不锈钢网/铝板多冲击防护屏高速撞击防护性能实验研究

 通过对铝Whipple防护结构进行扩展变形，设计出不锈钢网/铝板组合多冲击防护屏，并利用二级轻气炮对其进行高速撞击实验，撞击速度为3.93~4.25 km/s，弹丸直径为6.35 mm。分析了不同规格不锈钢网、不同间距组合以及网格间结膜对不锈钢网/铝板多冲击防护屏高速撞击防护性能的影响。结果表明：不锈钢网位于防护屏的最后层有利于碎片云的扩散；不锈钢网位于防护屏最前层不利于撞击粒子的初次破碎；丝网几何参数、防护层间距组合是提高不锈钢网/铝板多冲击防护屏高速撞击防护性能的重要参数；网格间结膜有助于弹丸撞击动能的吸收。

Experimental Investigation on Resist Capability of Stainless Steel Mesh/Al Multi-Shock Shield by High-Velocity Impact

Stainless steel mesh/Al multi-shock shield was designed by improving Al Whipple shield,and a series of high-velocity impact experiments were conducted by a two-stage light gas gun facility.Impact velocities of Al-spheres varied between 3.93 km/s and 4.25 km/s.The diameter of projectiles was 6.35 mm.For the different shield configurations with the same stainless steel mesh,the same shield configurations with different stainless steel mesh and the filmed stainless steel mesh shield configurations,the structure and material factors affecting on performance of shield were analyzed.The results indicated that when the stainless steel mesh wall was located in the last wall site of the bumper,it could help dispersing debris clouds,reducing the damage of the rear wall.At the same time,when the stainless steel mesh wall was located in the first wall site of the bumper,it did not help comminuting and decelerating projectile.The mesh opening size,wire diameter and separation distance arrangement were the important factors to enhance the protection performance of shields.The filmed stainless steel mesh helped in weakening the kinetic energy of debris cloud.