摘要
根据方钢纵向磁化稳定状态下的磁荷分布规律 (磁荷均布于各条棱线 ) ,给出了方钢内任意点退磁场强度的解析表达式和某些典型空间分布曲线 ,它们与磁化初瞬间的对应曲线既有相似之处 ,也有不同特点。数值计算表明 ,这时方钢的退磁场既有负值 (传统意义的退磁场 ) ,也有正值(有效磁场大于磁化场 )和零值 (有效磁场与磁化场相等 )。
According to the distribution law of magnetic charges of a cuboid steel magnetized longitudinally in stable condition (magnetic charges distribute uniformly along all edges of the cuboid steel), the analytic expression for the demagnetizing field strength of an arbitrary point in the cuboid steel and some typical spatial distribution curves were given. Digital calculation showed that under the condition the demagnetizing field strength of a cuboid steel had not only negative value but also positive and zero ones.
出处
《无损检测》
2001年第3期108-110,共3页
Nondestructive Testing
基金
国家自然科学基金!资助项目 (5 95 710 6 4)
关键词
磁粉检验
磁场强度
纵向磁化
方钢
Magnetic particle testing
Magnetic field strength
Longitudinal magnetization
Cuboid steel
