三种环境下月壤削坡试验离散元分析  

Distinct Element Analysis of The Lunar Soil Cut Slope Test Under Three Environmental Conditions

加关注

作  者:蒋明镜[1,2,3] 廖优斌 陈有亮[1] 奚邦禄 JIANG Mingjing;LIAO Youbin;CHEN Youliang;XI Banglu(School of Environment and Architecture,University of Shanghai for Science and Technology, Shanghai 200093,China;Key Laboratory of Geotechnical and Underground Engineering, Tongji University,Shanghai 200092,China;Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区:[1]上海理工大学环境与建筑学院,上海200093 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]同济大学土木工程防灾国家重点实验室,上海200092

出  处:《郑州大学学报:理学版》2019年第1期119-126,共8页Journal of Zhengzhou University:Natural Science Edition

基  金:国家自然科学基金项目(51579178).

摘  要:在未来的探月计划中的基地建设和资源开采等活动,不可避免地涉及月壤快速削坡过程.然而,月面环境与地球环境相差很大,比如低重力、高真空等,故而从地面环境得到的有关快速削坡的认知不可直接运用到月面环境.因此,有必要研究月面特殊环境对月壤快速削坡试验的影响.本文将颗粒间的抗转动作用和范德华力引入月壤微观接触模型,并植入到颗粒流软件(particle flowcode,PFC)中进行3种环境下(月面环境、不考虑范德华力月面环境、地面环境)月壤快速削坡试验模拟,对比分析了重力场和范德华力对快速削坡试验中流滑距离、坡后沉降及最终倾角的影响.结果表明:相对于地面环境,月面环境下得到的流滑距离和坡后沉降都偏小而最终倾角偏大,表明月面环境边坡更趋于稳定而不易发生滑坡;进一步分析表明,月面环境对快速削坡实验的影响主要是由月面环境下低重力场引起的,而高真空和高温差引起的范德华力的影响可以忽略不计.In the future lunar exploration,rapid cut slope process was essential for the construction of permanent lunar outpost and utilization of lunar resources.The existing knowledge about rapid cut slope obtained on the earth cannot be applied to the moon directly because of the unique lunar environment.The low-gravity level,high-vacuum and extreme temperature difference between day and night were totally different from earth environment.Hence,it was necessary to investigate the effects of the unique lunar environment on the lunar soil cut slope mechanism.A new microscopic model for lunar soil was employed to simulate the sliding process of a lunar slope with PFC in three environmental conditions(i.e.the lunar environment,the lunar environment without van der waals forces and the earth environment).This model could take the rolling resistance and van der waals forces into consideration to account for the particle shape and the unique lunar environment.The effects of gravity level and van der waals forces on the flow distance,slope settlement,and stable slope angle were analyzed.The results showed that the flow distance and the slope settlement in the lunar environment were smaller than those in the earth environment,while the stable slope angle in the lunar environment was larger than that in the earth environment,which implied that the same slope on the moon was more stable.Further analysis showed that the low gravity on the moon had significant effects on the cut slope test,while the van der waals forces due to the high-vacuum and extreme temperature difference could be ignored.

关 键 词:月壤 离散单元法 切坡 抗转动作用 范德华力 

分 类 号:TU43[建筑科学—岩土工程;建筑科学—土工工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象