弹药因素对5.8mm步枪射击精度影响的因素及试验研究

在内弹道方程组基础上，结合数学偏导方法，推导出内弹道修正系数的理论计算公式，以5.8 mm步枪为武器研究平台，计算5.8 mm步枪装药量、弧厚、弹头质量的修正系数。结果表明：对5.8 mm步枪初速及最大膛压影响程度大小依次为装药量、球扁药弧厚、弹头质量。装药量在靶场试验中具有较精确可控性，用统计分析法仅对得到的发射药尺寸及弹头质量对5.8 mm步枪初速影响数据进行显著性分析，分析显示发射药尺寸较弹头质量对初速影响更为敏感，与理论计算结果相一致。从而得出改进发射药尺寸偏差是提高5.8 mm步枪射击精度的有效方法。

Theoretical and Experimental Study on the Influence of Ammunition on Firing Accuracy of 5.8 mm Rifle

The theoretical formula for calculating the internal ballistic correction coefficients is deduced using interior ballistics equations and derivative operation. The correction coefficients of charge weight, propellant web size and projectile mass are calculated for 5.8 mm rifle. The results show that the influences of the factors on the initial velocity and maximum bore pressure of 5.8 mm rifle are the charge weight, propellant web side and projectile mass in order. The charge weight can be controlled accurately, so only the significant effects of propellant’s size and projectile mass on the velocity of 5.8 mm rifle are analyzed by statistical analysis. The analysis result shows that the propellant’s size is more sensitive to velocity compared with projectile mass, which is in accord with the theoretical calculation. It is an effective way to increase the firing accuracy of 5.8 mm rifle by improving the deviation of propellant’s size.