高射频步枪参数对枪口响应影响的分析

建立具有13刚体和31自由度的被动态人-枪相互作用模型,采用弹簧-阻尼方法进行肌肉模拟,利用逆向动力学方法确定各关节上的初始驱动力.考虑设计参数间的相互耦合影响,分析射频、缓冲簧刚度和预压力以及缓冲行程等参数对枪口响应的影响.基于多体系统动力学模型进行参数的灵敏度分析和优化.分析结果表明:射频增加对于3发点射情况下的枪口精度是有利的;对于第3发以后的射击,只有枪械缓冲装置与人体系统的合理匹配才能有效减小人体被动态下枪口的跳动位移.

Analysis on effect of high firing rate rifle parameters on muzzle response

The interaction model of human body in passive state vs gun is built, which is with thirteen rigid bodies and thirty one degree freedoms. The muscle is simulated by the spring damping method and the initial driving force on each joint is determined using the inverse dynamics method. Considering the mutual coupling effect of design parameters, the effect of the parameters on muzzle response is analyzed, and the parameters include firing rate, stiffness and preload of buffer spring, buffer stroke and so on. Based on a multi body system dynamics model, the parameter sensitivity is analyzed and optimized. The analysis results show that, the increase of firing rate is advantageous to muzzle accuracy under the condition of three shot burst; as to the burst after the third shot, only the rational match between the gun buffer equipment and the human body system could effectively reduce the muzzle jump displacement.