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

doi:10.16182/j.issn1004731x.joss.19-0078

Abstract

Abstract: 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.

Key words: hypervelocity impact, material point method, ballistic limit, whipple shield

CLC Number:

O385

Li Yixiao, Wang Shengjie. Numerical Research on Ballistic Limit of Whipple Shield in High-Velocity Range[J]. Journal of System Simulation, 2020, 32(9): 1705-1710.

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