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Decoupled magnetoelastic finite element method including magnetostriction effects in electrical machinery applications

Magnetostriction is one of the main causes of noise and vibration in electric machinery and equipment. A decoupled method is proposed to handle the computation of magnetostriction effects and inverse magnetostriction effects in ferromagnetic materials. To consider effect of magnetostriction in structure solver, the derived magnetostriction from magnetic field solution is converted to volumetric force density and applied as external load. The effect of invers magnetostriction on magnetic field is taken account by reconstructing the nonlinear BH curves along each local major axis. The proposed method can be applied to model magnetostriction on different mesh with different solver. With this method, the magneto-elastic Multiphysics coupling can be handled with great flexibility and reliability.