中文摘要：

针对着陆器在发射阶段会经历复杂而恶劣的动态环境，研究了发射阶段着陆器及关键机构收拢状态下的动力学特性。首先基于物理样机模型建立了着陆器、月球车、太阳电池帆板等机构的有限元模型；其次采用MSC．Patran／Nastran对上述着陆器整机模型进行了模态分析，研究了着陆器收拢状态下振动的固有频率及振型；最后，基于发射阶段运载火箭特定激励对着陆器整机特性进行了频响分析。研究结果表明，着陆器发射过程中，振动以着陆腿及太阳电池帆板弯曲振动为主，通过频响分析预测了着陆器收拢状态结构设计薄弱环节，研究结果可为着陆器结构改型及提高可靠性提供设计参考。

英文摘要：

Lunar lander will be in complex and severe dynamic environment during taking--ott stage. The dynamic characteristics of a lunar lander in stowing stage was studied herein. Firstly, the model of lunar lander and rover and solar panels were built. Secondly, the modal analysis of stowing lander was studied based on MSC. Patran/Nastran. The natural frequencies and the vibration modes of the stowing lander were given. Finally, frequency analysis on stowing model of the lunar lander was implemented in the excitation of rocket. The results show that the vibration modes of the lunar lander are mainly bending of landing legs and solar panels, and provide some scientific basis for reducing the structural vibration and improving the reliability of the lunar lander.