Dynamic Behavior of Dragonfly Wings
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This paper describes the frequency characteristics of dragonfly wings related to the aerodynamic characteristics. In the first stage, the higher speed flight of a dragonfly was analyzed with a high-speed video camera system. It was confirmed that insect wings undergo strong deformation during free flight. In the second stage, the surface roughness of dragonfly wing was measured by the three-dimensional, optical shape measuring system. It was clear that the difference of elevation is especially remarkable between the longitudinal veins at the part of leading edge. In the third stage, the dynamic responses of dragonfly wing to the excitation vibration were examined over the relatively wide range of frequency. The maximum amplitudes of insect wing oscillation were measured with the optical displacement detector system. It was found that the natural frequencies of dragonfly wings were related to the flapping frequency of the dragonfly. The deformable characteristics of dragonfly wings were related to the aerodynamic characteristics and structural strength of the dragonfly wing. Flexibility on the trailing edge of dragonfly wings was revealed experimentally.
- Proceedings of the Japan Society for Photoelasticity
Proceedings of the Japan Society for Photoelasticity 8, 163-168, 2008-06-25
The Japanese Society for Experimental Mechanics