脉冲漏磁检测钢板缺陷漏磁场有限元分析  

The Finite Element Simulation of pulsed magnetic flux leakage techniques for plate defect

作　　者：朱明[1] 杨理践[1] 邢燕好[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,沈阳110870

出　　处：《中国电子商情（通信市场）》2010年第6期70-75,共6页

基　　金：国家自然基金仪表专项基金资助项目（60927004）

摘　　要：利用有限元法计算探头磁化器在钢板磁化时的磁矢势，对影响脉冲漏磁技术检测结果的因素：缺陷深度、激励频率等进行分析。依据现有的u型规格磁化器，建立了磁化器对钢板磁化时的有限元模型，采用场路耦合的方式，计算脉冲信号励磁下，钢板缺陷处漏磁场法向磁感应强度大小。在有限元分析中，研究U型磁化器在缺陷处产生的漏磁信号特征，影响漏磁场磁感应强度大小的因素：裂纹深度、激励信号频率等，给出了它们的关系曲线，为钢板缺陷脉冲漏磁检测提供理论指导。In order to research the influence result factors when the probe detect steel plate defect based on the pulsed magnetic flux leakage （PMFL） techniques, the finite element method is used to research the magnetizer of probe operating state. The factors include the flaw depth, the excitation frequency and so on. The finite element model was established for flaw defection in experimental condition. The simulation result give the characteristics of the pulsed magnetic flux leakage （PMFL） techniques. The relationship between the changes of defect depth and excitation signal frequency on the defect is given by curve form. The analysis result provides the theory instruction for the steel plate defect based on the pulsed magnetic flux leakage （PMFL） techniques.

关 键 词：脉冲漏磁检测 无损检测 有限元 数值模型 场路耦合 

分 类 号：TG115.28[金属学及工艺—物理冶金]