In order to study the effect of rifling type on the firing performance of firearms,finite element model simulations of a rectangular rifling and a curved rifling are carried out.The influence of rifling type on the score,stress,attitude and force of the barrel is analyzed by combining numerical simulations and experiments.By comparing the projectile and barrel force analysis of the rectangular rifling and curved rifling,the following conclusions are obtained:compared with that in the rectangular rifling,the bullet engraving into the curved rifling has a smaller centroid deviation,and the whole firing process is more stable;the bullet is subjected to less stress and strain,the bore is subjected to less wear,and the overall life is improved;the bullet has a higher muzzle velocity and more power.The research can provide reference for the motion attitude and barrel design of the projectile.
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