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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.
A dynamic man-gun interaction model with 13 rigid bodies and 31 degrees of freedom is established, the muscle simulation is performed by using the spring-damping method, and the initial driving force on each joint is determined by the inverse kinematics method.Considering the mutual coupling between design parameters, The effects of radio frequency, spring stiffness and pre-pressure, cushion stroke on muzzle response were analyzed.The sensitivity analysis and optimization of the parameters were carried out based on multi-body dynamics model.The analysis results show that the increase of radio frequency for three shots The accuracy of the mouth is favorable. For the shots after the third shot, only a reasonable match between the firearm cushioning device and the human body system can effectively reduce the body’s beating displacement under the dynamic muzzle.