一种舰船轴频电场信号源强度计算方法  

A Ship Shaft-rate Electric Field Source Strength Calculation Method

作　　者：李国栋 姜润翔 孙兆龙 刘琪 LI Guodong;JIANG Runxiang;SUN Zhaolong;LIU Qi(College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电气工程学院,湖北武汉430033

出　　处：《探测与控制学报》2022年第4期28-34,共7页Journal of Detection & Control

摘　　要：为了有效计算不同谐波频率轴频电场信号的等效源强度,在对轴频电场、轴电流特性分析的基础上,结合“空气海水海床”三层介质中点电荷模型的计算公式,反演出轴频电场包络信号的等效源强度,再根据水下电场谐波信号的幅值和相位反推出各个谐波对应的源强度。利用不同阴极保护状态下的缩比船模试验数据对所提方法的有效性进行检验,试验结果表明,所提方法能够较好地实现对谐波信号源强度的准确计算,0.7倍船宽深度向1.0倍、1.5倍船宽深度换算时,谐波信号的频谱相对误差小于12%。In order to effectively calculate the equivalent source strength of the shaft-frequency electric field signals with different harmonic frequencies,based on the analysis of the characteristics of the shaft-frequency electric field and the shaft-current,and in the combination with the calculation formula of the point charge model in the three-layer medium of“air-seawater-seabed”,the equivalent source intensities of the shaft-frequency electric field envelopment signal were derived in reverse firstly,then,the corresponding source intensities of each harmonic signal were derived in reverse according to the amplitude and phase of the underwater electric field harmonic signal.Finally,the validity of the proposed method was verified by using the experimental data of the ship model under different cathodic protection conditions.The experimental results showed that the proposed method could accurately calculate the intensity of the harmonic signal source,and the spectrum relative error of harmonic signal was less than 12%when 0.7 times ship width depth was converted to 1.0 and 1.5 times ship width depth.

关 键 词：舰船 轴频电场 谐波信号 点电荷 反演 

分 类 号：U674.70[交通运输工程—船舶及航道工程] TP274.2[交通运输工程—船舶与海洋工程]