人工晶体学报2024，Vol.53Issue(3)：511-518,8.
含螺旋孔的超材料夹层板的带隙特性研究
Bandgap Characteristics of Metamaterial Sandwich Plates with Spiral Holes
摘要
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.关键词
超材料夹层板/螺旋结构/能带结构/局域共振/低频宽带/振动控制Key words
metamaterial sandwich plate/spiral structure/band structure/local resonant/low frequency broadband/vibration control分类
通用工业技术引用本文复制引用
张玖林,田霞..含螺旋孔的超材料夹层板的带隙特性研究[J].人工晶体学报,2024,53(3):511-518,8.基金项目
国家自然科学基金(11972147,12372355) （11972147,12372355）
