基于时频相干函数的多跨梁损伤识别方法
Multi-span Beam Damage Detection Method Based on Time Frequency Coherence Function
张哲 1缪炳荣 1胡天棋 1陈辉 1张盈 1赵浪涛1
作者信息
- 1. 西南交通大学牵引动力国家重点实验室,四川成都 610031
- 折叠
摘要
为解决连续小波变换损伤识别方法受边界和约束干扰的问题,提出一种基于时频相干函数的结构损伤识别方法.该方法通过时频相干函数构造损伤识别指标对多跨梁进行损伤识别,能够有效降低边界和约束对损伤识别的干扰,提高损伤的定位精度.通过对梁模型的数值仿真分析与实验验证,结果表明:通过时频相干函数构造的损伤指标,有效地消除了连续小波变换所带来的边界效应和约束的影响,能够实现对多跨梁损伤的准确定位,且在噪声干扰下依然具有良好的损伤定位能力.
Abstract
A damage detection method based on the time frequency coherence function is proposed to address the continuous wavelet-based damage detection methods distorted by border and constrain distortion.With the proposed method,the damage detection on muti-span beam is realized based on time frequency coherence function,which can significantly reduce the distortion of damage detection caused by border and constrain and upgrade dasmage positioning accuracy.The results of numerical investigation and experimental verification on beam show that the proposed method can effectively eliminate the effect of border and constrain due to continuous wavelet transform,accurately position multi-span damage even under noise interference.
关键词
损伤识别/时频相干函数/连续小波变换Key words
damage detection/time frequency coherence function/continuous wavelet transform引用本文复制引用
基金项目
国家自然科学基金面上项目(51775456)
中央高校基本科研业务费-专题研究项目(2682022ZTPY007)
四川省重点研发项目(2023YFG0197)
牵引动力国家重点实验室自主课题项目(2019TPL_T03)
牵引动力国家重点实验室自主研发项目(2023TPL_T08)
出版年
2024
国家科技期刊平台
NSTL
万方数据