| 大跨空间钢结构模态频率的温度影响监测与分析 |
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| 引用本文： | 滕军,卢云军,朱焰煌.大跨空间钢结构模态频率的温度影响监测与分析[J].工程抗震与加固改造,2010,32(3):36-41. |
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| 作者姓名： | 滕军 卢云军 朱焰煌 |
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| 作者单位： | 哈尔滨工业大学深圳研究生院,广东深圳,518055 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 研究大跨空间钢结构模态频率的环境变异性是准确把握结构动力特性的重要基础,本文分析了温度对结构模态频率的影响机理,并用网架结构数值模型进行了验证。利用奇异熵增量对随机子空间方法进行系统定阶,识别了不同环境温度下国家游泳中心大跨空间钢结构的模态频率,分析了温度与频率的关系。结果表明,大跨空间钢结构的竖向模态频率与温度负相关,低阶模态频率变化率大于高阶模态,并呈单调递减趋势。温度对大跨空间钢结构模态频率的影响不可忽视,在损伤识别等研究中应考虑环境温度的影响。
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| 关 键 词： | 频率变化 温度影响 随机子空间法 系统定阶 大跨空间钢结构 |
Monitoring and Analysis of Temperature's Effect on Frequency of Large Span Spatial Steel Structure |
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| Teng Jun,Lu Yun-jun,Zhu Yan-huang.Monitoring and Analysis of Temperature's Effect on Frequency of Large Span Spatial Steel Structure[J].Earthquake Resistant Engineering and Retrofitting,2010,32(3):36-41. |
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| Authors: | Teng Jun Lu Yun-jun Zhu Yan-huang |
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| Affiliation: | Teng Jun,Lu Yun-jun,Zhu Yan-huang(Harbin Institute of Technology Shenzhen Graduate School,Shenzhen 518055,China) |
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| Abstract: | The investigation of enviromental varibility of modal frequency is the foundation to comprehend the dynamic characters of structure.The mechanism of effect of temperature on modal frequency is analysised and verified by a numerical model of lattic truss structure.The modal frequencies of the steel structure of National Aquatics Center under different environment are idetificated by Stochastic Subspace Identification(SSI) method with the rank determined by the increment of singularity entropy.The research re... |
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| Keywords: | frequency variation effect of temperature SSI system rank large span spatial steel structure |
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