炸高对线性聚能装药射流毁伤混凝土墙体效果的影响

Influence of Stand-Off on the Damage of Linear Shaped Charge Jet on Concrete Walls

采用一种新型线性聚能装药结构,研究了不同炸高时线性聚能装药射流对混凝土墙体的毁伤效应。数值模拟发现,药型罩锥角为80°与50°时,能较好地避免拉断现象。得到了线性聚能装药结构的射流头部速度、侵彻深度随炸高的变化规律。炸高为60 mm时,最佳侵彻深度达130.6 mm。对炸高为60 mm与100 mm时的线性聚能装药进行试验研究。结果表明,炸高100 mm时,侵彻深度达到125.0 mm,与仿真结果吻合较好。验证了该线性聚能装药结构对混凝土墙体的毁伤效果较好。可为线性聚能装药结构的设计与试验研究提供参考。

A new type of linear shaped charge structure was adopted to study the influence of stand-off on the da-mage of linear shaped charge jet on concrete walls.In numerical simulations,it has found that when the cone angles of the shaped charge are 80°and 50°,it can effectively avoid the phenomenon of pulling and breaking.The variation law of jet head velocity and penetration depth with stand-off for linear shaped charge structure was obtained.The optimal penetration depth reaches 130.6 mm when the stand-off is 60 mm.Experimental study was conducted on linear shaped charge with stand-off of 60 mm and 100 mm.The results show that when the stand-off is 100 mm,the penetration depth reaches 125.0 mm,which is in good agreement with the simulation results.The linear shaped charge structure has been verified to have a good destructive effect on concrete walls.It can provide reference for the design and experimental research of linear shaped charge structures.