It is an effective means of reducing small-caliber automatic gun recoil to install the high-efficiency muzzle brake. Taking a small-caliber automatic gun as the research object,four kinds of muzzle brake were designed,and the buffer was redesigned. The dynamic rigid-flexible coupling model of small caliber automatic gun with low recoil was established,and the simulation was carried out. The parameters of the muzzle brake and the buffer were properly matched to significantly reduce the recoil of the weapon. If the parameters of muzzle brake and the buffer is not properly matched,the corresponding recoil of high-efficiency muzzle brake may be even greater than that of low-efficiency muzzle brake. The result shows that only reasonably matching the high efficiency muzzle brake and buffer can significantly reduces the chain gun recoil.%安装高效的膛口制退器是降低小口径自动炮后坐力的有效手段,以某小口径自动炮为研究对象,设计了4种膛口制退器,并重新设计了缓冲器,建立了小口径自动炮低后坐发射刚柔耦合动力学模型并进行了仿真,合理匹配了制退器与缓冲器二者的参数,使该武器的后坐力得到了明显的降低.如果制退器与缓冲器二者的参数匹配不好,则制退效率高的制退器的后坐力甚至可能会大于制退效率低的制退器的后坐力.研究结果表明,只有将高效的膛口制退器与缓冲器的参数合理匹配,才能使小口径自动炮的后坐力得到显著降低.
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