Insights into acoustic properties of seven selected triply periodic minimal surfaces-based structures: A numerical study

IF 2.8 4区 工程技术 Q1 ACOUSTICS
Jin-You Lu, Tarcisio Silva, F. Alzaabi, Rashid K. Abu Al-Rub, Dong-Wook Lee
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引用次数: 0

Abstract

Poly(methyl methacrylate)-based triply periodic minimal surfaces (TPMS) structures promise great potential in phononic applications, but the complicated TPMS structure induces a design challenge for controlling their properties. Numerical acoustic simulations of seven major PMMA-based TPMS lattice structures are presented for low-frequency sound attenuation applications while varying their relative density. Except for the local resonances in primitive and Neovius-based lattice structures, the acoustic properties of other TPMS structures show a common Bragg bandgap with a central frequency of around 435 Hz and a bandwidth of around 286 Hz, which results from multiple scattering of periodic unit cells. In contrast, the acoustic bandgaps of primitive and Neovius-based lattices have much smaller and larger complete bandgaps, respectively, which are mainly attributed to the local resonances in their geometric cavities with different sizes. Thus, by taking the mechanism of generated bandgaps in the TPMS-based lattice structures into consideration, we can design suitable bandgaps for acoustic applications in the specific frequency range.
七个选定的三周期最小表面结构的声学特性:数值研究
基于聚甲基丙烯酸甲酯的三周期最小表面(TPMS)结构在声子学应用中具有巨大的潜力,但复杂的TPMS结构给控制其性能带来了设计挑战。在不同相对密度的情况下,对七种主要的pmma基TPMS晶格结构进行了低频声衰减的数值模拟。除了原始晶格结构和neovius基晶格结构的局部共振外,其他TPMS结构的声学特性都表现出共同的Bragg带隙,其中心频率约为435 Hz,带宽约为286 Hz,这是由周期单元胞的多次散射造成的。相比之下,原始晶格和neovius晶格的完整带隙分别要小得多和大得多,这主要是由于其几何腔中不同尺寸的局部共振。因此,通过考虑基于tpms的晶格结构中产生带隙的机制,我们可以在特定频率范围内设计适合声学应用的带隙。
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来源期刊
CiteScore
4.90
自引率
4.30%
发文量
98
审稿时长
15 weeks
期刊介绍: Journal of Low Frequency Noise, Vibration & Active Control is a peer-reviewed, open access journal, bringing together material which otherwise would be scattered. The journal is the cornerstone of the creation of a unified corpus of knowledge on the subject.
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