超材料屏障的低频减振性能研究
PDF下载 (83)马梦蕾,袁丽莉.超材料屏障的低频减振性能研究[J].宁波大学学报(理工版),2026,39(2):18-27.DOI:10.20098/j.cnki.1001-5132.2025.0801
MA Menglei,YUAN Lili.Research on low-frequency vibration reduction performance of metamaterial barriers[J].Journal of Ningbo University(Natural Science & Engineering Edition),2026,39(2):18-27.DOI:10.20098/j.cnki.1001-5132.2025.0801
| Title: | Research on low-frequency vibration reduction performance of metamaterial barriers |
| 作者: | 马梦蕾, 袁丽莉 |
| Author(s): | MA Menglei, YUAN Lili |
| 关键词: | 声学超材料; 局域共振; 低频带隙; 表面波 |
| Keywords: | acoustic metamaterials; local resonance; low-frequency bandgap; surfacewaves |
| 分类号: | TU352.1+2 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.0801 |
| 文献标识码: | A |
| 摘要: | 针对城市轨道交通引发的低频振动问题，提出一种浅埋式小尺寸声学超材料屏障用于抑制表面波传播。首先，基于有限元法（Finite Element Method，FEM）计算该结构的频散特性，并结合模态分析阐明其对表面波的调控机理。其次，进一步定量探究超材料结构的晶格常数、内层振子半径、外约束层厚度等几何因素和材料因素对表面波带隙的调控规律，同时通过正交实验探讨各因素对带隙宽度和频率的影响程度。最后，通过有限周期的频域分析进一步验证该结构在轨道隔振中的实际减振性能。结果表明：该超材料屏障对Rayleigh波的完全带隙范围为34.1~48.3Hz，对Love波的完全带隙范围为20.8~62.3Hz。研究结果为超材料屏障的实际应用提供了理论基础，同时也展示了其在表面波衰减领域的工程应用潜力。 |
| Abstract: | To mitigate the low-frequency vibration caused by urban rail transit, this study proposes a shallow-buried compact acoustic metamaterial barrier to suppress the propagation of surface wave. The dispersion characteristics of the structure were calculated based on the finite element method (FEM), and the regulation mechanism of surface waves was clarified in combination with modal analysis. The regulation laws of the surface wave band gap by geometric factors and material factors such as the lattice constant of the metamaterial structure, the radius of the inner oscillator, and the thickness of the outer constraint layer were further explored quantitatively. Through orthogonal experiments, the influence of each factor on the bandgap width and frequency were explored. Further on, through frequency-domain analysis with a finite period, the actual vibration reduction performance of this structure in track vibration isolation was verified. The results show that the metamaterial barrier has a complete band gap of 34.1-48.3Hz for Rayleigh waves and 20.8-62.3Hz for Love waves. The research results provide a theoretical basis for the practical application of metamaterial barriers and demonstrate their engineering application potential in the field of surface wave attenuation. |
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| 备注/Memo: | 收稿日期：2025-08-01 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：浙江省基础公益项目（LTGS23E080005） 第一作者：马梦蕾，硕士研究生，主要研究方向为智能材料与结构设计。E-mail: 1607569731@qq.com *通信作者：袁丽莉，博士/副教授，主要研究方向为智能材料与结构设计。E-mail: yuanlili@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
