中文摘要：

针对火炮立楔式炮闩抽筒系统中的卡壳和构件动态断裂等抽筒故障,以动力学理论为基础,将其转化为系统动态特性的定量研究。分析了抽筒系统的工作机理并建立了连续接触动力学模型,定量地推导出药筒及系统内接触构件的运动规律和碰撞载荷。建立了杠杆式抽筒子在抽筒过程中的弹性波动模型,采用该模型能够定量地得出抽筒子的动应力分布和力学参数的影响。进行了理想抽筒工况下理论模型的数值计算和实体模型的仿真模拟,同组比较结果验证了定量分析模型的合理性。所建模型可为解决抽筒故障提供理论依据,也可为抽筒系统的动力学和结构优化设计作铺垫。

英文摘要：

Aimed at the faults such as cartridge jamming and component dynamic fracture in the extractor system of an artillery vertical wedge breechblock,this paper was focused on transforming the extracting fault analysis to the quantitative study of the system dynamic characteristics based on the nonlinear dynamics theory.The working mechanism of the extractor system was analyzed firstly,and then a continuous contact dynamics model was established for deriving out the motion law of any components and the impact loads quantificationally during the extraction process.Moreover,the elastic wave model of the lever-type extractor was established,which can both describe the dynamic stress distribution and achieve the influences of the mechanical parameters of the extractor by the quantitative form.The numerical calculation of those theoretical models and the simulations of the virtual prototype were both conducted on the ideal extracting condition.The comparison results of the same group show that the quantitative analysis dynamic models are reasonable and effective,which provides a theoretical basis for the solution of the extracting fault and the dynamics optimization of the extractor system.