使用有限元方法建立不同吃水及压载下的有限长双层圆柱壳振动声辐射模型。考虑重力与浮力平衡，将压载分为固定压载以及压载水两部分，计算了圆柱壳结构的均方振速级、声功率级以及远场声压级指向性，揭示吃水及压载等因素对其声振特性的影响规律。研究结果表明，在低频段吃水对于圆柱壳的振动及声功率的影响较大，在高频段时对振动无明显影响，但声功率随着吃水的增大而增大；压载及环形流体有助于高频段的减振降噪，压载的分布对结构的声振特性有较大影响。
A vibration and acoustic radiation model for finite-length double-walled cylindrical shells under different draft and ballast conditions is established using the finite element method. Considering the balance between gravity and buoyancy, the ballast is divided into fixed ballast and ballast water parts. The mean square vibration level, sound power level, and far-field sound pressure directivity of the double-walled cylindrical shell structure are calculated, revealing the influence of draft and ballast on its acoustic and vibration characteristics. Research results indicate that, in the low-frequency range, the draft significantly influences the vibration characteristics and sound power of the cylindrical shell. At high frequencies, there is no apparent effect on vibration due to the draft. However, the sound power increases with an increase in draft. Ballast and annular fluid contribute to vibration reduction and noise reduction in the high-frequency range, and the distribution of ballast has a significant impact on the structural acoustic and vibration characteristics.
2024,46(23): 49-56 收稿日期：2024-1-22
DOI：10.3404/j.issn.1672-7649.2024.23.008
分类号：U661.44
作者简介：徐尧(1996-),男,硕士研究生,研究方向为水下结构物振动声辐射
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