Abstract

The article shows the technique and results of magnetic hysteresis and eddy currents simulation in magnetic systems of magnetizing devices to detect flaws in steel ropes. In order to determine the distribution of the external magnetic and electric fields in a ferromagnet, a method of spatial integral equations is used with an algorithm to calculate the three-dimensional (3D)nonstationary magnetic field. To model the hysteresis, the scalar model of Jiles-Atherton is applied. As a result of the studies, the dependences of the magnetic induction vector component in the region of the local defect and in the steel rope at different speeds of the magnetizing device were obtained. The hysteresis model was tuned basing upon the limiting experimental dependence and local (partial)loops in the steel rope. The dependences of the residual value of the magnetic induction vector's tangential component in the rope were established for various movement speeds.

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