地震工程学报2017，Vol.39Issue(6)：1156-1160,5.DOI:10.3969/j.issn.1000-0844.2017.06.1156
基于小波包能量特征向量的结构动力响应损伤识别
Damage Identification Based on Structural Dynamic Responses Using Wavelet Packet Energy Eigenvector
摘要
Abstract
Monitoring structural dynamic responses is an important factor in structural health monitoring.When a building is subjected to certain vibration excitations,the structure will produce certain vibration responses.Once a structure is damaged,variations occur in its natural frequencies,stiffness,and damping values.The accurate determination of structural damage is a difficult engineering problem in the monitoring of structural dynamic responses.In this paper,we propose a method for extracting structural damage information and identifying structural damage based on the wavelet packet energy eigenvector.Utilizing the decomposed energy eigenvalue of each frequency band as a structural dynamic parameter,we determined differences in the struc-tural state by the observed variation in the energy value and obtained good results.We also ana-lyzed the experimental data with respect to the influence of noise on energy values.In an experi-ment,we found that the energy eigenvector can be used to identify the structural state and was free of noise.However,it could not be used to extract the energy feature vector after de-noising the observation signal.Therefore,we propose a method for accurately determining situations with structural damage,which is practical and can facilitate structural damage monitoring.关键词
结构监测/结构动力响应/损伤识别/能量特征向量/小波包Key words
structure monitoring/structural dynamic response/damage identification/energy eigenvector/wavelet packet分类
天文与地球科学引用本文复制引用
魏玉明,张永志,王涛,杨珍..基于小波包能量特征向量的结构动力响应损伤识别[J].地震工程学报,2017,39(6):1156-1160,5.基金项目
国家自然科学基金项目(41374028,40674001) （41374028,40674001）
甘肃省科技计划资助(1508RJZA094) （1508RJZA094）
建工七七基金(jk2015-29) （jk2015-29）
