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| 深空探测车单轮牵引性能的离散元仿真 | |
| 引用本文： | 李雯,高峰,贾阳,孙鹏.深空探测车单轮牵引性能的离散元仿真[J].北京航空航天大学学报,2008,34(5):524-528. |
| 作者姓名： | 李雯 高峰 贾阳 孙鹏 |
| 作者单位： | 北京航空航天大学交通科学与工程学院,北京,100083;中国空间技术研究院总体部空间科学与深空探测总体研究室,北京10094 |
| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
| 摘 要： | 利用离散元数值分析方法,对矩形、直角梯形和三角形截面轮齿车轮与土壤颗粒单元的相互作用进行仿真研究.分析细观尺度下,土壤颗粒单元受3种轮齿车轮扰动后的接触反力分布规律.采用坐标转换和代数求和的数学方法,建立细观离散元分析结果与宏观车轮牵引性能参数的对应关系,推导土壤推力、行驶阻力及其挂钩牵引力的表达式,以研究轮齿截面的几何形状对车轮牵引性能的影响.计算结果表明,在相同行驶环境下,直角梯形轮齿车轮具有最佳的牵引性能. |
| 关 键 词： | 深空探测车 牵引性能 通过性 离散单元法 |
| 收稿时间： | 2007-05-10 |
Numerical simulation of tractive performance for planetary rover vehicle wheel by discrete element method |
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| Li Wen,Gao Feng,Jia Yang,Sun Peng.Numerical simulation of tractive performance for planetary rover vehicle wheel by discrete element method[J].Journal of Beijing University of Aeronautics and Astronautics,2008,34(5):524-528. | |
| Authors: | Li Wen Gao Feng Jia Yang Sun Peng |
| Institution: | 1. School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China; 2. Division of Space Science and Deep Space Exploration, China Academy of Space Technology Institute of Spacecraft System Engineering, Beijing 100094, China; 3. School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
| Abstract: | The numerical simulation for wheel-soil interaction was conducted by discrete element method(DEM) where the grouser-sections of wheels were rectangle,rec-trapezia,and triangle respectively.The distribution of contact reaction for soil particles was analyzed in the granular scales when they are disturbed by different lugged-wheel configurations.The relationship between microscopic results of DEM and macroscopic parameters of tractive performance was built by means of coordinates transformation and algebraic summation.The formulae of soil thrust,motion resistance and drawbar pull were derived respectively in order to study the influence of grouser-section shape upon tractive performance of wheel.The calculated results show that the wheel with rec-trapezia-section grousers possesses the best tractive performance among the three kinds of lugged-wheel configurations in the same traveling condition. |
| Keywords: | planetary rover vehicle tractive performance trafficability discrete element method |
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