聚能射流对带壳浇注PBX装药的撞击响应

Reaction Characteristics for Shelled Cast-cured PBX Explosive Impacted by Shaped Charge Jet

为研究聚能射流对带壳浇注高聚物粘结炸药(PBX)的引爆特性,利用弹径Ф82 mm的聚能装药形成了一种直径细、速度大于7000 m·s-1的高速射流,以及一直径较粗、速度约5000 m·s-1长杆状射流,分别对覆盖有210,255 mm和165,210 mm两组不同厚度钢板的PBX进行了撞击试验。采用高速摄影观测分析了射流撞击下带壳PBX点火引爆的反应过程。用LS-DYNA软件验证了试验结果,得到了不同射流对PBX的引爆能量值。结果表明:弹径Ф82 mm的聚能装药形成的射流能够可靠引爆覆盖小于255 mm厚钢板的浇注PBX,能满足反导弹战斗部毁伤厚壳体目标的需求。

To study the initiation/detonation characteristics of the shelled cast-cured polymer bonded explosive（PBX） caused by shaped charge jet, the impact test of the PBX explosive, overlaid by two groups of steel plates with thickness of 210, 255 mm and 165, 210 mm, was performed respectively by shaped charge with different forms and jet velocities, produced by the shaped char- ges with diameter of 82 mm, that is a small diameter and velocity is greater than 7000 m · s-1 high-speed jet, another thicker di- ameter and about 5000 m · s-1 jetting projectile charge. The shock initiation and detonation processes of the PBX explosive were observed and analyzed by high-speed photography. The experiment results were verified by LS-DYNA software. The values of initi- ation/detonation energy of the PBX explosive caused by different jets were obtained. Results show that jets formed by shaped char- ges with diameter of 82 mm can reliably cause the shock initiation and detonation of the PBX explosive overlaid by steel plates with thickness of less than 255 mm, can meet the needs of anti-missile warhead to damage the thick shell target.