| Directional Propagation Characteristics of Flexural Waves in Two-Dimensional Thin-Plate Phononic Crystals |
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| 作者姓名： | 温激鸿 郁殿龙 王刚 赵宏刚 刘耀宗 温熙森 |
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| 作者单位： | Institute of Mechatronical Engineering, National University of Defense Technology, Changsha 410073 |
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| 基金项目： | Supported by the 973 State Key Development Programme for Basic Research of China under Grant No 51307. |
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| 摘 要： | The propagation characteristics of flexural waves in two-dimensional thin-plate phononic crystals （PCs） are analysed with the plane wave expansion （PWE） method to yield phase constant surfaces, which predict high directivity of flexural wave propagation for certain frequencies outside the band gap. The prediction is validated through the computation of the harmonic responses of a finite structure with 9 × 9 unit cells. The results indicate that directional propagation of flexural waves is an while specific effects of the directional propagation in inherent characteristic of two-dimensional thin-plate PCs a finite structure vary with the positions of excitations.
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| 关 键 词： | 光子晶体 曲折波 转播特性 方向性 |
| 收稿时间： | 2006-11-23 |
| 修稿时间： | 2006-11-23 |
Directional Propagation Characteristics of Flexural Waves in Two-Dimensional Thin-Plate Phononic Crystals |
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| WEN Ji-Hong,YU Dian-Long,WANG Gang,ZHAO Hong-Gang,LIU Yao-Zong,WEN Xi-Sen.Directional Propagation Characteristics of Flexural Waves in Two-Dimensional Thin-Plate Phononic Crystals[J].Chinese Physics Letters,2007,24(5):1305-1308. |
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| Authors: | WEN Ji-Hong YU Dian-Long WANG Gang ZHAO Hong-Gang LIU Yao-Zong WEN Xi-Sen |
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| Affiliation: | Institute of Mechatronical Engineering, National University of Defense Technology, Changsha 410073 |
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| Abstract: | The propagation characteristics of flexural waves in two-dimensional thin-plate phononic crystals (PCs) are analysed with the plane wave expansion (PWE) method to yield phase constant surfaces, which predict high directivity of flexural wave propagation for certain frequencies outside the band gap. The prediction is validated through the computation of the harmonic responses of a finite structure with 9×9 unit cells. The results indicate that directional propagation of flexural waves is an inherent characteristic of two-dimensional thin-plate PCs while specific effects of the directional propagation in a finite structure vary with the positions of excitations. |
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| Keywords: | 43 40 +s 46 40 Cd 62 30 +d |
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