城市轨道交通线路道岔区轨道刚度分布特征及均匀化研究  

On Distribution and Homogenization of Turnout Stiffness for Urban Rail Transit

作　　者：张艳平 姚力[2] 刘大园[2] 

机构地区：[1]东莞轨道交通有限公司,东莞高级工程师523000 [2]中铁二院工程集团有限责任公司,成都610031

出　　处：《城市轨道交通研究》2014年第9期29-34,共6页Urban Mass Transit

摘　　要：为了得出城市轨道交通无砟轨道岔区竖向刚度的分布规律,建立了道岔区轨道结构刚度有限元计算模型。模型中考虑了钢轨抗弯刚度、扣件刚度、基础刚度和滑床台、间隔铁、顶铁及辙叉区护轨等因素的影响。计算了铺设在整体道床上的9号固定辙叉道岔的整体刚度。仿真计算结果表明:道岔整体刚度沿线路纵向存在很大差异,其中辙叉范围刚度最大,转辙器范围刚度次之;非基本轨与基本轨整体刚度比最大约1.78,非基本轨整体刚度纵向变化率最大约188%。为消除铺设在无砟轨道上的道岔刚度不平顺,提出了相应的刚度均匀化方案,可大幅缓解岔区轨道刚度的不均匀现象。To study the distribution law of vertical track stiffness in turnout laying on urban rail transit ballastless track in urban rail transit, a calculation model based on FEM （finite element method） for track stiffness of turnout is established,in which the flexural stiffness of rails, fastenings and subgrade, the slide plate, the spacer block and the guard rail are all taken into account. The track stiffness of No. 9 turnout with a fixed frogis calculated,the result shows that the distribution of track stiffness of the turnout isseriously uneven： the maximum stiffness is within the range of frog,followed by the switch. The maximum ratio of total stiffness of the inner and stock rail is up to 1.78,and the longitudinal rate of total stiffness change of the inner rails is up to 188%. So, a homogenization project is proposed to make the track stiffness smoothly distributed along the longitudinal and transverse direc- tions of the turnout.

关 键 词：城市轨道交通 轨道结构 道岔区 刚度分布 均匀化 

分 类 号：U213.6[交通运输工程—道路与铁道工程]