药型罩锥底形状微小变化对聚能射流与杵体分开时间影响的数值模拟

Numerical simulation of separation of the influence of time on small changes in the shape of the body of liner end jet and pestle

在同样装药的情况下,随着药型罩锥底直径的加大,它底部质量加大,同样能量的基础上它底部的速度梯度变化变大就加快了射流与杵体的分开,相反情况它底部的速度梯度变化变小,射流与杵体的分开时间要加长。利用ANSYS/LS-DYNA3D有限元分析软件,对在同种装药条件下,由于药型罩锥底形状微小变化对聚能射流与杵体分开时间影响过程分别进行了数值模拟和对比分析。结果表明药型罩锥底形状微小变化对聚能射流与杵体分开时间有着重要的影响,药型罩锥底下半段口径加大会延长聚能射流与杵体的分开时间,药型罩锥底下半段口径减小会缩短聚能射流与杵体的分开时间。

On the same charge, with the shaped charge liner to increase the diameter of cone at the end, it is the bottom of the quality increase, on the basis of the same energy at the bottom of the velocity gradient is larger to speed up the body of the jet and the pestle to separate the opposite Situation it is the bottom of the velocity gradient becomes smaller, the separation of the jet and the pestle time to lengthen the body. On the same charge under the conditions of the end of the cone shape of liner tiny Changes in body Jet and pestle were separated in time affect the process was simulated and analyzed by ANSYS/LS-DYNA 3D. The results show that the end of Liner small changes in the shape of the jet and the pestle shaped body has an important effect separated in time, liner under half of the diameter increase would extend the Jet and pestle body separated in time, under the liner half of the diameter decrease will reduce the jet and the pestle shaped body separated in time