Research On Soft Landing Impact Of Multilevel Honeycomb Buffer And The Manned Lunar Flight

Benefiting from the competition between the United States and the Soviet union for space supremacy and explorations in the 50 s of last century, people began to have a good knowledge and deep understanding on the moon. The resources of the earth is difficult to meet the need of human development in the 21 st century,by which the main space powers had carried out a lot of moon exploration activities and announced to achieve the goal of manned lunar landing.In order to compete for the future of the legitimate rights and interests of the resources exploitation on the moon and promote the leap-forward development of science in our country, our country must implement the manned lunar landing.Manned lunar landing contains many key technologies,of which implement manned lunar flight safely has the top priority.On the basis of previous studies, this paper studied the manned spacecraft landing buffer especially the multilevel honeycomb buffer with the use of dynamic analysis software ANSYS- LSDYNA. The establishment of a manned lunar lander simplified structure and the soft landing shock response were analyzed and validated. On the basis of the validation, a new structure of manned lunar lander was designed in this paper and a simulation was carried out.The research content of this paper is divided into three parts: first, the detailed study of multilevel honeycomb buffer used on the manned moon landing craft was carried on. Firstly, we analyzed the cushioning property of two level honeycomb buffer and compared the results with existed research for verifying. Secondly, we studied the buffer performance of three level, four level and five level honeycomb buffer. Results showed that the buffer performance of three level honeycomb buffer is the best.On the basis of the study, full-scale manned lunar flight finite element model was established and simulated to analyze its acceleration response after impact to ensure that it was no more than the allowed overload of safe landing. The results compared with the existing research results verified the validity of the model. Then, this paper designed a new structure of manned lunar flight and simulated the landing on the flat surface of the moon. Results showed that the landing performance of the new structure was better than the old structure.Finally, manned lunar flight had to land in a certain slope surface some time considering the condition of the actual landing. The "1-2-1" soft landing mode and "2-2" soft landing mode of old structure manned lunar flight and new structure manned lunar flight is simulated. Results showed that the landing performance of the new structure manned lunar flight is superior to the old structure manned lunar flight in both modes. In addition, the "2-2" soft landing mode is better than "1-2-1" soft landing mode when landing on the slope. Finally, the acceleration response of the flight has a mutation when different leg landing on the moon, which we must notice to assure that it is no more than the allowed overload of manned lunar flight.