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基于固体软板与空心圆柱双负声超常材料实现
引用本文:邓科,宋宗根,赵鹤平.基于固体软板与空心圆柱双负声超常材料实现[J].吉首大学学报(自然科学版),2016,37(2):22-25.
作者姓名:邓科  宋宗根  赵鹤平
作者单位:(吉首大学物理与机电工程学院,湖南 吉首 416000)
基金项目: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)
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  

Double Negative Acoustic Metamaterials Based on a Soft Slid Plate and Hollow Steel Cylinders
DENG Ke,SONG Zonggen,ZHAO Heping.Double Negative Acoustic Metamaterials Based on a Soft Slid Plate and Hollow Steel Cylinders[J].Journal of Jishou University(Natural Science Edition),2016,37(2):22-25.
Authors:DENG Ke  SONG Zonggen  ZHAO Heping
Institution:(College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China)
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.
Keywords:acoustic metamaterials                                                                                                                        negative mass density                                                                                                                        negative bulk modulus
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