Identification Method of Projectile Penetration Process Based on Active Magnetic Detection
Aiming at the problem that the existing active magnetic detection penetration process identification method has the problems of large volume of double magnetic blocks,poor installation consistency,and great in-fluence of relative position disturbance on the identification of penetration process,an active magnetic detection penetration process identification method using a single magnetic block excitation magnetic field was proposed,and the penetration process under different working conditions was simulated and analyzed.The magnetic field was generated by the magnetic block installed inside the fuze.The ferromagnetic steel bar in the target plate changed the magnetic field inside the fuze,and the change of the magnetic field had a corresponding relationship with the relative position of the projectile-target during the penetration process,which could realize the identifi-cation of the penetration process of the projectile to control the initiation.The finite element simulation model of projectile penetrating reinforced concrete target plate was established by COMSOL software.The relative posi-tion of magnetic block and magnetic sensor was determined by simulating the change of internal magnetic field of fuze under the coupling of projectile and target penetrating single-layer target.The simulation analysis of differ-ent penetration conditions of multi-layer target and thick target was carried out,and the corresponding relation-ship between the magnetic field change and the penetration process when the projectile penetrates multi-layer target and thick target was obtained.The larger the penetration angle,the more obvious the hysteresis of mag-netic field intensity change.The results showed that the active magnetic detection method could be used to iden-tify the penetration process under different working conditions and control the detonation.
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