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.
图16是弹簧缓冲器与胶泥缓冲器枪口上下波动对比曲线图,该图是模拟6次射击枪口上下波动曲线. 从图16中可以看出,使用胶泥缓冲器的机枪枪口最大波动是3 mm,而使用弹簧缓冲器的机枪枪口波动为5 mm. 使用胶泥缓冲器的机枪枪口上下波动比使用弹簧缓冲器的机枪降低了2 mm. 由此可见,胶泥缓冲器在提高射击精度方面作用明显.
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