Bandgap Characteristics of Metamaterial Sandwich Plates with Spiral Holes

Abstract

Abstract: In this paper, a new type of low frequency broadband perforated metamaterial sandwich plate is designed to suppress the transverse vibration between the plates. The unit cell of the structure is composed of the upper and the lower layer plates, spiral plates, cylindrical oscillators and support components. Among them, the spiral plate with four threaded holes is connected with the upper and lower plates through the support parts on both sides, and the oscillator is fixed at the center of the plate by bolts. The finite element analysis of the cell is carried out by COMSOL Multiphysics, and the energy band structure and resonance mode of the infinite periodic structure are obtained. In addition, the transmission transmittance of the finite-period structure is calculated. The results show that the structure generate two wide band gaps of low frequency vibration, and the vibration attenuation is obvious in the band gap range. Furthermore, this paper unveils the mechanism of the band gap, optimizes structural parameters, achieves low-frequency coupling of the two band gaps, and provides band gap configurations that meet the practical engineering requirements.

Key words: metamaterial sandwich plate, spiral structure, band structure, local resonant, low frequency broadband, vibration control

CLC Number:

TB535

ZHANG Jiulin, TIAN Xia. Bandgap Characteristics of Metamaterial Sandwich Plates with Spiral Holes[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(3): 511-518.

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