球形弹丸超高速斜撞击弹坑特性数值模拟

摘要

微流星体和空间碎片与航天器之间发生的超高速撞击是航天器在轨运行的重大威胁,近年来随着发射次数的增多,航天器的安全受到了越来越多的威胁,超高速撞击的现象受到了更多的重视.应用AUTODYN软件,采用Lagrange方法,对2A12的弹丸高速斜撞击5A06的单层板形成的弹坑特性进行数值模拟.首先将数值模拟结果与实验结果比较,验证模型的有效性,之后应用原有的计算模型对弹丸撞击速度与受撞击板上形成弹坑的特性进行相关研究.数值模拟的结果表明:在弹丸直径和弹丸撞击角度都固定的情况下,其形成弹坑的坑深与坑径会随撞击速度的变化而改变.%The super-high-speed impact between the micro-meteoroids and the space debris and the spacecraft is a major threat to the on-orbit of the spacecraft. In recent years, with the increase of the number of launches, the spacecraft's safety has been threatened more and more. The phenomenon of hypervelocity impact has received more attention. By using AUTODYN software and using Lagrange method, the crater characteristics of 2A12 projectile with high speed oblique impact 5A06 are simulated numerically. First, the numerical simulation results are compared with the experimental results to verify the validity of the model. Then the original calculation model is used to study the impact velocity of the projectile and the characteristics of crater formed on the impact plate. The numerical simulation results show that the pit depth and pit diameter of the crater will change with the impact velocity when both the projectile diameter and the projectile impact angle are fixed.