Study on temperature field of continuous ballastless track for high-speed railway

被引：0
|
作者：
Liu F. [1 ]
Zeng Z. [1 ,2 ]
Wu B. [1 ]
Zhang Z. [1 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] National Engineering Laboratory for High-Speed Railway Construction, Central South University, Changsha
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2016年 / 38卷 / 12期
关键词：
CRTSII slab track; Environmental factor; Finite element method; Heat transfer; Temperature field;
D O I：
10.3969/j.issn.1001-8360.2016.12.013
中图分类号：
学科分类号：
摘要：
A three dimensional temperature field analysis model of continuous ballastless track for high-speed railway was established by means of finite element method and heat transfer theory in this paper. With the temperature field of CRTSII slab as study object, based on the verification of the effectiveness of the model, the time-variant distribution law of the slab temperature field was analyzed. Meanwhile, the influences of some factors on the slab temperature field were studied, such as solar radiation, wind speed, thermal conductivity of CA layer, and change rate of environment temperature. The results showed that the slab temperature and temperature gradient changed with slab depth nonlinearly in different time. The lateral temperature gradient of the track slab was greatly influenced by the sunlight condition of the track slab side. The stronger the solar radiation absorption ability of the slab surface or the solar radiation was, the greater the temperature gradient of the slab was. Slab temperature gradient decreased with the increase of wind speed. The influence of CA layer thermal conductivity on the temperature field of the slab was small. The faster the environment temperature changed, the greater the maximum temperature gradient of the slab was. The research results can provide reference for the study of the temperature load of continuous ballastless track structure. © 2016, Editorial Office of Journal of the China Railway Society. All right reserved.
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页码：86 / 93
页数：7
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