Modal and Harmonic Analysis of Bio-Mimic Corrugated Dragonfly Aerofoil

Abstract

In this present work, free vibration analysis is carried out on the 2-dimensional bio-mimetic corrugated ‘Pantala flavescens’ dragonfly forewing. The numerical modeling based on Finite Element Method (FEM) is developed to predict structural limitation of the dragonfly wings Dragonfly wings bend and twist over the course of flight stroke, causing deformation by a combination of elastic and inertial forces. We found that the wing deformation is smaller during the downstroke and it is revealed that the structural maximum beat frequency of a corrugated dragonfly wing is 38.34 Hz during hovering flight. The modal and harmonic analysis is performed using ANSYS 15 Mechanical APDL to extract the wing’s natural frequency and mode shape of corrugated wing which is significant in design, analysis and manufacturing of analogous MAVs structure.