Rainbow Smart Metamaterial to Improve Flexural Wave Isolation and Vibration Attenuation of a Beam

EasyChair Preprint 8100

Abstract

This article analyzes wave propagation isolation and vibration attenuation strategies of a beam coupled to piezoelectric sensors periodically arranged in a given frequency band. Each piezo sensor is connected to a resonant shunt circuit. The influence on the attenuation band is due to a tunable shunt impedance associated with the corresponding piezo. Hence, the piezo's resonate at different and neighbouring frequencies creates a tunable rainbow trap that can attenuate the energy within a bandgap characteristic. The smart metastructure is modelled by means of the spectral element method, which is a highly accurate method with a low computational cost. Flexural wave propagation is obtained using the Transfer Matrix Method with the scatter diagram plot. Results show the effect of broadband vibrations' attenuation and propagating waves isolation. Moreover, the spectral range over which attenuation is achieved with the rainbow arrangements is on average wider than the usual metamaterials configurations.

Keyphrases: Rainbow metamaterial, Smart metastructure, Spectral element method, Transfer matrix method

@booklet{EasyChair:8100,
  author    = {Braion B. Moura and Marcela R. Machado},
  title     = {Rainbow Smart Metamaterial to Improve Flexural Wave Isolation and Vibration Attenuation of a Beam},
  howpublished = {EasyChair Preprint 8100},
  year      = {EasyChair, 2022}}