Acoustic Wave Focusing From Reconfigurable Acoustic Arrays Based on a Bricard-Miura Synthesis
Acoustic Wave Focusing From Reconfigurable Acoustic Arrays Based on a Bricard-Miura Synthesis
复制标题
基于 Bricard-Miura 合成的可重构声阵列的声波聚焦
DOI：
10.1115/1.4054252
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Harne, Ryan L.
中科院分区：
文献类型：
--
作者：
Bentley, Christopher S.;Harne, Ryan L.
最近的研究表明，从刚性折纸结构的启发，可重构的声学阵列可以用来辐射和聚焦声波。然而，有必要探索的单自由度部署集成与这样的阵列，为了剪裁波聚焦。本研究探讨一个可重构的声学阵列的启发，从一个规则的三浦ori单位细胞和三重对称布里卡链接。该系统的重点是声波和单自由度运动时，与修改后的三重对称Bricard联动。三种配置的阵列进行了分析，其中，被认为是朝向中心轴会聚的阵列小平面像挡板活塞一样振动，并产生声波进入周围的流体。分析模型的构建，以探讨近场声聚焦行为的建议声阵列。通过原理验证实验验证了阵列的波聚焦能力。结果表明，阵列的波聚焦受到小平面几何参数以及小平面与中心轴的相对距离的影响，与简化的射线声学估计一致。这些发现强调了聚焦声辐射体和几何声学原理之间的基本关系。结果鼓励更广泛的探索声阵列设计的灵感来自集成的单自由度的联系和折纸结构，为了简单的阵列部署和重新配置。
Recent studies have shown that reconfigurable acoustic arrays inspired from rigid origami structures can be used to radiate and focus acoustic waves. Yet, there is a need for exploration of single-degree-of-freedom deployment to be integrated with such arrays for sake of tailoring wave focusing. This research explores a reconfigurable acoustic array inspired from a regular Miura-ori unit cell and threefold-symmetric Bricard linkage. The system focuses on acoustic waves and has single-degree-of-freedom motion when incorporated with a modified threefold-symmetric Bricard linkage. Three configurations of the array are analyzed where array facets that converge towards the center axis are considered to vibrate like baffled pistons and generate acoustic waves into the surrounding fluid. An analytical model is constructed to explore the near-field acoustic focusing behavior of the proposed acoustic array. The wave focusing capabilities of the array are verified through proof-of-principle experiments. The results show that the wave focusing of the array is influenced by the geometric parameters of the facets and the relative distance of facets to the center axis, in agreement with simplified ray acoustics estimates. These findings underscore the fundamental relationship between focusing sound radiators and geometric acoustics principles. The results encourage broader exploration of acoustic array designs inspired from integrated single-degree-of-freedom linkages and origami structures for sake of straightforward array deployment and reconfiguration.