斜拉索基于DD-ACMD的在线时变索力识别

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中图分类号：U442.5 文献标志码：A

本文引用格式：，下涵镇等.斜拉索基于DD-ACMD的在线时变索力识别[J].华东交通大学学报，2025，42（6）：51-57.

Online Time-Varying Cable Force Identification ofStay Cables Based on DD-ACMD

YangJie’，BianHanzhen²，Liu Xun²，Lin Yibiao’， Zhuo Weidong² （1.Fujian Expressway TechnologyConsultingCo.，Ltd.，Fuzhou 35oo18，China; 2. College ofCivil Engineering，Fuzhou University，Fuzhou 3501o8，China）

Abstract： To achieve accurate online acquisition of time-varying cable forces incable-stayed bridges，a new method for real-time identification ofonline time-varying cable forces is proposed based on the data-driven adaptive chirp mode decomposition （DD-ACMD） algorithm. This method adopts the sliding window technique to update the vibration signal of the inclined cable，and determines its prior informationand target modal components through the power spectrum density （PSD） analysis of the vibration signal. Afterwards，the DD-ACMD algorithm wasused to identifythe instantaneous frequencyof thecable vibration，and the time-varying cable force of the inclined cable was calculated using the axial loading beam theory.The accuracy of the method was tested by a numerical case of inclined cable，and the results showed that the average eror in identifying the time-varying cable forces under high noise level is 0.45% ，with a maximum error of 1.84%

Key words： cable-stayed bridge; structural health monitoring; online cable force identification method; sliding window; power spectral density analysis

Citation format：YANG J，BIANH Z，LIU X，et al. Online time-varying cable force identification of stay cables based on DD-ACMD[J].Journal ofEast China Jiaotong University，2025，42（6）：51-57.

斜拉桥在长期服役过程中，受到各种可变荷载的作用，如交通荷载、波浪荷载、风荷载等，在这些可变荷载的作用下，斜拉索受力实时变化。（剩余9098字）