城市轨道交通牵引供电接触轨系统温度应力有限元分析

温度变化时接触轨内部会产生巨大的温度应力,严重时甚至会危及城市轨道交通牵引供电安全。结合目前应用较广泛的钢铝复合接触轨,基于有限单元法,采用三维软件SOLIDWORKS建模,并在有限元软件Ansys Workbench中对接触轨模型的温度应力进行了模拟分析。该模型考虑了卡爪、尼龙垫块及支座等构件的束缚影响,采用边界条件控制环境的温度变化,得到了接触轨内部温度应力场云图,并分析了此温度应力对绝缘支座的影响。研究结果可为接触轨系统中各构件的设计、优化、安装及检修提供参考。

Finite Element Analysis on Temperature Stress in Contact Rail System for Urban Rail Transit Traction Power Supply

The temperature stress inside contact rail system may damage the system when the temperature changes,and in the most serious condition,it will threat the safety of rail transit traction power supply.According to the widely used steel/aluminum composite contact rail,a 3D SOLIDWORKS model is established on the basis of finite element method,and a simulation analysis of the temperature stress inside contact rail system is conducted by using the finite element Ansys Workbench software.Then,the influence of temperature stress on insulated bearings is analyzed according to the cloud image of stress field obtained from temperature changes in the boundary condition control environment.The research results can provide a reference for the design,optimization,installation and maintenance of the components in contact rail system.