利用 FEM-BMSBM 对海洋环境中结构振动引起的水下声辐射和传播进行数值研究

IF 4.3 2区 工程技术 Q1 ENGINEERING, OCEAN
Qiang Xi , Zhuojia Fu , Mi-An Xue , Junpu Li , Elena Atroshchenko , Jinhai Zheng
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引用次数: 0

摘要

要了解海洋环境中由结构振动引起的水下声辐射和传播,就必须分析海洋声场与结构之间的相互作用。为此,本文提出了一种整合了有限元法(FEM)、奇异边界法(SBM)和 Burton-Miller (BM) 技术的新型混合方案。本文介绍了混合方案的三维和轴对称计算公式。通过利用各自的优势,有限元法模拟结构自由振动,奇异边界法分析各种海洋环境中的水下声学,BM 技术解决不规则频率问题。通过与实验和其他数值结果的比较,证实了 FEM-BMSBM 混合方法的准确性和可行性。数值结果表明,混合有限元-BMSBM 降低了传统有限元的高计算成本和波叠加法(WSM)的假定问题,并成功缓解了各种海洋环境中水下声学模拟的不规则频率现象。此外,还研究了海洋表面和沉积物对水下声场的影响。数值研究表明,海洋表面和沉积物的反射效应会引起水下声压级曲线的波动,声压级曲线的边叶数量会随着激励频率的增加而增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical study of underwater acoustic radiation and propagation induced by structural vibration in ocean environments using FEM-BMSBM
Understanding underwater acoustic radiation and propagation induced by structural vibration in the ocean environment involves analyzing the interaction between the ocean acoustic field and the structure. For this reason, this paper proposes a novel hybrid scheme integrating the finite element method (FEM), singular boundary method (SBM) and Burton-Miller (BM) technique. The three-dimensional and axisymmetric calculation formulations of the hybrid scheme are presented. By leveraging the respective strengths, the FEM simulates structural free vibrations, the SBM analyzes underwater acoustics in various ocean environments, and the BM technique resolves irregular frequency issues. The accuracy and feasibility of the hybrid FEM-BMSBM are confirmed by comparisons with experimental and other numerical results. The numerical findings demonstrate that the hybrid FEM-BMSBM alleviates the high computational cost of the traditional FEM and the ill-posed problem of the wave superposition method (WSM), and successfully mitigates irregular frequency phenomena of underwater acoustic simulations in various ocean environments. Additionally, the influence of the ocean surface and sediment on the underwater sound field is studied. Numerical study shows that the reflection effects of the ocean surface and sediment cause fluctuations in the underwater sound pressure level curve, and the number of side lobes of the sound pressure level curve increases with the increase of the excitation frequency.
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来源期刊
Applied Ocean Research
Applied Ocean Research 地学-工程:大洋
CiteScore
8.70
自引率
7.00%
发文量
316
审稿时长
59 days
期刊介绍: The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.
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