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

作　　者：朱凼凼[1,2] 庞宝君[1] 陈海波[1] 贾斌[1] 

机构地区：[1]哈尔滨工业大学,哈尔滨150001 [2]中国空间技术研究院研究发展中心,北京100094

出　　处：《力学与实践》2012年第3期9-11,28,共4页Mechanics in Engineering

基　　金：国防科工局"十一五"空间碎片专题研究资助项目(KJSP08203)

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1.1～1.4km/s,前板损伤模式从花瓣式开裂转变为穿孔,当速度为1.4km/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1.95km/s时后板被击穿,导致防护结构受到破坏.In this paper,numerical impact experiments on spacecraft typical Whipple shield with silicate projectile 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.

关 键 词：低密度脆性 微流星体 撞击 防护结构 损伤效应 

分 类 号：V423.41[航空宇航科学与技术—飞行器设计] O347[理学—固体力学]