Quadrangular Shell Element for Simplified Magnetostatic Modeling of Thin Ferromagnetic Objects

Our goal is to calculate the induced magnetic anomaly caused by thin ferromagnetic objects immerged into an applied uniform magnetic field. A good solution to this open boundary problem is to use integral equation method. The major difficulty in magnetostatic modeling of thin ferromagnetic objects is the disproportion between the global size and the thickness of thin ferromagnetic objects. According to the physical property of the internal magnetic flux density of thin ferromagnetic objects, an efficient quadrangular shell element is proposed to simplify the magnetostatic modeling. All our experimental results show that it can dramatically decrease computation time and improve the accuracy of magnetostatic modeling.