Directional Propagation Characteristics of Flexural Waves in Two-Dimensional Thin-Plate Phononic Crystals  

作　　者：温激鸿 郁殿龙 王刚 赵宏刚 刘耀宗 温熙森 

机构地区：[1]Institute of Mechatronical Engineering, National University of Defense Technology, Changsha 410073

出　　处：《Chinese Physics Letters》2007年第5期1305-1308,共4页中国物理快报（英文版）

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.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.

关 键 词：PERIODIC STRUCTURES BAND-STRUCTURE PHOTONIC CRYSTALS ELASTIC-WAVES GAPS COMPOSITES RADIATION 

分 类 号：O43[机械工程—光学工程]