聚能装药作用下材料等效数值仿真

 采用实验方法确定目标毁伤研究中材料等效存在一定困难。为此，采用基于非线性动力学软件数值模拟仿真方法，研究聚能装药作用下材料的等效。首先利用AUTODYN非线性动力学软件，采用欧拉-拉格朗日的流固耦合方法，进行大量数值计算，通过比较相同计算时刻的破甲深度、所耗费时间以及射流头部速度等参数，确定对应于药型罩为某锥角值的最佳炸高。在此条件下，利用射流极限破甲剩余速度方法确定了两种钢材的等效系数，某新型装甲钢与45#钢的等效系数约为1.75。研究方法和研究结果对于某些弹药毁伤效能鉴定实验过程中等效靶的设置具有一定参考价值。

Numerical Simulation of Armored Material Equivalent Under the Action of Shaped Charge

It is difficult to implement the material equivalent using the method of experiment in the field of the target damage research. This paper uses a simulation method based on non-linear dynamical software to study the material equivalent under the action of shaped charge warhead. With Euler-Lagrange method, a large number of numerical calculations were carried out using AUTODYN, a non-linear dynamics software. According to calculation results, comparing parameters such as jet tip velocity, penetration depth and consuming time, etc., the optimum stand-off of the shaped charge corresponding with some conic angle is identified. On the basis of above results, the equivalent coefficient between some armored steel and 45 steel is obtained by using the method of anti-armor residual velocity. According to the method, at the same optimum stand-off, the relative velocity is the same after the same jet penetrates different material targets with different thickness, which means that the different thickness is equivalent. The equivalent coefficient is about 1.75 for some newest armor steel and 45 steel. Research results provide an equivalent target setting for warhead damage efficiency checkup tests.