Nonlinear reduced-order modeling and bifurcation analysis of whirl flutter in a rotor-nacelle system

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorNew Mexico State University-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorQuintana, A.-
Autor(es): dc.creatorVasconcellos, R. [UNESP]-
Autor(es): dc.creatorThroneberry, G.-
Autor(es): dc.creatorAbdelkefi, A.-
Data de aceite: dc.date.accessioned2022-02-22T00:44:04Z-
Data de disponibilização: dc.date.available2022-02-22T00:44:04Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2019-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.2514/6.2020-3181-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/205336-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/205336-
Descrição: dc.descriptionWhirl flutter is an aeroelastic instability that can be affected by structural or/and aerodynamic nonlinearities. This instability may lead to potentially dangerous behaviors. In this study, a nonlinear reduced-order model for a nacelle-rotor system, considering quasi-steady aerodynamics is implemented. First, a parametric study for the linear system is performed to determine the main aerodynamic and structural characteristics that affect the onset of instability. Multiple polynomial nonlinearities in the two degrees-of-freedom nacelle-rotor model are tested to simulate possible structural nonlinear effects including symmetric cubic hardening nonlinearities for the pitch and yaw degrees of freedom, purely yaw nonlinearity, purely pitch nonlinearity, and a combination of quadratic and cubic nonlinearities for both degrees of freedom. Preliminary results show that the presence of hardening structural nonlinearities introduces limit cycle oscillations to the system in the post-flutter regime. Moreover, the inclusion of quadratic nonlinearity introduces asymmetric oscillations and subcritical Hopf bifurcation.-
Descrição: dc.descriptionDepartment of Mechanical and Aerospace Engineering New Mexico State University-
Descrição: dc.descriptionSao Paulo State University (UNESP)-
Descrição: dc.descriptionSao Paulo State University (UNESP)-
Formato: dc.format1-9-
Idioma: dc.languageen-
Relação: dc.relationAIAA AVIATION 2020 FORUM-
???dc.source???: dc.sourceScopus-
Título: dc.titleNonlinear reduced-order modeling and bifurcation analysis of whirl flutter in a rotor-nacelle system-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.