Reconfigurable Acoustic Arrays With Deployable Structure Based on a Hoberman–Miura System Synthesis
Reconfigurable Acoustic Arrays With Deployable Structure Based on a Hoberman–Miura System Synthesis
复制标题
DOI：
10.1115/1.4048745
复制
发表时间：
2021-06
影响因子：
3.3
通讯作者：
Ningxiner Zhao;R. Harne
中科院分区：
文献类型：
--
作者：
Ningxiner Zhao;R. Harne
弯曲表面通常用于辐射和聚焦声波。然而，当为了可部署性需要而镶嵌到可重新配置的表面中时，折纸启发的声学阵列可能具有挑战性以保持弯曲形状并且可能不保持平坦的可折叠性。另一方面，诸如霍伯曼环的可展开机构与许多折纸镶嵌一样是低维的，并且由于理想的刚性杆组成而可以容易地保持弯曲形状。本研究探讨了Hoberman环和Miura ori镶嵌之间的接口，保持运动学和几何兼容性，以保持声音聚焦的弯曲形状。三浦织刻面被认为是像有挡板的活塞一样振动，并产生从环形结构辐射的声波。建立了一个分析模型来揭示由Hoberman-Miura系统综合产生的声学阵列的近场声学行为。声波聚焦能力的审查和验证，通过验证的原理实验。研究揭示了波聚焦现象不同的这种表现形式的声学阵列，并揭示了设计和操作的影响波聚焦效果。结果鼓励探索新的接口之间的可重构机制和折纸设备的低维形状的变化是理想的。[DOI 10.1115/1.4048745]
Curved surfaces are often used to radiate and focus acoustic waves. Yet, when tessellated into reconfigurable surfaces for sake of deployability needs, origami-inspired acoustic arrays may be challenging to hold into curved shape and may not retain flat foldability. On the other hand, deployable mechanisms such as the Hoberman ring are as low-dimensional as many origami tessellations and may maintain curved shape with ease due to ideal rigid bar compositions. This research explores an interface between a Hoberman ring and Miura-ori tessellation that maintain kinematic and geometric compatibility for sake of maintaining curved shapes for sound focusing. The Miura-ori facets are considered to vibrate like baffled pistons and generate acoustic waves that radiate from the ring structure. An analytical model is built to reveal the near field acoustic behavior of acoustic arrays resulting from a Hoberman–Miura system synthesis. Acoustic wave focusing capability is scrutinized and validated through proof-of-principle experiments. Studies reveal wave focusing phenomena distinct to this manifestation of the acoustic array and uncover design and operational influences on wave focusing effectiveness. The results encourage exploration of new interfaces between reconfigurable mechanisms and origami devices where low-dimensional shape change is desired. [DOI: 10.1115/1.4048745]