足垫垂直冲击月壤理论模型研究  

Research on Theoretical Model of Vertical Impact of Foot Pad on Lunar Soil

作　　者：武士轻[1] 王永滨[1] 候绪研 薛萍萍[2] 龙龙 WU Shiqing;WANG Yongbin;HOU Xuyan;XUE Pingping;LONG Long(Beijing Institute of Space Mechatronics and Electricity,Beijing 100094,China;School of Mechatronics Engineering Mechanics,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]北京空间机电研究所,北京100094 [2]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《载人航天》2020年第2期135-141,共7页Manned Spaceflight

基　　金：载人航天预先研究项目(040202)。

摘　　要：为分析足垫冲击月壤运动特性,基于岩土力学理论,细化了足垫月面冲击环节,构建了足垫垂直冲击月壤的理论模型,可以快速预测足垫与月壤的相互作用特性;开展了离散元仿真验证,提取了着陆缓冲过程中冲击响应时间、足垫侵入月壤深度、轴向力及着陆过载等动力学特征参数;对比了不同着陆速度、不同足垫质量冲击工况下,离散元仿真与理论模型的计算结果。研究表明:理论模型可以反映足垫冲击月壤的运动特性及力学特性,与仿真计算误差在15%以内:理论模型在分析足垫冲击月壤时,可以代替离散元仿真分析,用于指导方案设计,具有工程实用价值。To analyze the movement characteristics of lunar soil impacted by foot pad cushion,a theoretical model of the vertical impact of the foot pad on the lunar soil was built based on the theory of geotechnical mechanics and by refining the impact of the lunar surface on the foot pad.To verify the practical value of the theoretical model,a discrete element simulation verification was carried out.The dynamic characteristic parameters such as the impact response time,the depth of foot pad invading lunar soil,the axial force and the landing overload were extracted during the landing buffer process.The calculation results of discrete element simulation and theoretical model were compared under different landing speeds and different foot pad mass impact conditions.The results showed that the theoretical model could reflect the motion characteristics and mechanical characteristics of the foot pad impacting the lunar soil.There was an error for the simulation calculation,but the error was within 15%.It is believed that the theoretical model could replace the discrete element simulation analysis in analyzing the impact of the foot pad on the lunar soil.It could be used to guide the design of related schemes and has practical engineering value.

关 键 词：垂直冲击 理论模型 月面探测 特征参数 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计]