CAJ | 학술논문

由于表面声道与深海声道间的耦合效应,声波在双轴海洋声道中的传播比较复杂,因此求解双轴海洋声道中的声场就比较困难.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,可以对双轴海洋声道内声传播问题进行分析和预报.
유우표면성도여심해성도간적우합효응,성파재쌍축해양성도중적전파비교복잡,인차구해쌍축해양성도중적성장취비교곤난.재 WKBZ 본정함수적기출상,추도출료삼고계면상위수정적일치표체식,병장천해성전파적파속위이사선간정파(BDRM)이론응용우계산쌍축해양성도중적성장,진행료수치모의병여전통간정파방법진행비교,결과표명응용 BDRM 이론계산적전파손실구유흔고적정도화속도,가이대쌍축해양성도내성전파문제진행분석화예보.
Two-axis underwater channel often exists in deep ocean. Because of the coupling between surface channel and SOFAR channel, sound propagation in the two-axis underwater channel is complex and so its calculations of acoustic fields are difficult. The beam-displacement ray-mode (BDRM) theory is a normal mode method for propagation modeling in the common horizontally stratified shallow water. We improve the theory, proposing a new method for computing the upper boundary reflection coefficient, and apply it to calculate the acoustic fields of two-axis underwater channel. Transmission losses in the two-axis underwater channel are calculated by the BDRM theory. The results are in good agreement with the KRAKEN code and the computational speed excels those of the other methods.