【摘要】 铁磁材料内部磁场分布的计算是漏磁法无损检测的基本问题之一。首先利用磁荷理论计算漏磁通无损检测中常用的 U形永磁体的磁场分布 ,利用尝试函数的方法建立了非均匀磁化条件下磁导率μ- H关系的数学模型 ,并与实验结果进行了比较 ,理论与实验结果符合得非常好 ,最后给出了材料内部的磁场分布的数学表达式。更多还原

【Abstract】 The calculation of the magnetic field distribution in ferromagnetic materials is one of the fundamental problems in magnetic leakage flux NDT. Firstly, the distribution of magnetic field of U shaped magnet was calculated with magnetic charge method; Secondly, with method of trial function, the dependence of μ on H was built and compared with experimental results. It was showed that the function of μ H could properly describe the dependence of μ on H ; Finally, the function of the magnetic field distribution in ferromagnetic materials was given.更多还原