磁-光/涡流成像技术的有限元分析

Finite Element Modeling of Magneto-Optic/Eddy Current Imaging Technology

近年来迅速发展的磁 -光成像 (MOI)技术使涡流检测技术得到了新的进展。本文运用磁 -光 /涡流成像的有限元模型对典型的飞机构件缺陷 (如连接飞机表面两个铝层的紧固件下面的裂纹 )进行模拟。模拟结果表明 ,其磁场垂直分量的变化对这种结构来说是相当灵敏的 。

Eddy current inspection of aging aircraft has currently achieved new developments with the introduction of Magneto-Optic Imaging(MOI).Finite element modeling of eddy current magneto-optic imaging is invoked in this paper and applied to a typical defects of aircraft configuration,such as a flaw initiating under the cap of a fastener used to connect two aluminum layers of the aircraft skin.Simulation results revealed that the change in the vertical component of the magnetic field is noticeable for this configuration,and that MOI can be used to detect hidden flaws covered by the fastener cap.