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首页> 外文期刊>The Journal of Experimental Biology >THE MOMENT OF INERTIA OF BIRD WINGS AND THE INERTIAL POWER REQUIREMENT FOR FLAPPING FLIGHT
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THE MOMENT OF INERTIA OF BIRD WINGS AND THE INERTIAL POWER REQUIREMENT FOR FLAPPING FLIGHT

机译：鸟翼惯性矩和襟翼飞行的惯性要求

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摘要

The agility and manoeuvrability of a flying animal and the inertial power required to flap the wings are related to the moment of inertia of the wings. The moments of inertia of the wings of 29 bird species and three bat species were determined using wing strip analysis. We also measured wing length, wing span, wing area, wing mass and body mass, A strong correlation (r(2)=0.997) was found between the moment of inertia and the product of wing mass and the square of wing length. Using this relationship, it was found that all birds that use their wings for underwater flight had a higher than average moment of inertia. Assuming sinusoidal wing movement, the inertial power requirement was found to be proportional to (body mass)(0.799), an exponent close to literature values for both metabolic power output and minimum power required for flight. Ignoring wing retraction, a fairly approximate estimate showed that the inertial power required is 11-15% of the minimum flight power. If the kinetic energy of the wings is partly converted into aerodynamic (useful) work at stroke reversal, the power loss due to inertial effects may be smaller. [References: 35]
机译：飞行动物的敏捷性和可操纵性以及拍打翅膀所需的惯性力与机翼的惯性矩有关。使用翼带分析法确定了29种鸟类和3种蝙蝠的翅膀的惯性矩。我们还测量了机翼长度，机翼跨度，机翼面积，机翼质量和机体质量，发现惯性矩与机翼质量乘积与机翼长度平方之间的相关性很强（r（2）= 0.997）。利用这种关系，发现所有使用翅膀进行水下飞行的鸟类的惯性矩均高于平均惯性矩。假设正弦曲线的机翼运动，则惯性功率要求与（体重）（0.799）成正比，这是一个与文献值相近的代谢功率输出和飞行所需最小功率的指数。忽略机翼缩回，相当近似的估计表明所需的惯性力为最小飞行力的11-15％。如果机翼的动能在行程反向时部分转换为空气动力（有用的功），则由于惯性效应而导致的动力损失可能会更小。 [参考：35]

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