胶泥缓冲器与高射机枪动力学性能优化匹配

Dynamic Performance Optimization Matching of Elastomer Damper and Anti-aircraft Machine Gun

为了改善机枪的射击稳定性从而提高射击精度,设计一款应用于12.7 mm重型机枪的单出杆式黏弹性胶泥缓冲器,用变刚度Kelvin模型对其进行数学建模.用正交试验法对黏弹性胶泥缓冲器的刚度、阻尼系数和预压力进行优化匹配分析,获得胶泥缓冲器与高射机枪动力学匹配最好的一组性能优化参数.优化匹配的黏弹性胶泥缓冲器与弹簧缓冲器动力学性能仿真比较结果表明,使用胶泥缓冲器的12.7 mm重型机枪后坐力更小,后坐速度变化更平稳,枪口波动更小.

To improve the shooting stability of machine guns and firing accuracy,a single rod viscoelastic elastomer damper applied to 12.7 mm heavy machine guns was designed,which was simulated by the variable stiffness Kelvin model.The three important performance parameters(stiffness,damping coefficient,and initial pressure)of the viscoelastic elastomer damper were optimized and matched by orthogonal experiments,and a set of performance optimization parameters best matched the dynamics of the elastomer damper and the anti-aircraft machine gun were obtained.Finally,the dynamic performance of the optimized matching viscoelastic elastomer damper was compared with the spring damper.The results showed that the recoil force of the machine gun using the elastomer damper was smaller,the recoil speed changed more smoothly,and the muzzle fluctuation was smaller than that of the 12.7 mm machine gun equipped with the spring damper.