高斯射线束方法在深海匹配场定位中的应用

The application of Gaussian beam method in deep ocean matched-field localization

匹配场定位作为一种水声被动定位方法,其拷贝场计算方法的精度和速度对定位效果和定位效率有着直接的影响。尤其在深海,目前浅海中常用的拷贝场计算方法如简正波法、抛物方程近似等在深海中往往存在计算效率不够、内存需求大、难以满足实际应用的需求。高斯射线束方法具有计算速度快,物理意义清晰,易于并行化处理等优点,非常适合于深海近程声场计算。通过数值仿真算例和海上实验数据的处理验证了高斯射线束方法用于拷贝场计算的有效性。仿真和实验数据处理结果表明,采用高斯射线束方法计算拷贝场在深海匹配场定位中有很好的定位效果.

In the underwater source localization of matched-field processing （MFP）, the accuracy and efficiency of the replica model for the field prediction is of the essence. Especially in deep ocean, those models usually used in shallow water can not have an satisfying efficiency. The ray theory based Gaussian beam method, with merits of high efficiency, clarity in physical meaning, and being easy to be paralleled, is proposed for sound field prediction. Simulations and experiment data processing are performed to validate this method. The results indicate that the application of Gaussian beam model as a replica model in deep water localization has high accuracy.