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.
出处
《工程力学》
EI
CSCD
北大核心
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)
关键词
扣件系统
轮轨
动力模型
振动特性
耦合动力学
fastening system
wheel and rail
dynamic model
vibration characteristic
coupled dynamics
