Whipple防护结构高速区弹道极限数值模拟研究  

Numerical Research on Ballistic Limit of Whipple Shield in High-Velocity Range

作　　者：李依潇 王生捷[1] Li Yixiao;Wang Shengjie(Beijing Institute of Mechanical Equipment,Beijing 100854,China)

机构地区：[1]北京机械设备研究所,北京100854

出　　处：《系统仿真学报》2020年第9期1705-1710,共6页Journal of System Simulation

摘　　要：受二级轻气炮发射速度的限制,在以往研究中极少进行弹体速度大于8 km/s的Whipple防护结构撞击试验,导致建立高速区弹道极限方程所依据的实验数据并不能完全反映Whipple防护结构在高速区的防护能力。通过将GRAY三相物态方程代入自编物质点法计算程序,对厚靶侵彻、Whipple防护结构高速区撞击等工况进行数值模拟,得到Whipple防护结构在高速区的弹道极限,仿真结果表明其高速区防护能力高于弹道极限方程的预测,对航天器防护结构的设计具有参考价值。Limited by the acceleration ability of two-stage light gas guns, few hypervelocity impact experiment of Whipple shield with projectile speed higher than 8 km/s has been performed. The ballistic limit equations can’t fully describe the protection ability of Whipple shield in high-velocity range because of the lack of experimental data. GRAY three-phase equation of state is used in the material point method calculation program to simulate the penetration of thick target plate and the high-velocity impact of Whipple shield. The numerical result of Whipple shield ballistic limit shows that the ballistic limit in high-velocity range is higher than the forecasting of traditional ballistic limit equations. This result is valuable for the design of spacecraft protection structure.

关 键 词：超高速碰撞 物质点法 弹道极限 WHIPPLE防护结构 

分 类 号：O385[理学—流体力学]