航天器工程2017，Vol.26Issue(2)：45-52,8.DOI:10.3969/j.issn.1673-8748.2017.02.007
月壤钻取与整形过程中样品层理保持特性分析
Analysis on Stratification Retention Characteristics in Lunar Soil Drilling and Shaping Process
摘要
Abstract
A three-dimensional lunar soil particle contact model has been built using the discrete element method.This model includes the bending and twisting moment and equivalent gravity between any two lunar soil particles.The tri-axial simulation test has been used to calibrate the microscopic parameters of the model.The macroscopic mechanical properties of the model are the same with that of the true lunar soil.Simulations for the drilling process and shaping process are designed,and "stratified probability method" is proposed to analyze the lunar soil samples' stratification retention characteristics by the probability of particles in each layer to neighbored layers in the motion process.Simulation results show that in the lunar soil sampling process,the stratification information is destroyed twice,by drilling and shaping processes respectively,and the levels of the two processes are similar.The stratification information of the lunar soil sample more close to the surface is damaged more seriously.Stratified probability method can describe the sample stratification destruction of the lunar soil drilling and shaping process,and the analysis results have important reference value for the lunar soil sampling mechanism design.关键词
月壤采样/离散元模型/钻取过程/整形过程/层理保持特性Key words
lunar regolith/discrete element model/deep sampling/shaping process/stratification retention characteristics分类
航空航天引用本文复制引用
张利新,刘天喜,张鼐,王迎春,马亮..月壤钻取与整形过程中样品层理保持特性分析[J].航天器工程,2017,26(2):45-52,8.基金项目
国家自然科学基金(51605114,U1637208) （51605114,U1637208）
