一维铝/非金属、花岗岩/非金属声子晶体的带隙特点  

The band gap characteristics of one dimensional phononic crystals of aluminum/nonmetal and granite/no mmetal

作　　者：胡丽芬[1] 徐超[1] 董兴成[1] 岳蕾蕾[1] 刘应开[1] 

机构地区：[1]云南师范大学物理系,云南昆明650092

出　　处：《云南师范大学学报（自然科学版）》2010年第3期49-51,共3页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：国家自然科学基金(10764005);教育部新世纪优秀人才支持计划项目支持(NCET-08-0926);云南省自然科学基金(06A0025Q;2007PY01-41);云南省教育厅基金(06Y091)

摘　　要：运用集中质量法计算了一维铝/非金属、花岗岩/非金属声子晶体的振动带隙。结果表明:在相同条件下,铝、花岗岩与同一非金属组合成的声子晶体带隙几乎相同,而弹性模量、泊松比对带隙结构几乎无影响,带隙主要由这两种材料的密度决定。The vibration band gaps of one - dimensional phononic crystals of aluminum/nonmetal and granite/nonmetal are investigated by lumped - mass method. The effects of the density, elastic modulus and Poisson ratio on band gaps are discussed. The results show that the band gaps of aluminum/nonmetal （A） phononic crystals are as wide as those of granite/nonmetal （A） under the same conditions. Other parameters such as elastic modulus and Poisson ratio have almost no effects on the vibration band gaps of one - dimensional phononic crystals. Moreover, the vibration band gaps of aluminum/nonmetal （A） and granite/nonmetal （A） mainly have a relationship with the densities of granite and aluminum.

关 键 词：声子晶体 振动带隙 集中质量法 

分 类 号：O482.1[理学—固体物理]