海中平均声场的数值模拟Ⅰ

水声传播规律是海洋声学研究的基本课题.利用电子计算机进行声场的数值模拟是研究声传播规律的重要方法,数值模拟也是声场数值预报的基础,近年来得到了迅速发展.国外已提出了许多种声场数值模拟方法[1-6],各种方法有不同的适用范围.

NUMERICAL SIMULATION OF AVERAGED SOUND FIELD IN THE SEA I

For layered ocean models,a new method of numerical simulation is presented on the basis of the theory of smooth-averaged sound field.By this method the averaged sound field in layered ocean can be calculated easier and faster.The IFP (Image Field Program)and SFP (Smooth-average Field Program) used for calculating the sound intensities at short and long ranges,respectively,are developed.At intermediate ranges,both IFP and SFP may be used,and the sound intensities calculated by IFP and SFP are well coiacident.The above-mentioaed method may be utilized for more extensive types of velocity-profile and boundary-reflection-loss,and used for predicting sound field.