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论文:2015,Vol:33,Issue(4):603-608 |
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引用本文： |
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聂良, 贺尔铭, 韩晓宇, 马小飞. 随机失谐星载天线振动局部化的统计特性分析[J]. 西北工业大学学报 |
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Nie Liang, He Erming, Han Xiaoyu, Ma Xiaofei. A Statistical Analysis of Vibration Localization of Space-Borne Antenna[J]. Northwestern polytechnical university |
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| 随机失谐星载天线振动局部化的统计特性分析 |
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| 聂良1, 贺尔铭1, 韩晓宇1, 马小飞2 |
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1. 西北工业大学 航空学院, 陕西 西安 710072;
2. 中国航天科技集团公司五院西安分院, 陕西 西安 710100 |
| 摘要: |
| 为了研究随机失谐对星载天线结构动力学特性的影响,本文建立了径向肋天线结构的集中参数模型,基于Monte Carlo数值计算方法研究了随机失谐天线的模态局部化与受迫振动响应局部化的统计特性。研究结果表明:失谐强度增大会使结构的各阶共振频率范围变宽,从而使结构发生共振的危险机率增大;失谐强度增大或耦合刚度减小都会使结构的模态局部化程度增大,其中质量失谐对高阶模态振型影响较大,而刚度失谐对低阶模态振型影响较大;失谐限制了天线结构中振动能量的传播,适当增大径向肋间的耦合刚度会使原本限制在少数径向肋上的振动能量均匀传播到所有肋上。 |
| 关键词:
径向肋天线
随机失谐
Monte Carlo
振动局部化
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| A Statistical Analysis of Vibration Localization of Space-Borne Antenna |
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| Nie Liang1, He Erming1, Han Xiaoyu1, Ma Xiaofei2 |
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1. College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. CAST-Xi'an Institute of Space Radio Technology, Xi'an 710100, China |
| Abstract: |
| In order to study the effect of random mistuning on structural dynamic characteristics of space-borne antenna, a lumped parameter model of antenna with 18 radial ribs is established, and the statistic characteristics of vibration localization of the space-borne antenna is studied based on numerical calculation method of Monte Carlo. The research results show that: the mistuning strength increase causes range of antenna resonance frequency broaden, which leads to larger risk of structural resonances; the mistuning strength increase or coupling stiffness decrease can increase the degree of structural mode localization; the mass mistuning has greater influence on higher order mode shapes, whereas the stiffness mistuning has greater influence on the lower order mode shapes. The mistuning limits the propagation of vibration energy within ribs of antenna structure, the coupling stiffness between ribs increases to a certain value can make vibration energy spread to all the ribs uniformly. |
| Key words:
antennas
calculations
design
dynamics
errors
finite element method
mathematical models
matrix algebra
Monte Carlo methods
natural frequencies
resonance
structural dynamics
vibrations(mechanical)
radial rib antenna
random mistuning
vibration localization
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| 收稿日期: 2015-04-02
修回日期:
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| DOI: |
| 基金项目: 航天科技创新基金(2014KC010043)资助 |
| 通讯作者:
Email： |
| 作者简介: 聂良(1991—),西北工业大学硕士研究生,主要从事结构动力学分析及优化研究。
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参考文献: |
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[1] 刘荣强, 田大可, 邓宗全. 空间可展开天线结构的研究现状与展望[J]. 机械设计,2010, 27(9): 1-10 Liu Rongqiang, Tian Dake, Deng Zongquan. Research Actuality and Prospect of Structure for Space Deployable Antenna[J]. Journal of Mechanical Design, 2010, 27(9): 1-10 (in Chinese)
[2] Bendiksen O O. Mode Localization Phenomena in Large Space Structures[J]. AIAA Journal 1987, 25(9): 1241-1248
[3] Levine-West M B, Salamat M A. Mode Localization Experiments on a Ribbed Antenna[J]. AIAA Journal, 1993, 31(10): 1929-1937
[4] Zee R E, Hughes P C. Mode Localization in Flexible Spacecraft: A Control Challenge[J]. Guidance, Control and Dynamics, 2000, 23(1): 69-76
[5] Cornwell P J, Bendiksen O O. Impulse Response of Space Reflectors with Localized Modes[J]. Journal of Spacecraft and Rockets, 1992, 29(4): 484-490
[6] 刘相秋,王聪,王威远,等. 失谐大型天线结构的振动模态局部化研究[J]. 宇航学报, 2008, 29(06): 1756-1760 Liu Xiangqiu, Wang Cong, Wang Weiyuan, et al. Study on Vibration Mode Localization of Disordered Large Antennas[J]. Journal of Astronautics, 2008, 29(06):1756-1760 (in Chinese)
[7] Cox A M, Agnes G S. A Statistical Analysis of Space Structure Modellial[C]//Proceedings of the 1999 AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit, 1999: 3123-3133
[8] El-Raheb M, Wagner P. Static and Dynamic Characteristics of Large Deployable Space Reflectors[C]//Proceedings of the AIAA/ASME/ASCE/AHS 22nd Structures, Structural Dynamics and Materials Conference, New York, 1981:77-84
[9] 贺尔铭, 余仕侠, 王红建. 随机失谐叶盘系统受迫振动响应的统计特性研究[J]. 机械强度, 2007, 29(1): 20-24 He Erming, Yu Shixia, Wang Hongjian. Statistical Analysis of the Forced Response of Random Mistuning Bladed Disk[J]. Journal of Mechanical Strength, 2007, 29(1): 20-24 (in Chinese)
[10] 王红建, 贺尔铭, 赵志彬. 频率转向特征对失谐叶盘模态局部化的作用[J]. 中国机械工程,2009,10(1): 82-85 Wang Hongjian, He Erming, Zhao Zhibin. Effects of Frequency Veering Features on Mode Localization of Mistuned Bladed Disks[J]. China Mechanical Engineering, 2009,10(1): 82-85 (in Chinese) |
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