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Model Test Study on the Interaction between Compound Lunar Soil and the Footpad

Author: WuXiaoJun
Tutor: LingDaoSheng
School: Zhejiang University
Course: Geotechnical Engineering
Keywords: Synthetic lunar regolith Vertical impact Level of drag Model test
CLC: V416.8
Type: Master's thesis
Year: 2011
Downloads: 42
Quote: 0
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Abstract

With the gradual deepening of human space beyond Earth detection technology research, design requirements on the lander is getting higher and higher, and a high-security, versatile lander is essential. Lander landing process there is a huge impact, in order to ensure the internal precision instruments from being damaged, the lander to be able to secure a soft landing, the dynamic process of interaction in the footpad with lunar soil analysis is particularly important. The lander landing process in the four foot pads with lunar soil interaction process is very complex, one of the basic problems is the single foot to the impact of the interaction between the pad and the lunar regolith and slip interaction. This article will break down the problem to a vertical impact and horizontal sliding movement in both directions. According to the motion characteristics of the lander during landing, vertical impact model test device and the level of independent research and drag the test device. First lunar soil and commonly used analog Month soil's physical mechanics nature carried out a summarized, through indoor experiment to study the used herein synthesis month soil the basic physical mechanics nature, and with the lunar regolith carry out the comparison, synthesis month soil conducted the evaluation. Then use the two sets of devices, synthetic lunar regolith vertical impact and level of drag test conclusions with reference value, and the final design of the lander. The paper is organized as follows: 1 lunar exploration research background, the course of development of the space program at home and abroad, as well as the legs of the lander and buffer design research status. 2, access to domestic and international literature, summarizes the lunar soil brought back to Earth in the national space program and in all kinds of space research in the use of physical and mechanical properties of analog lunar regolith. 3, obtained through a series of laboratory experiments, a series of basic physical and mechanical properties of synthetic lunar soil used in this study, and the results of tests obtained with the lunar soil were compared to evaluate. Provide the basic parameters for the model test. Independently developed the vertical impact model test device, described in detail the composition of the test device, as well as to achieve the functionality. The set of devices the the synthetic lunar soil of different density, different impact velocities and impact quality of a large number of vertical impact test. Synthetic lunar regolith relative density, impact velocity and impact the quality of the footpad movement traits. Independently developed horizontal drag model test device, the details of the composition of the test device, as well as to achieve the functionality. The set of devices of different density synthetic lunar regolith, the the different piercing depth and the large number of different drag rate level drag test. The synthetic lunar regolith relative density drag rate as well as the penetration depth to footpad movement traits.

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