论文期刊

Extremely low frequency band gaps of beam-like inertial amplification metamaterials




作者: Mingming Hou, Jiu Hui Wu, Songhua Cao and Dong Guan
发表/完成日期: 2017-10-02
期刊名称: Modern Physics Letters B
期卷: Vol.31, No.27,2017
相关文章: 侯明明s0217984917502517.pdf   
论文简介
In this paper, extremely low frequency band gaps of beam-like inertial amplification
metamaterials are investigated based on local resonance theory. Inertial amplification
mechanism is proposed to obtain extremely low frequency band gaps by altering geometry parameters of the beam-like structures rather than modulating material properties,
which allow first lower band gap (BG) to be attained easily compared to traditional
local resonance structures. Band structures, frequency response functions (FRFs) plots
and vibration modes of the beam-like structures are calculated and analyzed by employing finite element method. Numerical results show that first BG of the structure ranges
from 23 Hz to 21 Hz. FRFs are in accordance with the dispersion relationship. It is
found that interaction between inertial amplification and traveling wave modes in the
proposed structure are responsible for formation of the first BG. This type of beam-like
inertial amplification metamaterials has many potential applications in the field of low
frequency vibration and noise reduction.