利用有限元方法建立了单层有限长圆柱壳的声-固耦合模型，并通过数值模拟研究了其振动及声辐射特性。针对水下和水面2种工况下的圆柱壳，系统分析了其在不同波幅、波长及相位变化的规则波作用下的振动与声学特性。研究结果表明，自由液面形状对圆柱壳的振动-声辐射有显著影响，且这种影响随着频率升高而增强，特别是在中高频段的影响尤为明显。同时，相比于水下全浸没状态下的圆柱壳，自由液面形状对水面半潜圆柱壳的振动声学特性影响更为显著。本文研究对考虑自由液面对舰船振动声辐射特性的影响有一定的参考价值。
Employing the finite element method, a coupled acoustic-structure model was established for a single-layered finite-length cylindrical shell, and its vibration and sound radiation characteristics were studied through numerical simulations. For both submerged and surface-mounted cylindrical shells, a systematic analysis was conducted to examine their vibration and acoustic properties under the influence of regular waves with varying amplitudes, wavelengths, and phases. The research findings revealed that the shape of the free surface has a significant impact on the distribution of vibration modes and sound radiation patterns in cylindrical shells, with this influence increasing as the frequency rises, being particularly pronounced in the mid to high-frequency range. Furthermore, it was found that the effect of the free surface is more substantial on the vibro-acoustic characteristics of semi-submerged cylindrical shells at the waterline compared to fully submerged ones. This study provides a valuable reference for considering the influence of free surface on the vibration and acoustic radiation characteristics of ships.
2024,46(22): 8-16 收稿日期：2024-1-29
DOI：10.3404/j.issn.1672-7649.2024.22.002
分类号：U661.44
作者简介：张雯(1997-),女,硕士研究生,研究方向为水下结构物振动声辐射
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