本文提出一种用于低频宽带振动抑制的新型声子晶体刚架结构。其单胞由X型桁架和预变形桁架组成。研究发现，与传统的X型周期刚架结构相比，其打破了空间对称性，在能带折叠位置打开了能带折叠点，最终产生了2个新的带隙。色散结构的结果证明，其可以在更低的频率范围内产生更宽的带隙。分别利用谱元法（SEM）和有限元法（FEM）计算了振动透射率。随后，研究了不同几何参数对结构带隙的影响。 其中，预变形倾角α增大可进一步降低带隙频率并拓宽带宽，而杆件截面半径r增大则使带隙向高频移动。该设计为船舶工程中广泛应用的桁架结构提供了一种有效的低频宽带振动控制解决方案，具有重要的工程应用价值。
In this paper, a novel phononic crystal rigid frame structure for low frequency and broadband vibration suppression is proposed. Its unit cell consists of an X-typed and a pre-deformed truss. It is found that compared with the traditional X-typed periodic frame structure, it breaks the spatial symmetry, opens the band folding point at the band folding position, and finally produces two new band gaps. The calculation of band structures demonstrates that it can open the band gap in a wider and lower frequency range. The vibration transmittance is calculated using spectral element method (SEM) and finite element method (FEM), respectively. Subsequently, the influence of different geometric parameters on the structural bandgap is studied.
2026,48(7): 167-172 收稿日期：2025-6-4
DOI：10.3404/j.issn.1672-7649.2026.07.027
分类号：U663.9
基金项目：国家自然科学基金资助项目（12102031）
作者简介：李超然(1992-),男,博士,工程师,研究方向为船舶减振降噪
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