超高速撞击中靶后碎片云的内外边界方程研究

研究超高速撞击防护靶形成的碎片云的形状模型对航天器防护结构设计具有重要意义。文章用数值仿真的方法研究靶后碎片云的内外边界模型:将碎片云根据其材料来源分为靶板碎片云和弹丸碎片云,分别根据各碎片云的分布特点建立碎片云形状的内外边界方程;在双纽线边界方程的基础上,修正为由双纽线方程和圆弧方程组成的边界方程。对比整体碎片云的适用率表明,由双纽线方程和圆弧方程组成的边界方程比单一的双纽线边界方程描述碎片云实际分布更为贴合。

The inner and outer boundary equations of hypervelocity impacted debris cloud behind the shield

A better understanding of the behavior of the debris cloud model under the hypervelocity impact is important for designing the shield structure of spacecraft. In this paper, a numerical simulation method is proposed to study the inner and outer boundary model of the debris cloud. According to its origin, the debris cloud is classified into the target cloud and the projectile cloud. The inner and outer boundaries of the cloud shape are determined according to the distribution characteristics of each cloud. The curves of Bernoulli''s lemniscates are modified into a combination of lemniscates and circles. It is shown that the modified curves are more appropriate to fit the actual debris shape than the lemniscates.