双层球缺药型罩形成杆式射流断裂特性研究

Study on Fracture Characteristics of Bar-type Jet in the Formation of Double-layer Ball

为提高大炸高攻击坦克顶甲的威力性能,针对大炸高下双层罩形成杆式射流的断裂情况,设计了球缺型药型罩装药结构,利用LS-DYNA软件对杆式射流的成型与断裂进行模拟仿真,对比单层罩与双层罩形成射流断裂情况。利用静破甲试验,同时运用闪光X光照相技术记录了两种罩结构的射流断裂情况。研究结果表明:在大炸高条件下,两种药型罩形成射流均发生断裂,而采用铜/铝双层球缺罩形成的复合杆式射流断裂情况更均匀、稳定且头部射流粒子间速度梯度明显变小;相同装药条件下,铜/铝双层球缺罩形成射流的侵彻能力相比单层纯铜球缺罩射流提高11.2%。

For the purpose of studying the fracture of the rod-shaped jet formed by the double-layer ball formation,the charge structure with the two kinds of copper-aluminum double-layer hood and pure copper monolayer was designed.The formation and fracture of the rod jets were numerically simulated through LS-DYNA software.The fracture of the two kinds of structure was recorded using X-ray photography.Finally,the steel target penetration experiment was carried out.The results show that the two kinds of structure are broken under the fried high,but the composite rod jet is formed by copper/aluminum double-layer blanks,and the velocity gradient between the head faults is obviously smaller.The copper/aluminum double-layer hood formed a jet penetration capability compared to a single copper hood jet that was significantly improved to 11.2%.