Dynamical characterization of fully nonlinear, nonsmooth, stall fluttering airfoil systems

被引：5
作者：
dos Santos, L. G. P. [1 ]
Marques, F. D. [1 ]
Vasconcellos, R. M. G. [2 ]
机构：
[1] Univ Sao Carlos, Sao Carlos, Brazil
[2] Sao Paulo State Univ, Sao Joao Da Boa Vista, Brazil
来源：
NONLINEAR DYNAMICS | 2022年 / 107卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
Piecewise-smooth systems; Discontinuity-induced bifurcations; Chaos; Dynamic stall; HALE; LIMIT-CYCLE OSCILLATIONS; AEROELASTIC BEHAVIOR; FLIGHT DYNAMICS; SECTION; MODEL;
D O I：
10.1007/s11071-021-07097-5
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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.
引用
收藏
页码：2053 / 2074
页数：22
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