层化动力学环境内波感应电磁场特性研究  

Research on electromagnetic field characteristics induced by internal waves in layered dynamic environments

作　　者：刘健 吕自强 龚玉林 刘学锋 李明 魏宝君 LIU Jian;LYU Ziqiang;GONG Yulin;LIU Xuefeng;LI Ming;WEI Baojun(College of Science,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)理学院,山东青岛266580

出　　处：《实验技术与管理》2025年第1期133-142,共10页Experimental Technology and Management

基　　金：国家自然科学基金面上项目(12475135);中央高校基本科研业务费专项资金(22CX03017A);山东省本科教学改革研究重点项目(Z2023297);山东省研究生教育教学改革研究面上项目(SDYJSJGC2023012);中国石油大学(华东)教学改革重点项目(CZ2024016、CZ2022029)。

摘　　要：海洋内波运动产生的背景电磁噪声会严重干扰战场水下舰船探测和电磁通信的精度。为定量计算内波产生的感应电磁场,利用电磁信号的叠加性去除噪声信号,建立了多层简谐内波感应电磁场模型,给出了内波感应电磁场的计算方法,研究了其产生的感应电磁场的分布规律,分析内波波长和海水水文性质对感应电磁场的影响。结果表明:感应电磁场在内波密度分界面处达到极大值;内波波长影响内波的速度,从而使内波感应电磁场随波长呈正相关变化;内波上下层海水密度比、海水电导率、以及海水总深度对内波产生的感应电磁场均有影响,其中海水密度比对感应电磁场的影响占主导地位。文章提出了内波感应电磁场的计算方法,可为后续水下舰船探测及通信提供理论支持。[Objective]As the strategic importance of the ocean grows,underwater electromagnetic detection has garnered significant attention.Background electromagnetic noise from internal wave movements can severely disrupt the accuracy of underwater vessel detection and electromagnetic communication on the battlefield.This study aims to quantitatively calculate the induced electromagnetic field generated by internal waves and remove noise signals utilizing the superposition property of electromagnetic signals.[Methods]A multilayer internal wave-induced electromagnetic field model is constructed based on the internal wave motion equation and Maxwell’s equations governing electromagnetic field generation and propagation.A method for calculating this induced electromagnetic field is presented,and its characteristics,including the effects of internal wave wavelength and seawater hydrological properties,are thoroughly analyzed.[Results]The findings reveal that seawater’s hydrological and electromagnetic properties significantly influence the electromagnetic field.The field peaks at the density interface of internal waves and displays a periodic pattern horizontally,underscoring the interface’s role in determining electromagnetic field distribution and intensity.Additionally,longer internal wave wavelengths increase their velocity,leading to a greater magnitude of the induced electromagnetic field.This relationship provides insights into how varying internal wave scales can affect underwater detection and communication.The induced electromagnetic field also strengthens with higher density ratios and conductivity between seawater layers,while changes in seawater depth yield different trends in the lower layer’s electromagnetic field,highlighting the complex interactions between depth and electromagnetic properties.Notably,the density ratio is a key factor influencing the induced electromagnetic field.[Conclusions]This paper introduces a method for calculating the internal wave-induced electromagnetic field.By analyzing th

关 键 词：内波 感应电磁场 内波速度 多层内波模型 

分 类 号：O442[理学—电磁学]