A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorGatti, Gianluca
dc.creatorMarchesiello, Stefano
dc.creatorBrennan, Michael J.
dc.creatorCunha, A.
dc.creatorCaetano, E.
dc.creatorRibeiro, P.
dc.creatorMuller, G.
dc.date2015-11-03T15:30:21Z
dc.date2016-10-25T21:18:44Z
dc.date2015-11-03T15:30:21Z
dc.date2016-10-25T21:18:44Z
dc.date2014-01-01
dc.date.accessioned2017-04-06T09:18:51Z
dc.date.available2017-04-06T09:18:51Z
dc.identifierEurodyn 2014: Ix International Conference On Structural Dynamics. Munich: European Assoc Structural Dynamics, p. 1973-1979, 2014.
dc.identifier2311-9020
dc.identifierhttp://hdl.handle.net/11449/130219
dc.identifierhttp://acervodigital.unesp.br/handle/11449/130219
dc.identifierWOS:000354786602079
dc.identifierhttp://porto.polito.it/view/keywords/nonlinear_oscillations.html
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/940766
dc.descriptionThis paper presents an investigation into some practical issues that may be present in a real experiment, when trying to validate the theoretical frequency response curve of a two degree-of-freedom nonlinear system consisting of coupled linear and nonlinear oscillators. Some specific features, such as detached resonance curves, have been theoretically predicted in multi degree-of-freedom nonlinear oscillators, when subject to harmonic excitation, and the system parameters have been shown to be fundamental in achieving such features. When based on a simplified model, approximate analytical expression for the frequency response curves may be derived, which may be validated by the numerical solutions. In a real experiment, however, the practical achievability of such features was previously shown to be greatly affected by small disturbances induced by gravity and inertia, which led to some solutions becoming unstable which had been predicted to be stable. In this work a practical system configuration is proposed where such effects are reduced so that the previous limitations are overcome. A virtual experiment is carried out where a detailed multi-body model of the oscillator is assembled and the effects on the system response are investigated.
dc.languageeng
dc.publisherEuropean Assoc Structural Dynamics
dc.relationEurodyn 2014: Ix International Conference On Structural Dynamics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectNonlinear oscillations
dc.subjectDetached resonance curves
dc.subjectCubic stiffness
dc.subjectParameter estimation
dc.titleA virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator
dc.typeOtro


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