铁道科学与工程学报2018，Vol.15Issue(1)：24-30,7.
反射隔热涂料在无砟轨道上的适用性分析
Applicability analysis of the solar heat reflective and insulation coating for the ballastless track
摘要
Abstract
In order to find out the decreasing effect of the temperature and thermal stress of the ballastless track when the solar heat reflective and insulation coating was used, a calculation model considering the air temperature, solar radiation and wind speed for the temperature field of the ballastless track was established, and a field test was conducted to verify the calculation model. Then the influence of solar heat-reflective and insulation coating on the temperature of the bi-block ballastless track in Chengdu was analyzed, the thermal stress of the unitary and longitudinal ballastless track before and after using the solar heat-reflective and insulation coating were also calculated, respectively, and the effect of the wind speed on the temperature distribution of the ballastless track with solar heat-reflective and insulation coating was also analyzed. The results show that, the temperature distribution of the ballastless track can be obtained accurately and efficiently by this calculation model. After using this kind of coating, the temperature gradient of the concrete slab drops by 50%, while the whole track temperature remains almost unchanged. The curl stress of the unitary ballastless track decreases significantly when the solar heat-reflective and insulation coating is used. The decreasing effect of this kind of coating on the curl stress is not satisfying when the wind scale is larger than 4.关键词
无砟轨道/温度梯度/涂料/温度应力Key words
ballastless track/temperature gradient/coating/thermal stress分类
交通工程引用本文复制引用
李佳莉,康维新,孙泽江,刘学毅..反射隔热涂料在无砟轨道上的适用性分析[J].铁道科学与工程学报,2018,15(1):24-30,7.基金项目
国家自然科学基金资助项目(U1434208) （U1434208）
四川省科技支撑计划资助项目(2016GZ0333) （2016GZ0333）
