Study on bandgap vibration isolation of super-cell phononic crystals based on magnetorheological elastomers

Guo-Jun Yu,Shao-Jie Zhu,Ling-Yun Wang,Cheng-Bin Du,Xi-Xi Wen

doi:10.1063/5.0065140

Abstract

A two-dimensional super-cell phononic crystal semi-active isolator based on magnetorheological elastomers is designed, which can be used for vibration isolation of mechanical devices at medium and high frequencies. The plane wave expansion method of the super-cell is introduced to model the dynamic characteristics of the proposed phononic crystal isolator. The influence of the constituent materials, dimension parameter of the super-cell, and magnetic field intensity on the band structure is investigated by the plane wave expansion method. The results show that the change of material will affect the bandgap frequency of the super-cell and the dimension parameter of the super-cell will affect the bandgap formation mechanism. It is worth pointing out that the bandgap frequency and width of the isolator can be adjusted by controlling the applied current of the magnetorheological elastomer. Therefore, this method offers a broad range of possibilities for phononic crystal vibration isolation design.

Highlights

Vibration caused by high-speed large-scale mechanical equipment will bring adverse effects on people’s health physically and mentally
The authors of Ref. 7 designed a new type of magnetorheological elastomers (MREs) isolator, and the results of numerical analysis showed that MRE isolators have content adjustable behavior
The results show that the bandgap of the phononic crystals fabricated by the anisotropic MRE has a wider range of control

Summary

Introduction

Vibration caused by high-speed large-scale mechanical equipment will bring adverse effects on people’s health physically and mentally. The authors of Ref. 19 designed a one-dimensional phononic crystal isolator with an MRE, steel, and lead laminates and studied its elastic wave bandgap. A two-dimensional super-cell phononic crystal isolator based on the MRE is designed, which has the advantages of controllable mechanical properties and adjustable bandgap.

Results

Conclusion