Research On Velocity Increase Technology Of Projectile Gun Muzzle Solenoid Coil

With the continuous progress of firing technology and the needs of modern warfare forms,the demand for high muzzle velocity of naval gun projectiles is becoming more and more prominent.In order to increase the muzzle velocity of naval gun projectiles and improve their interception efficiency and destruction effect,this paper introduces electromagnetic coil firing technology into traditional naval gun weapon system,designs asynchronous induction type electromagnetic coil speed increasing device for naval gun muzzle,and uses ANSYS Maxwell and Workbench for simulation analysis.Firstly,through the analysis of electromagnetic emission theory,the type of naval gun projectile electromagnetic velocity increasing device is determined as asynchronous induction type electromagnetic coil launcher.The Maxwell 2D transient simulation model was initially established,and the parameters were optimized to obtain the optimal structural parameters and three-phase electrical excitation parameters of the single-stage electromagnetic coil booster.The simulation also analyzes the influence of the shell material of the naval gun on the speed increase effect of the electromagnetic coil booster system,and the results show that the copper belt of the projectile has an obvious effect on its electromagnetic acceleration.In addition,the simulation analysis of the difference of acceleration efficiency of the projectile with different initial velocities in the single-stage drive coil shows that the acceleration efficiency of the electromagnetic coil acceleration system can be effectively improved by increasing the frequency in multiple stages.Then,the optimized parameters are used to design a single-stage asynchronous induction type solenoid coil acceleration system and conduct Maxwell 2D and 3D transient simulations.The simulation results show that the projectile induction current is mainly concentrated in the projectile belt and the surface of the nearby projectile shell,and the projectile acceleration speed is 112m/s in 2D simulation and 103.7m/s in 3D simulation.Finally,the three-stage asynchronous induction type solenoid speed increase system was designed and Maxwell 2D and 3D transient simulations were performed.307m/s of projectile speed increase was obtained from 2D simulation and 294.9m/s from 3D simulation,indicating that the asynchronous induction type solenoid speed increase device designed in this paper can effectively increase the muzzle velocity of naval gun projectiles.At the same time,in order to test the launch safety of the projectile,the transient thermal simulation module of ANSYS Workbench finite element software was used to simulate and analyze the temperature rise of the projectile,and the results showed that when the projectile was accelerated in the three-stage electromagnetic coil speed increaser,the local maximum temperature rise of the projectile surface was 809.44℃,and the internal temperature remained below 100℃,which proved that the asynchronous induction type electromagnetic coil speed increaser system designed in this paper was safe and effective.The asynchronous induction type electromagnetic coil acceleration system designed in this paper was proved to be safe and effective.