摘要
针对我国月球探测二期工程中将会遇到的月面软着陆任务，分析探测器的着陆冲击力学环境。提出一种适用于探测器方案设计阶段的着陆冲击力学环境预示方法：利用探测器着陆稳定性试验中测得的缓冲机构作用力作为激励，采用有限元方法求解系统的动力学响应；采用加速度响应的冲击响应谱描述探测器着陆冲击力学环境；用响应谱的包络加上一定的安全系数来确定探测器着陆冲击的最大期望环境。对某探测器的具体分析表明：由于着陆缓冲机构的缓冲特性，软着陆冲击力学环境的能量主要集中在接近准静态的低频段，而在高频段没有比运载发射阶段力学环境更严酷。因此在低频段需要设计专门的试验标准来考核设备。
Abstract
For the purpose of the mission of soft landing in the second lunar probe of China, a research on landing impact dy¬namic environ¬ment for lunar lander was carried out. The characteristics of the excitation loads were obtained by analyzing the force data col¬lected in the stability experimentation. According to the characteristics of the excitation loads, finite element method was employed to calcu¬late the struc¬tural response. Shock response spectra was used to describe the impact dynamic environment, and maximum expected envi¬ronment was formulated by adding a safety factor to the wrap of the spectrum. The results show that the dynamic environment during soft landing stage is not severer than during other stages in the frequency band above 10Hz, which indicates that the design of the buffer¬ing system is appropriate. The amplitude of the response blow 10Hz is large, so special test should be implemented in this fre¬quency domain.
关键词
月球探测器 /
着陆冲击 /
冲击响应谱 /
力学环境
{{custom_keyword}} /
Key words
lunar lander /
landing impact /
shock response spectra /
dynamic environment
{{custom_keyword}} /
赵俊锋;刘 莉;周思达;杨 武.
月球探测器软着陆冲击力学环境研究[J]. 振动与冲击, 2012, 31(3): 37-42
ZHAO Jun-feng;LIU Li;ZHOU Si-da;YANG Wu.
Dynamic environment research of soft landing for lunar lander[J]. Journal of Vibration and Shock, 2012, 31(3): 37-42
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(1759 KB)
