严寒地区CRTSⅠ型板式无砟轨道温度场分析-《高速铁路技术》

文章信息/Info

Title:: Analysis on Temperature Field for CRTSⅠ Slab Ballastless Track in Severely Cold Region

作者:: 赵丽华; 赵世嘉; 张吉松; 刘思桐; 1. 大连交通大学, 辽宁大连 116028;
2. 北京交通大学, 北京 100044;
3. 大悦城控股集团股份有限公司, 沈阳 110000

Author(s):: ZHAO Lihua; ZHAO Shijia; ZHANG Jisong; LIU Sitong; 1. Dalian Jiaotong University, Dalian 116028, China;
2. Beijing Jiaotong University, Beijing 100044, China;
3. Joy City Holdings Northeast Region Company, Shenyang 110000, China

摘要:: 为研究严寒地区夏季、冬季极端天气条件下，CRTSⅠ型板式无砟轨道温度场分布问题，应用Abaqus有限元软件，基于气象数据和热传导理论，建立CRTSⅠ型板式无砟轨道三维瞬态温度场计算模型，分析板式无砟轨道横、竖向温度场分布情况。得到以下结论：（1）CRTSⅠ型板式无砟轨道瞬时温度场呈对称分布，轨道板内部温度场变化情况滞后于大气温度变化，其变化规律与大气温度变化规律相似，按正弦变化；（2）CA砂浆的热阻隔作用，使得无砟轨道温度场在轨道板与CA砂浆接触面发生温度跳跃现象；（3）无论冬季还是夏季，轨道板最大正温度梯度均出现在下午13：00时，且夏季轨道板最大正温度梯度比冬季大，夏季最大正温度梯度为73.2℃/m，冬季最大正温度梯度30℃/m；（4）CRTS Ⅰ型板式无砟轨道竖向温度呈非线性分布，且随着深度增加温度变化减小。

Abstract:: In order to study the temperature field distribution of CRTSⅠ slab ballastless track under extreme weather conditions in summer and winter in a severely cold region, this paper establishes a three-dimensional transient temperature field calculation model of CRTSⅠ slab ballastless track with the finite element software Abaqus based on meteorological data and heat conduction theory, and analyzes the horizontal and vertical temperature field distribution of slab ballastless track. The conclusions are as follows:(1) The transient temperature field of CRTSⅠ slab ballastless track is symmetrically distributed, and the change of temperature field inside the track slab lags behind the change of atmospheric temperature, and its change law is similar to that of atmospheric temperature, which changes according to sine. (2) The thermal barrier effect of CA mortar makes the temperature field of ballastless track jump at the interface between track slab and CA mortar. (3) The maximum positive temperature gradient of the track slab appears at 13:00 in both winter and summer, which is 73.2℃/m in summer and 30℃/m in winter.(4) The vertical temperature distribution of CRTSⅠ slab ballastless track is nonlinear, and the change of temperature decreases with the increase of depth.