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Research of the Thin Biomimetic Cantilever Structure Properties

Author: HuangWenChao
Tutor: XuZhiHong
School: Nanjing University of Technology and Engineering
Course: Structural Engineering
Keywords: Dragonfly wings Bionic Reverse engineering Finite Element Analysis Ultra - thin cantilevered structures
CLC: TB17
Type: Master's thesis
Year: 2012
Downloads: 24
Quote: 0
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Abstract


Dragonfly wings is a perfect structure , it is light weight, large span , relative carrying capacity bionic structure best reference . This paper studies the the Dragonfly wings statics and dynamics , and on this basis , the proposed design of an ultra-thin cantilever bionic structure . This article reads as follows: (1) specifically designed to measure the modulus of elasticity of the the Dragonfly wings veins and wings film set of micro- force testing system , with the system . (2) the use of 3DSS series optical scanners scan dragonfly wings , to give the wings point cloud wings surfaces , after reverse engineering software Geomagic processing the point cloud , and then reconstruct Pro / E , dragonfly wings 3D model. Model into ANSYS to obtain three-dimensional finite element model , ( 3) beam element Beam189 simulation veins , shell element the Shell43 simulation winged membrane analysis using ANSYS research the Hymenoptera model , pulse membrane model and film pulseless model the three models , three models of stress , strain and deformation characteristics of the three models mechanical properties compare , summarize the advantages of the Dragonfly wings . ( 4 ) with the experimental method and finite element method analysis Dragonfly wings dynamics measured by Doppler vibrometer Dragonfly wings first three natural frequencies and mode shapes , and finite element calculations compare the two by natural frequencies are relatively close, the vibration modes are substantially the same , the first vibration mode is a vertical bending second order vibration mode is the bending and torsion about the vertical centerline , the third order vibration mode is around the vertical centerline of torsion . (5) Based on the above results , the proposed six ultra-thin cantilever the bionic structural model , mechanical analysis under concentrated force of these six models to compare the respective deformation , drawn from comparing the actual superior model .

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