Page 40 - 应用声学2019年第2期

第 38 卷 第 2 期 Vol. 38, No. 2
2019 年 3 月 Journal of Applied Acoustics March, 2019

⋄ 研究报告 ⋄

二维磁流变包层声学超材料 ∗

许振龙 1,2† 吴福根 2

(1 广东科学技术职业学院机械与电子工程学院 珠海 519090)
(2 广东工业大学材料与能源学院 广州 510006)

摘要 该文构建了以钨为内核、环氧树脂为基体、磁流变弹性体作为包层的二维局域共振型声学超材料，采用
有限元方法分析了声波的能带结构、透射率、振动模。研究结果表明：利用外磁场可以调控磁流变弹性体包层
的弹性模量，从而调节声学超材料带隙的中心位置和宽度，还可以通过改变磁流变弹性体包层的厚度来调节
带隙的中心位置和宽度。这些方法对可调型声学超材料的设计有重要的参考意义。
关键词 声学超材料，磁流变弹性体，声子晶体，声波带隙
中图法分类号: O429, TB535 文献标识码: A 文章编号: 1000-310X(2019)02-0186-05
DOI: 10.11684/j.issn.1000-310X.2019.02.006

Two-dimensional magnetorheological cladding acoustic metamaterials

XU Zhenlong 1,2 WU Fugen 2

(1 School of Mechanical and Electronic Engineering, Guangdong Institute of Science and Technology,
Zhuhai 519090, China)
(2 Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China)

Abstract A two-dimensional local resonance acoustical metamaterial with tungsten as the core, epoxy resin
as the matrix, and magnetorheological elastomer as the cladding is constructed in this paper. And the phononic
band structure, transmittance, and vibration mode of the acoustic wave using the finite element method were
analyzed. The results of the study indicate that the external magnetic field can regulate the elastic modulus
of the magnetorheological elastomer coating, thereby adjusting the central position and width of the band
gap of the acoustic metamaterial. The central position and width of the band gap can also be adjusted by
changing the thickness of the magnetorheological elastomer coating. These methods have important reference
significance for the design of adjustable acoustic metamaterials.
Key words Acoustic metamaterial, Magnetorheological elastomer, Phononic crystal, Acoustic band gap

2018-06-16 收稿; 2018-10-17 定稿
广东省自然科学基金项目 (2015A030310412), 广东省教育厅特色创新类项目 (自然科学)(2017GKTSCX015), 广东科学技术职业学院
∗
校级基金培育项目 (XJPY2016009)
作者简介: 许振龙 (1976- ), 男, 福建莆田人, 博士, 副教授, 研究方向: 声子晶体、声学超材料。
† 通讯作者 E-mail: zhenlongxu1000@163.com