| 运行模态分析技术在桥梁状态评估中的应用 |
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| 引用本文： | 郭苏杰,王俊,张宇峰.运行模态分析技术在桥梁状态评估中的应用[J].现代交通技术,2007,4(3):42-44,48. |
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| 作者姓名： | 郭苏杰 王俊 张宇峰 |
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| 作者单位： | 1. 南京市市政管理处,江苏,南京,210009
2. 江苏省交通科学研究院,江苏,南京,210017 |
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| 摘 要： | 在输出功率谱的基础上建立了桥梁运行模态分析方法——频域分解法。该方法利用来往车辆激励的响应测量数据,进行无偏功率谱分析,然后对响应谱矩阵进行奇异值分解来识别桥梁的模态参数。该方法保留了传统频域法快速简便的特点,还可以解决传统频域法不能识别近频和重频模态的问题。通过实桥测试,证明该方法可用于桥梁承载力和使用状况评估。
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| 关 键 词： | 桥梁工程 状态评估 运行模态 频域分解 |
| 文章编号： | 1672-9889（2007）03-0042-03 |
| 修稿时间： | 2007-02-13 |
Application of Operational Modal Analysis in Bridge State Assessment |
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| Guo Sujie,Wang Jun,Zhang Yufeng.Application of Operational Modal Analysis in Bridge State Assessment[J].Modern Transportation Technology,2007,4(3):42-44,48. |
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| Authors: | Guo Sujie Wang Jun Zhang Yufeng |
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| Institution: | 1,Nanjing Municipal Administrative Office, Nanjing 210009, China; 2,Jiangsu Transportation Research Institute, Nanjing 210017, China |
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| Abstract: | A new operational analysis method named frequency domain decomposition was built based on outputting power spectrum,Responding signal excited by traveling vehicles was utilized to analyze unbiased power spectrum.Then bridge modal parameters could be discerned through singular value decomposition of response spectrum,It is not only simple,convenient and quick as traditional frequency domain method,but also could discern closed and overlapped modals.In the end,a real bridge test proved that the method could be used to estimate bridge load bearing capacity and condition. |
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| Keywords: | bridge engineering state assessment operational modal frequency domain decomposition |
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