Flank array is a sonar array mounted on the flank of underwater vehicle. Flank array utilizes the longer size of the vehicle to enlarge the array aperture, decrease the working frequency and improve the detection performance. Flank array is directly mounted on the flank shell of underwater vehicle, shell vibration is a main noise source for the flank array. It is shown from experiment that the vibration noise of flank array is mainly consist of high wavenmuber noise. The peak of the wavenumber spectrum of vibration noise is centered on flexural wavenumber. To provide model support for vibration noise abatement, flank array vibration noise model is constructed based on experiment results.%舷侧阵是一种安装在水下航行器两舷的声呐基阵.舷侧阵充分利用载体尺度以增大基阵孔径,降低基阵的工作频率,提高基阵的探测性能.舷侧阵直接安装在水下航行器壳体上,振动噪声是其主要的噪声干扰,有效抑制振动噪声是提高舷侧阵探测能力的基础.本文通过实验研究,验证了舷侧阵振动噪声的能量主要集中在高波数区,其峰值位于壳体弯曲波数.在此基础上,建立了舷侧阵振动噪声波数频率谱模型,为舷侧阵振动噪声抑制方法研究提供了模型支持.
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