声学覆盖层被广泛应用于水下航行器降噪设计，但对其流激声辐射研究相对较少。本文首先利用非相关平面波合成湍流脉动压力，并结合振声有限元模块建立流激声辐射数值算法，以水下四边简支平板流激辐射噪声为例与解析解进行对比验证；然后以三维弹性理论解析解为基础，建立敷设声学覆盖层平板辐射噪声有限元模型。最后，探讨敷设声学覆盖层平板流激声辐射产生机理以及影响覆盖层降噪性能的关键参数，为水下结构声隐身提供技术支持。
Acoustic coat are widely used in the design of noise reduction for underwater vehicles, but relatively little research has been done on their flow-excited acoustic radiation. In this paper, we firstly use the uncorrelated plane wave to synthesize the turbulent pulsation pressure, and combine the finite element module to establish the numerical algorithm of the flow-excited acoustic radiation, and then use the underwater quadrilateral simply-supported flat plate flow-excited radiation noise as an example to compare and verify with the analytical solution, and then establish the finite element model of the noise radiation from the flat plate of the laying acoustic coat based on the analytical solution of the three-dimensional elastic theory, and finally discuss the mechanism of the flow-excited acoustic radiation from the flat plate of the laying acoustic coat. Finally, the key parameters affecting the noise reduction performance of the coat layer are discussed to provide technical support for the acoustic stealth of underwater structures.
2024,46(1): 63-67 收稿日期：2022-12-05
DOI：10.3404/j.issn.1672-7649.2024.01.011
分类号：O427;TB5
作者简介：胡昊灏(1983-),男,博士,高级工程师,研究方向为水下结构振动与噪声控制
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