风区挡风墙/屏影响下接触网设计风速计算研究  

Research on Calculation Method of Wind Speeds of Overhead Contact Line System under the Influence of Wind-break Structure in Wind Region

作　　者：刘改红[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9期90-93,共4页Railway Standard Design

基　　金：铁道部科技研究开发计划项目(2010G019-G)

摘　　要：铁路沿线设置的挡风墙/屏对风速影响显著,对风区考虑挡风墙/屏影响作用的接触网的设计风速进行计算研究。基于挡风墙/屏后接触线、承力索不同高度处的风速系数研究结果,采用支柱柱底弯矩等效法计算挡风墙/屏后结构设计风速计算用的风压变化系数,采用风偏等效法计算挡风墙/屏后运行设计风速计算用的风速变化系数;分别对结构基本风速、停轮风速进行考虑挡风墙/屏后风压或风速变化系数的修正,推导出风区挡风墙/屏影响下接触网结构设计风速、运行设计风速的计算方法及公式;并给出了兰新第二双线百里风区接触网设计风速的计算结果。Considering wind-break structure along railway line has contact line systems （OCS） seriously, this paper made a research speeds of OCS under the influence of wind-break structure in wind effect on the wind speed of overhead on the calculation method of the wind region. Based on the research results of wind speed parameters at different heights of both contact wire and messenger wire of OCS behind wind-break structure, the wind pressure variation coefficient used for structure design wind speed was calculated by using equivalent pillar-base bending moment method; and also the wind speed variation coefficient used for normal operation wind speed behind wind-break structure was calculated by using equivalent wind deflection method. And then, by using the wind pressure variation coefficient or wind speed variation coefficient behind wind-break structure to modify the structural basic wind speed and the work stoppage wind speed, the calculation methods and formulas about the structure design wind speed and the normal operation wind speed were deduced respectively. At the end of this paper, the calculation result of the two wind speeds of OCS for the second double-track on Lanzhou-Xinjiang High-Speed Railway within wind region of 100 km were given.

关 键 词：接触网 风区 挡风墙 屏 结构设计风速 运行设计风速 

分 类 号：U225.1[交通运输工程—道路与铁道工程]