A-1-A轴式动车安全通过小半径曲线限速分析  

Analysis on speed limit of the A1A power car when safely negotiating the small radius curve

作　　者：李敏[1] 罗赟[1] 杨勇军 

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 [2]南车戚墅堰机车有限公司产品设计部,江苏常州213011

出　　处：《电力机车与城轨车辆》2013年第5期35-38,共4页Electric Locomotives & Mass Transit Vehicles

基　　金：国家自然科学基金资助项目(51075339);四川省科技计划项目(2013GZ0032)

摘　　要：针对某A-1-A轴式动车组,采用多刚体系统动力学软件SIMPACK建立了该动车的动力学模型,对不同速度、超高、不平顺和曲线半径工况下动车通过小半径曲线动力学性能进行仿真分析,得出了动车通过不同半径曲线时理论最高通过速度。结果表明:动车通过小半径曲线时,最高限速主要受外轨超高、曲线半径、不平顺及横向力极限值等多因素的影响,当横向力在安全限值内时,其它指标均能满足要求,因此,动车通过具有不平顺小半径曲线限速按照最大轮轴横向力极限值进行评定;增加超高,可略提高动车曲线通过速度;增大曲线半径和改善线路不平顺,均可提高动车曲线通过速度。当线路条件很差时,不平顺是影响动车动力学性能的主要因素,减速不能改善运行安全性,应维修线路。According to the certain A-1-A EMU,using multi-rigid-body dynamics software SIMPACK to establish the dynamic model of the power car,a simulation analysis of the power car negotiating the small radius curve is done under the condition of different speed,superelevation,track irregularity and curve radius,and the theoretical maximum negotiation speed for the different curve radius is gained. The results show that the highest limited speed of the passing car on the small radius curve is mainly influenced by various factors, such as the superelevation of outer rail,curve radius,track irregularity and limit value of the wheel-rail lateral force,etc. As long as the wheel-rail lateral force does not exceed the safety limit value ,other dynamic indexes could also meet the requirement,therefore,the limited negotiation speed for the p^iwer car on irregularity small radius curve is evaluated in accordance with the maximum wheel-rail lateral force limit value. The increase of the superelevation can enhance the curve negotiation speed slightly. Larger curve radius and smaller track irregularity can also contribute to the speed improving during negotiating. When the track irregularity is too large ,it is the main factor affecting the dynamic performance of power car, and decelerating could not improve safety. The line should be maintained then.

关 键 词：动力学性能 动车 小半径曲线 限速 

分 类 号：U266.2[机械工程—车辆工程]