| 月壤静力学特性的离散元模拟 |
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| 引用本文： | 邹猛,李建桥,贾阳,任露泉,李因武. 月壤静力学特性的离散元模拟[J]. 吉林大学学报(工学版), 2008, 38(2): 383-0387 |
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| 作者姓名： | 邹猛 李建桥 贾阳 任露泉 李因武 |
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| 作者单位： | 1. 吉林大学,地面机械仿生技术教育部重点实验室,长春,130022
2. 中国空间技术研究院,北京,100094 |
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| 基金项目： | 教育部科学技术研究重点项目(107035)，吉林大学“985工程”项目 |
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| 摘 要： | 以典型月壤的物理力学性质为参照标准,采用颗粒流程序PFC3D对月壤静力学特性进行了离散元模拟研究。通过离散元模拟三轴试验反复调整颗粒细观参数,建立了月壤离散元接触力学模型;描述了月面探测车辆行驶下的月壤承压特性模型与剪切特性模型;从月面探测车辆的行驶观点出发,模拟压板试验,得出了载荷-沉降关系;通过模拟履带板试验得出了剪切应力-位移关系。最后,计算出了月壤的变形模量K为1635 kN/mn+2、变形指数n为1.22,剪切变形模量k为1.35 cm。结果表明,模拟试验值与模型预测趋势一致。
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| 关 键 词： | 农业工程 月壤 剪切特性 承压特性 PFC3D |
| 文章编号： | 1671-5497(2008)02-0383-05 |
| 收稿时间： | 2007-05-10 |
| 修稿时间： | 2007-05-10 |
Statics characteristics of lunar soil by DEM simulation |
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| Zou Meng,Li Jian-qiao,Jia Yang,Ren Lu-quan,Li Yin-wu. Statics characteristics of lunar soil by DEM simulation[J]. Journal of Jilin University:Eng and Technol Ed, 2008, 38(2): 383-0387 |
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| Authors: | Zou Meng Li Jian-qiao Jia Yang Ren Lu-quan Li Yin-wu |
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| Abstract: | According to its physical mechanics properties,the statics characteristic of lunar soil is studied using DEM software PFC3D.The DEM contacting mechanics model of lunar soil was built by triax-test to adjust the particle micro parameters.The pressure-sinkage model and shear model of the lunar rover passing on lunar surface were described.Then the plate-sinkage-test was simulated to obtain the relationship between load and sinkage;and the shear-test was simulated to obtain the relationship between shear and displacement.Finally the terra-mechanics parameters of the lunar soil were calculated as:the deformation modulus K=1635 kN/mn 2,the sinkage exponent n=1.22 and the shearing strength displacement modulus k=1.35 cm.These values obtained by DEM simulation are close to that obtained by prediction model. |
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| Keywords: | agricultural engineering lunar soil shear characteristics pressure-sinkage characteristics PFC3D |
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