三层铝板结构高速撞击损伤与极限特性

利用二级轻气炮发射铝球弹丸，在真空环境下高速撞击双层铝板和三层铝板结构，研究撞击速度、板间距、铝板厚度对结构撞击损伤的影响。然后分析三层铝板结构的撞击极限速度，并与相同面密度的双层铝板结构的试验结果进行比较。结果表明，当面密度相同时，三层铝板结构比双层铝板结构具有更强的高速撞击防护能力，增加首层铝板厚度有助于提高三层铝板结构高速撞击防护性能，当第二层铝板位于首层铝板与舱壁中间位置时，三层铝板结构的高速撞击防护性能趋于最佳。

Damage and Ballistic Limit for Three Layer Aluminum Plate Structure Under High Velocity Impact

A two-stage light gas gun is used to launch Al-sphere projectiles impacting on two-layer aluminum plate structures and three-layer aluminum plate structures under the vacuum environment. The effects of impact velocity, plate space and plate thickness on damage of shield structures are studied. And then impact limit velocities of three-layer aluminum plate structures are analyzed, and compared with the experimental results of two-layer aluminum plate structures with the same area density. The results indicate that the protection performance of three-layer aluminum plate structures are stronger than two-layer aluminum plate structures. The increase in the thickness of the first layer aluminum plate helps to enhance the protection performance of three-layer aluminum plate structures with the same area density. When the second layer plate is located at the middle position of the space between first layer aluminum plate and rear wall, the protection performance of three-layer aluminum plate structures tends to be the best.