Vibroacoustic design of metamaterial-type bio-inspired flapping wing

The structure of the insect wing consists of a random distribution in its geometry and material properties. This can be interesting in design of structures for dynamic applications. To make an accurate structural design of the insect wing, the real-life dimensions such as the thickness, material property variations, external loadings and the boundary conditions are considered. A low-frequency range of simulation up to 1275 Hz is considered. Then, a fully-coupled computational fluid dynamic model is developed for the transient structural analysis of the insect wing. The aerodynamic surface pressures on the insect wing are calculated. These have been used for the vibroacoustic analysis of the insect wing including of modal, frequency response and the acoustic analyses. This is later followed by a new approach that designing metamaterial type of wing which has honeycomb patterns and vibroacoustic performance of it is examined as well. The results of this study can be useful in the design of low noise lattice-type bioinspired structures for low frequency-range applications.