| 大跨屋盖结构风致动力响应高阶主导模态的识别 |
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| 引用本文： | 李玉学,杨庆山,田玉基. 大跨屋盖结构风致动力响应高阶主导模态的识别[J]. 北京交通大学学报(自然科学版), 2010, 34(1): 89-94. DOI: 10.3969/j.issn.1673-0291.2010.01.019 |
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| 作者姓名： | 李玉学 杨庆山 田玉基 |
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| 作者单位： | 北京交通大学,土木建筑工程学院,北京,100044;北京交通大学,土木建筑工程学院,北京,100044;北京交通大学,土木建筑工程学院,北京,100044 |
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| 基金项目： | 国家自然科学杰出青年基金资助项目(50725862) |
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| 摘 要： | 高阶模态的贡献在大跨屋盖结构风振响应分析中不能忽略.从模态空间分布和风荷载空间分布相关性强弱与模态对结构响应贡献程度的相互关系出发,提出了通过低阶主要贡献模态间接寻找风荷载强相关高阶模态的思想.在此基础上,通过对高阶模态响应方差矩阵的简化处理得到其等效矩阵.根据等效矩阵中对角线元素构造了高阶模态的模态参与系数,实现对高阶主导模态的识别,有效考虑了高阶模态的贡献.最后,通过对2008年北京奥运会网球中心屋盖结构的风振响应分析对所提出方法的有效性进行了验证.
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| 关 键 词： | 大跨屋盖 风振响应 高阶模态 模态识别 |
Identification of High Frequency Modes with Significant Contributions to Wind-Induced Vibration of Large-Span Roofs |
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| LI Yuxue,YANG Qingshan,TIAN Yuji. Identification of High Frequency Modes with Significant Contributions to Wind-Induced Vibration of Large-Span Roofs[J]. JOURNAL OF BEIJING JIAOTONG UNIVERSITY, 2010, 34(1): 89-94. DOI: 10.3969/j.issn.1673-0291.2010.01.019 |
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| Authors: | LI Yuxue YANG Qingshan TIAN Yuji |
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| Affiliation: | School of Civil Engineering;Beijing Jiaotong University;Beijing 100044;China |
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| Abstract: | The contribution of higher order modes can not be neglected in wind-induced vibration analysis of large span roofs.Considering the relationship between the related level of modal spatial distribution and wind load spatial distribution and the contribution levels of modes to structural response,a method of indirectly identifying higher order modes that are strongly correlated with wind load from dominant lower order modes is proposed.On this basis,the equivalent matrix can be achieved by simplifying the cova... |
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| Keywords: | large-span roof wind-induced vibration high-frequency mode mode identification |
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