摘要
为计算磁路设计中永磁体几何参数对管道磁化效果的影响 ,采用了有限元方法研究管道磁化磁路中永磁体长度 ( 10～ 40 mm)、直径 ( 2 5～ 10 0 mm)改变时 ,管道表面缺陷( 0 .2 mm深 ,0 .2 m m宽 )产生的漏磁场的变化情况 ,得到了缺陷漏磁场水平分量 Bx 随永磁体长度、磁极面积改变时的变化规律。此规律有助于从整体上把握永磁体磁路设计 ,改善磁化效果 ,提高漏磁检测灵敏度 。
The influence of the geometric size of permanent magnets on pipeline magnetization in magnetic circuit design was analyzed using the finite element method. The flux leakage B x due to a pipeline defect (0.2mm depth, 0.2mm width) was calculated for various permanent magnet lengths (10~40mm) and diameters (25~100mm). Correlation curves are given for the magnetic flux leakage along with the length and polar area of magnet. The result can be used in magnetic circuit design for improving testing sensitivity and for providing a method for optimizing the magnetization design in magnetic flux leakage testing.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2000年第2期67-69,共3页
Journal of Tsinghua University(Science and Technology)
关键词
优化设计
管道磁化
有限元方法
漏磁检测
缺陷
pipeline magnetization
finite element method
permanent magnet NdFeB
magnetic flux leakage testing
