小号码道岔扳动力随密贴段刚度变化规律研究  

Study on Change Rule of Switching Force of Small-sized Turnout with the Change of Closure Section's Stiffness

作　　者：马晓川[1] 王平[1] 

机构地区：[1]西南交通大学高速铁路线路工程教育部重点实验室,成都610031

出　　处：《铁道标准设计》2014年第5期12-14,20,共4页Railway Standard Design

基　　金：国家自然科学基金(51078320)

摘　　要：为研究小号码道岔扳动力随密贴刚度的变化规律,解决小号码道岔扳动力偏大的问题,基于变分形式的最小势能原理,建立尖轨和心轨的转换有限元模型,研究了随钢轨密贴段刚度变化,尖轨和心轨扳动力的变化规律。结论:钢轨的密贴段刚度较小时,钢轨密贴段刚度对牵引扳动力的影响可以忽略不计,密贴段刚度达到104N/m后,牵引点的扳动力随钢轨密贴段刚度的增大有一个较大幅度的增长,降低扳动力能够为小号码道岔使用小功率的转辙机提供基础条件。The aim of this study was to ascertain the change rule of switching force of small-sized turnout with the change of closure section＇s stiffness, so as to solve the problem of excessive switching force of small-sized turnout. Based on the theory of minimum potential energy, this study built the finite element models about switch rail＆#39;s transition and frog rail＇s transition, and researched the change rules of the switching forces of switch rail and frog rail with the change of closure section＆#39;s stiffness. Then this study came to the conclusion：when the closure section＆#39;s stiffness was small, it had a negligible effect on the switching force of traction point;after the closure section＆#39;s stiffness reached up to 104 N/m, there would be a considerable increase of the switching force of traction point with the increase of closure section＇s stiffness;reducing the switching force would lay a foundation for using small power switch machine in small-sized turnout.

关 键 词：小号码道岔 密贴段刚度 最小势能原理 有限元 

分 类 号：U213.6[交通运输工程—道路与铁道工程]