| 空气中正方形排列的大声阻抗柱体阵列的声波禁带 |
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| 引用本文： | 赵宏刚,刘耀宗,韩小云,温激鸿,王刚,郁殿龙.空气中正方形排列的大声阻抗柱体阵列的声波禁带[J].国防科技大学学报,2004,26(4):77-80 ,85. |
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| 作者姓名： | 赵宏刚 刘耀宗 韩小云 温激鸿 王刚 郁殿龙 |
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| 作者单位： | 国防科技大学机电工程与自动化学院,湖南,长沙,410073 |
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| 基金项目： | 国家重点基础研究发展规划资助项目(51307) |
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| 摘 要： | 采用平面波展开法,分析了一类声阻抗较大的圆柱体正方形周期排列在空气中形成的二维声子晶体声波禁带。数值计算结果表明,在柱体声阻抗远大于基体的条件下,声波禁带与柱体材料及其是否空心无关,而与柱体半径和晶格常数有关。
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| 关 键 词： | 声子晶体 声波禁带 基体 晶格常数 |
| 文章编号： | 1001-2486(2004)04-0077-04 |
| 收稿时间： | 2004/2/20 0:00:00 |
| 修稿时间： | 2004年2月20日 |
Phononic Band Gaps for Two-dimensional Square Array of the Large Acoustic Impedance Cylinders in Air |
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| ZHAO Honggang,LIU Yaozong,HAN Xiaoyun,WEN Jihong,WANG Gang and YU Dianlong.Phononic Band Gaps for Two-dimensional Square Array of the Large Acoustic Impedance Cylinders in Air[J].Journal of National University of Defense Technology,2004,26(4):77-80 ,85. |
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| Authors: | ZHAO Honggang LIU Yaozong HAN Xiaoyun WEN Jihong WANG Gang and YU Dianlong |
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| Institution: | College of Mechatronics Engineering and Automation, National Univ.of Defense Technology, Changsha 410073,China;College of Mechatronics Engineering and Automation, National Univ.of Defense Technology, Changsha 410073,China;College of Mechatronics Engineering and Automation, National Univ.of Defense Technology, Changsha 410073,China;College of Mechatronics Engineering and Automation, National Univ.of Defense Technology, Changsha 410073,China;College of Mechatronics Engineering and Automation, National Univ.of Defense Technology, Changsha 410073,China;College of Mechatronics Engineering and Automation, National Univ.of Defense Technology, Changsha 410073,China |
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| Abstract: | The band gaps of the two-dimensional phononic crystal composed of square array of cylinders in air are analyzed by the plane-wave expansion (PWE) method. The numerical result shows that the band gaps are independent of the physical parameter of the scatter if the acoustic impedance of the scatter is much greater than that of the matrix. So the band gaps are determined by the radius of the cylinders and the lattice constant. It doesn't matter whether the cylinders are hollow or not. |
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| Keywords: | phononic crystal phononic band gaps matrix lattice constant |
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