析 

分 类 号：U239.4[交通运输工程—道路与铁道工程]