月壤水平推剪试验的离散元数值分析

发布时间：2018-01-14 04:00

本文关键词：月壤水平推剪试验的离散元数值分析　出处：《地下空间与工程学报》2016年03期 　论文类型：期刊论文

【摘要】：在未来的探月计划中,将进行月球基地的建设和月球资源的开发等活动,这些活动均涉及月壤开挖/开采问题,因此有必要研究月壤与设备间的相互作用。将月壤-设备相互作用简化为平板水平推剪过程,采用离散单元法模拟这一过程。考虑到月壤的颗粒形态及月球表面特殊的环境,将粒间抗转动作用和范德华力引入月壤微观接触模型,通过双轴压缩试验得到数值试样的强度指标。分别考虑月面环境、不考虑范德华力的月面环境、地面环境,对比分析了重力场和范德华力对水平推剪阻力、破坏面和能量消耗的影响。结果表明:随重力场增大,水平推剪阻力和能量消耗增加但不与重力场成正比,破坏面由圆弧面变为平直面;范德华力对水平推剪阻力和能量消耗影响很小,但使破坏面延伸范围更大。
[Abstract]:In the future lunar exploration project, development and other activities will be conducted on the lunar base construction and lunar resources, these activities are related to the lunar regolith excavation / mining problems, so it is necessary to study the interaction between the soil and the equipment. The equipment of lunar soil interaction is simplified as a flat horizontal push shear process, simulate the process by using the discrete element method. Considering the particle morphology and the surface of the moon lunar special environment, the intergranular anti rotation and van Edward force into the lunar soil micro contact model, the strength index of numerical sample. Considering the biaxial compression test respectively without considering the lunar environment, van Edward force of the lunar surface environment, ground environment. Comparative analysis of the gravity field and van Edward force on the horizontal push shear resistance, impact damage and energy consumption. The results show that with the increase of the gravity field, horizontal push shear resistance and increase energy consumption but not with heavy force field In direct ratio, the failure surface changes from the arc surface to the flat surface, and the fan Edward force has little influence on the horizontal push and shear resistance and energy consumption, but it extends the range of the failure surface to be greater.

【作者单位】：同济大学地下建筑与工程系;同济大学岩土及地下工程教育部重点实验室;
【基金】：国家杰出青年基金(51025932) 国家自然科学基金(51179128)
【分类号】：P184.5
【正文快照】： 1引言随着“嫦娥一号”卫星的发射,我国月面探测一期工程成功结束。目前,正在进行以月面软着陆探测和月面车巡视勘察为目标的月面探测二期工程,其中月面着陆器、月面车及其他宇航设备与月壤间的相互作用是重点研究内容。未来将进行永久月面基地的建设和月面资源的开发等活动,

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