航空科学技术2024，Vol.35Issue(8)：36-55,20.DOI:10.19452/j.issn1007-5453.2024.08.005
新型单相超材料的低频带隙和振动特性研究
Study of Low-frequency Band Gaps and Vibrational Properties in Novel Monophasic Metamaterials
摘要
Abstract
Low frequency vibration and noise suppression has always been a problem that needs to be overcome.Therefore,a novel single-phase metamaterial structure is proposed in this paper.Based on Bloch's theorem and finite element method,the bandgap characteristics and formation mechanism of the proposed structure are numerically analyzed,and the dependence of the bandgap on geometric size is parameterized.The propagation characteristics of waves in the structure are explored using three-dimensional dispersion surfaces,frequency contours,phase velocity,and group velocity,Moreover,the attenuation of elastic waves in finite size lattices was analyzed,verifying the effective suppression effect on band gaps on elastic waves.The results indicate that the proposed structure has excellent bandgap characteristics,and the bandgap is sensitive to geometric dimensions,which can achieve tunable bandgap.The proposed structure can effectively suppress elastic waves within a frequency range of 1000Hz.It provides important clues and ideological guidance for the design of devices with low-frequency vibration isolation performance.关键词
低频带隙/波传播/振动抑制/群速度/相速度Key words
low frequency bandgap/wave propagation/vibration suppression/group velocity/phase velocity分类
航空航天引用本文复制引用
杨红云,张昭展,王硕,延浩,丁千,董兴建,孙永涛,燕群..新型单相超材料的低频带隙和振动特性研究[J].航空科学技术,2024,35(8):36-55,20.基金项目
航空科学基金(201915048001) Aeronautical Science Foundation of China(201915048001) （201915048001）
