月壤表取采样过程离散元仿真分析平台研究

发布时间：2018-06-25 00:37

本文选题：月壤 + 表取采样　；参考：《计算机仿真》2013年12期

【摘要】：在月球表取采样系统优化设计的研究中,月球表取采样系统的设计需要计算采取月壤的质量以及采样过程中易受到月壤阻力的影响,进而确定系统储备的功率大小以及是否能够达到采样的目标。月壤属于散体材料,在采样过程中形态和力学特性不断变化,连续介质力学和经典土力学理论将研究对象作为一个整体,只能解决极限平衡状态下的受力问题,不能处理散体材料大变形和连续变形的问题。为解决上述问题,提出运用三维离散元方法对月壤的采样过程进行数值仿真,建立月壤的物理力学模型以及不同采样机具的参数模型,在地球环境下对仿真结果进行验证,然后利用上述模型在月球环境下进行仿真和分析,得出低重力环境对采样过程的影响结果。离散元仿真分析平台可以为实际的月壤表取采样方案确定、采样机具结构设计、采样机具动力设计等提供重要的参考和依据。
[Abstract]:In the study of the optimal design of lunar surface sampling system, the design of lunar surface sampling system needs to calculate the quality of lunar soil and the resistance of lunar soil in the sampling process. Furthermore, the reserve power of the system is determined and the target of sampling can be achieved. Lunar soil is a bulk material, and its morphology and mechanical properties are constantly changing during the sampling process. Continuum mechanics and classical soil mechanics theory take the research object as a whole and can only solve the stress problem under the limit equilibrium state. The problem of large deformation and continuous deformation of bulk materials cannot be dealt with. In order to solve the above problems, a three-dimensional discrete element method is proposed to simulate the sampling process of lunar soil. The physical and mechanical models of lunar soil and the parameter models of different sampling machines are established, and the simulation results are verified under the earth environment. Then the model is used to simulate and analyze the lunar environment, and the effect of low gravity environment on the sampling process is obtained. The simulation and analysis platform of discrete element can provide important reference and basis for the determination of sampling scheme of lunar soil table, the structure design of sampling machine and the dynamic design of sampling machine and so on.
【作者单位】：中国地质大学(武汉)工程学院;北京空间飞行器总体设计部;
【基金】：国家自然科学基金项目(51204151) 中央高校基本科研业务费专项资金资助项目(CUGL120243)
【分类号】：P184.5

【相似文献】