Research On Band Gap Characteristics Of Pmma/Ai Criss-Crossed Elliptical Holes Phononic Crystal Plate

The band gap and transmission characteristics of the two-dimensional cross-arrangement elliptical aperture cycle structure were studied by finite element analysis. When the aluminum scatter is filled in the elliptical hole, the segmentation of the wide band gap can be realized to form a plurality of transmission channels. According to the theoretical model, the PMMA /A1 material phononic crystals model is implemented, and the results show that the aluminum scatterers can change the band gap distribution of the phononic crystals, realize the regulation of different frequency elastic waves in the periodic structure, which provides an idea for the design of acoustic device.