JLU-B系列模拟月壤及其与刚性履刺轮相互作用

发布时间：2018-04-25 15:04

本文选题：模拟月壤 + 承压特性　；参考：《吉林大学》2013年硕士论文

【摘要】：我国探月工程计划在2013年下半年首次开展着陆器就位探测与月球车巡视探测的联合探测。由于月面通过性较差，容易导致巡视器车轮深陷其中，并且造成严重打滑，所以了解月壤的物理力学性质以及巡视器车轮在其上面的通过性极为重要。本文在了解月壤粒径分布范围的基础上，采用辉南县境内的火山渣为原料制备了三种不同粒径分布的模拟月壤，对模拟月壤的粒径分布、颗粒比重、容重、含水率、孔隙比等物理力学性质进行了检验，并且与月壤的物理力学性质进行了比较，以月壤的紧实度为标准，对模拟月壤的整备方法进行了研究，总结出了针对不同紧实度的制备方法。将刚性履刺轮与模拟月壤的相互作用简化为垂直载荷-沉陷和剪切应力-位移两个独立的过程，，分别对模拟月壤的承压特性和剪切特性进行了研究，并且测量出了模拟月壤的承压和剪切特性参数。以沉陷量、滑转率、扭矩、挂钩牵引力、牵引效率为指标，通过室内轻型月壤-车轮土槽测试系统研究刚性履刺轮在不同紧实度下和不同轮上载荷的牵引通过性能。通过有限元仿真软件对月壤-车轮土槽牵引试验进行了仿真分析，并且对重力加速度对月壤-土槽牵引试验的影响进行了模拟和分析。该研究为巡视器地面力学试验及其仿真提供了标准和参考，对巡视器识别可靠路径、提高自主性能，有着重要的意义。
[Abstract]:In the second half of 2013, China's lunar exploration project plans to carry out the first joint exploration of the landing vehicle in position and the lunar rover patrol detection in the second half of 2013. Because of the poor transmissivity of the lunar surface, it is easy to cause the wheel of the patrol to be trapped in it and cause serious skid, so it is very important to understand the physical and mechanical properties of the lunar soil and the transmissivity of the patrol wheel on it. On the basis of understanding the distribution range of lunar soil particle size, three kinds of simulated lunar soil with different particle size distribution were prepared by using volcanic slag in Huinan County as raw material. The particle size distribution, particle specific gravity, bulk density and moisture content of simulated lunar soil were studied. The physical and mechanical properties such as void ratio are tested and compared with the physical and mechanical properties of lunar soil. Based on the compactness of lunar soil, the preparation method of simulated lunar soil is studied. The preparation methods for different compactness were summarized. The interaction between rigid wheel and simulated lunar soil is simplified as two independent processes of vertical load-subsidence and shear-stress-displacement. The bearing and shear characteristics of simulated lunar soil are studied respectively. The pressure and shear characteristics of the simulated lunar soil were measured. Based on the index of subsidence, slip rate, torque, hook traction force and traction efficiency, the traction performance of rigid stuffing wheel under different compactness and load on the wheel was studied by indoor light lunar soil-wheel soil trough test system. The influence of gravity acceleration on the traction test of lunar soil-soil trough is simulated and analyzed by finite element simulation software. The research provides the standard and reference for the ground mechanics test and simulation of the patrol, and it is of great significance to identify the reliable path and improve the autonomous performance of the patrol.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P184;V416

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