Please use this identifier to cite or link to this item: https://doi.org/10.1155/2015/290714
Title: Damage detection and quantification using transmissibility coherence analysis
Authors: Zhou, Y.-L 
Figueiredo, E
Maia, N
Perera, R
Keywords: Frequency response
Modal analysis
Numerical models
Better performance
Coherence analysis
Damage indicator
Detection and quantifications
Frequency response functions
Modal assurance criterion
Operational modal analysis
Real engineering
Damage detection
Issue Date: 2015
Publisher: Hindawi Limited
Citation: Zhou, Y.-L, Figueiredo, E, Maia, N, Perera, R (2015). Damage detection and quantification using transmissibility coherence analysis. Shock and Vibration 2015 : 290714. ScholarBank@NUS Repository. https://doi.org/10.1155/2015/290714
Rights: Attribution 4.0 International
Abstract: A new transmissibility-based damage detection and quantification approach is proposed. Based on the operational modal analysis, the transmissibility is extracted from system responses and transmissibility coherence is defined and analyzed. Afterwards, a sensitive-damage indicator is defined in order to detect and identify the severity of damage and compared with an indicator developed by other authors. The proposed approach is validated on data from a physics-based numerical model as well as experimental data from a three-story aluminum frame structure. For both numerical simulation and experiment the results of the new indicator reveal a better performance than coherence measure proposed in Rizos et al., 2008, Rizos et al., 2002, Fassois and Sakellariou, 2007, especially when nonlinearity occurs, which might be further used in real engineering. The main contribution of this study is the construction of the relation between transmissibility coherence and frequency response function coherence and the construction of an effective indicator based on the transmissibility modal assurance criteria for damage (especially for minor nonlinearity) detection as well as quantification. © 2015 Yun-Lai Zhou et al.
Source Title: Shock and Vibration
URI: https://scholarbank.nus.edu.sg/handle/10635/180121
ISSN: 1070-9622
DOI: 10.1155/2015/290714
Rights: Attribution 4.0 International
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