大风地区铁路接触网结构的非线性屈曲分析  

Nonlinear Buckling Analysis of Railway Catenary Systems in Strong Wind Area

作　　者：马佳骏[1] 曹树森[1] 邓斌[1] 刘晓红[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《机车电传动》2011年第2期25-27,52,共4页Electric Drive for Locomotives

基　　金：铁道部科技研究开发计划项目(2008J019)

摘　　要：以新疆铁路某大风地区接触网为研究对象,考虑接触网结构材料非线性和几何非线性效应,探讨了接触网有限元建模问题。利用有限元分析软件ANSYS的非线性分析功能,以Budiansky-Roth准则为屈曲失稳判据,对接触网结构进行非线性屈曲分析。对接触网施加横向风载荷后,计算并提取在结构高度、跨距、吊弦数3个结构参数不同情况下的屈曲风速值,根据数据结果分析3种结构参数对结构静态稳定性的影响,并确定了较为合适的结构参数。计算结果表明:提高接触网支撑结构的刚度可以获得较好的稳定性;结构高度和跨距对接触网承载能力影响较大,高度和跨距越小,静态稳定性越好;考虑结构刚度和受压变形,吊弦数取8个最为适宜。Based on catenary systems of Xinjiang railway in strong wind area, the effect of kinematic nonlinearity and material nonlinearity of catenary systems was considered, and the finite model of catenary systems was discussed. It analyzed the catenary systems in nonlinear buckling instability by using the nonlinear analysis module of the software package ANSYS and Budiansky-Roth criterion. The buckling wind velocity in different situations of structure height, span, and the number of hanger was calculated and extracted after loading horizontal wind on catenary systems. Then it analyzed the influence of three parameters on static stability of the structure and confirmed the appropriate structural parameters according to the data results. The calculation result showed that it could obtain preferable stability by increasing the stiffness of the catenary support structure. The structure height and span had a great influence on load bearing properties of catenary systems： the smaller height and span were, the better static stability was; and the most appropriate hanger number was 8 considering structural stiffness and compressive deformation.

关 键 词：大风地区 接触网结构 非线性屈曲分析 静态稳定性 结构刚度 

分 类 号：U225[交通运输工程—道路与铁道工程]