Abstract
The dynamic characteristics of two acoustic metamaterials were investigated using their representative mass-spring lattice models. Attention was focused on the band-gap behaviour of wave propagation in the two models. The study was carried out by performing finite element analyses. From the simulation results, it was found that both models have demonstrated the capability of filtering or blocking dynamic disturbances. However, in spite of having similar local resonance, the two models display different dynamic responses in the band gap. In addition, parametric studies of both metamaterials were carried out with the aim of providing a guide for the design of band gaps in acoustic metamaterials for desired functions.
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