Impacts of stall and structural nonlinearities on the stability of aeroelastic systems
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/205789 |
Resumo: | The effects of stall, quadratic, and cubic nonlinearities in the pitch degree of freedom on the behavior of a two-degree of freedom aeroelastic system are investigated. The nonlinear governing equations of the considered aeroelastic model are derived and discussed along with modeling of the aerodynamic loads based on two different approximations and results and conclusions are presented. Comparisons between quasi-steady and unsteady aerodynamic representations are investigated and discussed including stall effects. The unsteady representation based on the Sears and Pade approximations is used to model the aerodynamic loads. The nonlinear aeroelastic response is carried out in the presence of structural nonlinearities before and after the onset of flutter. The effects of the stall and unsteadiness of flow on the Hopf bifurcation are investigated along with a stability analysis of the two-degree of freedom system depending on the nonlinearities present and the stall effect. Results show that the choice of the aerodynamic representation can be critical on the prediction of the stability in the flutter boundary region and the pre-and post-flutter responses of the system. |
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Repositório Institucional da UNESP |
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spelling |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systemsThe effects of stall, quadratic, and cubic nonlinearities in the pitch degree of freedom on the behavior of a two-degree of freedom aeroelastic system are investigated. The nonlinear governing equations of the considered aeroelastic model are derived and discussed along with modeling of the aerodynamic loads based on two different approximations and results and conclusions are presented. Comparisons between quasi-steady and unsteady aerodynamic representations are investigated and discussed including stall effects. The unsteady representation based on the Sears and Pade approximations is used to model the aerodynamic loads. The nonlinear aeroelastic response is carried out in the presence of structural nonlinearities before and after the onset of flutter. The effects of the stall and unsteadiness of flow on the Hopf bifurcation are investigated along with a stability analysis of the two-degree of freedom system depending on the nonlinearities present and the stall effect. Results show that the choice of the aerodynamic representation can be critical on the prediction of the stability in the flutter boundary region and the pre-and post-flutter responses of the system.Department of Mechanical and Aerospace Engineering New Mexico State UniversitySão Paulo State University (UNESP)São Paulo State University (UNESP)New Mexico State UniversityUniversidade Estadual Paulista (Unesp)Bouma, A.Yossri, W.Vasconcellos, R. [UNESP]Abdelkefi, A.2021-06-25T10:21:19Z2021-06-25T10:21:19Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1-7AIAA Scitech 2021 Forum, p. 1-7.http://hdl.handle.net/11449/2057892-s2.0-85099912612Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAIAA Scitech 2021 Foruminfo:eu-repo/semantics/openAccess2021-10-22T17:27:31Zoai:repositorio.unesp.br:11449/205789Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:39:38.761317Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems |
title |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems |
spellingShingle |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems Bouma, A. |
title_short |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems |
title_full |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems |
title_fullStr |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems |
title_full_unstemmed |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems |
title_sort |
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems |
author |
Bouma, A. |
author_facet |
Bouma, A. Yossri, W. Vasconcellos, R. [UNESP] Abdelkefi, A. |
author_role |
author |
author2 |
Yossri, W. Vasconcellos, R. [UNESP] Abdelkefi, A. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
New Mexico State University Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Bouma, A. Yossri, W. Vasconcellos, R. [UNESP] Abdelkefi, A. |
description |
The effects of stall, quadratic, and cubic nonlinearities in the pitch degree of freedom on the behavior of a two-degree of freedom aeroelastic system are investigated. The nonlinear governing equations of the considered aeroelastic model are derived and discussed along with modeling of the aerodynamic loads based on two different approximations and results and conclusions are presented. Comparisons between quasi-steady and unsteady aerodynamic representations are investigated and discussed including stall effects. The unsteady representation based on the Sears and Pade approximations is used to model the aerodynamic loads. The nonlinear aeroelastic response is carried out in the presence of structural nonlinearities before and after the onset of flutter. The effects of the stall and unsteadiness of flow on the Hopf bifurcation are investigated along with a stability analysis of the two-degree of freedom system depending on the nonlinearities present and the stall effect. Results show that the choice of the aerodynamic representation can be critical on the prediction of the stability in the flutter boundary region and the pre-and post-flutter responses of the system. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:21:19Z 2021-06-25T10:21:19Z 2021-01-01 |
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 |
AIAA Scitech 2021 Forum, p. 1-7. http://hdl.handle.net/11449/205789 2-s2.0-85099912612 |
identifier_str_mv |
AIAA Scitech 2021 Forum, p. 1-7. 2-s2.0-85099912612 |
url |
http://hdl.handle.net/11449/205789 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
AIAA Scitech 2021 Forum |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-7 |
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_ |
1808129102983462912 |