液态半无限海底下典型波导的Warping变换修正

Modified Warping transformation for typical waveguide with semi-infinite seabed

针对Warping变换在非理想波导中的变换效果受海洋环境影响的问题,在传统的Warping变换的基础上,对非理想波导下的Warping变换公式进行修正,使修正后的Warping变换更适用于非理想波导下宽带脉冲声压信号的简正波分离和提取。本文给出了基于海底相移参数P的适用于具有均匀半无限海底的非理想波导的Warping变换修正公式。修正因子只与海底相移参数、海深、海水中平均声速等海洋环境参数有关,与其他海底参数无关,减少了Warping变换的修正难度。与已有的Warping变换修正公式相比,本文提出的对Warping变换的修正方法,所需的环境参数少,在实际应用中计算简单、应用方便,更具有实际应用意义。数值仿真和海上实验数据处理结果证明了该方法的有效性。

The application of traditional Warping transformation for non-ideal waveguide with semi-infinite seabed is not very efficient because of the effects of the marine environment.The traditional Warping operator is based on the ideal waveguide,and since the processing results are affected by environmental parameters,it is essential to modify the traditional Warping transformation for a non-ideal waveguide.A modified Warping transformation algorithm applied to a non-ideal waveguide with uniform semi-infinite bottom is presented in this paper,which is based on the bottom reflection phase shift P.The modified operator is related to P,water depth,and the average speed of sound in seawater.It is not very sensitive to other environmental parameters;thus,the modification procedure is simplified.Compared with the existing modified Warping transformation algorithm,the modified algorithm presented in this paper has some advantages:less environment parameters,easier processing procedure,and high application potential.The effectiveness and accuracy of the method are proven by the numerical simulation results and sea experimental data processing.