岩土工程学报2025，Vol.47Issue(12)：2488-2497,10.DOI:10.11779/CJGE20240111
太空环境下颗粒材料流动特性离散元分析:立柱坍塌试验
Discrete element analysis on granular material of flow mobility characteristics under the extraterrestrial environment:insight from column collapse test
摘要
Abstract
With the increasing interest of countries in deep space exploration,investigating the effect of extraterrestrial environment on the flow mobility and failure mode of granular column collapse,has a vital guiding significance for in-situ resource utilization,base site selection,and construction.This paper employs the discrete element method(DEM)to study the influence of van der Waals force on the flow mobility and failure mode of granular column collapse.Firstly,a complete three-dimensional contact model,considering the van der Waals force between particles,is used to study the flow mobility and failure mode of column collapse.Secondly,the granular column collapse tests under different Van der Waals forces are simulated using DEM.Finally,a contrastive analysis of van der Waals force influence on the flow mobility and failure mode of column collapse is performed.The simulation results show that,during the column collapse process,high granular velocity gradient,high granular rotational velocity,and sparse contact location distribution,have a positive correlation.Three failure modes of column collapse have been identified with the van der Waals force increased,which are the diffusive type,local type,and stable type.In the failure mode of diffusive type,the van der Waals force has little influence on the granular translational and rotational velocities,the flow mobility index,the energy conversion,and the ratio of energy dissipation.However,in the failure mode of local type,with the van der Waals force increased,the granular translational and rotational velocities,the flow mobility index,the energy conversion,and the ratio of energy dissipation decrease significantly.关键词
范德华吸引力/颗粒柱坍塌/离散单元法/流动特性/破坏模式Key words
Van der Waals force/granular column collapse/discrete element method/flow mobility/failure mode分类
建筑与水利引用本文复制引用
石安宁,蒋明镜,杨耿超,郭颂怡,王思远,林嘉禹..太空环境下颗粒材料流动特性离散元分析:立柱坍塌试验[J].岩土工程学报,2025,47(12):2488-2497,10.基金项目
国家自然科学基金重点项目(52331010) （52331010）
国家重大自然灾害防控与公共安全重点专项(2022YFC3003403)This work was supported by Key Project of the National Natural Science Foundation of China(52331010)and National Key Project for Prevention and Control of Major Natural Disasters and Public Security of China(Grant Nos.2022YFC3003403). （2022YFC3003403）
