| 引用本文: | 武新峰,雷勇军,李道奎.液体推进剂消耗对大型卫星结构动特性的影响分析.[J].国防科技大学学报,2012,34(4):38-42.[点击复制] |
| WU Xinfeng,LEI Yongjun,LI Daokui.Dynamic analysis of a large scale satellite structure with the liquid propellant consuming[J].Journal of National University of Defense Technology,2012,34(4):38-42[点击复制] |
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| 液体推进剂消耗对大型卫星结构动特性的影响分析 |
| 武新峰, 雷勇军, 李道奎 |
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(国防科技大学 航天与材料工程学院,湖南 长沙 410073)
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| 摘要: |
| 为了研究液体推进剂消耗对某大型卫星结构动特性的影响，采用简化的“弹簧-质量”模型分析了推进剂消耗对结构动特性的影响趋势；基于MSC.PATRAN/NASTRAN给出了动力学分析过程中液体推进剂的等效建模和分析方法，包括梁单元法、附加质量法、“RBE3-质量点”单元法和虚拟质量法等；建立了该卫星结构的有限元模型，进行了结构动力学特性和动响应分析，讨论了液体推进剂消耗对其动特性的影响规律。研究结果表明：随着推进剂的消耗，卫星整体振型的固有频率逐渐增大，而部分局部振型的固有频率保持不变；随着推进剂的消耗，卫星仪器安装板动力学响应峰值逐渐增大，所对应的频率也逐渐增大。 |
| 关键词: 液体推进剂 卫星结构 有限元建模 结构动特性分析 |
| DOI： |
| 投稿日期：2011-09-15 |
| 基金项目:教育部新世纪优秀人才支持计划项目(NCET-08-0148) |
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| Dynamic analysis of a large scale satellite structure with the liquid propellant consuming |
| WU Xinfeng, LEI Yongjun, LI Daokui |
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(College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| A simplified ‘Spring-Mass’ dynamic model and dynamic analysis were performed to obtain the influence of propellant consuming on the dynamic properties of a large scale satellite structure. Then the finite element modeling and analysis methods, including the beam modeling method, added with the mass method, the ‘RBE3-Mass’ modeling method and the virtual mass method, were given based on MSC.PATRAN/NASTRAN. In the end, the satellite finite element model was established and the dynamic analysis was executed. The analysis results indicate that: (1) the frequencies of main mode shapes will raise with the propellant consuming, while those of local shapes will not change ; (2)The frequency and magnitude of response will raise with the propellant consuming. |
| Keywords: liquid propellant satellite structure finite element modeling structural dynamic analysis |
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