曲线区段受电弓-接触网系统建模及动态性能分析  

Modeling and Dynamic Performance Analysis of Pantograph-catenary System in Curved Railway Track

作　　者：熊嘉铭 徐钊[1] 鲁小兵 刘志刚[1] 宋洋 XIONG Jiaming;XU Zhao;LU Xiaobing;LIU Zhigang;SONG Yang(National Rail Transit Electrification and Automation Engineering Technique Research Center,Southwest Jiaotong University,Chengdu 610031,China;Electrification Design&Research Institution,China Railway Eryuan Engineering Group Co.Ltd.,Chengdu 610031,China;Department of Structural Engineering,Norwegian University of Science and Technology,Trondheim 7491,Norway)

机构地区：[1]西南交通大学国家轨道交通电气化与自动化工程技术研究中心,四川成都610031 [2]中铁二院工程集团有限责任公司,四川成都610031 [3]挪威科技大学结构工程系,特隆赫姆7491

出　　处：《铁道学报》2022年第8期25-35,共11页Journal of the China Railway Society

基　　金：国家自然科学基金(U1734202);中铁二院科技计划(KYY2020132(20-22))。

摘　　要：由于曲线区段轨道存在外轨超高,受电弓-接触网系统空间几何位置相比直线区段有较大差异,导致弓网系统在曲线区段上的动力学行为不同于其在直线区段。因此,研究曲线区段弓网动态性能对于保障弓网受流质量具有重要意义。针对曲线区段弓网空间几何位置变化与受电弓倾斜运行状态,对世界坐标系下受电弓和接触网系统进行数学解析,并通过受电弓建模方案的对比仿真研究,证明弓网系统建模考虑曲线特性的必要性。基于曲线区段弓网模型,对弓网动态性能进行研究。结果表明:在曲线区段将拉出值设置成定值有利于弓网获得更好的动态性能,且该定值的大小不会对弓网动态性能产生明显影响。由于接触线在受电弓局部坐标系下的垂向静态位移大于其在世界坐标系下的垂向静态位移,导致接触力波动更加剧烈。通过频谱分析发现,随着列车运行速度增加,曲线区段接触力的高频成分能量显著增大,意味着较短的接触网周期性结构参数对接触力的影响加剧,传统评估标准中的低频接触力指标难以全面反映曲线区段弓网的动态性能。The super-elevation of outer rail in the curved track causes the difference of the spatial geometric position of the pantograph-catenary system from that of the straight section,which leads to different dynamic behaviors of the pantograph-catenary system.Therefore,the investigation of the dynamic performance of the pantograph-catenary in the curved track is of great significance to ensure a good current collection quality.In this paper,the mathematical analysis of the pantograph-catenary system in the world coordinate system was carried out according to the spatial geometric position change of the pantograph-catenary and the tilting of the pantograph.The comparison of the pantograph modeling scheme proved the necessity of including the curve characteristics in modeling of pantograph-catenary.Based on the curved track pantograph-catenary model,the dynamic performance of the pantograph-catenary was evaluated.The results show that a fixed value of stagger in the curved track is beneficial to the pantograph-catenary current collection quality.The fixed stagger value does not have a significant impact on the dynamic performance of the pantograph-catenary system.Because the vertical static displacement of the contact wire in the local coordinate system of the pantograph is greater than that in the world coordinate system,the contact force fluctuates more severely in the curved track.Through spectrum analysis,it is found that with the increase of train speed,the high-frequency component energy of the contact force in the curved track increases significantly,which means that the influence of the shorter catenary periodic structure parameters on the contact force is intensified.The low-frequency contact force assessment index in the traditional evaluation standard cannot fully reflect the dynamic performance of the pantograph-catenary system in the curved track.

关 键 词：受电弓与接触网 动态性能 曲线区段 有限元 频谱分析 

分 类 号：U264.34[机械工程—车辆工程] U225[交通运输工程—载运工具运用工程]