强侧风下接触网响应特性及弓网运行安全分析  

Analysis on Response Characteristic of Overhead Catenary System and Pantograph-Catenary Operation Security under the Action of Strong Sidewind

作　　者：刘长利[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道标准设计》2013年第2期105-109,共5页Railway Standard Design

基　　金：铁道部科技开发计划(2008J019)

摘　　要：采用非线性有限元分析软件建立接触悬挂模型,模拟强侧风工况,进行接触网风致响应特性及弓网运行安全问题分析。对简单链形悬挂、弹性链形悬挂进行风致位移对比分析,结果表明在接触网抗风性能方面简单链形悬挂较好;对4种典型接触悬挂组合的承力索与接触线风致水平位移进行同步性分析,得出接触悬挂最佳匹配张力;对不同跨距参数的接触悬挂进行风致位移对比分析,对照强侧风条件下的弓网运行安全评价指标,得出缩小跨距至45m以下确保安全、悬挂组合JTMH95+CTS150抗风性能较好等结论;对接触悬挂和支持结构进行风致应力响应分析,得出接触网防风薄弱点为接触线和承力索、吊弦、套管双耳、承力索座、定位器支座及定位线夹等零部件。This paper established the model of overhead catenary suspension by using nonlinear finite element analysis software, simulated strong sidewind environment, and analyzed the wind-induced response characteristic of overhead catenary system and pantograph-catenary operation security under the action of strong sidewind. Firstly, the contrast analysis of wind-induced displacement between simple catenary suspension and elastic catenary suspension was carried out, and its results show that the simple catenary suspension is better in the performance of withstanding wind Then through synchronism analysis of horizontal displacement of messenger wire and contact wire under four typical catenary suspension combinations, the best matching tension force of catenary suspension was obtained. And then through contrast analysis of wind-induced displacement for catenary suspensions with different span parameters, and through comparing with the evaluation indexes of pantograph-catenary operation security, this paper come to the conclusions that the security requirements could be ensured by narrowing the span below 45m; and the performance of withstanding wind of JTMH95＋CTS150 catenary combination is batter etc. Furthermore, through the analysis of wind-induced tress response upon catenary suspension and support structure, this paper obtained the results that there are the vulnerable points of withstanding-wind performance in overhead catenary system, including the messenger wire, dropper, cantilever tubes bracket, messenger wire bracket, locator bracket, steady arm clamp and other accessories.

关 键 词：强侧风 接触网 响应特性 防风 安全 

分 类 号：U225.2[交通运输工程—道路与铁道工程] U229