基于模拟月壤的轮壤关系研究
发布时间：2019-01-30 11:31
【摘要】： 月面环境下松软月壤是月球车车轮滑转、下陷而停滞不前的主要原因。因此,研究驱动轮与月壤间相互作用方式及其变化规律,对于提高月面探测车辆的通过性,从而保障月球车工作的可靠性具有重要意义。 本文以火山灰和石英砂为主要原料制备了三种用于月面车辆试验用模拟月壤,利用研制的月壤—车轮土槽测试系统,对五种不同结构的月球车驱动轮在三种不同介质上的牵引特性进行对比试验,并分析不同车轮结构下模拟月壤的破坏失效形式、不同介质破坏形式、轮刺坑形状以及介质和车轮结构对车轮牵引性能的影响规律。分析了原始状态下模拟月壤圆锥指数(CI)分布情况,探究载荷及整备条件对CI值的影响规律,提出试验前模拟月壤一致性处理方法,在此基础上进行了被试刚性轮压痕试验和车轮压实土槽试验,根据车轮压痕面积、压痕深度以及车轮结构参数和行驶参数探讨车轮对模拟月壤CI值的影响,并计算了车辆圆锥指数作为评价月球车整车通过性指标和土壤—车轮系数作为评价月壤可行驶性指标。采用离散元方法细观分析了微重力环境下月壤力学参数变化对贯入阻力的影响规律和驱动轮结构参数,包括轮径、轮刺高度、轮刺宽度和轮刺数量对牵引性能的影响规律,并建立了车轮与模拟月壤相互作用有限元与离散元多尺度计算模型,在保证模拟精度的基础上,探讨提高模拟程序运算效率的途径。 以上研究为月面探测车辆的驱动轮设计优化、模拟月壤一致性处理、原理样机通过性验证试验场地整备提供基础数据和测试方法。
[Abstract]:The soft lunar soil is the main reason for the rover wheel skidding, subsidence and stagnation under the lunar surface environment. Therefore, it is of great significance to study the mode of interaction between the driving wheel and the lunar soil and its variation law in order to improve the transmissivity of the lunar surface detection vehicle and ensure the reliability of the lunar rover. Using volcanic ash and quartz sand as main raw materials, three kinds of simulated lunar soil for lunar vehicle test were prepared in this paper, and the lunar lool-wheel soil trough test system was developed. The traction characteristics of five kinds of lunar rover driving wheels with different structures on three different media were tested, and the failure modes of simulated lunar soil under different wheel structures were analyzed, and the failure modes of different media were analyzed. The influence of the shape of the wheel pit, the medium and the wheel structure on the traction performance of the wheel. In this paper, the distribution of conical index (CI) of simulated lunar soil under the original condition is analyzed, the influence of load and preparation conditions on CI value is explored, and the method of treating the consistency of simulated lunar soil before experiment is put forward. On this basis, the indentation test of rigid wheel and the soil groove test of wheel compaction were carried out. According to the indentation area, indentation depth, wheel structure parameters and driving parameters, the influence of wheel on the CI value of simulated lunar soil was discussed. The vehicle cone index was calculated as the evaluation index of the vehicle passing performance and the soil-wheel coefficient as the evaluation index of the lunar soil drivability. The influence of mechanical parameters of lunar soil on penetration resistance in microgravity environment and the influence of driving wheel structure parameters, including wheel diameter, height, width and number of spurs, on traction performance were analyzed by discrete element method. The finite element and discrete element multiscale calculation models of the interaction between the wheel and the simulated lunar soil are established. On the basis of ensuring the simulation accuracy, the way to improve the efficiency of the simulation program is discussed. The above research provides the basic data and test method for the design optimization of the driving wheel of the lunar surface detection vehicle, the simulation of the lunar soil consistency treatment and the preparation of the principle prototype through the test site verification.
【学位授予单位】：吉林大学
【学位级别】：博士
【学位授予年份】：2010
【分类号】：P184.5
本文编号：2418086
[Abstract]:The soft lunar soil is the main reason for the rover wheel skidding, subsidence and stagnation under the lunar surface environment. Therefore, it is of great significance to study the mode of interaction between the driving wheel and the lunar soil and its variation law in order to improve the transmissivity of the lunar surface detection vehicle and ensure the reliability of the lunar rover. Using volcanic ash and quartz sand as main raw materials, three kinds of simulated lunar soil for lunar vehicle test were prepared in this paper, and the lunar lool-wheel soil trough test system was developed. The traction characteristics of five kinds of lunar rover driving wheels with different structures on three different media were tested, and the failure modes of simulated lunar soil under different wheel structures were analyzed, and the failure modes of different media were analyzed. The influence of the shape of the wheel pit, the medium and the wheel structure on the traction performance of the wheel. In this paper, the distribution of conical index (CI) of simulated lunar soil under the original condition is analyzed, the influence of load and preparation conditions on CI value is explored, and the method of treating the consistency of simulated lunar soil before experiment is put forward. On this basis, the indentation test of rigid wheel and the soil groove test of wheel compaction were carried out. According to the indentation area, indentation depth, wheel structure parameters and driving parameters, the influence of wheel on the CI value of simulated lunar soil was discussed. The vehicle cone index was calculated as the evaluation index of the vehicle passing performance and the soil-wheel coefficient as the evaluation index of the lunar soil drivability. The influence of mechanical parameters of lunar soil on penetration resistance in microgravity environment and the influence of driving wheel structure parameters, including wheel diameter, height, width and number of spurs, on traction performance were analyzed by discrete element method. The finite element and discrete element multiscale calculation models of the interaction between the wheel and the simulated lunar soil are established. On the basis of ensuring the simulation accuracy, the way to improve the efficiency of the simulation program is discussed. The above research provides the basic data and test method for the design optimization of the driving wheel of the lunar surface detection vehicle, the simulation of the lunar soil consistency treatment and the preparation of the principle prototype through the test site verification.
【学位授予单位】：吉林大学
【学位级别】：博士
【学位授予年份】：2010
【分类号】：P184.5
【引证文献】
相关会议论文 前1条
1 谭松成;段隆臣;高辉;;重力环境对月壤三轴模拟试验结果的影响分析[A];颗粒材料计算力学研究进展[C];2012年
相关博士学位论文 前1条
1 赵志萍;一种新型月球车行走系统相关技术及实验研究[D];哈尔滨工业大学;2010年
相关硕士学位论文 前5条
1 卢智利;蚶类表面形貌磨料磨损行为的试验与仿真研究[D];吉林大学;2011年
2 刘天喜;浅层月壤采样过程的机土耦合作用研究[D];哈尔滨工业大学;2011年
3 刘琳琳;月球车轮壤系统仿真分析[D];吉林大学;2012年
4 王伟;月球车仿叶轮式半步行轮设计[D];大连理工大学;2012年
5 陈光明;基于四种耐磨生物体表形貌的仿生结构磨损行为离散元模拟[D];吉林大学;2012年
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