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arXiv 1504.06644physics.flu-dyn
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昆虫翅膀的周期性和混沌拍动

Periodic and Chaotic Flapping of Insectile Wings

Yangyang Huang, Eva Kanso

摘要:

昆虫利用附着在翅膀底部的飞行肌肉产生令人印象深刻的翅膀拍打频率。这些飞行肌肉的最大功率输出不足以维持这样的翅膀振荡,除非在昆虫飞行系统中有良好的弹性能量储存。在这里,我们探讨了昆虫翅膀模型的内在自振荡行为,由两个刚性翅膀连接在其基础上的弹性扭转弹簧。我们研究了作为总能量和弹簧刚度的函数的机翼行为。三种类型的行为被确定为:端对端旋转,混沌运动,和周期性的拍打。有趣的是,周期性挥舞的区域随着能量的增加而减小,但是随着刚度的增加而有利。这些发现与昆虫翅膀和飞行肌肉是僵硬的这一事实相一致。他们进一步暗示,通过将它们的肌肉硬度调整到所需的能级,昆虫可以在一系列操作条件下机械地保持周期性扑翼。

英文摘要:

Insects use flight muscles attached at the base of the wings to produce impressive wing flapping frequencies. The maximum power output of these flight muscles is insufficient to maintain such wing oscillations unless there is good elastic storage of energy in the insect flight system. Here, we explore the intrinsic self-oscillatory behavior of an insectile wing model, consisting of two rigid wings connected at their base by an elastic torsional spring. We study the wings behavior as a function of the total energy and spring stiffness. Three types of behavior are identified: end-over-end rotation, chaotic motion, and periodic flapping. Interestingly, the region of periodic flapping decreases as energy increases but is favored as stiffness increases. These findings are consistent with the fact that insect wings and flight muscles are stiff. They further imply that, by adjusting their muscle stiffness to the desired energy level, insects can maintain periodic flapping mechanically for a range of operating conditions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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