喷管气流反推技术在改善机枪射击精度中的应用

为了改善机枪系统射击精度,将喷管气流反推技术应用于某12.7 mm重机枪系统,在枪管不同位置设计喷管,并设计了3种喷管工作方案进行比较。根据相关实验数据,建立了准确的机枪系统刚柔耦合动力学模型并进行计算,获得了弹头出膛口瞬时膛口响应。根据外弹道理论,对射击距离100 m弹头散布进行计算,对比了不同喷管作用形式对机枪系统射击精度的改善情况。研究结果表明:喷管以力矩形式作用于枪管时,弹头出膛口瞬时高低方向位移、射角、速度扰动波动小,射向一致性高,对应的散布圆半径R50改善72.3%左右,可有效改善机枪系统射击精度。

The Application of Reverse Jet Gas Technology in Improving Firing Accuracy of a Machine Gun System

The reverse jet gas technology is proposed to improve the firing accuracy of a 12.7 mm heavy machine gun system. The nozzles are designed at the different positions of the gun barrel, and 3 operating modes of nozzles are then designed for comparison. An accurate rigid-flexible coupling multi-body model of the machine gun system is then established based on related experimental data，and the muzzle dynamic responses are obtained through dynamic simulation. Based on the exterior ballistic theory and the boundary conditions, the bullet dispersions are obtained with a firing distance of 100 m, and the improved conditions of the firing accuracy of the machine gun system are compared. The results show that the initial displacement, firing angle and velocity are stable with little fluctuation when the nozzle thrusts form a moment. The radius of 50% scattered circle is decreased by about 72.3%. The reverse jet gas technology can effectively improve the firing accuracy of the machine gun system.