战斗部对混凝土先侵彻后爆轰的数值模拟

利用自编光滑粒子动力学( SPH)程序给出战斗部对混凝土先侵彻后爆炸的数值模拟。在侵彻阶段弹体划分成Lagrangian标准有限元网格，而混凝土则划分成光滑粒子。在启动炸药爆轰计算前将弹体材料的有限元网格也转换成光滑粒子。通过对混凝土先侵彻后爆轰的二维计算给出弹坑的最终体积，同时还给出战斗部壳体膨胀平均速度的历史曲线以及爆轰产物的平均压力过程曲线。

Numerical Simulation of Penetration-then-Detonation of Concrete Target with Projectile

The numerical simulation of penetration-then-detonation of concrete with projectile was presented using smooth particle hydrodynamic(SPH) algorithm.In the penetrative stage the projectile was divided into standard Lagrangian finite element meshes,but the concrete was divided into SPH nodes.The finite element meshes of the projectile were converted into smooth particles before the calculation of detonations.Through the 2-D computations of the penetration-then-detonation to concrete target with projectile,the final volume of the crater at concrete target and the curve of pressure vs.time of the products and the curve of expanding velocity vs.time of warhead shell are obtained.