8km/s超高速撞击下的碎片云与Whipple结构损伤特性研究  

Study on Debris Cloud and Damage Characterization of Whipple Shield at Impact Velocity of 8km/s

作　　者：张品亮[1] 龚自正[1] 田东波[1] 武强[1] 曹燕[1] 宋光明[1] 陈川[1] 李明[2] ZHANG Pin-liang;GONG Zi-zheng;TIAN Dong-bo;WU Qiang;CAO Yan;SONG Guang-ming;CHEN Chuan;LI Ming(Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China;China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]北京卫星环境工程研究所,北京100094 [2]中国空间技术研究院,北京100094

出　　处：《空间碎片研究》2020年第3期37-42,共6页Space Debris Research

基　　金：国家重点研发计划(2017YFB0702000)。

摘　　要：本文基于8km/s超高速撞击实验和数值仿真开展了碎片云特性研究。实验在二级轻气炮上进行,获得了清晰的碎片云形貌图像,研究了不同直径弹丸超高速撞击对碎片云特性的影响规律。结果表明:实验与数值仿真结果一致,在撞击极限曲线和碎片云相态变化点7km/s前后,碎片云轴向和径向速度与t/D的关系规律不同。在撞击速度为8km/s时,弹丸直径越大碎片云主体结构的轴向速度和扩散速度就越大,对后墙造成的损伤程度和区域就越大。后墙中心损伤区域发生了明显的液化现象,后墙损伤模式为轴线上的鼓包和层裂剥落,后墙前表面损伤区域和后表面层裂剥落区域直径随着弹丸直径的减小而减小。最后,获得了防护结构的临界弹丸直径。In this paper,the characterizations of debris cloud are studied based on 8km/s hypervelocity impact experiments and numerical simulations.The experiments were carried out on a two-stage light gas gun,and a clear image of debris cloud morphology was obtained.The results show that the experimental results are consistent with the numerical simulation results.The relationships between the axial and radial velocities of the debris cloud and t/D are different,on both sides of the ballistic limit curve and the phase state transition velocity of the debris cloud at 7km/s.At impact velocity of 8km/s,the axial velocity and diffusion velocity of the debris cloud main structure increase with projectile diameter increasing,in other words,and the more damage to the rear wall.Obvious liquefaction occurred in the central damaged area of the rear wall.There are shot-line axis circularly arranged bulge and detached spall on the rear wall.The damage of rear wall became slighter as the diameter of projectile decreasing.Finally,the critical projectile diameter of shields is obtained.

关 键 词：碎片云 超高速撞击 空间碎片 防护结构 损伤特性 

分 类 号：V416[航空宇航科学与技术—航空宇航推进理论与工程]