Application of Paper Folding Technique to Three-Dimensional Space Sound Absorber with Permeable Membrane: Case Studies of Trial Productions
Application of Paper Folding Technique to Three-Dimensional Space Sound Absorber with Permeable Membrane: Case Studies of Trial Productions
复制标题
折纸技术在三维空间透膜吸声体中的应用：试制案例
DOI：
10.20855/ijav.2020.25.21657
复制
发表时间：
2020
影响因子：
1
通讯作者：
M. Toyoda
中科院分区：
文献类型：
--
作者：
K. Sakagami;Takeshi Okuzono;Hirotaka Suzuki;N. Koyanagi;M. Toyoda
作者提出了一种由渗透膜（PM）制成的空间吸声器，包括三维形状的织造或非织造织物，例如，圆柱形，矩形等。建议的吸收器进行了检查，通过实验测量和边界元分析，发现它们可以有效地使用，特别是在中，高频率。为了开发这些吸收器用于更广泛的应用，期望赋予它们附加的值和功能，特别是详细说明它们的设计。假设他们也可以用于照明设备，如灯罩作为应用之一，伪圆柱形和伪球形PM空间吸收器与纸折叠（折纸技术）产生的不均匀表面进行了试点研究。伪圆柱凹曲面（PCCC）壳体形状已被证明是一种适用于灯罩的形状，而伪球面凹曲面（PSCC）壳体形状是PCCC壳体形状的一种应用。在本文中，PCCC和PSCC壳形状被应用到三维PM空间吸收器，并使用通过流阻测量和初步模拟选择的PM进行试验。在混响室中测量了两种试件的吸声系数，在中高频时，PCCC和PSCC的吸声系数分别为0.6和0.4。
The authors propose a space sound absorber made of a permeable membrane (PM), including woven or non-woven fabrics in three-dimensional shapes, e.g., cylinder, rectangle, etc. The proposed absorbers are examined by experimental measurements and boundary element analyses, and it is found that they can be effectively used especially for middle and high frequencies. In order to develop these absorbers for wider applications, it would be desirable to give them additional values and functions, particularly to elaborate on their design. Supposing that they could also be used for lighting equipment, such as lampshades as one of the applications, pilot studies on pseudo-cylindrical, and pseudo-spherical PM space absorbers with uneven surfaces produced by paper-folding (origami technique) are carried out. The pseudo-cylindrical concave curves (PCCC) shell shape has been proven as a suitable form for a lampshade, and the pseudo-spherical concave curves (PSCC) shell shape is an application of PCCC. In this paper, PCCC and PSCC shell shapes are applied to three-dimensional PM space absorbers, and trials are conducted using PMs selected by flow resistance measurements and preliminary simulations. The sound absorptivity of the specimens is measured in a reverberation chamber, and their absorptivity is 0.6 (PCCC case) and 0.4 (PSCC case) at mid-high frequencies.