Aeroelastic analysis and characterization of three-degree-of-freedom systems with discontinuous nonlinearity
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
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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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 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
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 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-8 |
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 |
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1808129308685762560 |