液体を用いたスペースデブリシールドの貫通限界速度

概要

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A space debris shield for use with spacecraft and satellites was designed. A space debris shield is required to have high defense performance and be lightweight. In this paper, the pressurized wall in the shield composition was made into a double wall structure, and we considered inserting a liquid layer into the shield between these walls. First, the numerical analysis conditions of aluminum alloys of shield composition materials were established from reverse analysis using the ballistic limit equation of a Whipple shield. Using the scaled-down liquid shield, the liquid layer thickness was investigated by comparing the numerical analysis and impact tests that used a two-stage light gas gun. Next, the ballistic limit curve of a real-size liquid shield was examined using the numerical analysis. From these results, it was found that the liquid layer in the debris shield substantially slowed the velocity of incoming debris fragments.