针对船舶低频噪声控制问题，基于局域共振隔声理论，采用声学有限元方法，开展薄膜型声子晶体低频隔声特性研究，探究声子晶体构型对其隔声性能的影响，明确声子晶体正方形构型方案，基于明确的构型方案分析腔体厚度、薄膜数量以及薄膜厚度结构参数等对隔声性能的影响。研究表明，薄膜声子晶体隔声峰值频率随配重质量的增加而降低，双侧薄膜声子晶体低频隔声性能优于单侧薄膜方案，增加腔体和薄膜厚度均可提高声子晶体的隔声性能。
Aiming at the problem of ship low-frequency noise control, based on local resonance sound insulation theory, the low-frequency sound insulation characteristics of membrane-type phononic crystals are studied by the acoustic finite element method. The influence of phononic crystal configuration on its sound insulation performance is explored, and the square configuration scheme of phononic crystal is clarified. Based on this configuration scheme, the influence of structural parameters such as cavity thickness, number of membranes, and membrane thickness on sound insulation performance is analyzed. The research shows that the peak sound insulation frequency of membrane-type phononic crystals decreases with the increase of the counterweight mass. The low-frequency sound insulation performance of the bilateral membrane phononic crystals is better than that of the single-sided arrangement. In addition, increasing the thickness of the cavity and the membrane can effectively improve the sound insulation effect of phononic crystals.
2022,44(21): 25-29 收稿日期：2022-06-06
DOI：10.3404/j.issn.1672-7649.2022.21.006
分类号：U661.43
基金项目：国家自然科学基金资助项目 （U2006229）
作者简介：杨坤(1986-),男,博士,工程师,研究方向为舰船总体技术
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