横纵刻槽对半预制战斗部破片成型的影响

为分析壳体内刻槽对半预制战斗部破片成型的影响规律,开展了不同工况的仿真计算,并对典型工况进行了试验验证.利用ANSYS/LS-DYNA有限元分析软件,对爆炸载荷条件下破片的破碎断裂规律进行了研究,得到了横向刻槽与纵向刻槽的形状、深度等因素对破片成型的影响关系.研究结果表明:仅有横向刻槽时,将形成较多碎小破片;仅有纵向刻槽时,将形成杆条式破片;同时预制横向刻槽与纵向刻槽时,纵向刻槽深度应比横向刻槽深度小于20%,可得到大小均匀、质量可控的破片;刻槽形状采用"V+V"型或"锯齿（斜口朝起爆点）+V"型时,破片破碎控制效果较好.对典型工况开展了试验研究,试验结果与仿真计算结果较为相似,证明了仿真规律的正确性. 

Influence of Transverse and Longitudinal Grooves on Semi-Preformed Warhead Fragment Formation

In order to analyze the influence of shell grooves on the fragment formation of semi- preformed warhead, the simulation calculation of different working conditions was carried out, and the experimental verification of typical working conditions was carried out. Using ANSYS/LS-DYNA finite element analysis software, the fracture law of fragments under explosive load was studied, and the influence of the shape and depth of transverse and longitudinal grooves on the fragment formation was obtained. The results show that more fragments will be formed when only transverse grooves are used. When only longitudinal grooves are used, rod fragments will be formed. When the transverse grooves and the longitudinal grooves are prefabricated at the same time, the depth of the longitudinal grooves should be less than 20% than that of the transverse grooves, so that fragments of uniform size and controllable quality can be obtained. When the groove shape is "V+V" or "saw tooth (inclined to the starting point) +V", the fragmentation control effect is better. The experimental study on typical working conditions was also carried out. The experimental results are similar to the simulation results, which proves the correctness of the simulation rules.