基于分布式光纤的刚体温度力监测技术  

Monitoring Technology of Rail Temperature Force Based on Distributed Optical Fiber

作　　者：刘艳芬 高少军 柴雪松 冯毅杰 王智超 暴学志 时佳斌 LIU Yanfen;GAO Shaojun;CHAI Xuesong;FENG Yijie;WANG Zhichao;BAO Xuezhi;SHI Jiabin(Zhongtie Science and Technology Development Co.Ltd.,Beijing 100081,China;Yongzhou Track Maintenace Division,China Railway Guangzhou Group Co.Ltd.,Yongzhou Hunan 425000,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中铁科学技术开发有限公司,北京100081 [2]中国铁路广州局集团有限公司永州工务段,湖南永州425000 [3]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2023年第4期6-9,共4页Railway Engineering

基　　金：国家重点研发计划(2022YFB2602905);中国铁道科学研究院集团有限公司基金(2021YJ084)。

摘　　要：针对无缝线路内部温度力引起的胀轨、断轨风险,提出了一种基于分布式光纤的刚体温度力监测技术,并开展了刚体温度力监测和钢轨不同部位的温度力测试试验。结果表明:利用分布式光纤可以监测到温度力作用下刚体的纵向位移和钢轨轨腰、轨底处的温度力分布;分布式光纤监测到的刚体在温度力作用下的最大纵向位移与百分表测量差值最大0.20 mm,相对误差为4.0%;温度力在轨腰处分布较均匀,在轨底处呈现扣件附近较大、其余位置较小的规律。A distributed optical fiber based rigid body temperature force monitoring technology was proposed to address the risk of rail expansion and breakage caused by internal temperature forces in continuous welded rail.Rigid body temperature force monitoring and temperature force testing at different parts of the rail have been carried out.The results show that using distributed optical fibers can monitor the longitudinal displacement of the rigid body and the temperature force distribution at the waist and bottom of the steel rail under the action of temperature force.The maximum longitudinal displacement of the rigid body monitored by distributed optical fiber under the action of temperature force has a maximum difference of 0.20 mm compared to the that by using dial gauge measurement,with a relative error of 4.0%.The temperature force is evenly distributed at the rail waist,with a pattern of larger near the fastener and smaller at other positions at the bottom of the rail.

关 键 词：无砟轨道 温度力 试验研究 分布式光纤传感 布里渊光时域分析 

分 类 号：U216.3[交通运输工程—道路与铁道工程]