声子晶体滤波特性研究

The Research of Filtering Characteristics in Phononic Crystals

声子晶体的滤波特性引起了科技工作者的广泛关注.在二维三组元局域共振声子晶体中,通过引入两种不同填充率的共振单元分别位于规则的六角形的角顶和中心构成的缺陷态波导结构,以此为基础构建声子晶体相应的实验模型,然后基于Comsol仿真平台,模拟特定频率的声波激励声子晶体过程,计算声子晶体幅频响应函数。仿真结果表明,声子晶体可以方便设计出新型的高效、声滤波器。

Filtering of sound waves in phononic crystals has been particularly and widespread concerned by many scientists and technical workers. By introducing two different filling rate of resonance unit which located in the Angle of the rules of the hexagonal top and center into two-dimensional three-component locally resonant phononic crystal,on the basis, corresponding experimental model of phononic crystals was built. Based on comsol simulation platform, Acoustic wave frequency specific incentivephononic crystal process was simulated. Phononic crystal amplitude frequency response function was obtained. The experimental results show that the Phononic crystal can be convenient to design efficient, acoustic filter.