面向磁场有限元分析的舰船模块化几何建模技术研究

On vessel′s modular geometric modeling technology in FEM magnetic field analysis

运用模块化思想,完成了舰船结构模块和功能模块的划分,并通过对功能模块的变参,实现了自动生成船舶各个组成部件几何模型的建模系统。最后,以某舰几何模型为基础对该舰磁场分布进行有限元分析计算。结果表明,该方法计算精度较高,能够较好反映舰船空间磁场的分布。

In order to elevate the magnetic defense capability, the vessel＇s magnetic field intensity must be analyzed and calculated so as to provide the theoretical foundation for vessel degaussing. Based on the idea of modularization, the partition of vessel＇s structure modules and function modules was done with, and thus the geometric modeling system of creating component parts of ships was developed automatically by varying the parameters of function modules. Finally, the geometric model of one ship was used as an example to calculate and analyze its magnetic field intensity by means of FEM method. The results show that this modeling method which is credible, practical and accurate can be used to reflect the vessel magnetic field distribution in the air exactly and that it is of some value in the practical engineering.