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。
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.
关键词
流激噪声 /
非相关平面波 /
有限元 /
快速预报
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Key words
flow-induced noise /
uncorrelated plane wave /
finite element method /
fast prediction
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参考文献
[1]汤渭霖, 俞孟萨, 王斌. 水动力噪声理论[M]. 北京：科学出版社,2019.
TANG Wei-lin, YU Meng-sa, WANG Bin. Hydrodynamic noise theory[M]. Beijing: Science Press,2019.
[2]孙铁志, 谢勃汉, 苗天丞,等. 流激格栅孔腔自噪声特性数值计算研究[J]. 振动与冲击,2020, 41(20):235-243.
SUN Tie-zhi, XIE Bo-han, MIAO Tian-cheng, et al. Numerical study on self-noise characteristics of a flow-induced grid cavity[J]. Journal of Vibration and Shock,2020,41(20):235-243.
[3]张石宸, 王春江, 孙向东,等. 细长圆柱构件表面扰流降噪机理的研究[J]. 振动与冲击,2022, 41(10):170-176.
ZHANG Shi-chen, WANG Chun-jiang, SUN Xiang-dong, et al. Noise reduction mechanism of the surface vortex[J]. Journal of Vibration and Shock,2022,41(10):170-176.
[4]Graham W R. Boundary layer induced noise in aircraft, Part 1:The flat plate model[J]. Journal of Sound and Vibration,1996,192(1):101-120.
[5]Chevelier F, Audoly C. Turbulent Flow-Induced Self Noise and Radiated Noise in Naval Systems—An Industry Point of View[C]// Ciappi E, Guyader J L, Rosa S D,et al. Flinovia - Flow Induced Noise and Vibration Issues and Aspects. Switzerland:Springer International Publishing,2015. 211-225.
[6]吕世金, 高岩, 刘进,等. 水下航行体表面湍流脉动压力波数−频率谱测试应用分析[J]. 中国舰船研究，2020， 15(S1):55-60.
LV Shi-jin, GAO Yan, LIU Jin, et al. Application analysis on the wavenumber-frequency spectrum of pressure excited by a turbulent boundary layer on the wall of an underwater test vehicle[J]. Chinese Journal of Ship Research,2020,15(S1):55-60.
[7]Maxit L, Berton L, Audoly C.et all. Discussion About Different Methods for Introducing the Turbulent Boundary Layer Excitation in Vibroacoustic Models C]// Ciappi E, Guyader J L, Rosa S D,et al. Flinovia - Flow Induced Noise and Vibration Issues and Aspects. Switzerland:Springer International Publishing,2015. 249-278.
[8]Aucejo M, Maxit L, Guyader J L. Experimental simulation of turbulent boundary layer induced vibrations by using a synthetic array[J]. Journal of Sound and Vibration,2012,331(16):3824-3843.
[9]Hong C,Shin K K. Modeling of wall pressure fluctuations for finite element structural analysis[J]. Journal of Sound and Vibration,2010,329(16):1673-1685.
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