Smart metamaterials for noise and vibration control

This paper presents a simulation study on the feasibility of smart metamaterial panel equipped with shunted piezoelectric patch vibration absorbers, which is designed to reduce the flexural vibration and sound radiation in the low to mid audio frequency range. The panel is exposed to a rain on the roof time and spatial stochastic excitation. The overall flexural response of the panel is derived in terms of the spectrum of the time averaged total flexural kinetic energy. The panel is equipped with a dense two dimensional array of piezoelectric patch vibration absorbers, which are connected to either passive or active electrical shunts. A vibration stop band effect is obtained both via the spatial organization of the absorbers and via the resonating shunts connected to the piezoelectric patches, which are set to minimize the flexural response of the panel at low and mid audio frequencies.