月基装备足垫-月壤水平拖曳力学模型  

Footpad-lunar soil horizontal dragging model of lunar-based equipment

作　　者：陈正翰 徐赵东[1] 杨建中[2] 于登云 CHEN Zhenghan;XU Zhaodong;YANG Jianzhong;YU Dengyun(School of Civil Engineering,Southeast University,Nanjing 210096,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]北京空间飞行器总体设计部,北京100094

出　　处：《华中科技大学学报（自然科学版）》2024年第8期16-20,40,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金重大项目(U2037602);长江学者奖励计划项目;腾讯“科学探索奖”资助项目。

摘　　要：针对高内摩擦角、低黏聚力月壤与月基装备足垫耦合作用机理不明的科学问题,本研究基于月壤的极限承载力理论对足垫在月壤中的水平拖曳过程进行了动力学分析.采用对数螺线和直线分别描述破坏区月壤的滑移面,根据极限土压力理论计算滑移线上微元体的月壤竖向压力和水平向压力,沿曲线积分得到滑移面上月壤的极限承载力.同时考虑足垫底部摩擦力和惯性力等因素,建立了足垫-月壤水平拖曳力学模型.对水平拖曳过程展开了离散元仿真,验证了理论模型中月壤滑移面形状的假设,并对各种拖曳速度下的月壤水平阻力进行了仿真与理论结果的对比分析.研究表明,提出的月基装备足垫-月壤拖曳力学模型的误差小于9%.Regarding the scientific issue of unclear coupling mechanism between the footpads and the lunar soil with high internal friction angle and low cohesion,the dynamic analysis of the horizontal dragging process of footpads was conducted based on the ultimate bearing capacity theory of lunar soil.The sliding surface of the lunar soil in the failure zone was described with logarithmic spiral and straight lines,and the vertical and horizontal lunar soil pressure of the microelement on the sliding line was calculated based on the theory of ultimate soil pressure.The ultimate bearing capacity of the lunar soil on the sliding surface was obtained by integrating the force of the microelement along the curve.At the same time,factors such as inertial force and the friction at the bottom of the footpad were also considered,and a footpad-lunar soil horizontal dragging mechanical model was established accordingly.The discrete element simulation was conducted according to the dragging process,and the shape of lunar soil's sliding surface assumed in the theoretical model was validated.For the lunar soil resistance at different dragging velocities,the theoretical results were compared with simulation results,and it demonstrates that the error of the proposed footpad-lunar soil horizontal dragging mechanical model is less than 9%.

关 键 词：月球探索 月球科研站 月基装备 月壤 接触力学 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计]