Investigation On The Structure Design And Analysis For Lunar Lander

Lunar, the natural satellite of the earth, has been a focus of the space discovey again recently because of its abundant resource and high value in use. Lunar exploration is also one of the most important projects in china. March 1, 2009,"Chang'e 1"satellite impacted on the moon under control, which marks the first phase of China's lunar exploration project completed successfully, and the exploration activities is going to the second phase: the soft lunar landing and auto surface survey.The design of the lunar lander and the soft landing system is the basic of the lunar exploration, while the structure dynamic analysis is an importment approach for the designes. Based on the mission and flight procedure of the lunar lander, the constructions of the lunar vehicle and the soft landing system have been designed and analyzed in accordance with the general principles, requirements and process of design on lunar lander.At first, the detailed designs of the structures of the lunar vehicle and soft landing system have been given in accordance with the design requirement. Founded on the structure designed, the entire model of the lunar lander has been simplified reasonably, and the corresponding finite element model has been built in the software MSC.Patran. Then static analysis, modal analysis and frequency response analysis have been calculated in the software, in which the static analysis has been taken into the landing process, while the modal analysis and the frequency response analysis have been taken into the launch process (The landing gear has been placed in the fairing interior of the rocket.). The results of the calculations show that the designed structures of the lunar vehicle and soft landing system meet the strength and stiffness requirements at the course of work. Finally, the major environment features of the lunar surface and the corresponding simulation methods have been decribed. Then the applications of these methods in the landing impact tests of the lunar lander and the specific pilot programs have been given. The result of the study has actual guidance on structure design of lunar lander.