Abstract: To study the response characteristics of muzzle for self-propelled antiaircraft gun firing on the move, a dynamic model of self-propelled antiaircraft gun is established based on multi-body system theory, vehicle terrame chanics and gun launch dynamics. The stochastic road irregularities are simulated by means of the sinusoid superposition method. The muzzle responses in the conditions of driving and launch are obtained by numerical calculation. The effects of driving speed, road grade, launching load and firing angle on muzzle response of self-propelled antiaircraft gun are analyzed. The finite element method and the collision theory are used in consideration of the structural nonlinearity factor of antiaircraft gun, and the flexible barrel model and the contact model of ball bearing are applied to the dynamic model. The results indicate that the muzzle dynamic response increases with the increase in travel speed and road grade. The muzzle disturbances may vary greatly under the different conditions of launching. The results provide reference basis for grasping law of muzzle disturbances for self-propelled antiaircraft gun firing on the move.

Key words: ordnance science and technology, self-propelled antiaircraft gun, fire on the move, structural nonlinearity, muzzle disturbance, road spectrum