| 引用本文: | 周旋,周仕明,李道奎.月壤参数对月面着陆气囊缓冲性能的影响.[J].国防科技大学学报,2022,44(4):69-80.[点击复制] |
| ZHOU Xuan,ZHOU Shiming,LI Daokui.Influence of lunar soil parameters on the lunar landing airbag cushioning performance[J].Journal of National University of Defense Technology,2022,44(4):69-80[点击复制] |
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| 月壤参数对月面着陆气囊缓冲性能的影响 |
| 周旋1,2,周仕明1,2,李道奎1,2 |
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(1. 国防科技大学 空天科学学院, 湖南 长沙 410073;2. 空天任务智能规划与仿真湖南省重点实验室, 湖南 长沙 410073)
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| 摘要: |
| 为研究月壤参数对气囊缓冲性能的影响,根据“嫦娥三号”的着陆工况设计了月面着陆气囊,并基于可压溃泡沫模型建立了考虑月壤特性的气囊缓冲动力学模型。对不同月壤下气囊的缓冲过程进行分析,发现月壤越软有效载荷冲击加速度越小,但气囊会陷入月壤中,不利于对外排气,影响其缓冲效果。因此,采用气囊峰值压力、有效载荷最大加速度和最大下落高度3个指标对气囊缓冲性能进行综合评价,定量研究了月壤参数的影响规律。结果表明:月壤密度、剪切模量及屈服参数a0和a1对缓冲性能的影响较大,且对前两个指标为正影响,对后一个指标为负影响。进一步研究发现,这4个月壤参数与3个缓冲性能指标之间均为指数函数关系。 |
| 关键词: 气囊 月面 土壤 着陆冲击 缓冲性能 |
| DOI：10.11887/j.cn.202204008 |
| 投稿日期：2022-02-25 |
| 基金项目:载人航天领域预先研究资助项目(040202)；湖南省研究生科研创新资助项目(CX20190048) |
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| Influence of lunar soil parameters on the lunar landing airbag cushioning performance |
| ZHOU Xuan1,2, ZHOU Shiming1,2, LI Daokui1,2 |
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(1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. Hunan Key Laboratory of Intelligent Planning and Simulation for Aerospace Missions, Changsha 410073, China)
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| Abstract: |
| To study the influence of lunar soil parameters on the airbag buffer performance, a lunar landing airbag was designed according to the landing conditions of “Chang′e 3” probe, and then an airbag dynamic model considering the characteristics of lunar soil was established based on the crushable foam model. The airbag cushioning process under different lunar soils was analyzed, and it is found that the softer the lunar soil, the smaller the payload impact acceleration, but the airbag will sink into the lunar soil, which is not conducive to venting and affects its cushioning effect. Therefore, three indicators of airbag peak pressure, payload maximum acceleration, and payload maximum drop height were used to evaluate the airbag cushioning performance comprehensively, and the influence law of lunar soil parameters was quantitatively studied. Results show that the lunar soil density and shear modulus, as well as the yield parameters a0 and a1, have a significant influence on the cushioning performance, with a positive effect on the first two indicators and a negative effect on the latter one. Further research reveals that the relationship between each of the four lunar soil parameters and the three cushioning performance indicators is an exponential function. |
| Keywords: airbag lunar surface soil landing impact cushioning performance |
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