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湍流边界层激励下平板辐射噪声数值计算方法

李祖荟 陈美霞

李祖荟, 陈美霞. 湍流边界层激励下平板辐射噪声数值计算方法[J]. 中国舰船研究, 2017, 12(4): 76-82. doi: 10.3969/j.issn.1673-3185.2017.04.012
引用本文: 李祖荟, 陈美霞. 湍流边界层激励下平板辐射噪声数值计算方法[J]. 中国舰船研究, 2017, 12(4): 76-82. doi: 10.3969/j.issn.1673-3185.2017.04.012
LI Zuhui, CHEN Meixia. Numerical method for calculating sound radiation characteristics of plate structure excited by turbulent boundary layer[J]. Chinese Journal of Ship Research, 2017, 12(4): 76-82. doi: 10.3969/j.issn.1673-3185.2017.04.012
Citation: LI Zuhui, CHEN Meixia. Numerical method for calculating sound radiation characteristics of plate structure excited by turbulent boundary layer[J]. Chinese Journal of Ship Research, 2017, 12(4): 76-82. doi: 10.3969/j.issn.1673-3185.2017.04.012

湍流边界层激励下平板辐射噪声数值计算方法

doi: 10.3969/j.issn.1673-3185.2017.04.012
详细信息
    作者简介:

    李祖荟, 男, 1992年生, 硕士生。研究方向:结构振动与噪声。E-mail:lizuhui925@163.com

    通信作者:

    陈美霞(通信作者), 女, 1975年生, 博士, 副教授。研究方向:结构振动与噪声。E-mail:chenmx26@163.com

  • 中图分类号: U661.44

Numerical method for calculating sound radiation characteristics of plate structure excited by turbulent boundary layer

知识共享许可协议
湍流边界层激励下平板辐射噪声数值计算方法李祖荟,等创作,采用知识共享署名4.0国际许可协议进行许可。
  • 摘要:   目的  湍流边界层(TBL)激励下的结构辐射噪声(也称“流激噪声”)是水下航行体的重要噪声源,因此,对流激噪声数值计算方法的研究具有重要意义。  方法  基于LMS Virtual Lab数值计算软件,以Corcos湍流脉动压力频率波数模型作为输入,采用主成分分析(PCA)法和振动—声传递向量(VATV)法计算湍流边界层激励下平板结构的流激噪声,并对两种方法的正确性进行验证,比较分析两种方法的计算时间及得到的声压自功率谱密度(ASD)曲线。  结果  结果表明,这两种方法均可有效计算湍流边界层激励下的结构流激噪声,且计算结果基本一致;和PCA法相比,VATV法所占用的计算资源更少,能快速预报结构的流激噪声;相较于VATV法,PCA法还可以得到结构振动响应结果。  结论  该研究结果对水下结构流激噪声快速预报具有一定的参考价值。
  • 图  1  计算模型网格划分示意图

    Figure  1.  Schematic of mesh division for calculation model

    图  2  80 Hz单极子声源激励下VATV和振动响应云图对比

    Figure  2.  Contours comparison of VATV and the vibration response excited by monopole at 80 Hz

    图  3  150 Hz单极子声源激励下VATV和振动响应云图对比

    Figure  3.  Contours comparison of VATV and the vibration response excited by monopole at 150 Hz

    图  4  平板中心点处速度自功率谱密度

    Figure  4.  Plate velocity power auto-spectra density at the geometrical center of the plate

    图  5  主分量个数的影响分析

    Figure  5.  Effect of the number of principal components

    图  6  场点A声压自功率谱密度曲线

    Figure  6.  Pressure power auto-spectra density of field point A

    图  7  法向速度自功率谱密度响应云图

    Figure  7.  Contours of normal velocity pressure auto-spectra density

    图  8  模态云图

    Figure  8.  The contours of mode shapes

    表  1  计算参数

    Table  1.   Calculation parameters

    Parameter Value
    Length of plate a/m 1
    Width of plate b/m 1
    Thickness of plate h/m 0.01
    Density of solid ρs/(kg·m-3) 7 800
    Young's modulus of solid E/Pa 2.1×1011
    Poisson's ratio of solid υ 0.3
    Structural loss factor r 0.01
    Density of water ρf/(kg·m-3) 1 000
    Sound speed in water cf/(m·s-1) 1 500
    Free stream velocity U0/kn 6
    Boundary layer thickness δ/m 0.02
    下载: 导出CSV

    表  2  四边简支平板水中前六阶耦合模态

    Table  2.   The first six coupling modes of four edge simply-supported plate

    Order Frequency/Hz
    1 17.493
    2 54.979
    3 54.979
    4 97.483
    5 126.875
    6 127.501
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-03-31
  • 网络出版日期:  2017-07-27
  • 刊出日期:  2017-08-04

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