一种高精度欧拉算法在成形装药金属射流问题中的应用

构建了一套高精度的求解成形装药金属射流问题的数值方案，给出了适用于欧拉程序的同时考虑塑性温升和冲击温升的计算方法,通过固体炸药爆炸的经典算例证明了程序是高精度的。对成形装药金属射流进行了模拟，给出了炸药的起爆、金属衬垫的失效以及射流的形成过程。研究了衬垫形状对射流形状、速度和温度的影响,通过数值分析发现，随着衬垫顶角的增大，射流的长度变短，速度减小，衬垫材料的利用率有所增加;在爆炸载荷作用的初期，衬垫的温度随着衬垫顶角的减小而增大，而当射流形成并趋于稳定之后，4种衬垫构型产生的射流温度十分接近。

A high-resolution Eulerian method and its application to shaped charge jet

A high-resolution computational framework is established to solve the shaped charge jet. An expression which can be used in the Eulerian code, considering temperature rises caused by both shock waves and plastic work, is proposed. The self developed code is validated by a benchmark test, which is the detonation of a TNT slab. The numerical simulations of shaped charge jets are carried out. The processes of the explosive detonation, the collapse of the liner and the formation of the jet are numerically simulated. The influences of the liner configurations on the jet shape, velocity and temperature are analyzed. It is found that the jet is shorter and has lower velocity with a larger apex angle, but more liner material becomes jet. During the initial stage of the explosive loading, the smaller the apex angle, the higher the liner temperature. After the jets are formed, the temperatures of the jets with different liner shapes are close to each other.