一维铝/铅匀直杆状声子晶体带隙特性分析

通过单一改变组分材料铝或者铅的密度，以及单一改变晶格常数的取值来调节一维铝/铅匀直杆状声子晶体的带隙分布情况。结果表明：该声子晶体中，当单一增大每种材料的密度时，散射体与基体材料的密度差值增大，其入射波散射就更为强烈，也就越容易产生低频带隙；当单一增大声子晶体的晶格常数，即增加复合结构的长度时，入射波散射得就越多，透射波就越来越少，该声子晶体带隙便呈现出向低频率区域靠近的特性。

A Research on Characteristics of Band Gap of One-Dimensional Straight Aluminum/Lead Phononic Crystals

By changing the density of aluminum or lead and changing the value of the lattice constant, this article reports various band-gap distributions of the one-dimensional aluminum/lead straight rod phononic crystal. When the density of aluminum or lead is changed, the density of the scatterer will be larger than that of the matrix material, the incident waves scattered more powerfully, and the low-frequent band gap obtained more easily. If the lattice constant is changed by lengthening the compound structure, more incident waves and less transmission waves will be produced. Characteristically, the band gap of the phononic crystal moves toward the low-frequency zone.