Eddy current loss calculation method for large phase modifier end steel structural member

The invention discloses an eddy current loss calculation method of a large phase modifier end steel structural member. The method is characterized in that, based on equivalent computation, the nonlinear transient analysis of the end part model of the phase modifier is equivalent to nonlinear static analysis and linear time-harmonic analysis by adopting an impedance boundary condition and a methodfor keeping magnetic density equal, so that the problem of unit subdivision caused by a skin effect is avoided, the calculation time of eddy-current loss is effectively reduced, and the stability andaccuracy of calculation are improved. 本发明公开了一种大型调相机端部钢制结构件的涡流损耗计算方法，其特征在于，基于等效计算的思想，通过采用阻抗边界条件和保持磁密相等的方法，将调相机端部模型的非线性瞬态分析等效为非线性静态分析和线性时谐分析，避免了因趋肤效应带来的单元剖分问题，有效减少了涡流损耗的计算时间，并提高了计算的稳定性和准确性。