Design and Simulation Research on the Automatic Reset Device When the Floating Launch Weapon Misfired

Abstract

The automat of the high initial velocity grenade launcher may fail to reset automatically because of misfiring. Aiming at this problem,a misfired automatic reset device consuming the energy of gunpowder gas was designed. The feasibility of the device to realize the automatic reset of the automat was verified from mathematical modeling, numerical calculation and dynamics simulation. Firstly, the aerodynamic model of automatic reset device for misfiring was established based on the theory of weapon aerodynamics. Then,the effects of position of the gas guide hole,diameter of the gas guide hole and volume of the gas collection chamber on gas pressure of the gas collection chamber and initial velocity of the projectile were analyzed through numerical method. Finally,the dynamic modeling and simulation research was carried out,which includes the floating launch process of the weapon system and the automat reset process after misfiring. And the recoil force of the weapon shooting and the forward and recoil displacement curve of the automat were obtained. The results show that the automat reset automatically when the position of the air guide hole is 340 mm,the diameter of the air guide hole is 15 mm,and the length of the gas collection chamber is 50 mm. At this time,the initial velocity of projectile is 441.19 m / s,the loss rate of initial velocity is 2.12%,and the peak of recoil force is 754.73 N. This research can provide a theoretical basis for the design of the misfired automatic reset device for the floating launch weapon.