平顶尺寸与起爆环半径对复合药型罩形成射流的影响

Study on Influence of Flat Top Size and Annular Detonation on Forming of Composite Liner Jet

为研究复合药型罩平顶尺寸与起爆环半径对射流头部速度及成形的影响,对不同平顶尺寸和起爆环半径的铜-铝复合药型罩进行数值模拟。利用AUTODYN-2D模拟药型罩的变形和射流的形成及断裂的过程,仿真平顶尺寸对射流的影响、起爆环大小对双层药型罩形成射流的影响、平顶尺寸与起爆环半径对射流成形的影响,并分析外罩挤破内罩状况。结果表明:小起爆环半径时,药型罩平顶尺寸越小,射流头部速度越高;大起爆环半径时,较大的平顶尺寸可获得较高的射流头部速度,平顶尺寸增加到装药口径20%左右时,成形中会出现内罩挤破外罩的现象。

To study the influence of flat top size and initiation ring radius of composite liner on jet head velocity and forming,numerical simulation of copper-aluminum composite liner with different flat top size and initiation ring radius was carried out.Use AUTODYN-2D to simulate the deformation of composite liner and the formation and fracture process of the jet,simulate the effect of the flat top size on the jet,the influence of initiation ring size on jet formation,the influence of flat top size and initiation ring radius on jet forming were simulated,and the situation of liner crushing inner liner was analyzed.The results show that when the detonating ring radius is small,the top size of composite liner is smaller,and the jet head velocity is higher;when the detonating ring radius is large,the larger top size can obtain a higher jet head velocity.When the charge diameter is increased to about 20%,the inner cover may break the outer liner during forming.