摘要
铁磁物体感应磁场的数值计算研究在舰艇消磁等领域具有重要的应用价值.针对弱磁作用下铁磁物体感应磁场计算的问题,根据均匀磁化体的特点,建立了基于单元表面积分的铁磁物体感应磁场模型.为了解决工程中铁磁物体磁化率难以确定的困难,从弱磁作用下铁磁物体的磁化特点出发,利用磁场垂直分量测量值建立了以单元磁化率为未知量的数学模型,并运用寻优能力强、速度快、易于求解多维优化问题的微粒群算法对磁化率数学模型进行了优化求解,进而用单元表面磁场积分法解算了铁磁物体的感应磁场.通过钢板计算实例中磁场测量值和计算值的比较,表明该方法计算精度较高,能够较好地反映弱磁作用下铁磁物体的感应磁场分布,有一定工程实用价值.
It is very useful to have accurate induced magnetic field calculations for ferromagnetic objects when degaussing ships. The influence of induced magnetic fields in ferromagnetic objects in a weak magnetic field was studied for this paper. Based on the magnetization property of a uniformly magnetized body, a magnetic field model based on the element surface integral was developed. In order to remove difficulties in the calculation of the mag- netic susceptibility of ferromagnetic objects in engineering,, an optimization model of magnetic susceptibility based on measured magnetic fields was proposed. Then, the equivalent magnetic susceptibility of each element was solved with a particle swarm optimization method, based on this optimization model. Finally, calculations for a steel plate example showed that the method is effective in practical engineering.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2009年第1期91-95,共5页
Journal of Harbin Engineering University
基金
国家海洋专项基金资助项目(420050101)
关键词
感应磁场
表面积分
微粒群算法
舰船消磁
induced magnetic field
surface integral
particle swarm optimization
ship degaussing
