起爆点位置对战斗部爆炸破片特性的影响

Research on fragments characteristic of cylindrical warhead when detonated at different points

针对反舰武器战斗部在舰船舱室内部爆炸时,自然破片分布情况难以用理论方法描述的问题,采用光滑粒子动力学方法研究了圆柱形战斗部爆炸形成破片的过程,分析了端点起爆和中心点起爆时圆柱形战斗部壳体爆炸破片的空间分布及速度特性.结果表明:端部起爆时战斗部破片分布不具有对称性,远离起爆点的端部封盖形成的破片速度最大,质量较大的破片产生于距离起爆点较远的4/5圆柱形壳体处和两端封盖上.中心点起爆时圆柱形壳体中部和端部封盖形成的破片速度相差不大,质量较大的破片主要分布在两端封盖上.

The warhead of an anti-ship missile is probably to explode inside a cabin of ship. However, there are no corresponding theoretical analysis models to determine the characteristics of fragments distribution of the cylindrical warhead with fiat ends. In this paper, the expansion and rupture process of cylindrical warhead under the inner pressure of detonation products were simulated numerically with smoothed particle hydrodynamic （SPH） algorithms. The comparative analysis of spatial distribution and velocity characteristics of fragments produced by the warhead under the conditions of ignition at the endpoint and midpoint of the charge was performed. The results reveal that the spatial distribution of fragments of cylindrical warhead was unsymmetrical when the warhead detonated at end- point. A fragment with maximal velocity was produced by the far-end of warhead case, and more massive fragments were produced at the 4/5 cylindrical case and two ends. Meanwhile, the maximal velocity of fragment from the cy- lindrical case was close to that of from the ends of the warhead and more massive fragments were noticed from two ends when the warhead detonated at midpoint.