铁路钢轨扣件系统垂向动力模型及振动特性  

VERTICAL DYNAMIC MODEL AND VIBRATION CHARACTERISTIC OF RAIL FASTENING SYSTEM

作　　者：王开云[1] 蔡成标[1] 朱胜阳[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《工程力学》2013年第4期146-149,168,共5页Engineering Mechanics

基　　金：国家重点基础研究973课题(2013CB036206);国家自然科学基金项目(51075340);长江学者和创新团队发展计划项目(IRT1178)

摘　　要：该文针对铁路钢轨扣件系统,分别考虑了扣压件及垫层的弹性特性,并考虑了扣件系统中扣压件的预压力,建立了详细的垂向动力分析模型,并推导了钢轨受力方程,然后基于车辆-轨道耦合动力学理论,分析了扣件系统垂向振动特性,结果表明:扣压件及垫层的弹性变形均受预扣压力及轮轨动态相互作用力的影响,扣压件及垫层作用在钢轨上的力均含有预扣压力及轮轨力的成分。因此,在铁路轨道扣件系统的动力分析与设计研究中,有必要分开考虑扣压件及垫层的弹性特性。As for a fastening system of railway,a vertical dynamic model is established and the formulas of rail vertical forces are deduced in this paper by considering the elastic characteristic of the spring rods and rail pads,and taking the preload force into account as well.Then the characteristic of vertical vibration is analyzed on the basis of the theory of vehicle-track coupled dynamics.Results show that both the preload force and the wheel/rail interaction dynamic force have much effect on the elastic deformation of the spring rods and rail pads.The forces acted on the rail by the spring rods,being the same as the forces by the rail pads,have two parts of forces,such as the preload force and the wheel/rail interaction dynamic force.Thusly it is necessary to separately take the spring rods and rail pads into account in the process of analyzing and designing dynamic performance of the fastening system of railway.

关 键 词：扣件系统 轮轨 动力模型 振动特性 耦合动力学 

分 类 号：U212.3[交通运输工程—道路与铁道工程] U211.5