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研究目的:基于传热学的基本理论,采用有限元分析法,利用大型商业软件ABAQUS对板式无砟轨道结构在温度作用下的影响进行仿真计算,分析不同基础支撑形式及不同轨道板宽度和厚度对无砟轨道结构温度效应的影响,探讨温度变化对板式无砟轨道结构的影响规律,为无砟轨道的结构设计提供依据。研究结论:(1)温差变化和结构变形并非呈现简单的线性关系,而是温度越高,变形的变化幅度越大。(2)刚性基础支撑下由于温差而引起的轨道板的温度应力远大于弹性支撑下轨道板的温度应力,但是刚性基础支撑下由于温差而引起的轨道板的最大竖向位移差则小于弹性支撑下轨道板中的情况。(3)在相同的板厚温度梯度条件下,轨道板的变形量随板厚的增加而增大,随板宽的增大而增大。
Research purposes: Based on the basic theory of heat transfer, the influence of temperature on the slab ballastless track structure with large commercial software ABAQUS was simulated by finite element method. The influence of different basic support forms and different widths and thicknesses On the temperature effect of ballastless track structure, and discusses the influence of temperature on the structure of ballastless ballastless track structure, providing the basis for the structural design of ballastless track. The conclusions are as follows: (1) The temperature difference and the structural deformation do not show a simple linear relationship, but the higher the temperature, the greater the variation of the deformation. (2) The temperature stress of the track slab caused by the temperature difference under the rigid foundation support is far greater than the temperature stress of the track slab under the elastic support, but the maximum vertical displacement difference of the track slab due to the temperature difference under the rigid foundation support is less than that of the elastic support Under the track plate in the situation. (3) Under the same temperature gradient condition, the deformation of the track plate increases with the increase of plate thickness, and increases with the increase of plate width.