title: Effects of blood in veins of dragonfly wing on the vibration characteristics.
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.
authors.affiliation: School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, P. R. China. Electronic address: houdan65@126.com.
authors.forename: Dan
authors.initials: D
authors.lastname: Hou
authors.affiliation: Department of Engineering Mechanics, School of Aerospace, Tsinghua University, Beijing 100084, P. R. China. Electronic address: yinyj@tsinghua.edu.cn.
authors.forename: Yajun
authors.initials: Y
authors.lastname: Yin
authors.affiliation: School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, P. R. China. Electronic address: zhx@tongji.edu.cn.
authors.forename: Hongxiao
authors.initials: H
authors.lastname: Zhao
authors.affiliation: School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, P. R. China. Electronic address: zhongk@tongji.edu.cn.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhong
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D001808:Blood Vessels / Q000033:anatomy & histology / Q000502:physiology; D020342:Finite Element Analysis; D008954:Models, Biological; D063191:Odonata / Q000502:physiology*; D014732:Vibration; D014921:Wings, Animal / Q000033:anatomy & histology* / Q000098:blood supply* / Q000502:physiology
keywords: Blood circulation; Dragonfly wing; Finite element method; Mode shape; Multi-functional bionics; Natural frequency; Vein