论文标题
基于射线插入方法的声学镜头设计
Acoustic Lenses Design based on the Rays Inserting Method
论文作者
论文摘要
控制和操纵弹性波的能力对于诸如结构健康监测，信号处理和振动隔离等应用非常重要。在本文中，我们研究了使用射线插入方法的可行性，即最初提出的用于光学元素的方法，以设计用于弯曲波动操作的结构成分。边缘需要一个简单的过程，该过程允许在薄板中设计厚度变化，并为预期的波路带有理想的折射率分布。基于这种方法，设计和研究了将波前旋转45度旋转的焦点和准直镜和波导。进行了频域模拟和基于时间的实验表征。结果表明，边缘设计可变厚度结构的有效性用于操纵沿所需路径的弯曲波传播。
The ability to control and manipulate elastic waves is important for applications such as structural health monitoring, signal processing, and vibration isolations. In this paper, we investigated the feasibility of using the Rays Inserting Method, an approach originally proposed for optical elements, to design structural components for flexural wave manipulation. The RIM entails a simple process that allows to design thickness variations in a thin plate with a desirable refractive index distribution for an intended wave path. Based on this method, a focusing and collimating lens and a waveguide that rotates the wavefront by 45 degree were designed and studied. Frequency domain simulations and time-based experimental characterizations were carried out. The results demonstrated that the effectiveness of the RIM for designing variable thickness structures for manipulation of flexural wave propagation along desired paths.
