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翼
空气动力学
计算流体力学
Lift(数据挖掘)
弯曲
结构工程
空气动力
抗弯刚度
流固耦合
刚度
昆虫飞行
有限元法
计算机科学
工程类
航空航天工程
数据挖掘
作者
Feng Liu Yang,Long Chen,Yan Qing Wang
出处
期刊:AIAA Journal
[American Institute of Aeronautics and Astronautics]
日期:2022-08-29
卷期号:60 (12): 6680-6691
被引量:2
摘要
Insect wings and biomimetic wings in flapping-wing micro air vehicles (FWMAVs) are flexible and subject to passive deformations, including spanwise twisting and bending. This raises a typical bilateral fluid–structure interaction (FSI) issue, which is conventionally solved based on combined computational fluid dynamics (CFD) and computational solid dynamics (CSD) methods. To reduce the computational cost of this FSI issue while maintaining a reasonable accuracy, a theoretical model with improved adaptability is proposed here. The improvement results from the consideration of spanwise bending: the distribution of which is formulated by a quadratic polynomial. The aerodynamic force is approximated by a predictive quasi-steady aerodynamic model based on the blade element theory. The FSI iteration at a time step is converged within 0.5 s in our model, whereas a traditional CFD–CSD solution takes about 30 s. Compared to our previous model, the current model can better match the experimental measurements of insect wings. Further analysis reveals that considering spanwise bending affects the stiffness design of flexible flapping wings quantitatively. To maintain a high lift efficiency, the structural stiffness of the wing should be appropriately decreased. Our model provides a refined tool for the wing design in FWMAVs and can promote the development of FWMAVs.
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