Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ijnonlinmec.2022.104100 http://hdl.handle.net/11449/240331 |
Resumo: | The effects of freeplay, multi-segmented, and impact nonlinearities in the pitch and control surface degrees of freedom on the nonlinear responses of a three-degree of freedom aeroelastic system are investigated to characterize the nonlinear behavior and possible bifurcations. The 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. Nonlinear characterization is performed to identify the system's response, under different representations of the nonlinear springs, below the linear flutter speed. The results show that grazing/sliding bifurcations are present and nonlinear coupling of the system's frequencies lead to complex responses including sudden transitions between harmonic and chaotic responses as the freestream velocity is increased. These responses, which include the sudden amplitude jumps, generation of higher harmonics and broadband oscillatory behavior, could result in catastrophic structural failures of aeroelastic systems even when operating below the linear flutter speed. |
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Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearitiesAeroelastic systemBifurcationsFreeplayImpactNonlinearThe effects of freeplay, multi-segmented, and impact nonlinearities in the pitch and control surface degrees of freedom on the nonlinear responses of a three-degree of freedom aeroelastic system are investigated to characterize the nonlinear behavior and possible bifurcations. The 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. Nonlinear characterization is performed to identify the system's response, under different representations of the nonlinear springs, below the linear flutter speed. The results show that grazing/sliding bifurcations are present and nonlinear coupling of the system's frequencies lead to complex responses including sudden transitions between harmonic and chaotic responses as the freestream velocity is increased. These responses, which include the sudden amplitude jumps, generation of higher harmonics and broadband oscillatory behavior, could result in catastrophic structural failures of aeroelastic systems even when operating below the linear flutter speed.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Department of Aeronautical Engineering São Paulo State University (Unesp) Campus of São João da Boa VistaDepartment of Mechanical and Aerospace Engineering New Mexico State University Las CrucesSão Carlos School of Engineering University of São Paulo (USP), SPDepartment of Civil Environmental and Ocean Engineering Stevens Institute of TechnologyDepartment of Aeronautical Engineering São Paulo State University (Unesp) Campus of São João da Boa VistaCNPq: 306824/2019-1CNPq: 311082/2016-5CAPES: 88881.302889/2018-01Universidade Estadual Paulista (UNESP)Las CrucesUniversidade de São Paulo (USP)Stevens Institute of TechnologyVasconcellos, R. [UNESP]Bouma, A.Marques, F.Abdelkefi, A.Hajj, M. R.2023-03-01T20:12:19Z2023-03-01T20:12:19Z2022-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.ijnonlinmec.2022.104100International Journal of Non-Linear Mechanics, v. 145.0020-7462http://hdl.handle.net/11449/24033110.1016/j.ijnonlinmec.2022.1041002-s2.0-85132734839Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal of Non-Linear Mechanicsinfo:eu-repo/semantics/openAccess2023-03-01T20:12:19Zoai:repositorio.unesp.br:11449/240331Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:16:33.572796Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities |
title |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities |
spellingShingle |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities Vasconcellos, R. [UNESP] Aeroelastic system Bifurcations Freeplay Impact Nonlinear |
title_short |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities |
title_full |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities |
title_fullStr |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities |
title_full_unstemmed |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities |
title_sort |
Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities |
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) Las Cruces 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. |
dc.subject.por.fl_str_mv |
Aeroelastic system Bifurcations Freeplay Impact Nonlinear |
topic |
Aeroelastic system Bifurcations Freeplay Impact Nonlinear |
description |
The effects of freeplay, multi-segmented, and impact nonlinearities in the pitch and control surface degrees of freedom on the nonlinear responses of a three-degree of freedom aeroelastic system are investigated to characterize the nonlinear behavior and possible bifurcations. The 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. Nonlinear characterization is performed to identify the system's response, under different representations of the nonlinear springs, below the linear flutter speed. The results show that grazing/sliding bifurcations are present and nonlinear coupling of the system's frequencies lead to complex responses including sudden transitions between harmonic and chaotic responses as the freestream velocity is increased. These responses, which include the sudden amplitude jumps, generation of higher harmonics and broadband oscillatory behavior, could result in catastrophic structural failures of aeroelastic systems even when operating below the linear flutter speed. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-10-01 2023-03-01T20:12:19Z 2023-03-01T20:12:19Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.ijnonlinmec.2022.104100 International Journal of Non-Linear Mechanics, v. 145. 0020-7462 http://hdl.handle.net/11449/240331 10.1016/j.ijnonlinmec.2022.104100 2-s2.0-85132734839 |
url |
http://dx.doi.org/10.1016/j.ijnonlinmec.2022.104100 http://hdl.handle.net/11449/240331 |
identifier_str_mv |
International Journal of Non-Linear Mechanics, v. 145. 0020-7462 10.1016/j.ijnonlinmec.2022.104100 2-s2.0-85132734839 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal of Non-Linear Mechanics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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_ |
1808129303884333056 |