面向声学吸收材料的耐压、轻薄和多模式共振吸收等目标，设计不同尺寸口径的圆锥体阵列，通过软件建模、切片，采用热塑性TPU弹性体材料，通过3D打印机将声学阵列结构打印在一个圆饼体内，得到具有一定抗压支撑能力的声学材料的基本框架结构。在该框架结构的空腔内壁上，采用刷涂法施加涂层前体，通过光固化后形成有互穿网络结构的材料涂层，从而得到声学超材料。经测量具有700 Hz的低频吸收峰，并在中频区具有更高更宽的声学吸收，在4500 Hz处的吸收系数可达到0.99，还发现声学吸收随压强增加逐渐向高频移动。
In pursuit of novel acoustic metamaterials with better performances of pressure resistance, lightness and multi-mode resonance absorption, different sizes of horn arrays are designed through software modeling, slicing and printed using thermoplastic TPU elastomer material and a basic frame structure of acoustic material with certain compressive support capacity is obtained. Followed by coating with the precursor and photocuring, the acoustic metamaterial with IPN is obtained and found to have a low frequency absorption peak of 700 Hz and a wider acoustic absorption in the middle frequency region with the absorption coefficient as high as 0.99 at 4500 Hz. And furthermore, the acoustic absorption moves to high frequency with the increase of pressure.
2022,44(17): 56-59 收稿日期：2021-05-14
DOI：10.3404/j.issn.1672-7649.2022.17.011
分类号：TB535
作者简介：刘允航(1977-)，男，硕士，工程师，主要从事声学材料研究
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