Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity

Detalhes bibliográficos
Autor(a) principal: Vasconcellos, R. [UNESP]
Data de Publicação: 2020
Outros Autores: Bouma, A., Marques, F., Abdelkefi, A., Hajj, M. R.
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.2514/6.2020-2665
http://hdl.handle.net/11449/205297
Resumo: The effects of freeplay, multi-segmented, and impact nonlinearities in the pitch and control surface degree of freedoms on the behavior of a three-degree of freedom aeroelastic system are investigated. The aeroelastic system consists of a plunging and pitching rigid airfoil supported by a linear spring in the plunge degree of freedom, a nonlinear torsional spring in the pitch degree of freedom and a control surface with a nonlinear spring in the trailing edge. The unsteady representation based on the Duhamel formulation is used to model the aerodynamic loads. Using modern methods of nonlinear dynamics, a nonlinear characterization is performed to identify the system’s response. Observations of this study show that grazing/sliding behavior are present as well as nonlinear coupling between the frequencies of the system, leading to a complex behavior, sudden transitions between harmonic and chaotic responses as freestream velocity is increased. These discontinuous characteristics can lead to the occurrence of sudden amplitude variations and broadband oscillatory behavior that can result in catastrophic structural failures in aeroelastic systems.
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spelling Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearityThe effects of freeplay, multi-segmented, and impact nonlinearities in the pitch and control surface degree of freedoms on the behavior of a three-degree of freedom aeroelastic system are investigated. The aeroelastic system consists of a plunging and pitching rigid airfoil supported by a linear spring in the plunge degree of freedom, a nonlinear torsional spring in the pitch degree of freedom and a control surface with a nonlinear spring in the trailing edge. The unsteady representation based on the Duhamel formulation is used to model the aerodynamic loads. Using modern methods of nonlinear dynamics, a nonlinear characterization is performed to identify the system’s response. Observations of this study show that grazing/sliding behavior are present as well as nonlinear coupling between the frequencies of the system, leading to a complex behavior, sudden transitions between harmonic and chaotic responses as freestream velocity is increased. These discontinuous characteristics can lead to the occurrence of sudden amplitude variations and broadband oscillatory behavior that can result in catastrophic structural failures in aeroelastic systems.São Paulo State University (UNESP)Department of Mechanical and Aerospace Engineering New Mexico State UniversityUniversity of São Paulo (USP)Department of Civil Environmental and Ocean Engineering Stevens Institute of TechnologySão Paulo State University (UNESP)Universidade Estadual Paulista (Unesp)New Mexico State UniversityUniversidade de São Paulo (USP)Stevens Institute of TechnologyVasconcellos, R. [UNESP]Bouma, A.Marques, F.Abdelkefi, A.Hajj, M. R.2021-06-25T10:13:02Z2021-06-25T10:13:02Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1-8http://dx.doi.org/10.2514/6.2020-2665AIAA AVIATION 2020 FORUM, p. 1-8.http://hdl.handle.net/11449/20529710.2514/6.2020-26652-s2.0-85092467955Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAIAA AVIATION 2020 FORUMinfo:eu-repo/semantics/openAccess2021-10-23T12:31:20Zoai:repositorio.unesp.br:11449/205297Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:19:11.638926Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
title Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
spellingShingle Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
Vasconcellos, R. [UNESP]
title_short Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
title_full Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
title_fullStr Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
title_full_unstemmed Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
title_sort Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
author Vasconcellos, R. [UNESP]
author_facet Vasconcellos, R. [UNESP]
Bouma, A.
Marques, F.
Abdelkefi, A.
Hajj, M. R.
author_role author
author2 Bouma, A.
Marques, F.
Abdelkefi, A.
Hajj, M. R.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
New Mexico State University
Universidade de São Paulo (USP)
Stevens Institute of Technology
dc.contributor.author.fl_str_mv Vasconcellos, R. [UNESP]
Bouma, A.
Marques, F.
Abdelkefi, A.
Hajj, M. R.
description The effects of freeplay, multi-segmented, and impact nonlinearities in the pitch and control surface degree of freedoms on the behavior of a three-degree of freedom aeroelastic system are investigated. The aeroelastic system consists of a plunging and pitching rigid airfoil supported by a linear spring in the plunge degree of freedom, a nonlinear torsional spring in the pitch degree of freedom and a control surface with a nonlinear spring in the trailing edge. The unsteady representation based on the Duhamel formulation is used to model the aerodynamic loads. Using modern methods of nonlinear dynamics, a nonlinear characterization is performed to identify the system’s response. Observations of this study show that grazing/sliding behavior are present as well as nonlinear coupling between the frequencies of the system, leading to a complex behavior, sudden transitions between harmonic and chaotic responses as freestream velocity is increased. These discontinuous characteristics can lead to the occurrence of sudden amplitude variations and broadband oscillatory behavior that can result in catastrophic structural failures in aeroelastic systems.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01
2021-06-25T10:13:02Z
2021-06-25T10:13:02Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://dx.doi.org/10.2514/6.2020-2665
AIAA AVIATION 2020 FORUM, p. 1-8.
http://hdl.handle.net/11449/205297
10.2514/6.2020-2665
2-s2.0-85092467955
url http://dx.doi.org/10.2514/6.2020-2665
http://hdl.handle.net/11449/205297
identifier_str_mv AIAA AVIATION 2020 FORUM, p. 1-8.
10.2514/6.2020-2665
2-s2.0-85092467955
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv AIAA AVIATION 2020 FORUM
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instname:Universidade Estadual Paulista (UNESP)
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