Aeroelastic suppression of an airfoil with control surface using nonlinear energy sink

被引：37
|
作者：
Guo, Hulun [1 ,2 ]
Cao, Shuqian [1 ,2 ]
Yang, Tianzhi [1 ,2 ]
Chen, Yushu [1 ,2 ]
机构：
[1] Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China
[2] Tianjin Key Lab Nonlinear Dynam & Control, Tianjin 300072, Peoples R China
来源：
NONLINEAR DYNAMICS | 2018年 / 94卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Airfoil; Control surface; Freeplay; Nonlinear energy sink; Aeroelastic suppression; LIMIT-CYCLE OSCILLATIONS; PRECISE INTEGRATION METHOD; FREEPLAY NONLINEARITY; FREE-PLAY; 2-DEGREE-OF-FREEDOM AIRFOIL; STRUCTURAL NONLINEARITIES; PART; SYSTEM; FLUTTER; INSTABILITY;
D O I：
10.1007/s11071-018-4398-4
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Aeroelasticity exists in airfoil with control surface freeplay, which may induce instability in an incompressible flow. In this paper, a nonlinear energy sink (NES) is used to suppress the aeroelasticity of an airfoil with a control surface. The freeplay and cubic nonlinearity in pitch are taken into account. The harmonic balance method is used to analytically determine the limit cycle oscillations (LCOs) amplitudes of the airfoil-NES system. Linear and nonlinear flutter speeds are detected from the airfoil with control surface freeplay. When NES is attached, both the linear flutter speed of airfoil without freeplay and the nonlinear flutter speed of airfoil with a freeplay are increased. Moreover, the LCO amplitude of airfoil is decreased due to NES. Then, the influences of NES parameters on the increase in flutter boundary of airfoil are carefully studied.
引用
收藏
页码：857 / 872
页数：16
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