兰新高铁大风区接触网正馈线悬挂结构适应性分析

试验和运行经验表明,兰新高铁大风区接触网正馈线(AF线)疲劳磨损问题非常突出。通过理论结合实际的方法,利用有限元三维流体场仿真辅助手段,分析百里、三十里风区挡风墙后方大风运动特征及AF线风场内受挡风墙结构增速影响的运动特点,提出AF线受激励源干扰产生大幅振动的机理。利用现场样本空间数据累计及AF线V形悬挂铰接零部件的运动频次,提出AF线V形悬挂结构合理性设计的关键点及结构匹配重要性,以及限制零部件间磨损的有效措施。

Adaptability Analysis of Suspended Structure of Overhead Contact Line in Wind Areas along Lanzhou-Urumqi High Speed Railway

Experiments and operational experiences show that the fatigue wear problem of catenary feeder is very prominent in wind areas along Lanzhou Urumqi High-Speed Railway.In this paper,based on the combination of theoretical and practical methods and the finite element method of three-dimensional fluid field,the characteristics of wind movement behind the wind wall and the movement characteristics of AF line influenced by wind wall structure are analyzed in terms of a hundred-mile and a thirty-mile wind areas,and the mechanism of large amplitude vibration caused by excitation source interference of AF line is proposed.In accordance with the sample spatial data and the motion frequency of AF line 's V type suspension articulated components,key points in rational design of AF line's V type suspension structure and the importance of structure matching are put forward,and effective measures are listed to limit wear between components.