蜻蜓翅静脉血液对其振动特性的影响。

Effects of blood in veins of dragonfly wing on the vibration characteristics.

机构信息

School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, P. R. China.

Department of Engineering Mechanics, School of Aerospace, Tsinghua University, Beijing 100084, P. R. China.

出版信息

Comput Biol Med. 2015 Mar;58:14-9. doi: 10.1016/j.compbiomed.2014.12.018. Epub 2014 Dec 31.

DOI:10.1016/j.compbiomed.2014.12.018

PMID:25577611

Abstract

How the blood in veins of dragonfly wing affects its vibration characteristics is investigated. Based on the experimental results of the wing's morphology and microstructures, including the veins, the membranes and the pterostigma, accurate three-dimensional finite element models of the dragonfly forewing are developed. Considering the blood in veins, the total mass, mass distribution and the moments of inertia of the wing are studied. The natural frequencies/modal shapes are analyzed when the veins are filled with and without blood, respectively. The based natural frequency of the model with blood (189 Hz) is much closer to the experimental result. Relative to bending modal shapes, the torsional ones are affected more significantly by the blood. The results in this article reveal the multi-functions of the blood in dragonfly wings and have important implications for the bionic design of flapping-wing micro air vehicles.

摘要

研究了蜻蜓翅膀静脉中的血液如何影响其振动特性。基于翅膀的形态和微观结构的实验结果，包括静脉、膜和翅痣，开发了蜻蜓前翅的精确三维有限元模型。考虑到静脉中的血液，研究了翅膀的总质量、质量分布和转动惯量。分析了静脉中充满和不充满血液时的固有频率/模态形状。带血模型的基本固有频率（189Hz）更接近实验结果。相对于弯曲模态形状，扭转模态形状受血液的影响更为显著。本文的结果揭示了蜻蜓翅膀中血液的多功能性，对扑翼微型飞行器的仿生设计具有重要意义。