Abstract: The process of projectile band bayonet-chamber of a new type 155mm howitzer is analyzed to investigate the effect of band bayonet-process parameters on the initial conditions of motion of projectile in bore, and the effects of changes in various parameters of band bayonet-process are presented, such as projectile velocity, frictional coefficient, quadrant angle, initial deflection and barrel-projectile gap. The results are obtained based on the dynamic explicit finite element method. Thus, the factors that influence the bayonet-chamber depth, band-barrel reaction force and bayonet-chamber posture are shown. Among them, the projectile velocity and frictional coefficient have significant influence on the bayonet-chamber depth and the band-barrel reaction force, the quadrant angle and initial deflection have major impact on the bayonet-chamber posture, meanwhile, the barrel-projectile gap playes an important role in all the three results. The results provide a parameter basis to the ammunition rammer design and the motion law of projectile in bore.

Key words: ordnance science and technology, bayonet-chamber, finite element method, result of band bayonet-chamber process