低密度脆性微流星体撞击航天器防护结构损伤效应研究

THE CHARACTERISTICS OF DAMAGE CAUSED BY IMPACT ON THE WHIPPLE SHIELD OF LOW-DENSITY BRITTLE MICRO-METEOROID

  • 摘要: 采用硅酸盐质弹丸模拟低密度脆性微流星体,开展了航天器典型Whipple 防护结构撞击实验研究,获得了低密度微流星体弹丸损伤模式和损伤规律,实验表明,当弹丸撞击速度在1.1~1.4 km/s,前板损伤模式从花瓣式开裂转变为穿孔,当速度为1.4 km/s 时后板鼓包头上出现裂纹;随着弹丸速度的进一步增加,后板出现剥落现象,并形成花瓣撕裂,当弹丸撞击速度达到1.95 km/s 时后板被击穿,导致防护结构受到破坏.

     

    Abstract: In this paper, numerical impact experiments on spacecraft typical Whipple shield with silicate pro-jectile as low-density brittle micro-meteoroids are carried out to obtain a low-density brittle micro-meteoroids' damage mode and damage law. It is shown that when the projectile impact velocity is between 1.1 km/s and 1.4 km/s, the front plate injury model changes from the petal-type cracking into the hole, when the speed is 1.4 km/s the cracks appear on the drum header. With the increase of the projectile speed, flakes occur on the back plate, and the petal-type crack is formed. When the projectile impact speed is 1.95 km/s, the back plate cracks into the hole, leading to the destruction of protective structures.

     

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