研究了弹丸动态冲击对火炮初速、最大膛压等内弹道性能的影响。针对某火炮弹炮配合后弹丸存在较长自由行程的特点,考虑弹丸挤进时的动态冲击效应,建立了挤进阻力计算模型,应用两相流内弹道理论计算了其内弾道性能。进行了该火炮的内弹道性能试验,计算结果与试验值吻合较好。研究表明弹丸动态冲击条件下,最大膛压下降,初速降低。

The influence of impact of projectile on interior ballistic performance was studied, such as muzzle velocity, maximum press. A model for calculating resistance of the projectile was built based on characteristic of long free path of structure projectile-gun in this paper. The impact of the engraving process was taken into consideration, and according to two-phase flow interior ballistics theory, the interior ballistic performance was calculated. A test for interior ballistic performance was accomplished. The calculation results were in good agreement with test results. The studies show that muzzle velocity and maximum press decrease under impact of projectile.