Controlling flexural waves in thin plates by using transformation acoustic metamaterials

doi:10.1088/1674-1056/27/5/057803

Abstract In this study, we design periodic grille structures on a single homogenous thin plate to achieve anisotropic acoustic metamaterials that can control flexural waves. The metamaterials can achieve the bending control of flexural waves in a thin plate at will by designing only one dimension in the thickness direction, which makes it easier to use this metamaterial to design transformation acoustic devices. The numerical simulation results show that the metamaterials can accurately control the bending waves over a wide frequency range. The experimental results verify the validity of the theoretical analysis. This research provides a more practical theoretical method of controlling flexural waves in thin-plate structures.

Keywords: acoustic metamaterials coordinate transformation flexural wave grille structure

Received: 11 October 2017
Revised: 06 March 2018
Accepted manuscript online:

PACS:	78.67.Pt	(Multilayers; superlattices; photonic structures; metamaterials)
	46.70.De	(Beams, plates, and shells)
	62.30.+d	(Mechanical and elastic waves; vibrations)

Corresponding Authors: Li Cai, Ji-Hong Wen
E-mail: cailiyunnan@163.com;wenjihong_nudt1@vip.sina.com

Cite this article:

Xing Chen(陈幸), Li Cai(蔡力), Ji-Hong Wen(温激鸿) Controlling flexural waves in thin plates by using transformation acoustic metamaterials 2018 Chin. Phys. B 27 057803

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