【摘要】 用AUTODYN-3D数值模拟方法研究聚能装药在多点起爆条件下金属药型罩碎裂失效行为,获得了药型罩材料、壁厚及曲率半径等对碎裂形成破片特性的影响。结果表明,在多点起爆条件下,爆轰波在药型罩壁面相互叠加产生强应力集中带,导致罩材沿应力集中带发生切割性碎裂失效形成与起爆点数相等的规则杀伤破片。进一步数值模拟分析表明,药型罩碎裂失效行为显著受罩材及其结构参数的影响。对于钢质药型罩聚能装药,在罩壁厚为0.04~0.05倍装药直径、曲率半径为0.9~1.0倍装药直径条件下,可形成杀伤性能良好的规则破片。更多还原

【Abstract】 The fragment formation behavior of multi-point initiation dual-mode shaped charge is presented by using AUTODYN-3D code simulations. The effects of liner materials,wall thickness and curvature radius on its fragmentation behavior are also obtained. The numerical results show that the detonation wave superposition and strong stress concentration on the metal liner surface could be produced by a multi-point initiation of shaped charge,resulting in a cutting-like fragmentation behavior of liner materials along the stress concentration zone,and forming the same number of regular lethal fragments as that of initiation points. Moreover,the further simulations show that the fragmentation behavior of metal liner strongly depends on its materials and configuration. For a shaped charge with steel liner,the high lethal fragments could be achieved while a liner thickness of 0. 04 to 0. 05 charge diameters and a liner curvature radius of 0. 8 to 1. 0 charge diameters are selected.更多还原