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Position: Home > Articles > Research on the Interaction between Lunar Rover Wheel and Lunar Soil by Simulation Transactions of the Chinese Society for Agricultural Machinery 2008,39 (4) 7-10+29

月球车轮与月壤相互作用动力学模拟

作  者：
李建桥;邹猛;贾阳;任露泉;李因武
单  位：
中国空间技术研究院;吉林大学地面机械仿生技术教育部重点实验室
关键词：
地面力学;离散单元法;刚性轮;月壤
摘  要：
在分析月球车轮与月壤相互作用的基础上,应用离散元软件PFC2D对月球车轮在月壤上的牵引通过性能进行了模拟研究。通过双轴试验调整离散元力学模型的细观参数,得到月壤离散元接触力学模型:其内摩擦角为42°,凝聚力为1.554kPa,泊松比为0.41,弹性模量为77.5MPa;通过颗粒与月球车轮接触的平均刚度,确定了车轮前进时的水平速度与沉降速度增量;在相同试验条件下,模拟试验与土槽试验的对比结果表明,两者趋势一致;有轮刺轮与光滑轮的牵引通过性能对比结果表明,在没有牵引阻力情况下,有轮刺轮滑转率为零,光滑轮滑转率为1.8%;当滑转率为10%时,光滑轮挂钩牵引力为7.71N,有轮刺轮挂钩牵引力为121.6N。
译  名：
Research on the Interaction between Lunar Rover Wheel and Lunar Soil by Simulation
作  者：
Li Jianqiao1 Zou Meng1 Jia Yang2 Ren Luquan1 Li Yinwu1(1.Jilin University 2.China Academy of Space Technology)
关键词：
Vehicle-terramechanics,DEM,Rigid wheel,Lunar soil
摘  要：
Based on the analysis of FEM(finite element method)and DEM(discrete element method),the research considered that the DEM is feasible and superior to the FEM in simulating the interaction between wheel and the lunar soil.The model of the interaction between rigid wheel and lunar soil has been set up.The system of soil bin was simulated by means of software PFC2D.Parameters of the lunar soil for DEM model were confirmed in the biax test,and the angle of internal friction was 42°,the cohesion was 1.554 kPa,the Poisson radio was 0.41,and the Young's modulus was 77.5 MPa.The DEM model of the slip,sinkage,and draw-bar pull were found,which were checked out by the soil bin test.The results showed that the trend is consistent.Finally,the traffic ability of nonrug-wheel and the rug-wheel were compared,and the results showed that the slip radio was zero of the rug-wheel and was 1.8% of the nonrug-wheel under the tractive resistance was zero,and the draw-bar pull was 121.6 N of the rug-wheel and was 7.71 N of the nonrug-wheel,when the clip ratio is 10%.

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