Damage detection in an uncertain nonlinear beam

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dc.contributor.authorVillania, Luis Gustavo Giacon [UNESP]
dc.contributor.authorSilvaa, Samuel Da [UNESP]
dc.contributor.authorCunha, Americo
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade do Estado do Rio de Janeiro (UERJ)
dc.date.accessioned2018-12-11T17:15:01Z
dc.date.available2018-12-11T17:15:01Z
dc.date.issued2017-01-01
dc.description.abstractThe present paper proposes the use of discrete time Volterra series expanded with Kautz filters for predicting the experimental response of a nonlinear beam, taking into account uncertainties that are inherent to the system. Nonlinear behavior is simulated considering large amplitude of vibration in a clamped-free beam, with a magnet near the free end to cause cubic sti-ness e-ect. The Volterra kernels and Kautz functions are estimated in a stochastic way, where the limits of confidence are established to the system response and used as a reference model to detect damage. The detection approach is based on a nonlinear stochastic index and hypothesis test, considering di-erent levels of simulated damage, associated with loss of mass. The results have shown that considering the uncertainties when identifying the model is very important in the process of damage detection and the nonlinear metric proved to be more appropriated to describe the system response with better results mainly in the nonlinear regime of motion.en
dc.description.affiliationUNESP - Universidade Estadual Paulista Faculdade de Engenharia de Ilha Solteira Departamento de Engenharia Meĉanica, Av. Brasil, 56
dc.description.affiliationUERJ - Universidade Do Estado Do Rio de Janeiro NUMERICO - Nucleus of Modeling and Experimentation with Computers, R. São Francisco Xavier, 524
dc.description.affiliationUnespUNESP - Universidade Estadual Paulista Faculdade de Engenharia de Ilha Solteira Departamento de Engenharia Meĉanica, Av. Brasil, 56
dc.format.extent2090-2095
dc.identifierhttp://dx.doi.org/10.1016/j.proeng.2017.09.480
dc.identifier.citationProcedia Engineering, v. 199, p. 2090-2095.
dc.identifier.doi10.1016/j.proeng.2017.09.480
dc.identifier.issn1877-7058
dc.identifier.scopus2-s2.0-85029905366
dc.identifier.urihttp://hdl.handle.net/11449/175257
dc.language.isoeng
dc.relation.isnodouble194522*
dc.relation.ispartofProcedia Engineering
dc.relation.ispartofsjr0,282
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectNonlinear dynamics
dc.subjectSHM
dc.subjectUncertainties quantification
dc.subjectVolterra series
dc.titleDamage detection in an uncertain nonlinear beamen
dc.typeTrabalho apresentado em evento

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Artigos - Engenharia Mecânica - FEIS