3D printing of fiber composite sandwich metamaterial with spiral resonators for attenuation of low-frequency structural vibration
3D printing of fiber composite sandwich metamaterial with spiral resonators for attenuation of low-frequency structural vibration
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DOI：
10.1016/j.compositesa.2023.107594
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
K. Mizukami;Yuhei Kumamoto
中科院分区：
文献类型：
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作者：
K. Mizukami;Yuhei Kumamoto
提出了一种具有低频带隙的刚性结构的纤维复合夹层超材料。所提出的结构是一种局部谐振的超材料，它抑制了螺旋谐振器的弹性波的传播。利用有限元法得到了该材料的色散曲线和刚度。数值分析结果表明，所提出的夹层结构不仅有助于提高比刚度，而且还加宽了带隙。从观察的带隙边界模式，分析模型的开发，以获得的下限和上限频率的带隙。通过3D打印制造的超材料样品显示出具有低振动传递率的频率范围，这与频率响应分析的结果一致。将该材料的比弯曲刚度和带隙中心频率与现有的板状材料进行了比较。
This paper proposes a fiber composite sandwich metamaterial as a stiff structure with a low-frequency band gap. The proposed structure is a locally resonant metamaterial that inhibits the propagation of elastic waves with spiral resonators. The dispersion curves and stiffness of the metamaterial were obtained using the finite element method. The numerical analysis results indicated that the proposed sandwich structure contributes not only to the improvement of the specific stiffness but also to the widening of the band gap. From observations of the band gap boundary modes, an analytical model was developed to derive the lower and upper bound frequencies of the band gap. A metamaterial sample manufactured by 3D printing exhibited a frequency range with low vibration transmissibility, which agreed with the results of the frequency response analysis. The specific bending stiffness and band gap center frequency of the proposed metamaterial were compared with those of existing plate-type metamaterials.