摘要
为研究现代齿轨铁路无砟轨道在列车纵向荷载作用下的力学特性并分析其结构的适用性,基于有限元理论建立现代齿轨铁路无砟轨道空间耦合计算模型,分析了轨道关键部件力学特性,并与有砟轨道进行对比。研究结果表明:齿轨铁路的钢轨纵向力、纵向位移均随轨道坡度、车辆编组数的增加而增大;齿轨根部等效应力最大,最大值小于材料屈服强度,不易对齿轨造成损伤;端刺结构可起到较好限位功能且不会因荷载过大而破损;无砟轨道的钢轨受力及变形、基础纵向位移等指标均小于有砟轨道,更适用于齿轨铁路。
In order to study the mechanical characteristics of ballastless track of modern rack railway under longitudinal train load and analyze its structural applicability,a spatial coupling calculation model of ballastless track of modern rack railway was established based on the finite element theory,and the mechanical characteristics of track key components were analyzed and compared with that of ballast track.The results show that the longitudinal force and displacement of the rack railway increase with the increase of the rail slope and the number of vehicle formation.The equivalent stress at the root of the rack rail is the largest,which is less than the yield strength of the material,so it is not easy to cause damage to the rack rail.The end thorn structure can play a better limiting function and will not be damaged due to excessive load.The stress and deformation of ballastless track and the longitudinal displacement of foundation are less than those of ballast track,which means the ballastless track is more suitable for rack railway.
作者
张乾
蔡向辉
蔡小培
张岷
ZHANG Qian;CAI Xianghui;CAI Xiaopei;ZHANG Min(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;China Railway No.1 Survey and Design Group Co.Ltd.,Xi’an 710043,China)
出处
《铁道建筑》
北大核心
2021年第5期115-119,共5页
Railway Engineering
基金
国家自然科学基金(51778050)
中铁第一勘察设计院集团有限公司科研项目(院科17-64)。
关键词
齿轨铁路
无砟轨道
数值模拟
纵向荷载
结构选型
轨道坡度
车辆编组
rack railway
ballastless track
numerical simulation
longitudinal load
structure selection
track grade
vehicle formation
