引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
过刊浏览    高级检索
本文已被:浏览 123次   下载 0  
分享到: 微信 更多
着陆器足垫冲击月壤动态行为离散元仿真分析
林云成
中国空间技术研究院总体部
摘要:
研究月面着陆机构与月壤的相互作用对着陆稳定性、安全性和着陆机构设计具有重要的意义。文章建立了具有角度的足垫冲击月壤的动态作用力学模型,并通过离散单元法分析了足垫在0-22°冲击角度和1-4m/s冲击速度下月壤的动态变化情况,得出了在冲击速度4m/s、冲击角度为0°时,冲击力最大为5080.6N;在竖向位移相同的情况下,冲击角度越大冲击力越小。另外,足垫冲击月壤角度越大对月壤的压实作用越小,其中22°时,前后孔隙率变化仅为26.5%。冲击角度一定时,速度越大对月壤的压实较滞后,而压实程度较大,冲击速度为4m/s时,前后孔隙率变化为78.1%。本文研究对着陆机构设计和着陆控制具有一定的参考意义。
关键词:  着陆器;足垫;冲击;离散元
DOI:
分类号:
基金项目:
Simulation Analysis of Dynamic Behavior of Landslide Footpad Impact Lunar Regolith
Lin Yuncheng
Abstract:
It is important to study the interaction between lunar landing mechanism and lunar soil for landing stability, safety and landing mechanism design. In this paper, a dynamic mechanical model of lunar soil impacted by footpads with angle is established, and the dynamic changes of lunar soil under0-22° impact angle and 1-4m/s impact velocity are analyzed by discrete element method. It is concluded that the maximum impact force is 5080.6N when the impact velocity is 4m/s and the impact angle is 0°, and the larger the impact angle is, the smaller the impact force is when the vertical displacement is the same. In addition, the bigger the angle of footpad impact on lunar soil, the smaller the compaction effect on lunar soil. The change of porosity before and after 22°is only 26.5%. When the impact angle is fixed, the higher the velocity, the later the compaction of lunar soil, but the greater the degree of compaction. When the impact velocity is 4 m/s, the change of porosity before and after the impact is 78.1%. The research in this paper has certain reference significance for the design of landing mechanism and landing control. Keywords: Lander;Footpad;Impact;Discrete element simulation
Key words:  Lander;Footpad;Impact;Discrete element simulation