Suppression of aeroelastic instability of 2-D wing by nonlinear energy sinks

被引：0
|
作者：
Zhang W. [1 ]
Zhang J. [1 ]
Cao S. [1 ]
机构：
[1] School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2016年 / 37卷 / 11期
关键词：
Nonlinear energy sink; Nonlinear vibration; Resonance capture; Targeted energy transfer; Vibration suppression;
D O I：
10.7527/S1000-6893.2016.0013
中图分类号：
学科分类号：
摘要：
The flow-induced vibration of two-dimensional wing coupled with two nonlinear energy sinks (NESs) under freestream flow is studied by numerical methods, and the relationship between the vibration suppression and targeted energy transfer (TET) of the system is analyzed. The model of the coupling system, which takes into account both heave and pitch motions, is developed, and the NESs are located at the leading edge and the trailing edge (NES1 and NES2) separately. The mechanisms of vibration suppression by NESs are also investigated from the viewpoint of energy transfer, etc., and the resonance captures in the nonlinear coupling system are studied using spectrum analysis. The ensuing TET through the modes of wing (Heave and Pitch) and the NESs are discussed, and the relationship between TET and different limit cycle oscillations of wing are investigated as well. The results show that the NESs can broaden the frequency domain in which the TET and resonance captures between modes can be more available in the coupling system. Therefore, the TET is more efficient between the wing and NESs, thus leading to the increase of the critical velocity of freestream under which the vibration of wing can be suppressed by NESs effectively. © 2016, Press of Chinese Journal of Aeronautics. All right reserved.
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页码：3249 / 3262
页数：13
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