【摘要】 为减小外能源枪械传动系统的冲击载荷，采用了凸轮式外能源枪械传动系统，选取了4种凸轮运动规律进行凸轮设计，确定了外能源枪械抽壳阻力曲线，通过动力学仿真分析方法分别对这4种凸轮对枪械自动动作运动特性的影响开展仿真研究。以枪机框运动过程中的冲量为评价目标，分别分析采用不同凸轮的外能源枪械后坐及复进过程中的冲量大小，对比不同凸轮轮廓曲线对枪械的影响，结果表明，外能源枪械凸轮轮廓曲线在后坐过程中采用修正梯形运动规律、在复进过程中采用简谐运动规律时，枪械自动动作运行最平稳、工作可靠。其中，外能源枪械后坐过程采用修正梯形运动规律可比采用等加速运动规律冲量下降85.86%,复进过程采用简谐运动规律可比采用摆线运动规律冲量下降15.94%。更多还原

【Abstract】 In order to reduce the impact load of external energy firearms transmission system, a cam type external energy firearms transmission system was used. Four cam motion patterns were selected for cam design and an external energy firearm extraction resistance curve was determined. The influence of these four cams on the automatic motion characteristics of firearm was simulated and studied through dynamic simulation analysis methods. The impulse during the movement of the bolt carrier was chosen as the target, then the impulse size during recoil and counter-recoil processes of external firearm under different cams were analyzed respectively. Comparing the influence of different cam profile curves on firearms, the results showed that when the cam profile curve of external energy firearms adopts a modified trapezoidal motion law during recoil process and a simple harmonic motion law during counter-recoil process, the automatic action of the firearm is the most stable and reliable. Among them, using a modified trapezoidal motion law during the recoil process of external energy firearms can reduce the impulse by 85.86% compared to using an equal acceleration motion law, and using a simple harmonic motion law during the counter-recoil process can reduce the impulse by 15.94% compared to using a cycloidal motion law.更多还原