关键词: 火炮振动, 发射动力学, 弹丸起始扰动, 弹与炮相互作用

Abstract: A projectile dynamic model under artillery dynamic coordinate system was established to study the formation mechanism of initial disturbance of projectile during long-range artillery firing based on KANE dynamics method. Based on this model, a description method of projectile motion in the artillery movement environment is proposed, and the expressions of the interaction force and moment between the projectile and the gun are given. Combined with the engineering practice, the projectile movement laws during projectile launching are investigated. Then the effects of projectile-barrel gap, projectile mass eccentricity, leakage of gunpowder gas in the bore, bounce of gun mount and elastic vibration of the barrel on the initial disturbance of projectile were verified by simulations. The results show that the leakage of gunpowder gas in the bore may cause the abnormal movement of projectile in the bore, resulting in severe initial disturbance; the bending and elastic vibration of barrel have significant effect on the initial disturbance, and the bounce of gun mount has little effect on the movement and initial disturbance of projectile. The results can provide some important theoretical basis for improving the design of long-range artillery and the shooting accuracy.

Key words: artilleryvibration, launchdynamics, projectileinitialdisturbance, interactionbetweenprojectileandartillery