Approaches to developing software for solving numerical problems using the finite-element method are briefly compared. Their conceptual advantages and disadvantages are determined. An example is presented of the computation of the dynamic magnetic field of a magnetizer of a magnetic-flaw detector of steel ropes uniformly moving along an open rope, the linear dimensions of individual parts of which differ by several orders of magnitude. The problems of adaptation and application of the GMSH + GetDP software package for the calculation of dynamic magnetic fields of electrical devices are considered. Features of the finite-element-mesh generation, its optimization, and the subsequent solution of systems of linear algebraic equations of higher orders are noted. The importance of choosing the necessary configuration of the GMSH + GetDP software package is shown by the comparison of the efficiency of application of different matrix-ordering algorithms and the appropriateness of taking into account the features of the hardware of the computer. The results of modeling a dynamic electromagnetic field under conditions of uniform motion are obtained, and a comparison with the results of modeling the electromagnetic field of objects without motion is carried out. The obtained results of comparison are analyzed. The areas of the greatest changes in the electromagnetic-field distribution at the poles of the magnetizer and in the region of the local rope defect are identified.
Russian Electrical Engineering – Springer Journals
Published: Feb 21, 2018
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