摘要
本文从极低频电磁波的TE和TM模式传播公式出发,利用有限元数值算法,通过构建海水及海底介质模型,研究海水中极低频的衰减特性,最终认为TE和TM模式下极低频电磁波衰减曲线基本一致,频率为0.5 Hz时,磁场衰减速度明显快于电场。
In this paper, starting from the TE and TM mode propagation formulas of extremely low frequency electromagnetic waves, by using finite element numerical algorithm, the attenuation characteristics of extremely low frequencies in seawater are studied by constructing seawater and submarine medium models. Finally, it is considered that the attenuation curves of extremely low frequency electromagnetic waves in TE and TM modes are basically the same. When the frequency is 0.5 Hz, the attenuation speed of the magnetic field is significantly faster than that of the electric field.
作者
屈文璋
许诚
孙溥
李丁山
闫建峰
QU Wen-zhang;XU Cheng;SUN Pu;LI Ding-shan;YAN Jian-feng(China Ship Research and Development Academy,Beijing 100192,China)
出处
《舰船科学技术》
北大核心
2023年第4期139-142,共4页
Ship Science and Technology
关键词
极低频电磁波
极化模式
有限元
extremely low frequency(ELF)electromagnetic wave
polarization mode
finite element
