J4 ›› 2013, Vol. 10 ›› Issue (1): 28-38.doi: 10.1016/S1672-6529(13)60196-1

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Huaihui Ren, Xishu Wang, Xudong Li, Yinglong Chen   

  • 收稿日期:2012-08-20 修回日期:2012-10-20 出版日期:2013-01-10 发布日期:2013-01-10
  • 作者简介:Huaihui Ren, Xishu Wang, Xudong Li, Yinglong Chen

Effects of Dragonfly Wing Structure on the Dynamic Performances

Huaihui Ren, Xishu Wang, Xudong Li, Yinglong Chen   

  1. 1. Department of Engineering Mechanics, AML, Tsinghua University, Beijing 100084, P. R. China
    2. Longyuan (Beijing) Wind Power Engineer Technology Co. Ltd, Beijing 100034, P. R. China
    3. Qingdao Campus of Naval Aeronautical Academy, Qingdao 266041, P. R. China
  • Received:2012-08-20 Revised:2012-10-20 Online:2013-01-10 Published:2013-01-10
  • Contact: Xishu Wang E-mail:xshwang@tsinghua.edu.cn
  • About author:Huaihui Ren, Xishu Wang, Xudong Li, Yinglong Chen

Abstract:

The configurations of dragonfly wings, including the corrugations of the chordwise cross-section, the microstructure of the longitudinal veins and membrane, were comprehensively investigated using the Environmental Scanning Electron Microscopy (ESEM). Based on the experimental results reported previously, the multi-scale and multi-dimensional models with different structural features of dragonfly wing were created, and the biological dynamic behaviors of wing models were discussed through the Finite Element Method (FEM). The results demonstrate that the effects of different structural features on dynamic behaviors of dragonfly wing such as natural frequency/modal, bending/torsional deformation, reaction force/torque are very significant. The corrugations of dragonfly wing along the chordwise can observably improve the flapping frequency because of the greater structural stiffness of wings. In updated model, the novel sandwich microstructure of the longitudinal veins re-markably improves the torsional deformation of dragonfly wing while it has a little effect on the flapping frequency and bending deformation. These integrated structural features can adjust the deformation of wing oneself, therefore the flow field around the wings can be controlled adaptively. The fact is that the flights of dragonfly wing with sandwich microstructure of longitudinal veins are more efficient and intelligent.

Key words: self-adaptivity, biomechanics, dynamic behavior, micromechanics, multiscale