钢轨横移和轨下胶垫刚度对扣件弹条应力的影响  

Effects of Rail Lateral Displacement and Rail Pad Stiffness on Stresses of Rail Fastening Clip

作　　者：尚红霞[1] 陶功权[2] 沈火明[1] 温泽峰[2] 金学松[2] 张树峰[2] 

机构地区：[1]西南交通大学力学与工程学院,四川成都610031 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《润滑与密封》2014年第10期59-64,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(U1134202;51105318);教育部博士点基金项目(20130184110005);四川省科技支撑计划项目(2011GZ0090)

摘　　要：选用福斯罗扣件弹条为研究对象,基于非线性接触理论,建立扣件系统有限元模型,确定弹条在安装状态下的危险区域,研究钢轨横移和轨下胶垫刚度对弹条危险区域的影响,并与现场弹条破坏位置对比。结果表明:弹条在安装完成后,弹条危险区域出现在弹条后端圆弧内侧的表层,弯曲和扭转起主要作用;随着钢轨横向位移和轨下胶垫刚度的变化,两侧扣件弹条最大等效应力和扣压力均发生明显变化。Based on nonlinear contact theory, a finite element model for Vossloh rail fastening system was established. The dangerous zone of the clip was found, and the influences of rail lateral displacement and rail pad stiffness on the dangerous zone was investigated. The numerical result was compared with the fracture location of the clip in the field. Results show that a local stress concentration in the clip is occurred at backend arc surface of the clip after the rail fastening clip is installed, and both bending and torsion play a major role. The rail lateral displacement and rail pad stiffness greatly affect the maximum equivalent stress and the clamping force of rail fastening clip.

关 键 词：扣件弹条 钢轨横移 轨下胶垫刚度 应力 

分 类 号：U213.531[交通运输工程—道路与铁道工程]