铁路牵引供电系统接触网结构的防灾分析  

Analysis on Disaster Prevention of Structure of Catenary in Railway Traction Power Supply System

作　　者：魏喆[1] 肖晓晖[1] 童雪梅[1] 柳亮[1] 

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072

出　　处：《铁道学报》2011年第6期31-34,共4页Journal of the China Railway Society

基　　金：铁道部科技研究开发计划(2009J007-E)

摘　　要：采用有限元方法,以铁路接触网的支持悬挂系统为研究对象,对其在风偏设计风速和结构设计风速下的风灾工况,10mm、20mm和30mm厚度的导线覆冰工况,以及覆冰、风载同时作用工况进行模拟,分析它的动态应力和位移响应,并校核结构强度和刚度,提出防灾建议。仿真结果表明:现有的接触网支持悬挂系统在大多数工况下,能够满足结构的强度和刚度要求,但在风速大于37m/s和覆冰厚度超过20mm的灾害条件下,接触线的挠度过大,此时应采取机车限速和及时除冰等相应措施。本文的研究结果可以为铁路牵引供电系统的防灾设计与运行提供必要的理论依据。The railway catenary supporting system was taken as the research object.Simulations of wind disasters were made with the ANSYS finite element method under the following working conditions：At the wind velocity in wind deviation design and the wind velocity in structural design,with wire ice accretion of the respective thickness of 10mm,2030mm,and with simultaneous acting of wire ice accretion and wind loading.The responsive dynamic stress and displacement were analyred and the structure strength and stiffness were checked.Suggestions for disaster prevention were put forward.The simulation results show as follows：The existing catenary supporting system meets the strength and stiffness requirements of the structure under most working conditions;however excessive deflections may be caused at wind velocities lager than 37m/s and with wire ice accretion thicker than 20mm,so measures such as train speed limitation and timely ice removal should be taken.Theoretical basis is provided for design and operation of disaster prevention for the railway traction power supply system.

关 键 词：接触网 防灾 结构强度 刚度 有限元法 

分 类 号：U225.4[交通运输工程—道路与铁道工程]