【摘要】： 月面環(huán)境下松軟月壤是月球車(chē)車(chē)輪滑轉(zhuǎn)、下陷而停滯不前的主要原因。因此,研究驅(qū)動(dòng)輪與月壤間相互作用方式及其變化規(guī)律,對(duì)于提高月面探測(cè)車(chē)輛的通過(guò)性,從而保障月球車(chē)工作的可靠性具有重要意義。 本文以火山灰和石英砂為主要原料制備了三種用于月面車(chē)輛試驗(yàn)用模擬月壤,利用研制的月壤—車(chē)輪土槽測(cè)試系統(tǒng),對(duì)五種不同結(jié)構(gòu)的月球車(chē)驅(qū)動(dòng)輪在三種不同介質(zhì)上的牽引特性進(jìn)行對(duì)比試驗(yàn),并分析不同車(chē)輪結(jié)構(gòu)下模擬月壤的破壞失效形式、不同介質(zhì)破壞形式、輪刺坑形狀以及介質(zhì)和車(chē)輪結(jié)構(gòu)對(duì)車(chē)輪牽引性能的影響規(guī)律。分析了原始狀態(tài)下模擬月壤圓錐指數(shù)(CI)分布情況,探究載荷及整備條件對(duì)CI值的影響規(guī)律,提出試驗(yàn)前模擬月壤一致性處理方法,在此基礎(chǔ)上進(jìn)行了被試剛性輪壓痕試驗(yàn)和車(chē)輪壓實(shí)土槽試驗(yàn),根據(jù)車(chē)輪壓痕面積、壓痕深度以及車(chē)輪結(jié)構(gòu)參數(shù)和行駛參數(shù)探討車(chē)輪對(duì)模擬月壤CI值的影響,并計(jì)算了車(chē)輛圓錐指數(shù)作為評(píng)價(jià)月球車(chē)整車(chē)通過(guò)性指標(biāo)和土壤—車(chē)輪系數(shù)作為評(píng)價(jià)月壤可行駛性指標(biāo)。采用離散元方法細(xì)觀分析了微重力環(huán)境下月壤力學(xué)參數(shù)變化對(duì)貫入阻力的影響規(guī)律和驅(qū)動(dòng)輪結(jié)構(gòu)參數(shù),包括輪徑、輪刺高度、輪刺寬度和輪刺數(shù)量對(duì)牽引性能的影響規(guī)律,并建立了車(chē)輪與模擬月壤相互作用有限元與離散元多尺度計(jì)算模型,在保證模擬精度的基礎(chǔ)上,探討提高模擬程序運(yùn)算效率的途徑。 以上研究為月面探測(cè)車(chē)輛的驅(qū)動(dòng)輪設(shè)計(jì)優(yōu)化、模擬月壤一致性處理、原理樣機(jī)通過(guò)性驗(yàn)證試驗(yàn)場(chǎng)地整備提供基礎(chǔ)數(shù)據(jù)和測(cè)試方法。
[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.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2010
【分類(lèi)號(hào)】：P184.5

【引證文獻(xiàn)】

相關(guān)會(huì)議論文 前1條

1 譚松成;段隆臣;高輝;;重力環(huán)境對(duì)月壤三軸模擬試驗(yàn)結(jié)果的影響分析[A];顆粒材料計(jì)算力學(xué)研究進(jìn)展[C];2012年

相關(guān)博士學(xué)位論文 前1條

1 趙志萍;一種新型月球車(chē)行走系統(tǒng)相關(guān)技術(shù)及實(shí)驗(yàn)研究[D];哈爾濱工業(yè)大學(xué);2010年

相關(guān)碩士學(xué)位論文 前5條

1 盧智利;蚶類(lèi)表面形貌磨料磨損行為的試驗(yàn)與仿真研究[D];吉林大學(xué);2011年

2 劉天喜;淺層月壤采樣過(guò)程的機(jī)土耦合作用研究[D];哈爾濱工業(yè)大學(xué);2011年

3 劉琳琳;月球車(chē)輪壤系統(tǒng)仿真分析[D];吉林大學(xué);2012年

4 王偉;月球車(chē)仿葉輪式半步行輪設(shè)計(jì)[D];大連理工大學(xué);2012年

5 陳光明;基于四種耐磨生物體表形貌的仿生結(jié)構(gòu)磨損行為離散元模擬[D];吉林大學(xué);2012年

，

本文編號(hào)：2418086