Reconstruction of local magnetic properties of steel sheets by needle probe methods using space mapping techniques
作者： Guillaume Crevecoeur , Luc Dupré , Lode Vandenbossche , Rik Van de Walle
DOI: 10.1063/1.2176321
关键词: Materials science 、 Magnetic hysteresis 、 Nonlinear system 、 Finite element method 、 Space mapping 、 Punching 、 Magnetic field 、 Acoustics 、 Inverse problem 、 Nondestructive testing
摘要: Cutting stresses introduced by punching influence the magnetic characteristics of electrical steels. A nondestructive experimental method used for measuring flux distributions in laminations is needle probe method. The signals can be simulated solving two-dimensional nonlinear diffusion equation field combination with a proper Preisach model. parameters several subregions steel sheet which best fit input are obtained inverse problem. minimizing cost function space mapping technique. This technique combines fine model, uses finite element method, semianalytical coarse reduces problem to linear
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