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首页> 外文期刊>Journal of Aircraft >Transonic Aeroelastic Instability Suppression for a Swept Wing by Targeted Energy Transfer
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Transonic Aeroelastic Instability Suppression for a Swept Wing by Targeted Energy Transfer

机译：通过有针对性的能量转移来扫掠机翼的跨音速气动弹性不稳定性抑制

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摘要

Targeted energy transfer is studied as a means for suppression of transonic aeroelastic instabilities of a wind-tunnel swept wing, with a focus on designing a lightweight nonlinear energy sink that improves the critical flutter condition. The aeroelastic response modes of the wing with a nonlinear energy sink coupled to the tip are identified and tested for robustness using a medium-fidelity computational aeroelasticity model, and confirm that robust suppression of transonic aeroelastic instabilities is achievable. Accordingly, a nonlinear energy sink is designed based on a parametric study, and its transonic aeroelastic effects are studied using medium- and high-fidelity models. The results of both models indicate an improvement in stability over a broad range of conditions; the high-fidelity model predicts an approximately 40% increase in the dynamic pressure at the critical stability condition. Finally, a prototype winglet-mounted nonlinear energy sink is modeled to examine its aeroelastic effects. The results show that the nonlinear-energy-sink design is robust, but the winglet design plays a critical role that must be considered in the overall effect.
机译：研究了有针对性的能量传递，作为抑制风洞扫掠机翼的跨音速气动弹性不稳定性的一种手段，重点是设计一种轻型的非线性能量吸收器，以改善临界颤振条件。使用中保真度计算气动弹性模型确定并测试了具有耦合到尖端的非线性能量汇的机翼的气动弹性响应模式，并测试了其鲁棒性，并确认可以实现对跨音速气动弹性不稳定性的鲁棒抑制。因此，基于参数研究设计了非线性能量吸收器，并使用中保真度模型和高保真度模型研究了其跨音速气弹效应。两种模型的结果都表明在各种条件下的稳定性都有所提高。高保真模型预测在临界稳定性条件下动压会增加约40％。最后，对原型的安装在小翼上的非线性能量沉进行建模，以检查其气动弹性效应。结果表明，非线性能量吸收器设计具有鲁棒性，但是小翼设计在整个效果中起着至关重要的作用。

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