In this paper, a membrane-type metamaterial sandwich plate structure is proposed by combining the membrane-type acoustic metamaterial structure with the grid sandwich plate structure. The structural model of the membrane metamaterial sandwich plate is established by the finite element method, and the mechanism of band gap generation is analyzed. Based on the single-layer membrane-type metamaterial sandwich plate structure, double membrane-type acoustic metamaterials sandwich plate structures with the same masses and different masses are proposed, and the local resonance band gap generated by them is compared with the single-layer membrane-type metamaterial sandwich plate structure. The results show that the double membrane-type acoustic metamaterials sandwich plate structure with the same masses can effectively broaden the band gap range and the double membrane-type acoustic metamaterials sandwich plate structure with the different masses can effectively increase the number of band gaps. In addition, if the mass adhesion position of the ' film-mass ' resonators with the same masses and different masses is changed respectively, the asymmetry of the structure will cause the double membrane-type acoustic metamaterials plate to produce multiple resonant band gaps, and the bandwidth generated by the resonator with the same masses does not overlap but the adjacent band gaps will be combined into a larger band gap, while the band gap width of other band gaps will be reduced.
刘金辉,李金强,张垚,宋智广.双层薄膜型超材料夹层板的多带隙设计[J].动力学与控制学报,2023,21(7):20~27; . Multi-Bandgap Design of Double Membrane-Type Acoustic Metamaterials[J]. Journal of Dynamics and Control,2023,21(7):20-27.