CRTSⅡ型板式无砟轨道温度分布与环境温度关系的试验研究  

Experimental Study on Relation Between Temperature Distribution in CRTS Ⅱ Slab-type Ballastless Track and Ambient Temperature

作　　者：高亮[1] 尤明熙 肖宏[1] 马卓然[1] 马重[1] 甘忠颖 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《铁道建筑》2016年第5期6-9,共4页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划(Z2013-G001;2014G001-A;2014G001-F);北京市大学生创新创业训练项目(150130018)

摘　　要：无砟轨道内部温度变化受外界环境温度变化的影响,为得到无砟轨道内部温度分布与外界环境温度之间的关系,对北京地区CRTSⅡ型板式无砟轨道模型进行长期温度监测。以实测无砟轨道结构温度为依据,研究无砟轨道内部温度变化规律,并对轨道板表面温度与环境温度关系进行研究。研究结果表明,温度在轨道结构内部分布不均匀,轨道结构内部温度跟随外部温度变化,轨道板表面温度跟随环境温度变化且二者关系为非线性。经多种拟合比选,采用4次多项式和指数分布的轨道板表面温度和环境温度关系的预测模型具有很好的预测精度。Given that the temperature of ballastless track fluctuates with the changes of ambient temperature,the paper performed long-term monitoring over CRTS Ⅱ slab-type ballastless track models in Beijing in an effort to obtain the relation between its temperature distribution and the ambient temperature.With the measured data at hand,the paper worked to study the changing pattern of internal temperature and at the same time looked into the relation between the slab temperature and the ambient temperature.The results show that the temperature distribution within the track structure is uneven.The internal temperature fluctuates with the slab temperature,while the relation between the slab temperature and the ambient temperature turns out to be a non4 inear one.After multiple fitting attempts,the prediction model,which applies 4 times polynomial and exponential distribution in the depiction of the relation between slab temperature and ambient temperature,delivers quite precise results.

关 键 词：无砟轨道 温度场 非线性拟合 预测模型 

分 类 号：U213.244[交通运输工程—道路与铁道工程]