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根据实测舰船的尾流气泡分布模型,利用米氏理论计算得到尾流气泡层的散射相位函数,并将其应用于尾流气泡层后向散射光接收信号的Monte Carlo仿真分析中,以便为实际海况下的舰船尾流气泡层后向散射光探测的实验设置与信号预测、分析提供可靠的依据。通过对不同距离处尾流气泡层的散射相位函数及后向散射光接收信号特性的分析,可以得出:尾流中气泡层散射相位函数的变化不明显,且对接收信号的影响较小;气泡数密度的变化导致的多次散射效应和气泡层衰减系数的变化是引起后向散射光强度变化的主要原因,数密度越大,散射光信号中的多次散射光成分越大;当气泡层厚度达到一定倍数的衰减长度时,继续增加气泡层厚度对后向散射接收信号的影响较小。
According to the measured wake bubble distribution model of the ship, the scattering phase function of the wake bubble layer was calculated by Mie theory and applied to the Monte Carlo simulation of the backscattered light receiving signal of the wake bubble layer. The experimental setup and signal prediction and analysis of the wake-backscattering light detection of the wake of the ship under actual sea conditions provide a reliable basis. By analyzing the scattering phase function of the wake bubble layer at different distances and the characteristics of the received signal characteristics of the backscattered light, it can be concluded that the change of the phase function of the bubble layer scattering in the wake is not obvious, and the influence on the received signal is small. The multiple scattering effect caused by the change of the number density of bubbles and the change of the attenuation coefficient of the bubble layer are the main causes of the variation of the backscattered light intensity. The larger the number density is, the larger the multiple scattered light components in the scattered light signal are. When the layer thickness reaches a certain multiple of the attenuation length, the effect of increasing the thickness of the bubble layer on the received signal of the backscatter is small.