用基于等磁能法的有限元法计算二维非线性涡流场

Finite Element Method Based on Equivalent Magnetic Energy Method for Computation of 2-D Noalinear Eddy-current Field

本文讨论了用矢量磁位求解的二维非线性涡流场的有限元计算方法，包括平面场及轴对称场．采用了涡流场中铁磁材料磁化曲线的一种处理方法──等磁能法，并且给出了非线性涡流场的有限元计算格式．最后用该方法分析了一台感应钢包炉中的，涡流场及炉料（钢水）的受力情况，并绘制了相应的曲线．

This paper discusses the finite element method using vector potential tosolve 2-D nonlinear eddy-current field,including planar field and axisymmetricfield. The authors use the equivalent magnetic energy method(EMEM) to treatmagnetization curve of ferro-magnetic material in eddy-current field, and give afinite element formulation of 2-D nonlinear eddy-current field.,With this methodanalyses of the eddy current field in an induction ladle furnace and the strengthdistribution in the charge (melten steel) are made, and corresponding curvesplotted.