吸音技术的进步:探索用 3D 打印技术开发基于四开十面体单元的声学超材料

Saliq Shamim Shah, Daljeet Singh, Jaswinder Singh Saini, Naveen Garg
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引用次数: 0

摘要

目的 本文旨在研究一种基于三维打印四开十面体单元的声学超材料的设计和特性。目前,缓解低频噪声需要利用对空间要求较高的材料来吸声。这些材料缺乏有针对性的频率控制调节能力。因此,需要一种能利用轻质耐用材料有效管理低频噪声的方法。设计/方法/途径在 SolidWorks 中创建了 CAD 模型,并使用数字光处理(DLP)3D 打印技术进行了制造。实验研究和数值模拟检验了超材料的吸声性能。使用带有两个麦克风的阻抗管来确定超材料的吸声系数。结果声学样品的测试凸显了几何参数对声学性能的影响。支杆长度增加 0.4 毫米,响应频率降低 500 赫兹。当支柱直径从 0.6 毫米增加到 1.0 毫米时,峰值吸收率从 0.461 上升到 0.690。将单元数从 8 个增加到 20 个可提高吸收系数并降低响应频率。研究人员对基于四开十面体单元的声学超材料的几何参数对吸声系数的影响进行了新颖的研究,这似乎是文献中所缺乏的。
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Sound absorption advancements: exploring 3D printing in the development of tetrakaidecahedron cell-based acoustic metamaterials
Purpose This paper aims to study the design and characterization of a 3D printed tetrakaidecahedron cell-based acoustic metamaterial. At present, the mitigation of low-frequency noise involves the utilization of spatially demanding materials for the absorption of sound. These materials lack the ability for targeted frequency control adjustments. Hence, there is a requirement for an approach that can effectively manage low-frequency noise using lightweight and durable materials. Design/methodology/approach The CAD model was created in SolidWorks and was manufactured using the Digital Light Processing (DLP) 3D printing technique. Experimental study and numerical simulations examined the metamaterial’s acoustic absorption. An impedance tube with two microphones was used to determine the absorption coefficient of the metamaterial. The simulations were run in a thermoviscous module. Findings The testing of acoustic samples highlighted the effects of geometric parameters on acoustic performance. Increment of the strut length by 0.4 mm led to a shift in response to a lower frequency by 500 Hz. Peak absorption rose from 0.461 to 0.690 as the strut diameter was increased from 0.6 to 1.0 mm. Increasing the number of cells from 8 to 20 increased the absorption coefficient and lowered the response frequency. Originality/value DLP 3D printing technique was used to successfully manufacture tetrakaidecahedron-based acoustic metamaterial samples. A novel study on the effects of geometric parameters of tetrakaidecahedron cell-based acoustic metamaterial on the acoustic absorption coefficient was conducted, which seemed to be missing in the literature.
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