基于周期声黑洞的二维结构嵌入声透镜
Two-Dimensional Structure-Embedded Acoustic Lenses based on Periodic Acoustic Black Holes
摘要：
最近的研究已经引入了一类新的二维声学超材料，其色散和传播特性的结果，从使用的声学黑洞（ABH）的形式的几何不均匀性。ABH是一种能够平滑弯曲和减慢弹性波的元件，因此提供了在更复杂的多材料和局部谐振设计中通常观察到的各种非常规色散和传播特性。这种方法使得薄壁结构元件具有完全嵌入的声学透镜，能够实现不同的功能，例如聚焦、准直和负折射。数值模拟表明，这种结构表现出宽带的操作条件，跨越超材料和声子范围。全场实验测量允许验证的设计方法，并确认嵌入式声透镜的性能。
英文摘要：
Recent studies have introduced a new class of two-dimensional acoustic metamaterials whose dispersion and propagation properties results from the use of geometric inhomogeneities in the form of Acoustic Black Holes (ABH). The ABH is an element able to smoothly bend and slow down elastic waves, therefore providing a variety of unconventional dispersion and propagation properties typically observed in more complex multi-material and locally resonant designs. This approach enables thin-walled structural elements having fully embedded acoustic lenses capable of different functionalities such as focusing, collimation, and negative refraction. Numerical simulations show that such structures exhibit broadband operating conditions that span both the metamaterial and the phononic range. Full field experimental measurements allow validating the design approach and confirm the performance of the embedded acoustic lens.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
