无缝线路是铁路轨道结构的发展方向,在我国铁路上已铺设了三万多公里,其特点是钢轨内部存在温度力.温度力对轨道结构是一种破坏力,准确掌握无缝线路钢轨内温度力的分布与变化规律,对无缝线路轨道的设计、铺设、养护维修及保证铁路行车安全都有非常重要的意义.利用温度力图可系统地分析在不同状态下无缝线路钢轨内部温度力的分布与变化规律. Seamless track is the development direction of railway track structure, which has laid more than 30,000 kilometers on our country’s railways and is characterized by the temperature force inside the rail. Temperature force is a destructive force to the track structure and accurately grasps the seamless line The distribution and variation of temperature and force in rail are of great significance to the design, lay-up, maintenance and repair of railroad track and the safety of railway traffic.Using temperature map, Distribution and variation of temperature force inside rail.