摘要
为考察空间碎片对航天器光学材料的影响,将光学材料撞击损伤与具体撞击碎片相对应,采用激光驱动飞片技术进行空间碎片地面模拟。设计了能形成速度可控的具体撞击碎片的激光驱动飞片装置,针对空间碎片不同速度和形态,通过改变激光能量和光束直径获得具有不同速度和长径比的飞片。研究了石英玻璃撞击损伤特征与飞片速度、长径比等参数的对应关系。结果发现:随着激光能量的增加,飞片速度的增加,撞击坑的损伤面积和坑深表现为先增大后减小;随着飞片长径比的减小,主要撞击损伤特征逐渐由侵彻成坑转变为溅射污染。通过碎片群平均参数改进为具体碎片参数,提高了地面模拟的有效性,利于高通量空间碎片环境中材料服役行为评价的研究,对空间碎片地面模拟技术和撞击损伤效应有一定的参考价值。
In order to investigate the influence of space debris on spacecraft optical materials and realize one-toone match between the impact damage of optical materials and the specific impact debris,the laser driven flyer technology was used for ground simulation of space debris.The laser-driven flyer system which could form the certain flyer with the speed controlled was designed.According to the different velocity and shape of space debris,the flyers with different speed and aspect ratio were obtained by adjusting the laser energy and the beam diameter.The corresponding relationship between the impact damage characteristics of quartz glass and the flyer parameters including velocity and aspect ratio was studied in this paper.The results showed that with increasing laser energy,the velocity of flyer increased,which resulted in an increase initially and decrease afterwards of the damage area and depth of the impact crater.With aspect ratio decrease,the primary characteristics of impact damage had been turned from penetration pit into sputtering pollution.The improvement of debris parameters from mean value to specific value increases the effectiveness of ground simulation,which is beneficial to the high-throughput analysis of materials service behavior under space debris.The research result has reference value and guidance significance to the space debris ground simulation technology and the impact damage effect.
出处
《上海航天》
2016年第5期119-124,共6页
Aerospace Shanghai
基金
国家自然科学基金资助(41274191)
关键词
空间碎片
地面模拟技术
光学材料
激光驱动飞片
撞击损伤
侵彻成坑
溅射污染
飞片速度
飞片长径比
Space debris
Ground simulation technology
Optical materials
Laser driven flyer
Impact damage
Penetration pit
Sputtering pollution
Velocity of flyer
Aspect ratio of flyer
