一种基于基线剔除的斜拉索索力识别算法研究  

Research on a Cable-force Recognition Algorithm based on Baseline Rejection

作　　者：黄雅茜 李小龙 姜克杰 周辉 李冰清 HUANG Ya-xi;Li Xiao-long;JIANG Ke-jie;ZHOU Hui;LI Bing-qing(ccCC Highway Consultants Ca.Ltd.,Beijing 100010,China;National Key Laboratory of Bridge Safety and Resilience,Beijing University of Technology,Beijing 100124,China;CCCC Civil Big Data Information Technology(Beijing)Co.Ltd.,Beijing 100026,China)

机构地区：[1]中交公路规划设计院有限公司,北京市10010 [2]北京工业大学桥梁工程安全与韧性全国重点实验室,北京市100124 [3]中交公规土木大数据信息技术(有限)公司,北京市100026

出　　处：《公路》2025年第4期108-115,共8页Highway

基　　金：国家重点研发计划项目,项目编号2023YFC3805700。

摘　　要：为提高在台风等高噪声环境下的斜拉索索力识别准确性,提出了一种基于基线剔除的局部最大值选峰算法。全自动振动谱基线矫正方法以Savitzky—Golay滤波器为主要手段,通过对振动谱的卷积迭代实现全自动基线校正。提出的拉索索力识别方法以张紧弦理论和全自动振动谱基线矫正方法为理论基础,以拉索振动的时域信号为输入,通过傅里叶变换、局部最大值选峰和线性回归输出拉索的振动基频。工程实例计算结果表明,该方法在低噪声环境下可以灵敏识别索力变化;在高噪声环境下可以有效降低噪声对斜拉索振动频域信号的影响,有效提高在恶劣条件下的索力识别准确性。In order to improve the accuracy of cable force identification of inclined cable in high noise environments such as typhoons,a local maximum peak selection algorithm is proposed based on baseline rejection in the paper.The fully automatic vibration spectrum baseline correction method uses the Savizky-Golay filter as the main means to realize the fully automatic baseline correction through the convolution iteration of the vibration spectrum.In this study,the proposed cable force identification method is based on the tension string theory and the automatic vibration spectrum baseline correction method,and takes the time-domain signal of cable vibration as the input,and outputs the vibration fundamental frequency of the cable through the Fourier transform,local maximum peak selection and linear regression.The calculation results of engineering practice show that the method can sensitively recognize the change of cable force under low noise environment,and under high noise environment,can effectively reduce the influence of noise on the frequency domain signal of cable vibration,and effectively improve the recognition accuracy of the cable under poor conditions.

关 键 词：桥梁工程 桥梁健康监测系统 斜拉索振动 斜拉索索力识别 基线剔除算法 选峰算法 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]