Abstract
Magnetic field generated by the ferromagnetic material of underwater detectors varies with seawater pressure, which may affect the accuracy of deep-sea resource exploration. The effect of stress on magnetization is cumulative. In order to accurately simulate the influence of deep-sea pressure on the magnetic field around underwater detectors, it is very important to develop a transient magneto-mechanical numerical model. In this paper, a transient magneto-mechanical coupling model of a tank was developed to obtain the magnetic signal deviation caused by the magneto-mechanical coupling effect. By improving the Jiles-Atherton theory for complex stress and calculating the variation in magnetic field with pressure, the hysteresis effect between magnetization and stress was verified. Under different background magnetic fields, the effect of stress on magnetic field was determined by calculating the magnetic field distribution under different pressures.
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