Whipple防护结构超高速撞击极限分析

Limit analysis for hypervelocity impacts on the whipple shields

空间碎片的超高速撞击可能导致航天器发生严重的损伤甚至灾难性的失效,由于近地轨道上空间碎片的增加导致航天器的安全受到严重威胁,必须设置防护结构予以防护。本文从动力学分析入手,初步建立超高速撞击时Whipple防护结构的撞击极限方程,得到了与撞击极限相关的参数以及参数之间的关系,为实验提供基础。本文方程得到的撞击极限曲线与已有方程的撞击极限曲线吻合较好。

Hypervelocity impacts of space debris can lead to failure of space vehicles. Because the population of dangerous debris particles in lower Earth orbit is growing, designing shielding structures for space vehicles is necessary. The present paper is devoted to a ballistic limit equation of Whipple shielding structure under hypervelocity impact. The problem is based on the dynamic mechanics analysis. The paper obtains the parameters related to the ballistic limit and the relationship along those parameters. The ballistic limit equation is easily applied to engineering works and gives the base to experiments. The ballistic curves are presented. It is found that the ballistic curves have good agreement with those obtained by existed ballistic limit equations.