铁道科学与工程学报2017，Vol.14Issue(5)：899-906,8.
桥上CRTSⅡ型板式轨道结构竖向温度场预估模型
The prediction model of vertical temperature field for CRTSⅡ slab track on bridge
摘要
Abstract
In this paper, a temperature field analysis model for CRTSⅡ slab track on bridge was established based on the heat transfer theory, in which the CRTSⅡ slab track on bridge was modeled as a multilayer system and the boundary condition of the model was considered. A prediction model of slab surface extreme temperature value, temperature difference and the structure inside temperature variation is put forward taking the length of sunshine time, daily radiation, daily average temperature, daily temperature difference as independent variables. The vertical temperature field distribution of CRTSⅡ slab track on bridge was analyzed. The results show that the temperature field distributions of the track calculated by theoretical model are good agreement with those by the experimental results; when the environmental factors change independently, the temperature extreme value and temperature difference of slab linearly change with the length of sunshine time, daily radiation, daily average temperature, daily temperature difference, and the temperature of the track inside change with the depth as cubic curve when the slab surface temperature takes the extreme value; Comparing with the experiment results, theory calculation results as well as the predicting results of the slab surface extreme temperature value, temperature difference and the structure inside temperature variation, the errors are less than 2%; the prediction model can be used to calculate the vertical temperature field distribution of the track based on the meteorological data, and is helpful to calculate the track temperature effect conveniently and accurately.关键词
CRTSⅡ型板式无砟轨道/传热学/温度场/气象数据/预估模型Key words
CRTSⅡ slab track structure/heat transfer theory/temperature field/meteorological data/prediction model分类
交通工程引用本文复制引用
黄志斌..桥上CRTSⅡ型板式轨道结构竖向温度场预估模型[J].铁道科学与工程学报,2017,14(5):899-906,8.基金项目
中国铁路总公司科技开发计划资助项目(2014G001-D) （2014G001-D）
南昌铁路局科技研究开发计划资助项目(201524) （201524）
