Low-Frequency Band Gap Mechanism of Radial Elastic Metamaterial with New Ring Resonance

被引：0
作者：
Li L. [1 ,2 ]
Yang J. [1 ]
Lu R. [1 ]
Xie M. [1 ,2 ]
机构：
[1] School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an
[2] Institute of Mechanics Technology, Xi'an University of Architecture and Technology, Xi'an
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2020年 / 54卷 / 11期
关键词：
Band gap; Local resonance; Radial elastic metamaterial;
D O I：
10.7652/xjtuxb202011011
中图分类号：
学科分类号：
摘要：
In this paper, theoretical investigation of the new type of ring resonance radial elastic metamaterial plate structure is conducted, which aims at the problem that the radial elastic metamaterial structure with low-frequency vibration damping band gap is not easy to process and cannot meet industrial needs. In contrast to the traditional structure, the proposed new structure is created by an external octagon and an internal structure connected by connecting blocks. Finite element calculation results show that the two complete band gaps in the dispersion relations coincide with the band gap in the transmission spectra of the finite period structure, in which the first band gap is 2 171.9 - 2 716.9 Hz and the second band gap is 4 747.5 - 9 067.5 Hz. By analyzing the intrinsic displacement field of special points at the band gap boundary the formation mechanism of first and second band gap is attributed to the internal structure and local resonance of octagonal matrix. Furthermore, the effects of the geometrical parameters on the band gaps are further explored numerically. Results show that the internal structure radius and connection block width geometrical parameters will affect the quality of the internal structure and the equivalent rigidity of the connection block, and thus affect all changes in the band gap, while the width of the octagonal matrix only has a large effect on the high frequency band gap. These characteristics of band gap in the proposed radial elastic metamateria can potentially be applied to industrial equipment. © 2020, China Food Publishing Company. All right reserved.
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页码：91 / 97
页数：6
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