| 固/固型二维正方晶格声子晶体缺陷态研究* |
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| 引用本文： | 江卫锋,殷鸣,殷国富,向召伟,邓珍波.固/固型二维正方晶格声子晶体缺陷态研究*[J].应用声学,2016,35(5):410-416. |
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| 作者姓名： | 江卫锋 殷鸣 殷国富 向召伟 邓珍波 |
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| 作者单位： | 四川大学制造科学与工程学院,四川大学制造科学与工程学院,四川大学制造科学与工程学院,四川大学制造科学与工程学院,四川大学制造科学与工程学院 |
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| 基金项目： | 国家自然科学基金项目编号：(51075419)和四川省科技支撑计划项目（编号：2016GZ0195）资助 |
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| 摘 要： | 固/固型声子晶体在抑制噪音和隔离振动等工程领域有着潜在的应用。利用有限元方法对存在缺陷的二维正方晶格金/环氧树脂声子晶体进行了研究,数值计算结果表明弹性波在点缺陷处局域,带隙中出现多条缺陷模,点缺陷数目的增加对声子晶体局域特性产生显著影响;弹性波沿着线缺陷传播形成波导,改变线缺陷结构可以改变弹性波传播方向和实现信号的分离。对声子晶体缺陷特性的研究可为声学滤波器和波导等器件的设计提供参考。
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| 关 键 词： | 声子晶体 点缺陷 线缺陷 有限元法 |
| 收稿时间： | 2015/12/30 0:00:00 |
| 修稿时间： | 2016/8/10 0:00:00 |
Investigation of defect modes for two-dimensional solid/solid phononic crystals with square lattice |
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| Jiang Weifeng,Yin Ming,Yin Guofu,Xiang Zhaowei and Deng Zhenbo.Investigation of defect modes for two-dimensional solid/solid phononic crystals with square lattice[J].Applied Acoustics,2016,35(5):410-416. |
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| Authors: | Jiang Weifeng Yin Ming Yin Guofu Xiang Zhaowei and Deng Zhenbo |
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| Institution: | Department of Manufacturing science and Engineering,Sichuan University,Department of Manufacturing science and Engineering,Sichuan University,Department of Manufacturing science and Engineering,Sichuan University,Department of Manufacturing science and Engineering,Sichuan University,Department of Manufacturing science and Engineering,Sichuan University |
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| Abstract: | The two-dimensional gold/expoxy phononic crystal in square lattice with defects are investigated using the finite element method .The numerical results show that elastic wave locates in point defect,and defect modes present in band gaps and the increase of the number of point defects significantly affects the localized modes of cavities.The elastic wave propagates along the line defect formatting waveguide and the change of the line defect structure can change the direction of elastic wave propagation and separate the signal.The research on the defect characteristics of the phononic crystal can provide a reference for the design of acoustic filters and waveguides. |
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| Keywords: | Phononic crystals Point defect Line defect The finite element methods |
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