摩擦式缓冲器阻抗特性在列车纵向动力学中的应用  

Application of Dynamic Impedance Characteristics of Frictional Draft Gear in Longitudinal Train Dynamics

作　　者：齐朝晖[1] 黄志浩[1] 孔宪超[1] 

机构地区：[1]大连理工大学工程力学系,辽宁大连116023

出　　处：《铁道学报》2011年第12期27-32,共6页Journal of the China Railway Society

基　　金：国家自然科学基金(10972044)

摘　　要：缓冲器的动力学特性在较大程度上决定着列车纵向动力学性能。传统缓冲器的阻抗特性曲线未能完整描述阻抗力与缓冲器行程变化率之间的关系,并且存在间断点。在列车纵向动力学应用中,引起很多难以克服的困难。本文以摩擦式缓冲器为研究对象,利用接触力学方法,给出阻抗力与缓冲器行程变化率之间的关系;根据处理静摩擦开关效应的相关理论,提出一种处理阻抗力曲线间断点的实用方法。数值算例验证了所提方法的合理性。The dynamics characteristics of the draft gear determine the longitudinal train dynamics performance to a great extent.The relation between the resistance force and the penetration velocity obtained by traditional methods is not accurate enough.Moreover,the discontinuity with respect to the penetration velocity results in many insurmountable numerical difficulties in the longitudinal train dynamics applications.In this paper,on the basis of the achievement of contact mechanics,the modified model of frictional draft gear characteristics is presented,in which the discontinuity is smoothed according to the method of dealing with the switching effects in the Coulomb′s law.The numerical example validates the proposed method.

关 键 词：缓冲器 阻抗特性 间断点 静摩擦 接触 

分 类 号：TU270.34[建筑科学—建筑设计及理论]