可变形定向破片战斗部在不同展开模式下的性能数值模拟

Numerical Simulation of Deformable Directional Fragment Warhead Performance in Different Expansion Modes

为使战斗部具有多种定向毁伤模式并实现一定程度上的可控毁伤,提出了一种扇形装药的可变形定向破片战斗部,该战斗部可实现轴向展开和侧向展开2种模式。采用AUTODYN软件进行破片场的数值模拟。首先,基于战斗部单元体分析获得了距离轴心25 mm处的最佳起爆点位置;其次,对整个战斗部进行分析,在轴向展开模式下分析了轴向展开角度对破片飞散速度、破片数目和破片空间分布的影响,发现轴向展开角在60°~75°范围内毁伤效果较佳;最后,在侧向展开模式下分析了整个战斗部的破片速度和破片空间分布情况,结果表明破片具有明显的定向飞散特性。

In order to enable warhead to have multiple directional damage modes and to achieve a certain degree of controllable damage,a deformable directional fragment warhead with fan-shaped charge is proposed.It can realize an axial-expanding mode and an lateral-expanding mode.The AUTODYN software is used to carry out the numerical simulation of the fragment field.Firstly,the position of the initiation point at 25 mm away from the central axis is determined based on the analysis of the unit constituting the warhead.Secondly,for the axial-expanding mode,the influence of the axial-expansion angle on the fragment flying speed,the quantity and the spatial distribution of fragments are obtained.The results show that the damage effect of the warhead is better when the axial-expansion angle is in the range of 60°–75°.Thirdly,for the lateral-expansion mode,the velocity and the spatial distribution of fregments are analyzed.It showes that the fragments under the lateral-expansion mode have directional flying quality.