本文選題：月壤 + 接觸模型　； 參考：《地下空間與工程學報》2015年05期

【摘要】：技術(shù)的發(fā)展使得月球車原材料強度更高、質(zhì)量更輕,而復雜的探測任務(wù)要求月球車攜帶的探測設(shè)備越來越多。為了平衡月球車承受的荷重,防止月球車車輪因承受荷載不當導致在月面打滑、下陷以致不能正常行駛,有必要研究月面環(huán)境下豎向荷載對月球車行駛性能的影響。針對真實月壤內(nèi)摩擦角較大、有粘聚力的特點,采用筆者提出的一種考慮粒間抗轉(zhuǎn)動作用與粒間范德華力兩個因素的月壤散粒體力學接觸模型,模擬月面環(huán)境下三種豎向荷載P作用下月球車剛性驅(qū)動輪與月壤的相互作用問題。其中,當豎向荷載為400/6 N時,車輪打滑,因此,文中主要對豎向荷載為1 000/6 N和1 350/6 N兩種情況進行對比分析。研究結(jié)果表明:月面環(huán)境下,滑轉(zhuǎn)率隨豎向荷載的增加呈下降趨勢,月球車因為輪上荷載過小,導致滑轉(zhuǎn)下陷過大而失去行走能力的風險更高。沉陷量也隨豎向荷載的增加而減小,月面環(huán)境下荷載過小會使月壤的可通過性變差。月面環(huán)境下牽引效率隨豎向荷載增大而升高但都保持在較低水平。
[Abstract]:With the development of technology, the raw materials of lunar rover are more intense and lighter, and the complex detection task requires more and more detection equipment to be carried by the lunar rover. In order to balance the load of the lunar rover and prevent the wheel of the lunar rover from sliding and sinking on the lunar surface due to improper load, it is necessary to study the influence of vertical load on the driving performance of the lunar rover under the lunar surface environment. In view of the characteristics of large internal friction angle and cohesive force in real lunar soil, a physical contact model of lunar soil is proposed, which takes into account the two factors of interparticle anti-rotation and inter-particle van der Waals force. The interaction between rigid driving wheel of lunar rover and lunar soil under three vertical loads P is simulated. Among them, when the vertical load is 400 / 6N, the wheel slips, so the vertical load of 1 000 / 6 N and 1 350% 6 N are compared and analyzed in this paper. The results show that the slip rate decreases with the increase of vertical load on the lunar surface, and the risk of losing the walking ability of the lunar rover is higher because the load on the wheel is too small. The amount of subsidence also decreases with the increase of vertical load, and if the load is too small in the lunar surface environment, the transmissivity of the lunar soil will become worse. The traction efficiency increases with the increase of vertical load but remains at a lower level under lunar environment.
【作者單位】： 同濟大學地下建筑與工程系;同濟大學巖土及地下工程教育部重點實驗室;
【基金】：國家杰出青年基金(51025932) 國家自然科學基金(51179128)
【分類號】：P184.5;V476.3

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本文編號：1988643