Eddy Current Field in Uniform Medium Produced by a Coil
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摘要: 以半无限大平板导体为例,直接从麦克斯韦方程推导出涡流电流密度计算的积分公式。用MATLAB软件编程计算了空心线圈激发的涡流分布情况,为检测系统的参数设置提供了依据。结果显示,在一定的条件下,即使在构件内部数十倍的集肤深度,仍然有很强的涡流分布。Abstract: Taking the example of a half-infinite conducting plane, a formula for computing eddy current density is derived directly from Maxwells equation. By use of MATLAB, computing a distributing of eddy current which is inspired by a coil, that can be used as the parameter setup foundation. The results show that in depth of ten skin depth, the eddy current density is still high.
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Keywords:
- Eddy current testing /
- Skin depth /
- Coil /
- Eddy field
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[1] 周克定.工程电磁场数值计算理论方法及应用\[M\].北京:高等教育出版社,1994. [2] 蒋齐密,张新访,刘土光,等.电涡流检测系统中的电磁场仿真\[J\].计算机仿真,2000,17(5):36-39. [3] 陈德智,唐 磊,盛剑霓,等.无限大均匀平板导体中的涡流场并矢格林函数\[J\].华中理工大学学报,2000,28(2):36-39.
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