月球探测车轮土交互作用实验设计与仿真分析
首发时间:2007-11-28
摘要:为了研制适合月面的车轮结构、提高月球车的牵引通过性和工作可靠性,需要解决车轮与月壤的交互作用这一关键问题。月壤颗粒细小,容易打滑,月球探测车在月壤上运行容易发生下陷而无法前进。针对月球探测车的设计需要,以月壤的力学特性作为参考依据,对车轮行走试验所用的模拟月壤进行了初步配制,研制了行星探测车行走性能试验台,设计了实验方案。充分考虑月壤的离散特性,运用基于散体力学的离散单元法对车轮与土壤的交互作用进行了数值分析,对轮齿高度和轮齿数目对车轮牵引性能的影响进行了讨论。
关键词: 月球车 轮土交互作用 模拟月壤 土槽试验台 离散单元法
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Experiment design and simulation analysis of interaction between wheel of lunar rover and simulant regolith
Abstract:A fundamental problem concerning the wheel structure design for lunar vehicles is to enhance the tractability and working reliability, which is largely determined by a well understanding of the interactions between wheel and lunar regolith. Since lunar regolith particles are thin and easy to skid, lunar rover is readily sunk and hence fails. According to the design requirements and mechanics performance of lunar regolith, we primarily develop the lunar regolith needed for wheel travel test, and design a test-bed for planetary rover travel performance. Considering lunar regolith’s discrete characteristics, we performed numerical analysis on the interactions between wheel and regolith using discrete element method based on mechanics of granular media. Further discussions are made upon the various influences on the traction performance of wheels, which are induced by the increasing of lug height and lug number.
Keywords: lunar rover wheel-soil interaction simulant regolith soil bin test-bed discrete element method (DEM)
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