基于有限元分析的船用柴油机磁性补偿技术研究

Research on Magnetic Compensation Technology of Marine Diesel Engines Based on Finite Element Analysis

摘要:

为研究船用柴油机的磁性补偿问题，采用有限元仿真方法来指导消磁设计工作。在地磁环境下， 利用 Ansys Maxwell 软件建立某型柴油机的有限元仿真模型，计算了柴油机感应磁场的空间分布，并测量了柴油机的磁场，仿真结果与测量结果进行对比，其误差不大于 10%，在工程应用允许的范围之内。采用补偿线圈的方式对柴油机的磁场进行补偿，通过优化设置补偿电流，柴油机的磁场最大值从 336 nT 减小到 50 nT， 降低约 85%。

关键词:柴油机磁场;有限元分析;磁性补偿;补偿线圈

Abstract:

In order to study the magnetic compensation of marine diesel engines，finite element simulation is used for degaussing design. In geomagnetic environment，a finite element simulation model of a diesel engine is established using Ansys Maxwell software，the spatial distribution of the induced magnetic field is calculated，and the magnetic field is measured. The simulation results are compared with the measured results，and the error is no more than 10%，which is within permissible range of engineering application. Compensation coils are used to compensate the magnetic field of the diesel engine. By optimizing the setting of the compensation current，the maximum value of magnetic field of the diesel engine is reduced from 336nT to 50nT，reduced by about 85%.

Key words:diesel engine magnetic field;finite element analysis;magnetic compensation;compensation coil