基于信号分离方法的桥梁车载振动传感器移动监测技术研究  

Research on Mobile Monitoring Techniques for Bridges Using Vehicle-Borne Vibration Sensors Based on Signal Separation Methods

作　　者：程俭廷 张悦 王身宁 林梓康 吴晓生 周军勇 CHENG Jianting;ZHANG Yue;WANG Shenning;LIN Zikang;WU Xiaosheng;ZHOU Junyong(Guangzhou Cheng'an Testing of Highway&Bridge Co.,Ltd,Guangzhou 510420,China;School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州诚安路桥检测有限公司,广东广州510420 [2]广州大学土木工程学院,广东广州510006

出　　处：《建筑经济》2024年第S01期742-749,共8页Construction Economy

基　　金：国家自然科学基金(52178280);广州市市校联合资助项目(SL2023A03J00897)。

摘　　要：为更好地从过桥车辆振动响应中识别桥梁频率,对比研究快速傅里叶变换FFT、变分模态分解VMD和连续小波变换CWT三种信号处理方法的应用效果。首先,介绍FFT、VMD和CWT三种信号处理方法的理论基础和应用流程;其次,通过车桥耦合数值分析算例,对比三种方法在利用车辆振动加速度响应识别桥梁多阶频率的效果;最后,通过缩尺车桥耦合模型试验,进一步研究三种方法的应用效果。To enhance the identification of bridge frequencies from the vibration responses of a passing vehicle,a comparative study was conducted to assess the effectiveness of three signal processing methods:Fast Fourier Transform(FFT),Variational Mode Decomposition(VMD),and Continuous Wavelet Transform(CWT).Initially,the theoretical foundations and application procedures of these three signal processing methods(FFT,VMD,and CWT)were introduced.Subsequently,numerical examples of vehicle-bridge interaction(VBI)were prepared for comparative analysis,wherein these three methods were employed to identify multiple bridge frequencies from the vehicle's acceleration.Finally,laboratory tests were conducted based on a designed scaled VBI system,and the performance of these three methods was compared.

关 键 词：桥梁工程 车载振动传感器 间接测量 频率识别 二轴车 有限元分析 模型试验 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]