Targeted energy transfer to a rotary nonlinear energy sink
Targeted energy transfer to a rotary nonlinear energy sink
复制标题
将能量定向传输至旋转非线性能量吸收器
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
L. Bergman
中科院分区：
文献类型：
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作者：
Sean A. Hubbard;D. McFarland;A. Vakakis;L. Bergman
我们研究计算被动，非线性有针对性的能量转移引起的共振之间的相互作用的单自由度的非线性能量汇和一个灵活的，后掠飞机机翼的均匀板模型。我们表明，非线性能量汇可以被设计为快速，有效地吸收能量从一个或多个机翼模式在一个完全被动的方式。结果表明，使用这种装置来抑制或防止极限环振荡等气动弹性不稳定性是可行的。介绍了一种紧凑型非线性能量阱的设计，并对器件的参数进行了检验。使用耦合到控制能量汇的离散方程的机翼的有限元模型进行的模拟表明，目标能量传递是可实现的，例如，导致机翼的第二弯曲模式响应的快速且显著的减少。最后，有限元模型用于模拟增加的非线性能量汇刚度的影响，并显示非线性能量汇将与高频机翼模式共振相互作用的条件。Copyright © 2010 by ASME
We study computationally the passive, nonlinear targeted energy transfers induced by resonant interactions between a single-degree-of-freedom nonlinear energy sink and a uniform-plate model of a flexible, swept aircraft wing. We show that the nonlinear energy sink can be designed to quickly and efficiently absorb energy from one or more wing modes in a completely passive manner. Results indicate that it is feasible to use such a device to suppress or prevent aeroelastic instabilities like limit-cycle oscillations. The design of a compact nonlinear energy sink is introduced and the parameters of the device are examined. Simulations performed using a finite-element model of the wing coupled to discrete equations governing the energy sink indicate that targeted energy transfer is achievable, resulting, for example, in a rapid and significant reduction in the second bending mode response of the wing. Finally, the finite element model is used to simulate the effects of increased nonlinear energy sink stiffness, and to show the conditions under which the nonlinear energy sink will resonantly interact with higher-frequency wing modes.Copyright © 2010 by ASME