航天器工程2012，Vol.21Issue(1)：18-24,7.
着陆冲击仿真月壤本构模型及有限元建模
Lunar Soil Constitutive Model and Finite Element Modeling for Landing Impact Simulation
梁东平 1柴洪友1
作者信息
- 1. 北京空间飞行器总体设计部,北京100094
- 折叠
摘要
Abstract
The purpose of this study is to construct finite element model of lunar soil for landing impact simulation of lunar lander.Based on the analysis of the known mechanical properties and tri-axial test data of lunar soil sample,it is found that lunar soil may exhibit shear-induced dilation at low confining pressure and plastic compression and strain hardening at high confining pressure.Cap Drucker-Prager（CDP） model is selected as the constitutive model of lunar soil according to the previous qualitative analysis,and the model parameters are calibrated quantitatively by test data of lunar soil or lunar soil stimulants.Finite element modeling and simulation analysis of lunar lander landing impact tests are conducted,the results indicate that calibration methods of model parameters are practical and reasonable.Dynamic response behaviors of lunar soil under landing impact condition can be accurately simulated by CDP model,and the model can be used for lunar soil finite element modeling.Parameters analysis of lunar soil model is conducted,and effects of parameters of lunar soil model on the landing performances of lunar lander are evaluated.关键词
月球着陆器/月壤/着陆冲击/帽盖德鲁克-普拉格模型/有限元建模Key words
lunar lander/lunar soil/landing impact/Cap Drucker-Prager model/finite element modeling分类
航空航天引用本文复制引用
梁东平,柴洪友..着陆冲击仿真月壤本构模型及有限元建模[J].航天器工程,2012,21(1):18-24,7.
