Low frequency and broadband vibration attenuation of a novel lightweight bidirectional re-entrant lattice metamaterial

被引：32
|
作者：
Ren, Fuguang [1 ]
Wang, Liang [1 ]
Liu, Haitao [1 ]
机构：
[1] Hebei Univ Technol, Natl Engn Res Ctr Technol Innovat Method & Tool, Sch Mech Engn, Tianjin 300401, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 299卷
基金：
中国国家自然科学基金;
关键词：
Porous materials; Simulation and modelling; Broad bandgap; Vibration attenuation; Low frequency; DESIGN;
D O I：
10.1016/j.matlet.2021.130133
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Lattice metamaterials have a great prospect in many application fields such as vibration control, noise reduction and sound insulation. In this work, a novel lightweight bidirectional re-entrant lattice metamaterial (BRLM) is proposed based on the square lattice metamaterial. Band structures of the BRLM are calculated through the finite element method and Bloch's theorem. The simulation results show that the broad bandgaps in the low frequency range are generated by rationally changing the geometrical parameters. The effects of geometrical parameters on the band structures, formation mechanics of the first bandgap and total effective bandgap width are investigated. The influence of damping on the transmission loss and bandgap distribution is also studied. (c) 2021 Elsevier B.V. All rights reserved.
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页数：5
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