类正方阿基米德格子声子晶体带隙稳定性实验研究  

Experimental Investigation on Band Gaps Stability for Two-Dimensional Phononic Crystal with Square-Like Archimedean Lattice

作　　者：赵寰宇[1] 何存富[2] 吴斌[2] 李凤莲[1] 

机构地区：[1]北京交通大学工程力学研究所,北京100044 [2]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《人工晶体学报》2013年第5期891-895,共5页Journal of Synthetic Crystals

基　　金：中央高校基本科研业务费专项资金(2012JBM086);国家自然科学基金(10632020)

摘　　要：基于平面波展开法和超声浸水透射技术,理论和实验研究了二维(32.4.3.4)格子钢/水声子晶体带隙性质。与正方晶格钢/水声子晶体相比,类正方(32.4.3.4)格子能够打开高频带隙,并进一步讨论了第一布里渊区Γ-X、Γ-M方向层厚和方向带隙稳定性关系,这为设计有限尺寸隔声材料提供依据。结果表明:带隙的频率范围和理论计算很好吻合。The band gaps of phononic crystal(PC) composed of(32.4.3.4) lattice array of circular steel cylinders in water have been investigated both theoretically and experimentally with the plane wave expansion method and the ultrasonic immersion transmission technique.Compared with the PC consisting of square array of circular steel cylinders in water at the same radius and distance between the adjacent steels cylinders,the(32.4.3.4) lattice PC may open the two band gaps in the range of higher frequency.The transmission spectra of different layers of(32.4.3.4) lattice PC were measured experimentally along the Γ-X and Γ-M directions of first irreducible Brillouin zone.The relations of band gaps stability and layers can be discussed in detail.This is better advantage of design for the finite-sized isolating noise materials.A good agreement between the frequency range of transmission spectra of acoustic waves for this crystal and theoretical predict with plane wave expansion method is observed.

关 键 词：(32 4 3 4)格子 实验研究 带隙稳定性 声子晶体 

分 类 号：O73[理学—晶体学] TB52[理学—物理]