Tumbling dynamics of passive flexible wings.
Tumbling dynamics of passive flexible wings.
复制标题
被动柔性机翼的翻滚动力学。
DOI：
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发表时间：
2010
影响因子：
8.6
通讯作者：
A. Kudrolli
中科院分区：
文献类型：
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作者：
D. Tam;J. M. Bush;M. Robitaille;A. Kudrolli
通过在空气中自由下落的矩形纸条翻滚实验，研究了柔性对自旋带翼种子荚飞行的影响。我们的结果表明，存在一个临界长度以上的机翼弯曲。我们建立了一个理论模型，证明这种屈曲是由与翻滚运动相关的惯性力引起的，并得出了与观察到的一致的屈曲准则。我们进一步开发了柔性翻滚翼飞行动力学的简化模型，该模型说明了气动弹性耦合对飞行特性的影响，并使实验观察到的机翼下降速度和范围的变化合理化。
The influence of flexibility on the flight of autorotating winged seedpods is examined through an experimental investigation of tumbling rectangular paper strips freely falling in air. Our results suggest the existence of a critical length above which the wing bends. We develop a theoretical model that demonstrates that this buckling is prompted by inertial forces associated with the tumbling motion, and yields a buckling criterion consistent with that observed. We further develop a reduced model for the flight dynamics of flexible tumbling wings that illustrates the effect of aeroelastic coupling on flight characteristics and rationalizes experimentally observed variations in the wing's falling speed and range.