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基于时频相干函数的多跨梁损伤识别方法

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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.
Multi-span Beam Damage Detection Method Based on Time Frequency Coherence Function
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.

damage detectiontime frequency coherence functioncontinuous wavelet transform

张哲、缪炳荣、胡天棋、陈辉、张盈、赵浪涛

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西南交通大学牵引动力国家重点实验室,四川成都 610031

损伤识别 时频相干函数 连续小波变换

国家自然科学基金面上项目中央高校基本科研业务费-专题研究项目四川省重点研发项目牵引动力国家重点实验室自主课题项目牵引动力国家重点实验室自主研发项目

517754562682022ZTPY0072023YFG01972019TPL_T032023TPL_T08

2024

机械制造与自动化
南京机械工程学会 南京机电产业(集团)有限公司

机械制造与自动化

CSTPCD
影响因子:0.29
ISSN:1671-5276
年,卷(期):2024.53(2)
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