Broad-Band Vibration Attenuation in Plates With Periodic Arrays of Shunted Piezoelectric Patches

Abstract

Periodic arrays of shunted piezoelectric patches are employed for the control of waves propagating over the surface of plate structures. The shunted piezoelectric patches act as sources of impedance mismatch, which yield interference phenomena resulting from the interaction between incident, reflected and transmitted waves produced by the mismatch. The impedance mismatch corresponding to the shunted piezos can be tuned to achieve strong attenuation over frequency bands which are defined by the shunting circuit connected to the patches. Broad-band vibration attenuation can be achieved through the application of series and parallel of multiple resonant circuits, or through the implementation of negative capacitance configurations. The ability of plates with periodic shunted piezoelectric patches to attenuate vibrations over extended frequency bands is demonstrated numerically, through Finite Element models of the considered electromechanical structures. The effect of number of patches and of their periodic distributions is investigated together with the analysis and the comparison of performance achieved with various shunting strategies.

A wavelet-based model of one-dimensional periodic structure for wave-propagation analysis

“…such structures are often encountered in engineering, for example, a periodically stiffened fuselage and wing of an aircraft, a periodic layered media, a bridge with repeated truss-like structures, a periodically supported pipe conveying fluid and a PS under random loading. In addition, their band-gap characteristics are used in applications such as vibration attenuation (Asiri & Baz 2006;Ruzzene & Airoldi 2008) and piezoelectric transducers (Ballandras et al 2003;Hofer et al 2006). Recently, with the advent of nano-structured materials, for example, carbon nanotubes and their composites, the study of their periodic properties will help in exploring their functional properties.…”