Research on MRE control propagation of acoustic waves in phononic crystal

Abstract

In this article, acoustic waves in a phononic crystal which consists of MRE and PMMA periodic structure is studied. At the experimental stage, the bandgap of the phononic crystal designed by ourselves is recorded under different magnetic fields measured of Gauss meter. LMS is used to send, receive and process the experimental data. Finite element method is used to analyze the band gap of the acoustic waves in phononic crystal and the results are verified by experiments. The propagation of acoustic waves can be affected by the MRE whose storage modulus influenced by the magnetic field, which means, the band gap can be tuned by changing the magnetic field intensity.