单层及双层板的超高速碰撞试验(速度超过10km/s)的数值模拟

NUMERICAL SIMULATIONS OF HYPERVELOCITY IMPACT EXPERIMENTS AT VELOCITIES IN EXCESS OF 10 km/s INVOLVING SINGLE AND DOUBLE PLATES

文章介绍了在Sandia国家实验室所进行的3个精确控制的超高速碰撞试验,使用两种复杂的流体码即多维流体动力学代码CTH和平滑粒子流体动力学代码SPH,对该试验进行数值模拟。该试验用质量为克大小的飞片及球形射弹以大约10km/s的速度撞击薄铝板及钢板(厚度小于1cm)。并分析了碎片云动力学计算预示结果及这些试验中金属板的损坏。

Well-controlled hypervelocity impact experiments were numerically modeled using two sophisticated hydrocodes,the multi-dimensional hydrodynamics code CTH and the Smoothed Particle Hydrodynamics code(SPH)in Sandia National Laboratory(SNL).Impact velocities on the order of 10 km/s were applied to gram sized flier plates and spherical projectiles that struck thin(less than 1 cm)aluminum and steel plates.Computational predictions of the debris cloud dynamics and plate damage for these experiments were analyzed.