起爆方式对聚能射流影响的数值仿真研究

应用ANSYS/LS-DYNA3D有限元分析软件,采用ALE算法对在同种装药结构条件下的药型罩顶部单点起爆、顶面双环线起爆、装药面轴向外壁中心单环线起爆、三环线起爆后形成的聚能射流分别进行了数值模拟。计算结果表明,起爆方式对射流性能有着重要的影响,不同起爆方式在装药中形成不同的爆轰波形,药型罩顶部双环线起爆比单点起爆后形成的射流头部速度提高11.6%;装药面轴向外壁线起爆比药型罩顶部任何方式起爆后形成的聚能射流头部速度都低,装药面轴向外壁三环线起爆比药型罩顶部双环线起爆后形成的射流头部速度降低18%;同时进行了验证实验,仿真结果与实验结果吻合。

Numerical Simulation of Effect of Ignition Ways on Shaped Charge Jet

The ANSYS/LS-DYNA3D finite element analysis software and the Arbitrary Lagrangian-Eulerian(ALE) algorithms were used to simulate the formation processes of shaped charge jet under different ways of initiation,such as one point ignition,the liner top two ring line ignition,axial charge outer wall center one ring line ignition and three ring line ignition.Calculated results show that ways of initiation have great influence on jet performance.Different ways of initiation produce different shapes of detonation wave.The jet tip velocity produced by the ignition ways of the liner top two ring line is increased by 11.6% than that by the one point ignition,the jet tip velocity through the liner the axial charge outer wall ignition is lower than that by any other ways of the top of the liner,and the jet tip velocity produced by the liner the axial charge outer wall three ring line is decreased by 18% than that by the ignition ways of the liner top two ring line.The confirmation experiment was carried out.The simulation results are in accordance with the experimental data.