锥弧结合罩形成长杆状密实EFP的可行性

Feasibility of the Formation of Long Rod-shaped Compacted Explosively Formed Penetrator by Cone-arc Liner

为了进一步提高爆炸成型侵彻体(EFP)的侵彻能力,基于大锥角罩结构的圆弧段设计,提出了一种可形成长杆状密实EFP的锥弧结合罩。分析了锥弧结合罩与传统的大锥角罩和弧锥结合罩在压垮过程中的区别。运用LS-DYNA仿真软件,计算得到了锥弧结合罩的结构参数(曲率半径、锥角、壁厚)对EFP速度、长径比、密实度等侵彻体成型参数的影响规律。找出了EFP成型较佳时各结构参数的取值范围:曲率半径为1.1～1.3倍装药口径,锥角为155°～160°,壁厚为0.04～0.046倍装药口径,并设计得到了一种可形成长径比为2、密实度为0.88的EFP的锥弧结合罩结构。

To furtherly improve the penetration capability of explosively formed penetrator(EFP),a type of cone-arc liner which can form long rod-shaped compacted EFP was proposed based on the arc section design of large cone angle liner structure.The difference in collapse process for cone-arc liner and the traditional large cone angle liner as well as arc-cone liner was analyzed.The influences and regulars of cone-arc liner structure parameters(curvature radius,cone angle and wall thickness)on the formation parameters of penetrator,such as EFP velocity,length-diameter ratio and compactness,were calculated and obtained by LS-DYNA simulation software.The range of each parameters of optimum EFP are gained:the curvature radius is 1.1-1.3 times of charge diameter,the cone angle is 155°-160°,and the wall thickness is 0.04-0.046 times of charge diameter.And a kind of cone-arc liner structure that can form EFP with length-diameter ratio as 2 and compactness as 0.88 was designed and obtained.