Peng Xiuyuan, Ji Jun, Jing Yun
School of Physics, Nanjing University, Nanjing, Jiangsu 210093, China.
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA
J Acoust Soc Am. 2018 Oct;144(4):EL255. doi: 10.1121/1.5055847.
Composite honeycomb sandwich panels have been adopted in a wide range of applications owing to their excellent mechanical properties. This paper demonstrates a design of a composite honeycomb metasurface panel that can achieve 90% sound absorption from 600 to 1000 Hz with a thickness less than 30 mm. The panel is comprised of periodically and horizontally arranged honeycomb "supercells" which consist of unit cells of different geometric parameters (pore size). Two different analytical models (Helmholtz resonator model and micro-perforated panel model) are used to calculate the sound absorption of the panel, and they are further validated by a numerical model. The relatively broadband sound absorption is found to be attributed to the coupling between unit cells, which is illustrated by both the complex frequency plane theory and the calculated sound intensity field.
由于其优异的力学性能，复合蜂窝夹芯板已被广泛应用于各种领域。本文展示了一种复合蜂窝超表面板的设计，该板厚度小于30毫米，在600至1000赫兹范围内可实现90%的吸声率。该板由周期性水平排列的蜂窝“超级单元”组成，这些超级单元由具有不同几何参数（孔径）的单元组成。使用两种不同的分析模型（亥姆霍兹共振器模型和微穿孔板模型）来计算该板的吸声率，并通过数值模型进一步验证。发现相对较宽频带的吸声归因于单元之间的耦合，复频平面理论和计算出的声强场都对此进行了说明。
