模块化月球表层采样力学模型  

Mechanical model for lunar surface sampling based on modular theory

作　　者：吕嘉航 李谦[1] 胡定坤 罗浩天 邹欣悦 LYU Jiahang;LI Qian;HU Dingkun;LUO Haotian;ZOU Xinyue(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学环境与土木工程学院,成都610059

出　　处：《中国空间科学技术》2023年第2期63-72,共10页Chinese Space Science and Technology

基　　金：国家自然科学基金(11502034,42072344);四川省自然科学基金(月表采样对月壤物理力学性质的影响机理研究,2022NSFSC0991)。

摘　　要：因不受作业空间的限制,月球表层采样机具设计形式多样,为建模分析带来较大难度。为避免不同结构机具分析时重复建模,建立了一种模块化的月球表层采样力学模型。该模型将复杂的采样机具拆分成若干个基本面单元,基于朗肯土压力理论、最大抗剪强度理论和地基极限承载力理论对面单元在采样过程中的受力进行分析,组合各个面单元所受到的力获得复杂机具的力学模型。基于不同机具形式与贯入角度的模拟月壤贯入试验,对理论模型进行了试验验证,通过引入月壤密度沿深度的影响修正公式,将理论模型的误差率降低至8.2%。结果证明该力学模型和模块化理论可行,为后期月球表层采样机具的设计研发提供了参考。Not limited by the working space,there are various designs of lunar surface sampling devices,which brings great difficulty to establishing analysis model.In order to avoid duplicate modeling during the analysis of different structural tools,a modular mechanical model of lunar surface sampling was proposed.In this model,the complex sampling machine was divided into several basic surface units.The force of the surface unit in the sampling process was analyzed on the basis of Rankine's earth pressure theory,the maximum shear strength theory and the ultimate bearing capacity theory of foundation.And the mechanical model of the complex machine was obtained by combining the forces of each surface unit.The theoretical model was verified by penetration tests with different machine forms and penetration angles based on lunar soil simulant.The error rate of the theoretical model was reduced to 8.2%by introducing the effect correction formula of the lunar soil density along the depth.The results show that the mechanical model and modular theory are feasible,which provides a reference for the design and development of the lunar surface sampling tool in the future.

关 键 词：月球表层采样 力学模型 模块化理论 机土作用 模拟月壤 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计]