A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/220726 |
Resumo: | This 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. |
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Repositório Institucional da UNESP |
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A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillatorCubic stiffnessDetached resonance curvesNonlinear oscillationsParameter estimationThis 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.Dipartimento di Ingegneria Meccanica Energetica e Gestionale Università della CalabriaDipartimento di Ingegneria Meccanica e Aerospaziale Politecnico di TorinoDepartamento de Engenharia Mecanica Universidade Estadual PaulistaDepartamento de Engenharia Mecanica Universidade Estadual PaulistaUniversità della CalabriaPolitecnico di TorinoUniversidade Estadual Paulista (UNESP)Gatti, GianlucaMarchesiello, StefanoBrennan, Michael J. [UNESP]2022-04-28T19:05:00Z2022-04-28T19:05:00Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1973-1979Proceedings of the International Conference on Structural Dynamic , EURODYN, v. 2014-January, p. 1973-1979.2311-9020http://hdl.handle.net/11449/2207262-s2.0-84994429933Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProceedings of the International Conference on Structural Dynamic , EURODYNinfo:eu-repo/semantics/openAccess2022-04-28T19:05:00Zoai:repositorio.unesp.br:11449/220726Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:29:24.485061Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator |
title |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator |
spellingShingle |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator Gatti, Gianluca Cubic stiffness Detached resonance curves Nonlinear oscillations Parameter estimation |
title_short |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator |
title_full |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator |
title_fullStr |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator |
title_full_unstemmed |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator |
title_sort |
A virtual experiment for the detection of specific features in the frequency response of a coupled nonlinear and linear oscillator |
author |
Gatti, Gianluca |
author_facet |
Gatti, Gianluca Marchesiello, Stefano Brennan, Michael J. [UNESP] |
author_role |
author |
author2 |
Marchesiello, Stefano Brennan, Michael J. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Università della Calabria Politecnico di Torino Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Gatti, Gianluca Marchesiello, Stefano Brennan, Michael J. [UNESP] |
dc.subject.por.fl_str_mv |
Cubic stiffness Detached resonance curves Nonlinear oscillations Parameter estimation |
topic |
Cubic stiffness Detached resonance curves Nonlinear oscillations Parameter estimation |
description |
This 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. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01 2022-04-28T19:05:00Z 2022-04-28T19:05:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Proceedings of the International Conference on Structural Dynamic , EURODYN, v. 2014-January, p. 1973-1979. 2311-9020 http://hdl.handle.net/11449/220726 2-s2.0-84994429933 |
identifier_str_mv |
Proceedings of the International Conference on Structural Dynamic , EURODYN, v. 2014-January, p. 1973-1979. 2311-9020 2-s2.0-84994429933 |
url |
http://hdl.handle.net/11449/220726 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Proceedings of the International Conference on Structural Dynamic , EURODYN |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1973-1979 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129525092974592 |