浅海负跃层海底单参数模型研究
Research on the single parameter seabed model for underwater acoustics field prediction in thermocline shallow water

海底反射特性在浅海声传播中起着决定性的影响。用小掠射角下海底反射损失随掠射角变化率FdB构建单参数模型可很好地描述浅海海底特性。对单参数模型进行深入研究和改进,建立了在浅海负跃层条件下描述水下声场的海底单参数模型,并利用数值仿真和海上实验数据,对浅海负跃层海底单参数模型水下声场预报的正确性进行了验证。
The sound propagation in shallow water is dominated by the seabed reflection properties. The slope of bottom loss versus grazing angle FdB(dB/radian) was proposed as the single parameter to describe the characteristics of sea bottom. Accordingly, a single parameter seabed model was established. In this paper, further research on the single parameter seabed model is conducted. Through the improvement, this advanced single parameter model could be applied to predicting underwater acoustics field in thermocline condition. The improved model's applicability to underwater acoustics field prediction in thermocline shallow water is proved by numerical simulation and experimental data.