Localization of waves in double-negative acoustic metamaterial multilayers with thickness disorder
Localization of waves in double-negative acoustic metamaterial multilayers with thickness disorder
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DOI：
10.1080/17455030.2023.2173501
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发表时间：
2023-02
影响因子：
--
通讯作者：
T. Terao
中科院分区：
文献类型：
--
作者：
T. Terao
双负声学超材料的研究，除其他外，在声学系统中实现声学阻尼和抑制波的局部化构成了一个有趣的研究领域。本文研究了含双负声学超材料的一维随机系统中的振动波。利用参与数分析了厚度无序的声学超材料多层中波的局域性。在DN波段内，在有效质量接近于零的特征频率附近，观察到PN变得非常大。对具有斐波那契序列的声学超材料多层膜的透光率与频率的关系进行了数值研究。
The investigation of double-negative acoustic metamaterials for, among other things, achieving acoustic damping and the suppression of the localization of waves in acoustic systems constitutes an interesting field of study. Vibrational waves in one-dimensional random systems containing double-negative acoustic metamaterials are investigated in this study. Participation number is used to analyze the localization of waves in acoustic metamaterial multilayers with thickness disorder. PN is observed to become very large inside the DN band near the characteristic frequency where the effective mass approaches zero. For acoustic metamaterial multilayers following the Fibonacci sequence, the frequency dependence of their transmittance was numerically investigated.