吉首大学学报(自然科学版)

• 物理与电子 • 上一篇    下一篇

基于固体软板与空心圆柱双负声超常材料实现

邓科,宋宗根,赵鹤平   

  1. (吉首大学物理与机电工程学院,湖南 吉首 416000)
  • 出版日期:2016-03-25 发布日期:2016-05-11
  • 作者简介:邓科(1978—),男,湖南湘潭人,吉首大学物理与机电工程学院副教授,博士,硕士生导师,主要从事凝聚态物理研究.
  • 基金资助:

    国家自然科学基金资助项目(11464012,11564012,11564013);湖南省高等学校科学研究项目(13A077)

Double Negative Acoustic Metamaterials Based on a Soft Slid Plate and Hollow Steel Cylinders

DENG Ke,SONG Zonggen,ZHAO Heping   

  1. (College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2016-03-25 Published:2016-05-11

摘要:

在环氧树脂软板中周期性引入钢柱,利用其表面模集体共振激发,实现了负的有效质量密度响应.在空心钢柱周期性切缝构造亥姆赫兹共振腔结构,实现了负的体模量响应.复合以上2种结构,实现了质量密度和体模量同时为负的双负声超常材料.与现有的基于三维共振单元的双负材料相比,这种基于二维共振单元的双负超常材料结构更简单,易于制备.

关键词: 声超常材料, 负质量密度, 负体模量

Abstract:

A water-immersed epoxy plate injected with periodical steel columns is designed to achieve negative-dynamic-mass response,which arises from the collective excitation of surface modes in the plate.A slit hollow steel cylinder immersed in water is designed as a Helmholtz resonator to achieve negative bulk modulus.By combining these two designed structures together,an acoustic metamaterial simultaneously possessing a negative mass density and bulk modulus is realized.Compared to previous realized three-dimensional double negative metamaterials,this two-dimensional double negative metamaterial is much easy to be fabricated.

Key words: acoustic metamaterials, negative mass density, negative bulk modulus

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