【摘要】 基于有限元方法,分析了2种聚磁结构(方形聚磁片和导向聚磁片)的裂纹漏磁场强度和密度随裂纹深度变化的影响,并给出了相关的对比分析曲线和实验验证.结果表明,磁化系统增加聚磁结构后,裂纹处测点的漏磁场强度和密度增强,增加聚磁结构后的信号幅值平均提高约20%,其中导向聚磁结构效果更好.更多还原

【Abstract】 By the finite element analysis method,this paper analyzes the effect of two different magnetism gathering structure on the density and intensity of crack MFL varying with crack depth.And their curves are given,validated by experiment.The outcome indicates that the magnetic system with magnetism gathering can build up the density and intensity of crack MFL on the measure point,and their breadth of signal can be enhanced by about 20%,which is advantageous to crack MFL testing and analysis.更多还原