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A two-step damage identification approach for beam structures based on wavelet transform and genetic algorithm

Content Provider	Springer Nature Link
Author	Ravanfar, Seyed Alireza Razak, Hashim Abdul Ismail, Zubaidah Hakim, S. J. S.
Copyright Year	2015
Abstract	A two-step damage identification approach based on wavelet multi-resolution analysis and genetic algorithm (GA) in beam structures is presented in this paper. The location of the crack is identified in the first step by defining the damage index called relative wavelet packet entropy. Then, the damage severities at the identified locations are assessed in the second step using GA. The wavelet packet component energies for each damage depth used in the first step and the severity evaluation database required for the second step to reveal the relationships between the energies and damage severities are obtained using a multi-resolution wavelet packet transform. The effects of wavelet type and decomposition level on the detection of damage location are examined in beams with various damage scenarios in the presence of different noise levels. To investigate the robustness and accuracy of the proposed method, numerical examples and experimental cases with different damage depths are considered. The results demonstrate that the proposed method performs reasonably well and has great potential in the identification of damage locations and estimation of damage severities.
Starting Page	635
Ending Page	653
Page Count	19
File Format	PDF
ISSN	00256455
Journal	Meccanica
Volume Number	51
Issue Number	3
e-ISSN	15729648
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-06-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Damage identification Wavelet packet transform Genetic algorithm Wavelet type Beams Mechanics Civil Engineering Automotive Engineering Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Mechanical Engineering

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