枪榴弹侵彻木靶板时前冲过载特性仿真研究

摘要

ln order to give a reference to optimal design of a rifle grenade mechanical contact fuze, LS-DYNA is used to simulate the process of rifle grenade penetrating target plate. The warhead of rifle grenade is truncated cone, and the diameter at the end of war-heads. the thickness of target plate and the angle of bul et penetrating target plate are al different. Through the simulation the set-for-ward overload factor and speed of rifle grenade at its warhead penetrating targets are got. Then the simulation results demonstrate that the change of set-forward overload factor and speed of rifle grenade is different on the different conditions of the penetration. ln the initial moment of penetrating the target plate vertical y, the set-forward overload factor is maximum, and the attenuation of speed is quickest. Assessing the fuze triggering sensitivity and insensitivity in shooting range, some factors should be considered, including penetrating angle, gesture and thickness of the target ,and diameter at the end of warheads.%为给枪榴弹机械触发引信性能优化设计提供参考，利用LS－DYNA软件仿真截锥形弹头不同端面直径的枪榴弹以不同着角侵彻不同厚度木质薄靶板过程，得到了弹丸头部在贯穿靶板过程中弹丸前冲过载系数和弹丸速度。结果表明：着角、弹头端面直径、靶板厚度不同时，弹丸侵彻过程中前冲过载系数变化和速度变化不同；弹丸最大前冲过载系数出现在弹丸垂直碰击靶板的初始时刻；弹丸速度在侵彻初始阶段衰减最快。在靶场射击试验考核引信触发作用灵敏度和钝感度时，应考虑弹丸着角、立靶姿态、靶板厚度和弹头端面直径等因素的影响。