水下平板流激声辐射快速预报方法研究

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摘要本文旨在提出一种计算流激噪声的数值预报方法，首先以非相关平面波叠加理论为基础合成湍流脉动压力谱，将随机问题转化为一组确定性问题，并结合有限元声振耦合模块计算流激结构振动声辐射。论文给出了该方法的详细流程，通过与流激平板解析解对比验证了算法的正确性。从波数滤波机理出发，给出了波数域截断的准则，并分析了波数分辨率、平面波组数、有限元网格密度等重点参数对计算精度的影响，最后通过对比计算时间指出本文算法较传统有限元法有明显优势。该算法为快速预报水下结构流激噪声提供技术支撑。

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	胡昊灏
	周石头
	赵傲
	蒋哲伦

关键词 ：流激噪声, 非相关平面波, 有限元, 快速预报

Abstract：In this paper, a numerical prediction method was proposed to calculate the flow induced noise. Firstly, the turbulent fluctuation pressure spectrum was synthesized based on the uncorrelated plane wave superposition theory, and the random problems were transformed into a set of deterministic problems. The paper proposes the detailed process of the method, and verifies the correctness of the algorithm by comparing with the analytical solution of the flow induced plate. Based on the wave number filtering mechanism, the truncation criterion of wave number domain is provided, and the influence of key parameters such as wave number resolution, plane wave group number and finite element mesh on the calculation accuracy was analyzed. Finally, by comparing the calculation time, it is pointed out that the proposed algorithm has obvious advantages over the traditional finite element method. This algorithm provides technical support for the fast prediction of the flow noise of underwater structures.

Key words： flow-induced noise uncorrelated plane wave finite element method fast prediction

收稿日期: 2022-10-21 出版日期: 2023-10-28

引用本文:

胡昊灏，周石头，赵傲，蒋哲伦. 水下平板流激声辐射快速预报方法研究[J]. 振动与冲击, 2023, 42(20): 124-129.
HU Haohao,ZHOU Shitou,ZHAO Ao, JIANG Zhelun . A study on a fast prediction method of flow induced acoustic radiation from an underwater plate. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(20): 124-129.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I20/124

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