基于地基干涉雷达的高速铁路桥梁运营性能检定  

Rating for Operational Performance of High-speed Railway Bridges Based on Ground-based Interferometry Radar

作　　者：高卓妍 邸昊 禚一 贾岩 刘淑一 张祥坤 GAO Zhuoyan;DI Hao;ZHUO Yi;JIA Yan;LIU Shuyi;ZHANG Xiangkun(Key Laboratory of Microwave Remote Sensing,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国科学院国家空间科学中心中国科学院微波遥感技术重点实验室,北京100190 [2]中国科学院大学电子电气与通信工程学院,北京100049 [3]中国铁路设计集团有限公司,天津300308

出　　处：《铁道学报》2023年第3期153-160,共8页Journal of the China Railway Society

基　　金：中国国家铁路集团有限公司科技研究开发计划(K2019G007);中国铁路设计集团公司科技开发课题(2020YY340619)。

摘　　要：目前应用最广泛的高速铁路桥梁检定方法为位移计、加速度计等接触式传感器,但其难以大量铺设,且工作效率低,每类传感器只能完成单一测量任务。而地基干涉雷达系统发射功率小、信噪比高、安装灵活,测量精度可达亚毫米级,一次测量即可完成多项桥梁参数检定的任务。利用矢量网络分析仪构建发射步进频率连续波信号的地基干涉雷达系统,对盐通高速铁路沿线的32 m简支箱梁桥进行实验。高速铁路检测车由310 km/h逐级提速至385 km/h,雷达系统可准确测量桥梁跨中的动挠度,进而分析其动力系数、挠跨比、强振频率、自振频率及阻尼比等参数。将仿真结果和拉线式位移计的实测结果与地基干涉雷达的实测结果进行综合对比分析,证明地基干涉雷达在高铁桥梁运营性能检定应用中的准确性和有效性。The most widely used rating methods for high-speed railway bridges are contact sensors such as displacement meter and accelerometer,which feature difficult installation in large numbers and low working efficiency,as each type of sensor can only complete a single measurement task.However,the ground-based stepped frequency continuous wave interferometry system,characterized by low transmitting power,high signal-to-noise ratio,flexible installation and measurement accuracy up to sub-millimeter level,ensures the completion of multiple bridge parameter rating tasks in a single measurement.Based on vector network analyzer,a ground-based interferometry radar system was constructed,which transmits stepped frequency continuous wave signals.A test was conducted on the 32 m simply supported box girder bridge along the Yancheng-Nantong high-speed railway.During the test,with the speed of the high-speed railway detection vehicle being gradually increased from 310 km/h to 385 km/h,the radar system accurately measured dynamic deflection of the bridge and analyzed the dynamic factor,deflection-span ratio,forced frequency,natural frequency and damping ratio.The simulation results and the measured results of the displacement meter were compared with the measured results of the ground-based interferometry radar,which proves the accuracy and effectiveness of the ground-based interferometry radar in the application of the operation performance rating of high-speed railway bridges.

关 键 词：地基干涉雷达 SFCW信号 高速铁路 简支箱梁 运营性能检定 

分 类 号：TN959.3[电子电信—信号与信息处理]