常梯度声线跟踪中平均声速的改进算法

An Improved Method for Calculating Average Sound Speed in Constant Gradient Sound Ray Tracing Technology

在对多波束测深常用声线跟踪算法进行分析的基础上,提出了一种改进的声线跟踪算法,即沿声线传播的圆弧路径进行积分来求取层内的平均声速,进而推导了严密的多波束测深波束脚印位置的计算公式。理论推导表明,常用的声线跟踪算法的平均声速是将声线的圆弧传播路径当作对应弧段弦时的改进算法平均声速的近似解。实验表明,改进的声线跟踪算法比常用的声线跟踪算法更严密。

Based on the research and analysis on the current computational models of sound ray tracing,a set of more precise computational formula are derived.The basic principle of the method is that the average sound speed is calculated using the integral of the sound line arc infinitesimal,then a precise beam footprint position formula is obtained.The theoretical analysis shows that the average speed of the traditional ray tracing technology is the approximate solution of the improved sound ray tracing technology when the circular path of the sound ray is taken as chord of the arc.The experimental result shows that the improved sound ray tracing arithmetic is more precise and practical than the traditional sound ray tracing technology.