A contribution for nonlinear structural dynamics characterization of cantilever beams

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dc.contributor.authorBarros, Everaldo de
dc.contributor.authorMathias, Mauro Hugo [UNESP]
dc.contributor.institutionInstituto de Aeronáutica e Espaço (IAE)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:21:40Z
dc.date.available2014-05-27T11:21:40Z
dc.date.issued2005-12-01
dc.description.abstractSuccessful experiments in nonlinear vibrations have been carried out with cantilever beams under harmonic base excitation. A flexible slender cantilever has been chosen as a convenient structure to exhibit modal interactions, subharmonic, superharmonic and chaotic motions, and others interesting nonlinear phenomena. The tools employed to analyze the dynamics of the beam generally include frequency- and force-response curves. To produce force-response curves, one keeps the excitation frequency constant and slowly varies the excitation amplitude, on the other hand, to produce frequency-response curves, one keeps the excitation amplitude fixed and slowly varies the excitation frequency. However, keeping the excitation amplitude constant while varying the excitation frequency is a difficult task with an open-loop measurement system. In this paper, it is proposed a closed-loop monitor vibration system available with the electromagnetic shaker in order to keep the harmonic base excitation amplitude constant. This experimental setup constitutes a significant improvement to produce frequency-response curves and the advantages of this setup are evaluated in a case study. The beam is excited with a periodic base motion transverse to the axis of the beam near the third natural frequency. Modal interactions and two-period quasi-periodic motion are observed involving the first and the third modes. Frequency-response curves, phase space and Poincaré map are used to characterize the dynamics of the beam.en
dc.description.affiliationCentro Técnico Aeroespacial Instituto de Aeronáutica e Espaço Divisão de Integração e Ensaios, Praça Eduardo Gomes, 50, 12.228-904 São José dos Campos, SP
dc.description.affiliationUNESP - Universidade Estadual Paulista Faculdade de Engenharia Departamento de Mecânica, C.P. 205, 12.516-410 Guaratinguetá, SP
dc.description.affiliationUnespUNESP - Universidade Estadual Paulista Faculdade de Engenharia Departamento de Mecânica, C.P. 205, 12.516-410 Guaratinguetá, SP
dc.format.extent1950-1959
dc.identifierhttp://business.highbeam.com/437750/article-1G1-152997220/contribution-nonlinear-structural-dynamics-characterization
dc.identifier.citationInternational Congress on Noise Control Engineering 2005, INTERNOISE 2005, v. 3, p. 1950-1959.
dc.identifier.lattes9074899537066812
dc.identifier.scopus2-s2.0-84873860219
dc.identifier.urihttp://hdl.handle.net/11449/68501
dc.language.isoeng
dc.relation.ispartofInternational Congress on Noise Control Engineering 2005, INTERNOISE 2005
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBase excitation
dc.subjectBase motion
dc.subjectChaotic motions
dc.subjectClosed-loop
dc.subjectElectromagnetic shakers
dc.subjectExcitation amplitudes
dc.subjectExcitation frequency
dc.subjectFrequency-response curves
dc.subjectMeasurement system
dc.subjectModal interactions
dc.subjectNon-linear phenomena
dc.subjectNon-linear vibrations
dc.subjectNonlinear structural dynamics
dc.subjectPhase spaces
dc.subjectPoincare
dc.subjectQuasi-periodic motion
dc.subjectSubharmonics
dc.subjectSuper-harmonic
dc.subjectVibration systems
dc.subjectDynamics
dc.subjectPhase space methods
dc.subjectStructural dynamics
dc.subjectCantilever beams
dc.titleA contribution for nonlinear structural dynamics characterization of cantilever beamsen
dc.typeTrabalho apresentado em evento
unesp.author.lattes9074899537066812
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt
unesp.departmentEngenharia Mecânica - FEGpt

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Guaratinguetá - FEG - Faculdade de Engenharia e Ciências