中文摘要：

利用二级轻气炮发射2017-T4铝球弹丸，高速正撞击5052铝网防护结构，模拟空间碎片对航天器防护结构的高速撞击作用，研究了铝网防护结构的高速撞击防护特性。在面密度相同的情况下，分析了影响铝网填充防护结构高速撞击防护性能的铝网尺寸效应及组合效应。实验撞击速度为2．90～4．95km／s，弹丸直径分别为3．97和6．35mm，撞击角为0°。实验结果表明：厚度为0．5mm的2A12铝板对高速撞击铝球的初次破碎能力优于相同面密度的5052铝网层，但作为填充介质，5052铝网层比2A12铝板具有更好的保护后板作用；在一定的丝径范围内，丝径越小，撞击防护效果越好；前网后板填充层比前板后网填充层具有更好的均匀破碎效果。

英文摘要：

The high-velocity normal impacts of space debris on bumper of spacecrafts were studied through a two-stage light gas gun launching 2017-T4 aluminum spheres to impact on 5052 aluminum mesh shield structure. The resist capability of aluminum mesh shield against high-velocity impact was discussed. For the same areal density, the size effect and arrangement effect on the protection perform- ance of the filled layer were analyzed. Impact velocities of Al-spheres were varied between 2. 90 and 4.95 km/s in this study. The diameters of projectiles were 3.97 and 6.35 mm respectively. The impact angle was 0°. The results indicated that the primary capability of the 2A12 aluminum plate comminu- ting projectile is better than that of 5052 aluminum mesh when the areal density is constant,but as the filled medium,the 5052 aluminum mesh layer provides better protection for the rear wall than 2A12 a- luminum plate. In a certain wire diameter range,the 5052 aluminum mesh with smaller wire diameter has better protection performance. A1 mesh-A1 plate filled layer can break up the projectile to a more uniform size than A1 plate-Al mesh filled layer.