Study of Hypervelocity Breakup Phenomena for Arbitrary Material

对由特定、简单目标组成的航天器或天体进行了超高速撞击试验，对未来空间碎片环境的预测还需要进行更广泛、更详细的研究。我们开发了能够在GPGPU上运行的新的SPH和轨道计算代码。特别是不断增加的次级小碎片，即抛射物，是目前日益严重的问题，因此本研究可以进一步加快对难以计算的现象的研究。通过与实验结果的比较，发现这种现象高度依赖于质量的内部分布和冲击方向。

Hypervelocity impact tests have been conducted for spacecraft or celestial body composed of specific and simple target, and furthermore wider and detailed study is required for predicting future space debris environment. We developed new SPH and orbital computation code that are able to be run on GPGPU. Especially increasing secondary small debris called ejecta is becoming serious problem currently, hence this research enables to further accelerate investigation of the phenomena that have had difficulty in computation. Besides it is applicable for complex structure by comparing to experimental results, and it was found that the phenomena highly depends on internal distribution of mass and impact direction.