摘要
针对CRTSⅡ型板式无砟轨道结构基础变形问题,提出一种基于光纤振动加速度传感阵列的高速铁路无砟轨道基础变形监测方法。在某运营高铁线路路桥过渡段采用该方法进行现场实测,通过联合经验模态分解(EMD)-功率谱分析方法得到轨道结构的振动特性。测试结果表明:轮轨振动信号经过轨道板、CA砂浆层以及底座板的层层衰减后到达电缆槽内振动信号的峰值加速度与现有文献一致,说明该监测方法正确。该方法为高速铁路无砟轨道结构健康状况的长期监测提供了新思路,同时可为后续无砟轨道结构局部变形的病害识别以及趋势预测建立特征库。
Aiming at the deformation problem of the key section of CRTSⅡslab ballastless track foundation,the paper proposes a monitoring method of high speed railway deformation based on optical fiber vibration acceleration sensors.In a transition section of high speed railway,a fiber-optic vibration acceleration sensor array is used for field measurement,and the vibration characteristics of track structure are obtained by EMD(Empirical Method Decomposition)and power spectrum method.The test results show that the peak acceleration of the vibration signal in the cable is consistent with the existing literature after the wheel-rail vibration signal,proving that the monitoring method is correct.The new method provides a new idea for the long-term monitoring of the high speed railway ballastless track structure health,and established a feature library for the fault identification and trend prediction of local deformation of ballastless track structure of the high speed railway.
作者
郭高冉
崔旭浩
杜博文
GUO Gaoran;CUI Xuhao;DU Bowen(School of Civil Engineering,Wuhan University,Wuhan Hubei 430072,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;School of Computer Science and Engineering,Beihang University,Beijing 100191,China)
出处
《中国铁路》
2019年第11期60-67,共8页
China Railway
基金
中国铁路总公司科技研究开发计划项目（P2018G005-2）
关键词
高速铁路
无砟轨道
基础变形
监测
光纤振动传感技术
信号分析
high speed railway
ballastless track
deformation
monitoring
fiber optical vibration sensing technology
signal analysis
