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구남서(Nam Seo Goo),하넉산(Ngoc San Ha),김태렬(Tailie Jin) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In this study, the dynamic characteristic of an artificial wing mimicking an Allomyrina Dichotoma beetle’s hind wing was investigated using a non-contact measurement method. The natural frequency, mode shape, and damping ratio of first two basic vibration modes in the operating frequency range were determined using a Bruel & Kjaer (B&K) fast Fourier transform analyzer along with a laser sensor. To confirm the results, a three-dimensional digital image correlation (3D-DIC) method along with high speed digital cameras was employed to construct the mode shapes of the wing when it was vibrated at pre-determined natural frequency. The mode shapes by DIC method showed a good agreement with those by laser displacement sensor. These results provide a method to investigate the modal analysis of a light weight structure like insect wing as well as construct the mode shape using DIC.