光滑粒子模拟方法在超高速碰撞现象中的应用

Applications of the smoothed particle hydrodynamics method to hypervelocity impact simulations

1.
College of Science, National University of Defense Technology, Changsha 410073, Hunan, China

摘要: 简要介绍了基于黎曼解的光滑粒子法,并将改进的SPH方法应用于超高速碰撞，对二维轴对称条件下的弹丸超高速碰撞薄板问题进行了数值模拟，研究了靶板厚度、弹丸速度、弹丸形状等因素对形成碎片云的影响。通过与实验数据比较，该算法模拟的碎片云的形状及特征与实验相吻合，验证了光滑粒子法对冲击动力学问题数值模拟的有效性。
- 爆炸力学 /
- 碎片云 /
- 光滑粒子流体动力学 /
- 超高速碰撞 /
- 黎曼解
Abstract: A smoothed particle hydrodynamics (SPH) algorithm based on the Riemann solution has been presented in this paper. The improved SPH algorithm is applied to simulate the 2D axisymmetrical impact of projectiles on thin target plates. The effects of plate thickness, projectile shape and impact velocity on the debris clouds have been studied. The characteristics of the simulated debris clouds are in agreement with the experimental results, which show that SPH method is effective in modeling the hypervelocity impact problems.
- mechanics of explosion /
- debris cloud /
- smoothed particle hydrodynamics /
- hypervelocity impact /
- Riemann solution