微流星及空间碎片的高速撞击威胁着航天器的安全运行 ,导致其严重的损伤和灾难性的失效 .本文给出和分析了柱状弹丸在第一门槛值速度区间正撞击铝合金单防护屏防护结构实验研究的结果 .结果表明 :单防护屏防护结构在此速度区间受柱状弹丸正撞击其损伤是比较严重的 ,并得到了柱状弹丸撞击防护结构损伤的特点和规律 The high-speed impact of the micro-meteors and space debris threatens the safe operation of the spacecraft, leading to serious damage and catastrophic failure.This paper presents and analyzes the protective effect of single-screen protective aluminum shield being hit by the first threshold velocity range The results show that the structure of the single shield is more serious in this speed range when the column projectile collides with the projectile, and the characteristics and rules of the damage of the column projectile impact structure are obtained