浅海环境下海洋锋对低频声能量传播特性的影响  

Influence of Ocean Front on Low-frequency Acoustic Energy Propagation in Shallow Sea

作　　者：王其乐 祝捍皓 柴志刚 崔智强 薛洋洋 WANG Qile;ZHU Hanhao;CHAI Zhigang;CUI Zhiqiang;XUE Yangyang(Institute of Marine Science and Technology,Zhejiang Ocean University,Zhoushan 316022,China;School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan 316022,China)

机构地区：[1]浙江海洋大学海洋科学与技术学院,舟山316022 [2]浙江海洋大学船舶与海运学院,舟山316022

出　　处：《海洋信息技术与应用》2022年第2期1-7,共7页JOURNAL OF MARINE INFORMATION TECHNOLOGY AND APPLICATION

基　　金：自然资源部海洋环境信息保障技术重点实验室2021年度开放基金课题;浙江省教育厅项目(Y202147766)。

摘　　要：为全面阐述浅海环境的海洋锋对低频声信号传播特性的影响,本文利用有限元方法,首先建立了点声源作用下浅海全波导声场的数值计算模型,其次利用该模型仿真分析了海洋锋性质、梯度变化对低频声信号在浅海全波导中传播特性的影响规律。仿真结果表明,受海洋锋性质影响,在由暖水区向冷水区过渡的锋面海区,低频声信号能量会在锋面影响下向海底大量泄露;而在由冷水区向暖水区过渡的区域,更多的能量局限在海水层中传播。随着海洋锋梯度的下降,低频声信号在锋面海区向海底泄露的能量逐渐减少,主要泄露位置也向锋面后方移动。For the detailed introduction to the ocean front neritic environment influence on low-frequency acoustic signal propagation characteristics,this study set up a little bit of sound source under the action of shallow sea full waveguide numerical calculation model of sound field,using the finite element method.Then,the effects of ocean front properties and gradient changes on the propagation characteristics of low-frequency acoustic signals in shallow sea full waveguide are analyzed by using the model.The simulation results show that,under the influence of ocean front,the energy of the low-frequency acoustic signal will leak to the sea bottom under the influence of the front in the transition zone from wann water to cold water.In the transition zone from cold water to wann water,more energy is confined to the seawater layer.With the decrease of ocean front gradient,the leakage energy of low-frequency acoustic signals to the sea bottom in the area of ocean front gradually decreases,and the main leakage location also moves to the rear of the ocean front.

关 键 词：浅海 海洋锋 低频声 能量传播 

分 类 号：P714[天文地球—海洋科学]