| LT50m缩比模型悬索舱体系统的风振分析 |
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| 引用本文： | 魏强,仇原鹰,段宝岩.LT50m缩比模型悬索舱体系统的风振分析[J].应用力学学报,2003,20(1):59-63. |
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| 作者姓名： | 魏强 仇原鹰 段宝岩 |
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| 作者单位： | 西安电子科技大学,西安,710071 |
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| 基金项目： | 国家自然科学基金(596 750 4 0 )，中科院国家天文观测中心大射电望远镜实验室经费资助 |
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| 摘 要： | 在新一代大型射电望远镜（LT）的悬索舱体系统中增加了抑制风激振动的下拉结构控制索系，并分析了50m缩比模型的风振响应。首先，由非线性静力分析确定结构初始静态参考位形和初应力；其次，针对结构特点模拟作用在悬索和馈源舱上的随机风荷。在上述研究的基础上，在时域中模拟分析下拉索系对结构风振的抑制效果，同时通过典型节点时域响应的FFT变换，给出响应自功率谱图，进一步描述了振动控制的效果。
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| 关 键 词： | 大型射电望远镜 悬索舱体结构 非线性分析 优化 风激振动 |
| 文章编号： | 1000-4939(2003)01-0059-05 |
| 修稿时间： | 2001年9月13日 |
Wind Induced Vibration Analysis of a 50 Meter Scaled Model of Large Radio Telescope |
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| Wei Qiang,Qiu Yuanying,Duan Baoyan.Wind Induced Vibration Analysis of a 50 Meter Scaled Model of Large Radio Telescope[J].Chinese Journal of Applied Mechanics,2003,20(1):59-63. |
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| Authors: | Wei Qiang Qiu Yuanying Duan Baoyan |
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| Abstract: | A downward cable system for structural control is desi gn to control wind-induced vibration for the next generation large radio telesco pe. The wind induced vibration of a 50 meter scaled model of the telescope is an alyzed. Initial static reference posture and initial stresses are determined by nonlinear static analysis. Random wind forces acted on the cables, and the cabin are simulated based on the characters of the structure. Then the control effect of the downward cable system to structural vibration is analyzed in time region . Meanwhile the frequency response figure of a special node of the cabin is dra wn through FFT transformation, which describes the control effect further. |
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| Keywords: | large radio telescope suspended feed cabin str ucture nonlinear analysis optimization wind-induced vibration |
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