| 卫星大挠性桁架结构振动抑制试验研究 |
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| 引用本文： | 周成刚,李东旭.卫星大挠性桁架结构振动抑制试验研究[J].航天控制,2009,27(2). |
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| 作者姓名： | 周成刚 李东旭 |
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| 作者单位： | 1. 国防科技大学航天与材料工程学院,长沙,410073;中国卫星海上测控部,江阴,214431
2. 国防科技大学航天与材料工程学院,长沙,410073 |
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| 摘 要： | 研究大型挠性空间桁架结构(LFST)的振动抑制问题.基于LFST特性,设计一套空间桁架试验系统.针对LFST具有大挠性、低刚度和低阻尼等特性,设计并研制一种圆柱式剪切型粘弹性阻尼器,给出具有粘弹性阻尼器的桁架阻尼杆的动力学模型.分别利用有限元方法和试验分析方法,对空间桁架的模态频率、模态阻尼比以及瞬态激励响应进行仿真和试验分析.结果表明应用这种阻尼器,桁架结构系统的第一阶模态阻尼比从0.49%增大到13.1%,其他各阶模态阻尼比也都有所增加.
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| 关 键 词： | 空间桁架 粘弹性阻尼器 有限元分析 振动抑制 |
Experiment of Vibration Suppression for Large Flexible Space Truss Structures of Satellite |
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| ZHOU Chenggang,LI Dongxu.Experiment of Vibration Suppression for Large Flexible Space Truss Structures of Satellite[J].Aerospace Control,2009,27(2). |
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| Authors: | ZHOU Chenggang LI Dongxu |
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| Institution: | ZHOU Chenggang1,2 LI Dongxu11.College of Aerospace & Material Engineering,NUDT,Changsha 410073,China2.The Department of Chinese Observatory on the Sea,Jiangyin 214431,China |
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| Abstract: | The vibration suppression of large flexible space trusses(LFST) is a challenging subject because of its large flexibility,low rigidity and low damping.The problem of vibration suppression for an experimental truss with shear-type cylindrical viscoelastic damper is considered.The dynamic model of the truss is established by using the finite element method.The numerical simulation and experimental results of modal frequency,modal damping ratio and transient response are obtained.The most interesting result is... |
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| Keywords: | Space truss Viscoelastic damper Finite element analysis Vibration suppression |
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