Damage Identification in Structures Based on Energy Curvature Difference of Wavelet Packet Transform
Joint Authors
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-05-28
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Damage identification is of tremendous significance in engineering structures.
One key issue in damage identification is to determine an index that is sensitive to the structural damage.
Current damage identification indices are generally focused on dynamic characteristics such as the natural frequencies, modal shapes, frequency responses, or their mathematical combinations.
In this study, based on the wavelet packet transform, we propose a novel index, the energy curvature difference (ECD) index, to identify the damage in structures.
The ECD index is the summation of component energy curvature differences after a signal is decomposed using WPT.
Moreover, two numerical examples are used to demonstrate the feasibility and validity of the proposed ECD index for damage identification.
Stiffness reduction is employed to simulate the structural damage.
The damage can be identified by the ECD index curve plot.
The results of the examples indicate that the proposed ECD index is sensitive to low damage levels because even 5% stiffness reduction can be apparently identified.
The proposed ECD index can be employed to effectively identify structural damage.
American Psychological Association (APA)
Wang, Pengbo& Shi, Qinghe. 2018. Damage Identification in Structures Based on Energy Curvature Difference of Wavelet Packet Transform. Shock and Vibration،Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1215279
Modern Language Association (MLA)
Wang, Pengbo& Shi, Qinghe. Damage Identification in Structures Based on Energy Curvature Difference of Wavelet Packet Transform. Shock and Vibration No. 2018 (2018), pp.1-13.
https://search.emarefa.net/detail/BIM-1215279
American Medical Association (AMA)
Wang, Pengbo& Shi, Qinghe. Damage Identification in Structures Based on Energy Curvature Difference of Wavelet Packet Transform. Shock and Vibration. 2018. Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1215279
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1215279