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Bayesian damage characterization based on probabilistic model of scattering coefficients and hybrid wave finite element model scheme
Yan,Wangji1; Chronopoulos,Dimitrios1; Papadimitriou,Costas2; Cantero-Chinchilla,Sergio1; Zhu,Guo Shu3
2019-10
Conference Name7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Source PublicationCOMPDYN Proceedings
Volume2
Pages2952-2958
Conference Date24 June 2019 through 26 June 2019
Conference PlaceCrete
Abstract

Ultrasonic Guided Wave(GW) has been proven to be sensitive to small damage. Motivated by the fact that the quantitative relationship between wave scattering and damage intensity can be described by scattering properties, this study aims at proposing a new probabilistic damage characterization method based on the scattering coefficients in tandem with hybrid wave finite element model (WFEM) scheme. The probabilistic distribution properties of the scattering coefficients estimated using measured ultrasonic guided waves in the frequency domain are inferred based on absolute complex ratio statistics. The theoretical scattering coefficients can be efficiently calculated using WFEM which combines conventional finite element analysis with periodic structure theory. Based on the probabilistic distribution of reflection/transmission coefficients, the likelihood function connecting the theoretical model responses containing the parameters to be updated and the measured responses are formulated within a unified Bayesian system identification framework to account for various uncertainties. The transitional Monte Carlo Markov Chain (TMCMC) is used to sample the posterior probability density function of the updated parameters. A numerical example is utilized to verify the accuracy of the proposed algorithm. Results indicate that the strategies proposed in this study can quantify the uncertainties of damage characterization.

KeywordBayesian Analysis Damage Identification Ultrasonic Guided Waves Uncertainty Quantification Wave Finite Elements
URLView the original
Language英語English
Scopus ID2-s2.0-85079054364
Fulltext Access
FWCI0.7550305
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Document TypeConference paper
CollectionPersonal research not belonging to the institution
Affiliation1.Institute for Aerospace Technology &,Composites Group,University of Nottingham,United Kingdom
2.Department of Mechanical and Industrial Engineering,University of Thessaly,Greece
3.Department of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei, Anhui,China
Recommended Citation
GB/T 7714
Yan,Wangji,Chronopoulos,Dimitrios,Papadimitriou,Costas,et al. Bayesian damage characterization based on probabilistic model of scattering coefficients and hybrid wave finite element model scheme[C],2019:2952-2958.
APA Yan,Wangji,Chronopoulos,Dimitrios,Papadimitriou,Costas,Cantero-Chinchilla,Sergio,&Zhu,Guo Shu.(2019).Bayesian damage characterization based on probabilistic model of scattering coefficients and hybrid wave finite element model scheme.COMPDYN Proceedings,2,2952-2958.
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