基于船型与区域等级的舰船轴频电场计算

Calculation of Vessel’s Shaft-Rate Frequency Electric Field Based on Ship Type and Regional Grade

在利用等效点电荷对舰船轴频电场换算时,存在着因等效源位置不够合理而造成误差较大的问题。通过目标船的船型系数与尺度比来确定等效源在各个方向上的布置位置和间距,并根据结构布置特点对目标船的各部分进行分区和分级,确定区域等级权值。有针对性地在各区域内调整等效源布置,提出基于船型与区域等级的等效源位置确定方法,并引入粒子群算法对计算模型进行优化。利用模型实验对所述方法的有效性进行检验,结果表明,基于船型与区域等级的等效源位置确定方法能够较精确地实现对轴频电场信号包络的模拟计算,经粒子群算法优化后误差进一步下降,为轴频电场的预测与仿真计算提供了新的途径。

In the conversion of ship shaft-rate frequency electric field by equivalent point charge,there is a big error because the equivalent source location is not reasonable enough.Through the ship type coefficient and scale ratio of the target ship,the layout position and spacing of the equivalent source in each direction are determined.According to the structural layout characteristics,each part of the target ship is divided and graded,and the regional grade weight is determined.The equivalent source layout is adjusted in each region.A method for determining the location of the equivalent source based on the ship type and regional grade is proposed,and the particle swarm optimization algorithm is introduced to optimize the calculation model.The effectiveness of the method described in this paper is tested by model experiments.The results show that the equivalent source location determination method based on ship type and regional level can accurately realize the simulation calculation of the envelope of shaft-rate frequency electric field signal,and the error is further reduced after particle swarm optimization,which provides a new way for the prediction and simulation calculation of shaft-rate frequency electric field.