以射击精度为目标的枪口动力学特性分析与匹配

摘要

In order to improve the firing accuracy of a 12.7 mm heavy machine gun system,the effects of the muzzle mass on the muzzle dynamic responses and firing accuracy were studied with rigid-flexible coupling dynamics,exterior ballistic theory,and corresponding experimental test data.Studies show that:as the muzzle mass increase,the shot dispersion parameters R50,R70 will increase first and then decrease.Since excessive muzzle mass will make it not easy to achieve lightweight design of a machine gun system,it is advisable to reduce the mass nearby muzzle.When reduce the muzzle mass to zero,shot dispersion parameters R50,R70 in the initial design will be significantly reduced from 7.7 cm,11.6 cm to 2.7 cm,5.0 cm,and can be increased by 0.65 and 0.57 times,respectively.%为了提高某12.7 mm重机枪射击精度,结合机枪系统刚柔耦合动力学计算、外弹道理论以及相关实验数据对枪口动力学特性进行了匹配分析,研究了枪口质量对其动力学响应特性以及射击精度的影响.研究表明:弹头散布参数R50、R70将随着枪口质量的增加而呈现出先上升后下降的趋势.由于过大的枪口质量不利于实现机枪系统的轻量化设计,为了提高机枪系统射击精度,应尽量减小枪口附近质量.当枪口质量逐渐减小并趋于零时,射击精度参数R50、R70分别原来的7.7 cm、11.6 cm下降至2.7 cm、5.0 cm左右,可分别提高0.65倍、0.57倍左右,效果较好.