摘要
在磁探测工作中,将潜艇壳体、武器弹药壳体等铁磁物体等效为空心薄壳铁磁圆柱体,对于分析它们的外部磁特征具有重要意义.采用三维积分方程法,建立了地磁场中空心铁磁圆柱体纵向磁化状态的数学模型,并按照不同的剖分格式进行了计算分析.一个典型实例的计算结果表明,三维积分方程法只需要少量剖分单元就可以很好地满足计算精度要求,大大减少了计算前的数据准备工作量.另外,根据磁感应强度求解问题,计算时间大大少于根据磁场强度求解问题,大幅度地加快了计算速度.三维积分方程法计算结果与实测结果具有很好的一致性,表明该计算方法是有效可行的,非常适合于计算空心薄壳铁磁圆柱体在地磁场中的纵向磁场特征.
In the magnetic detection, the ferromagnetic objects, such as the hull of submarine, the snell of ordnance, etc. , can be equivalent to the hollow ferromagnetic cylinders, which is significant for the analysis of their external magnetic signatures. Using the 3D integral equation method, the mathematical modeling of the hollow ferromagnetic cylinder＇s magnetic states in the geomagnetic field is established, and the calculations are performed on the different partition meshes. The calculation results of a typical example indicate that only a few of partition elements are required for the 3D integral equation method to satisfy the calculation precision,and thus the operation of data preparation is reduced greatly before the calculation. In addition, the calculation time based on the magnetic induction is lesser than that based on the magnetic field strength, thus accelerating the calculation speed. The calculation results of the 3D integral equation method accord with the measurement outcomes, which indicate the availability of the method, and that is suitable to calculate the longitudinal magnetic characteristics of the hollow thin cylinders with ferromagnetic materials in the geomagnetic fields.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2006年第6期886-890,共5页
Journal of Harbin Engineering University
关键词
感应磁场
空心圆柱体
三维积分方程法
数值模拟
induced magnetic field
hollow cylinder
3D integral equation method
numerical simulation
