摘要
随着声呐基阵孔径的增大及探测频率的不断降低,声呐自噪声场特性研究需要由自功率谱空间分布特性扩展到空间互功率谱及相干特性。针对矩形腔和弹性矩形板透声窗组合的声呐腔结构,考虑弹性平板与内外声场的耦合作用,采用模态法建立了矩形板受湍流边界层脉动压力激励的腔内水动力噪声场空间互功率谱及空间相干性计算模型,计算分析了在不同频率和不同噪声场空间场点位置情况下的声呐腔水动力噪声场空间互功率谱和相干性特征,计算结果与实船声呐舱水动力噪声测试结果一致。
With the increase of the sonar array aperture and the continuous decrease of the detection frequency,the investigation on the characteristics of the sonar self-noise field needs to be extended from the spatial and distribution characteristics of the self-power spectrum to the spatial cross-power spectrum and coherence characteristics.For the sonar cavity structure composed of a rectangular cavity and an elastic rectangular plate acoustic window,considering the coupling effect of the elastic plate and the internal and external sound fields,the modal method is used to establish the spatial cross-power spectrum and spatial coherence of the noise field.The spatial cross-power spectrum and coherence characteristics of the sonar cavity noise field under different frequencies and different noise field spatial field points are calculated and analyzed.The calculation is consistent with the test results of the hydrodynamic noise of the real ship sonar cabin.
作者
吴登峰
俞孟萨
白振国
李东升
余晓丽
WU Dengfeng;YU Mengsa;BAI Zhengguo;LI Dongsheng;YU Xiaoli(National Key Laboratory on Ship Vibration&Noise,China Ship Scientific Research Center,Wuxi 214082,China)
出处
《中国造船》
EI
CSCD
北大核心
2023年第3期102-113,共12页
Shipbuilding of China
关键词
声呐腔
流激噪声场
互功率谱
空间相干性
sonar cavity
flow induced noise field
cross-power spectrum
spatial coherence
