论文标题
用于宽带结构波和波导的双功能结构伦尼堡镜头
Bi-functional Structural Luneburg Lens for Broadband Structural Wave Cloaking and Waveguide
论文作者
论文摘要
在本文中，我们探讨了结构性Luneburg镜头（SLL）的概念，作为执行动态结构剪裁的设计框架，以获得结构波斗篷和结构波导。 SLL是分级的折射率镜头，它通过使用薄板中定义的可变厚度结构来实现。由于板的厚度变化，折射率从镜头的中心到外表面径向减小。通过利用SLL的独特功能来进行弯曲波的聚焦和准确性，我们基于级联的SLL开发了结构波斗篷和波导。级联的SLL设计使功能设备可以将功能设备集成到薄壁结构中，同时保留结构特性。进行了分析，数值和实验研究，以表征SLL斗篷和SLL波导的性能。结果表明，这些级联的SLL设备在宽带操作频率范围内表现出出色的结构波浪和波形性能。
In this paper, we explore the concept of structural Luneburg Lens (SLL) as a design framework for performing dynamic structural tailoring to obtain a structural wave cloak and a structural waveguide. The SLL is a graded refractive index lens, which is realized by using a variable thickness structure defined in a thin plate. Due to the thickness variation of the plate, the refractive index decreases radially from the centre to the outer surface of the lens. By taking advantage of the unique capabilities of SLL for flexural wave focusing and collimation, we develop a structural wave cloak and waveguide based on cascaded SLLs. The cascaded SLL design enables the integration of functional devices into thin-walled structures while preserving the structural characteristics. Analytical, numerical, and experimental studies are carried out to characterize the performance of the SLL cloak and the SLL waveguide. The results demonstrate that that these cascaded SLL devices exhibit excellent performance for structural wave cloaking and waveguiding over a broadband operating frequency range.
