Dynamical characterization of fully nonlinear, nonsmooth, stall fluttering airfoil systems
Nenhuma Miniatura disponível
Data
2022-02-01
Autores
dos Santos, L. G.P.
Marques, F. D.
Vasconcellos, R. M.G. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Stall flutter is turning into a more likely condition to be encountered as the demand for increasingly more flexible wings grows for HALE-like aircraft. Due to the various nonlinearities involved that can lead to complex motion, the characterization of the dynamical behavior in the post-flutter condition becomes important. The dynamics of a pitch–plunge idealized HALE typical section with aerodynamic, structural and kinematic nonlinearities in the stall flutter regime was investigated using an aeroelastic state-space formulation which includes a modified Beddoes-Leishman dynamic stall model. The results reveal that period-doubling was possible without stall, but chaos arose at discontinuity-induced bifurcations due to dynamic stall. A parametric study has been conducted to assess the influence of key parameters in the development of bifurcations and chaos.
Descrição
Palavras-chave
Chaos, Discontinuity-induced bifurcations, Dynamic stall, HALE, Piecewise-smooth systems
Como citar
Nonlinear Dynamics, v. 107, n. 3, p. 2053-2074, 2022.