Research on phononic crystal architectures has produced many interesting designs in the past years, with useful wave manipulation properties. However, not all of the proposed designs can lead to convenient realizations for practical applications, and only a limited number of them have actually been tested experimentally to verify numerical estimations and demonstrate their feasibility. In this work, we propose a combined numerical-experimental procedure to characterize the dynamic behavior of metamaterials, starting from a simplified 2D design to a real 3D manufactured structure. To do this, we consider a new design of a resonator-type geometry for a phononic crystal, and verify its wave filtering properties in wave propagation experiments. The proposed geometry exploits a circular distribution of cavities in a homogeneous material, leading to a central resonator surrounded by thin ligaments and an external matrix. Parametric simulations are performed to determine the optimal thickness of this design, leading to a large full band gap in the kHz range. Full-field experimental characterization of the resulting phononic crystal using a scanning laser Doppler vibrometer is then performed, showing excellent agreement with numerically predicted band gap properties and with their resulting effects on propagating waves. The outlined procedure can serve as a useful step towards a standardization of metamaterial development and validation procedures.

近年来，对声子晶体结构的研究已经产生了许多有趣的设计，它们具有有用的波控制特性。但是，并非所有建议的设计都可以为实际应用带来方便的实现，并且实际上只有有限数量的设计已经通过实验测试以验证数值估计并证明其可行性。在这项工作中，我们提出了一种组合的数值实验程序来表征超材料的动态行为，从简化的2D设计到真实的3D制造结构开始。为此，我们考虑一种用于声子晶体的谐振器型几何结构的新设计，并在波传播实验中验证其波滤波特性。拟议的几何形状利用了均质材料中的圆形空腔分布，导致中央谐振器被薄韧带和外部矩阵包围。执行参数仿真以确定该设计的最佳厚度，从而导致kHz范围内的大全带隙。然后使用扫描激光多普勒振动计对所得声子晶体进行全场实验表征，显示出与数值预测的带隙特性及其对传播波的影响极佳的一致性。概述的程序可以作为迈向超材料开发和验证程序标准化的有用步骤。然后使用扫描激光多普勒振动计对所得声子晶体进行全场实验表征，显示出与数值预测的带隙特性及其对传播波的影响极佳的一致性。概述的程序可以作为迈向超材料开发和验证程序标准化的有用步骤。然后使用扫描激光多普勒振动计对所得声子晶体进行全场实验表征，显示出与数值预测的带隙特性及其对传播波的影响极佳的一致性。概述的程序可以作为迈向超材料开发和验证程序标准化的有用步骤。