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A high precision modeling and calculation method of ship shaft frequency electromagnetic field based on electric dipole

机译:基于电偶极子船轴频率电磁场的高精度建模与计算方法

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Shaft-rate electromagnetic field is a kind of signal with obvious electromagnetic characteristics in the physical field of ships. Therefore, the study of shaft-rate electromagnetic field is of great significance to ship electromagnetic protection. Based on the Maxwell’s equations in the electromagnetic field theory and the two-layer media conditions of air and seawater as the background to derive the approximate analytical expressions of the electric and magnetic fields generated by horizontal time-harmonic electric dipoles and vertical time-harmonic electric dipoles in seawater. This paper used MATLAB to calculate the electric and magnetic field distribution in 10m and 50m seawater. Finally, a simple edge current model of two-layer dielectric was built in COMSOL without affecting the accuracy of the calculation. The comparative analysis results show that the derived formula can calculate the electric field and magnetic field at different depths in seawater. The analytical solution accuracy of the electric field intensity X and Y components of the horizontal electric dipole is higher, the analytical solution accuracy of the electric field intensity Z component and the three components of the magnetic flux density is higher. The calculation accuracy of different components using different analytical solutions can reach up to 96%.
机译:轴速电磁场是一种具有明显电磁特性的船舶的电磁特性。因此,对轴速电磁场的研究对船舶电磁保护具有重要意义。基于电磁场理论中的麦克斯韦方程和空气和海水的两层媒体条件作为衍射水平时间谐波电偶极电池和垂直时间谐波电气产生的电磁场的近似分析表达式。海水中的偶极子。本文采用MATLAB计算10M和50M海水中的电气和磁场分布。最后,在COMSOL中构建了两层电介质的简单边缘电流模型,而不会影响计算的准确性。比较分析结果表明,衍生公式可以在海水中计算不同深度的电场和磁场。水平电偶极子的电场强度X和Y组分的分析解精度较高,电场强度Z分的分析溶液精度和磁通密度的三个部件更高。使用不同分析液的不同组件的计算精度可达高达96%。

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