Theoretical and experimental study on two-dimensional binary locally resonant phononic crystals
首发时间:2006-01-13
Abstract:The theoretical prediction of a locally resonant band gap in two-dimensional binary phononic crystals is verified experimentally. Numerical simulations show that the in-plane subfrequency gap exists in the thin plate of phononic crystal is much wider than that in the bulk of phononic crystal. Theoretical analysis shows that this is due to the different pure shearing/compressing module ratios in the thin plate and the bulk. The band gap edges as well as the mid-gap attenuations of finite samples are studied with different filling fractions, elastic parameters and densities of host medium. Vibration experiments are conducted with two thin plates of two-dimensional binary locally resonant phononic crystal, which are with and without holes respectively. The measured subfrequency gaps are in good agreement with the theoretical predictions.
keywords: Phononic crystal Vibration band gap Locally resonant
点击查看论文中文信息
二维局域共振声子晶体理论及实验研究
摘要:应用集中质量法和有限元法研究了二维二组元局域共振声子晶体板和体中弹性波的传播。理论表明在板中才存在较宽的低频禁带。这是由于板和体中不同的纯剪切和纯压缩模量比例导致的。 研究了带隙起始和终止频率以及带隙中心衰减与填充率、基体密度和刚度的关系。针对8×8有限尺寸样件进行了振动测试,测试得到的低频禁带和理论计算结果吻合。
关键词: 声子晶体; 振动带隙; 局域共振
论文图表:
引用
No.4997409641137125****
同行评议
共计0人参与
勘误表
二维局域共振声子晶体理论及实验研究
评论
全部评论