中国物理B ›› 2018, Vol. 27 ›› Issue (5): 57803-057803.doi: 10.1088/1674-1056/27/5/057803

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Controlling flexural waves in thin plates by using transformation acoustic metamaterials

Xing Chen(陈幸), Li Cai(蔡力), Ji-Hong Wen(温激鸿)   

  1. 1 Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha 410073, China;
    2 College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2017-10-11 修回日期:2018-03-06 出版日期:2018-05-05 发布日期:2018-05-05
  • 通讯作者: Li Cai, Ji-Hong Wen E-mail:cailiyunnan@163.com;wenjihong_nudt1@vip.sina.com

Controlling flexural waves in thin plates by using transformation acoustic metamaterials

Xing Chen(陈幸)1,2, Li Cai(蔡力)1,2, Ji-Hong Wen(温激鸿)1,2   

  1. 1 Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha 410073, China;
    2 College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China
  • Received:2017-10-11 Revised:2018-03-06 Online:2018-05-05 Published:2018-05-05
  • Contact: Li Cai, Ji-Hong Wen E-mail:cailiyunnan@163.com;wenjihong_nudt1@vip.sina.com

摘要: 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.

关键词: acoustic metamaterials, coordinate transformation, flexural wave, grille structure

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.

Key words: acoustic metamaterials, coordinate transformation, flexural wave, grille structure

中图分类号:  (Multilayers; superlattices; photonic structures; metamaterials)

  • 78.67.Pt
46.70.De (Beams, plates, and shells) 62.30.+d (Mechanical and elastic waves; vibrations)