A high-quality narrow passband filter for elastic SV waves via aligned parallel separated thin polymethylmethacrylate plates

Jun Zhang,Ning Hu,Yaolu Liu,Wensheng Yan

doi:10.1063/1.4994597

Abstract

We designed a high-quality filter that consists of aligned parallel polymethylmethacrylate (PMMA) thin plates with small gaps for elastic SV waves propagate in metals. Both the theoretical model and the full numerical simulation show the transmission spectrum of the elastic SV waves through such a filter has several sharp peaks with flawless transmission within the investigated frequencies. These peaks can be readily tuned by manipulating the geometry parameters of the PMMA plates. Our investigation finds that the same filter performs well for different metals where the elastic SV waves propagated.

Highlights

A high-quality narrow passband filter for elastic SV waves via aligned parallel separated thin polymethylmethacrylate plates
Since the existence of the forbidden band gaps in phononic crystals[1,2] (PnCs), these metamaterials have been thought to be a promising material within the design of isolators and filters[3,4,5,6] for acoustic and elastic waves
Besides the prevailing PnCs in the forms of 1D layered structures and 2D composite materials, there has been attention paid to the PnCs based on basic mechanical components including beams,[14,15,16] thin plates,[17,18,19,20,21] and membranes.[22,23]

Summary

Introduction

A high-quality narrow passband filter for elastic SV waves via aligned parallel separated thin polymethylmethacrylate plates. Since the existence of the forbidden band gaps in phononic crystals[1,2] (PnCs), these metamaterials have been thought to be a promising material within the design of isolators and filters[3,4,5,6] for acoustic and elastic waves. The PnCs acting as filters for elastic waves with a narrow passband[3,24] are not largely studied, the ones based on the basic mechanical elements without complicated material modulation.[24]

Results

Conclusion