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.
2012, Vol. 31 
