基于BDRM理论的深海声场快速预报研究  

Fast prediction of deep ocean sound field based on BDRM theory

作　　者：张林[1] 笪良龙[1] 卢晓亭[1] 

机构地区：[1]海军潜艇学院海军战术水声数据中心,青岛266071

出　　处：《应用声学》2007年第4期239-243,共5页Journal of Applied Acoustics

基　　金：国防预研项目(51303020401-01);新世纪优秀人才支持计划NCET

摘　　要：深海存在深海声道和双轴声道两种典型环境,WKBZ简正波方法已实现了深海声道中声场的快速准确预报,而对于双轴海洋声道则存在一定的误差。本文在WKBZ本征函数的基础上,推导出了参考界面相位修正的一致表达式,并将浅海声传播的波束位移射线简正波(BDRM)理论应用于计算双轴海洋声道中的声场,进行了数值模拟并与传统简正波方法进行比较,结果表明应用BDRM理论计算的传播损失具有很高的精度和速度．The SOFAR channel and the two-axis underwater channel are typical environment in the deep ocean. The sound field of the SOFAR channel have been predicted by the WKBZ mode approach accurately and efficiently, while the predicted results of the two-axis underwater channel are not accurate. In this paper, on the basis of the WKBZ eigenfunction, an expression of the upper boundary reflection coefficient is proposed, and the beam-displacement ray-mode （BDRM） theory is applied to calculate the sound field of the two-axis underwater channel. Numerical simulations show that application of the BDRM theory is effective.

关 键 词：BDRM理论 深海声场 传播损失 

分 类 号：O422.2[理学—声学]