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Indexed by:期刊论文

Date of Publication:2022-06-29

Journal:航天返回与遥感

Volume:38

Issue:4

Page Number:55-63

ISSN No.:1009-8518

Abstract:The interaction between lunar lander and soil is of great importance due to the strong impact produced during the brief period of the space lander touchdown.In order to study the buffering effect of lunar soil material during lunar lander's soft landing process, this paper uses the discrete element method to establish the calculation model of lunar soil in view of the discrete distribution characteristics of lunar soil at the meso scale. Based on this, the lander model is simplified as a rigid body, and only the buffering performance of the landing legsis considered. The dynamic impact process of the landing is analyzed and the numerical simulation is carried out. By adjusting the quality and landing speed of the lander, the depth, acceleration and impact force of the lander are calculated and analyzed. The calculated results show that the lunar soil particles have a good buffering effect on the lander, which provides a new research direction for realizing security and stability of a soft landing. Using discrete element method to analyze the changes of impact force during the landing process, is helpful to the rational design and safety performance evaluation of the land structure.

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