Analysis of Magnetomechanical Effect of Magnetic Cavity under Geomagnetic Field

Most of the underwater vehicles are made of ferromagnetic materials. Under the action of geomagnetism, ferromagnetic materials cause magnetic anomalies in the surrounding space and become an important exposure source. Based on the analysis of the mechanism of the ferromagnetic compensation of the submerged magnetic field, it is shown that the ferromagnetic compensation method is the key to improve the submergence compensation ability of the submerged magnetic field According to the stress distribution of magnetic cavity under external pressure, the mathematical model of non- uniform distribution of magnetic charge is established. The weak magnetic signal characteristics of magnetic cavity under different pressure are analyzed. The external pressure increasing factor of the weak magnetic signal is extracted, and the corresponding relationship between the external pressure and the weak magnetic signal is analyzed, which provides theoretical support for the induced magnetic field compensation considering the magneto-mechanical effect.