弧形三脚架减振效果及射击精度改善研究

为研究一种新型弧形三脚架结构对机枪振动抑制以及射击精度改善情况，基于ADAMS以及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。在其余条件一致的情况下，对比了不同枪架在射击过程中的膛口动力学响应。根据外弹道理论，以及弹头出膛口扰动，对射击100m距离弹头散布进行了计算。结果表明：膛口的振动主要体现在高低方向上(y轴)，在该方向上膛口位移、速度、射角峰值平均值分别降低了27.8%、25.8%、31.1%左右。弧形三脚架对应的弹头散布圆半径R100，R50分别改善了33.6%、23.2%。弧形三脚架结构可有效改善机枪系统射击精度。

Research on Vibration Reduction Performance of Arc Tripod Structure for Firing Accuracy Improvement

For the study of vibration reduction performance and firing accuracy improvement of a new type of arc tripod structure, an accurate rigid-flexible coupling multi-body model of a machine gun system is then established based on ADAMS software as well as related experimental data. The muzzle dynamic responses of the machine gun system with different tripod structure were compared under the same conditions. Based on the exterior ballistic theory and its boundary conditions, the shot dispersions are obtained with a firing distance of 100 meters. The results show that the muzzle vibration is mainly occurs in the vertical direction(y axis). In this direction, the peak amplitude averages of the displacement, velocity and firing angle decreased by about 27.8%、25.8%、31.1% respectively. And finally the radius of 100%, 50% scattered circle decreased by 33.6%、23.2% respectively. The arc tripod structure can effectively improve the firing accuracy of the machine gun system.