朱红伟,林亨泽,曹海江,张新超,史庆藩

• 1:包头师范学院物理科学与技术学院
• 2:防灾科技学院理学院

摘要(Abstract)：

本文利用周期性声子晶体实验平台,通过测试木柱、木柱-珍珠棉(EPE)复合体及珍珠棉空筒三种振子形式,结合四方排布与三角排布两种周期性排列结构,系统探究了不同参数对声子晶体带隙特性的影响。实验结果表明:四方排布木柱阵列相比三角排布显著扩宽带隙(BG1带宽1.2k Hz～0.7k Hz;BG2带宽1.6k Hz～0.9k Hz);木柱-珍珠棉复合振子通过耦合布拉格散射与局域共振,将高频带隙延展至8kHz(BG2带宽4.7k Hz),同时提升低频吸声效率20%。该实验在厘米级周期结构中实现1.3～8.0k Hz宽带噪声抑制,为交通及工业场景(如1～2k Hz机械噪声、2～6k Hz变压器噪声)的声子晶体降噪设计提供关键参数依据。另外,本文的实验设计还可以作为研究性实验的内容纳入大学物理实验教学,帮助学生深入理解带隙的概念以及物理在工程应用中的重要性。

关键词(KeyWords)： 声子晶体;带隙特性;噪声抑制;复合振子;布拉格散射;局域共振

Abstract:

Keywords:

基金项目(Foundation): 内蒙古自治区自然科学基金（No.2023QN01015）;; 河北省大学生创新创业训练计划项目（No.202411775154）;; 包头师范学院高层次人才引进科研启动基金（No.BTTCRCQD2023-007）

作者(Author): 朱红伟,林亨泽,曹海江,张新超,史庆藩

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