Characterization of grazing bifurcation in airfoils with control surface freeplay nonlinearity

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dc.contributor.authorVasconcellos, Rui M. G. [UNESP]
dc.contributor.authorAbdelkefi, Abdessattar
dc.contributor.authorMarques, Flavio D.
dc.contributor.authorHajj, Muhammad R.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionVirginia Tech
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2015-11-03T18:25:41Z
dc.date.available2015-11-03T18:25:41Z
dc.date.issued2014-01-01
dc.description.abstractA variety of nonlinear features is obtained from aeroelastic systems with discontinuous nonlinearity motivates investigations that may support future applications in controls design, flutter prediction problems, and energy harvesting exploration. The freeplay nonlinearity leads to bifurcations and abrupt response changes which can result in undesirable or catastrophic responses. Grazing bifurcations of limit cycles are one of the most commonly found discontinuity-induced bifurcations (DIBs) and are caused by a limit cycle that becomes tangent to the discontinuity boundary of the available piecewise-smooth function. The abrupt transition from periodic to aperiodic is directly related with the discontinuous nature of freeplay nonlinearity. In fact, recent studies in different areas discussed the presence of grazing bifurcations and the associated behavior changes. These abrupt transitions caused by grazing bifurcations are different from the well-known routes to chaos. In this work, a nonlinear analysis based on modern methods of nonlinear dynamics, such as power spectra and phase portraits is performed to characterize the sudden transitions in a three-degree of freedom aeroelastic system with freeplay nonlinearity in the flap degree of freedom. The results show that the main transition is due to a grazing bifurcation.en
dc.description.affiliationDepartment of Engineering Science and Mechanics, MC 0219, Virginia Tech, Blacksburg, Virginia 24061, USA.
dc.description.affiliationEngineering School of Sao Carlos, University of São Paulo, São Carlos, SP, Brazil.
dc.description.affiliationUnespSão Paulo State University (UNESP), São João da Boa Vista, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 303314/2010-9
dc.description.sponsorshipIdFAPESP: 2012/00325-4
dc.description.sponsorshipIdFAPESP: 2012/08459-1
dc.format.extent3161-3166
dc.identifierhttp://paginas.fe.up.pt/~eurodyn2014/CD/program.html
dc.identifier.citationEurodyn 2014: Ix International Conference On Structural Dynamics. Munich: European Assoc Structural Dynamics, p. 3161-3166, 2014.
dc.identifier.issn2311-9020
dc.identifier.lattes0347992247517442
dc.identifier.orcid0000-0001-7288-5408
dc.identifier.urihttp://hdl.handle.net/11449/130367
dc.identifier.wosWOS:000354786604026
dc.language.isoeng
dc.publisherEuropean Assoc Structural Dynamics
dc.relation.ispartofEurodyn 2014: Ix International Conference On Structural Dynamics
dc.relation.ispartofsjr0,165
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectAeroelasticityen
dc.subjectFreeplayen
dc.subjectGrazing bifurcationen
dc.subjectNonlinear dynamicsen
dc.subjectPiecewise-smooth systemsen
dc.titleCharacterization of grazing bifurcation in airfoils with control surface freeplay nonlinearityen
dc.typeTrabalho apresentado em evento
dcterms.rightsHolderEuropean Assoc Structural Dynamics
unesp.author.lattes0347992247517442[1]
unesp.author.orcid0000-0001-7288-5408[1]
unesp.author.orcid0000-0003-1451-3424[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, São João da Boa Vistapt

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