航空科学技术2025，Vol.36Issue(3)：20-30,11.DOI:10.19452/j.issn1007-5453.2025.03.003
一种具有承载和抗冲击的手性超结构带隙特性与减振性能研究
Study on the Bandgap Characteristics and Vibration Reduction Performance of a Chiral Superstructure with Load and Impact Resistance
摘要
Abstract
Metamaterial structure has attracted wide attention due to its lightweight,weight bearing and vibration isolation,but the problem of narrow band gap range still exists.The chiral structure can reduce the symmetry of the system,enhance the anisotropy,and make the elastic wave band gap more easily to appear in the structure.In order to solve the impact and vibration problems in engineering,this paper proposes a negative Poisson's ratio chiral metamaterial structure with a low bandwidth gap,which is used to effectively attenuate low-frequency elastic waves,improve load-bearing and impact resistance capabilities.Based on Bloch's theorem,a theoretical model of band gap in metamaterial structures was established,and the mechanism of band gap generation was revealed through the analysis on vibration modes at the boundary of the band gap.The propagation characteristics of waves in structures were discussed using three-dimensional dispersion surfaces,frequency contour lines,phase velocities,and wave propagation directions.The mechanical properties and vibration transfer losses of chiral metamaterial structures were numerically calculated and compared with 3D printed chiral structure experiments.The results show that the structure has excellent load-bearing capacity and impact resistance,and can generate multiple low-frequency bandgaps.The transmission loss within the bandgap range can reach-85dB,which provides a new solution for suppressing low broadband vibrations in engineering.关键词
超材料/手性结构/带隙特性/隔振Key words
metamaterials/chiral structure/band gap characteristics/vibration isolation引用本文复制引用
林华刚,张成旭,宋海征,王攀,王建强..一种具有承载和抗冲击的手性超结构带隙特性与减振性能研究[J].航空科学技术,2025,36(3):20-30,11.基金项目
航空科学基金(20220015053005) （20220015053005）
中央高校基本科研业务费专项资金(5000240291) （5000240291）
广东省自然科学基金(2022A1515110177,2024A1515011978) Aeronautical Science Foundation of China(20220015053005) （2022A1515110177,2024A1515011978）
Fundamental Research Funds for the Central Universities(5000240291) （5000240291）
Guangdong Provincial Natural Science Foundation(2022A1515110177,2024A515011978) （2022A1515110177,2024A515011978）
