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Article: A new Gibbs sampling based algorithm for Bayesian model updating with incomplete complex modal data

TitleA new Gibbs sampling based algorithm for Bayesian model updating with incomplete complex modal data
Authors
KeywordsGibbs sampling
Non-classical damping
Stochastic simulation
Bayesian model updating
Issue Date2017
Citation
Mechanical Systems and Signal Processing, 2017, v. 92, p. 156-172 How to Cite?
Abstract© 2017 Model updating using measured system dynamic response has a wide range of applications in system response evaluation and control, health monitoring, or reliability and risk assessment. In this paper, we are interested in model updating of a linear dynamic system with non-classical damping based on incomplete modal data including modal frequencies, damping ratios and partial complex mode shapes of some of the dominant modes. In the proposed algorithm, the identification model is based on a linear structural model where the mass and stiffness matrix are represented as a linear sum of contribution of the corresponding mass and stiffness matrices from the individual prescribed substructures, and the damping matrix is represented as a sum of individual substructures in the case of viscous damping, in terms of mass and stiffness matrices in the case of Rayleigh damping or a combination of the former. To quantify the uncertainties and plausibility of the model parameters, a Bayesian approach is developed. A new Gibbs-sampling based algorithm is proposed that allows for an efficient update of the probability distribution of the model parameters. In addition to the model parameters, the probability distribution of complete mode shapes is also updated. Convergence issues and numerical issues arising in the case of high-dimensionality of the problem are addressed and solutions to tackle these problems are proposed. The effectiveness and efficiency of the proposed method are illustrated by numerical examples with complex modes.
Persistent Identifierhttp://hdl.handle.net/10722/296142
ISSN
2023 Impact Factor: 7.9
2023 SCImago Journal Rankings: 2.363
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCheung, Sai Hung-
dc.contributor.authorBansal, Sahil-
dc.date.accessioned2021-02-11T04:52:55Z-
dc.date.available2021-02-11T04:52:55Z-
dc.date.issued2017-
dc.identifier.citationMechanical Systems and Signal Processing, 2017, v. 92, p. 156-172-
dc.identifier.issn0888-3270-
dc.identifier.urihttp://hdl.handle.net/10722/296142-
dc.description.abstract© 2017 Model updating using measured system dynamic response has a wide range of applications in system response evaluation and control, health monitoring, or reliability and risk assessment. In this paper, we are interested in model updating of a linear dynamic system with non-classical damping based on incomplete modal data including modal frequencies, damping ratios and partial complex mode shapes of some of the dominant modes. In the proposed algorithm, the identification model is based on a linear structural model where the mass and stiffness matrix are represented as a linear sum of contribution of the corresponding mass and stiffness matrices from the individual prescribed substructures, and the damping matrix is represented as a sum of individual substructures in the case of viscous damping, in terms of mass and stiffness matrices in the case of Rayleigh damping or a combination of the former. To quantify the uncertainties and plausibility of the model parameters, a Bayesian approach is developed. A new Gibbs-sampling based algorithm is proposed that allows for an efficient update of the probability distribution of the model parameters. In addition to the model parameters, the probability distribution of complete mode shapes is also updated. Convergence issues and numerical issues arising in the case of high-dimensionality of the problem are addressed and solutions to tackle these problems are proposed. The effectiveness and efficiency of the proposed method are illustrated by numerical examples with complex modes.-
dc.languageeng-
dc.relation.ispartofMechanical Systems and Signal Processing-
dc.subjectGibbs sampling-
dc.subjectNon-classical damping-
dc.subjectStochastic simulation-
dc.subjectBayesian model updating-
dc.titleA new Gibbs sampling based algorithm for Bayesian model updating with incomplete complex modal data-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ymssp.2017.01.015-
dc.identifier.scopuseid_2-s2.0-85013676944-
dc.identifier.volume92-
dc.identifier.spage156-
dc.identifier.epage172-
dc.identifier.eissn1096-1216-
dc.identifier.isiWOS:000395613100010-
dc.identifier.issnl0888-3270-

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