Airfoil control surface discontinuous nonlinearity experimental assessment and numerical model validation

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorVasconcellos, Rui M.G.-
Autor(es): dc.creatorAbdelkefi, Abdessattar-
Autor(es): dc.creatorHajj, Muhammad R.-
Autor(es): dc.creatorAlmeida, Daniel P.-
Autor(es): dc.creatorMarques, Flávio D.-
Data de aceite: dc.date.accessioned2021-03-11T00:29:19Z-
Data de disponibilização: dc.date.available2021-03-11T00:29:19Z-
Data de envio: dc.date.issued2018-12-11-
Data de envio: dc.date.issued2018-12-11-
Data de envio: dc.date.issued2016-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1177/1077546314543911-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/168444-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/168444-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionA variety of dynamic behaviors that may be encountered in aeroelastic systems with discontinuous nonlinearities has motivated investigations that may support future applications in flight controls design, flutter prediction, instability characterization and energy harvesting. In this paper, the case of an airfoil with control surface freeplay is assessed experimentally and modeled numerically using an alternative continuous approximation for the discontinuous nonlinearity based on hyperbolic tangent function representation. The unsteady aerodynamic loads are computed using the modified unsteady Theodorsen approximation for arbitrary motions. The validity of the proposed freeplay representation is performed through comparison with experimental data. Adjustments to the pitching restoring moments have been carried out to account for a smooth polynomial concentrated nonlinearity. Data analysis is performed to characterize and investigate the experimental signals. Sub-critical bifurcation behavior is observed from both experimental data and the numerical model prediction. The results confirm the validity of hyperbolic tangent function combinations for freeplay nonlinearity representation for the experimental setup conditions.-
Formato: dc.format1633-1644-
Idioma: dc.languageen-
Relação: dc.relationJVC/Journal of Vibration and Control-
Relação: dc.relation0,763-
Direitos: dc.rightsopenAccess-
Palavras-chave: dc.subjectbifurcation-
Palavras-chave: dc.subjectExperimental aeroelasticity-
Palavras-chave: dc.subjectfreeplay-
Palavras-chave: dc.subjectnonlinear dynamics-
Palavras-chave: dc.subjecttime series analysis-
Título: dc.titleAirfoil control surface discontinuous nonlinearity experimental assessment and numerical model validation-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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