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| 基于多参考点稳定图的斜拉桥模态参数识别 | |
| 引用本文： | 叶锡钧,颜全胜,王卫锋,李健.基于多参考点稳定图的斜拉桥模态参数识别[J].华南理工大学学报(自然科学版),2011,39(9):41-47,53. |
| 作者姓名： | 叶锡钧 颜全胜 王卫锋 李健 |
| 作者单位： | 1. 华南理工大学土木与交通学院,广东广州,510640 2. 华南理工大学土木与交通学院,广东广州510640;华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 3. 伊利诺伊大学厄西纳-香槟分校环境工程学院,美国香槟61801 |
| 基金项目： | 广东省交通运输厅科技项目(2010-02-015) |
| 摘 要： | 针对激励未知情况下,运行模态分析容易遗漏真实模态和产生虚假模态的问题,提出了基于特征系统实现算法的多参考点稳定图算法.该算法通过设置不同的参考点,利用自然激励技术结合特征系统实现算法识别模态参数,以阻尼比、基于输出矩阵的一致模态指标和模态置信度作为判别指标,确定可信度最高的模态参数.运用该算法和增强频域分解法对大跨度斜... |
| 关 键 词： | 斜拉桥 运行模态分析 多参考点稳定图 自然激励技术 特征系统实现算法 增强频域分解 |
Modal Parameter Identification of Cable-Stayed Bridge Based on Multiple Reference DOFs Stabilization Diagram |
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| Ye Xi-jun,Yah Quan-sheng,Wang Wei-feng,Li Jian.Modal Parameter Identification of Cable-Stayed Bridge Based on Multiple Reference DOFs Stabilization Diagram[J].Journal of South China University of Technology(Natural Science Edition),2011,39(9):41-47,53. | |
| Authors: | Ye Xi-jun Yah Quan-sheng Wang Wei-feng Li Jian |
| Institution: | Ye Xi-jun1 Yan Quan-sheng1,2 Wang Wei-feng1 Li Jian3(1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China,2.State Key Laboratory of Subtropical Building Science,3.College of Environmental Engineering,University of Illinois at Urbana-Champaign,Champaign 61801,USA) |
| Abstract: | As it is easy for the operational modal analysis with unkown excitation to miss true modes and produce spurious modes,an improved multiple reference degrees of freedom(DOFs) stabilization diagram algorithm is proposed based on eigensystem realization algorithm.In this algorithm,by setting different reference DOFs in each group of data,the modal parameters are identified by means of the natural excitation technique in junction with the eigensystem realization algorithm.Then,the most accurate modal parameters... |
| Keywords: | cable-stayed bridge operational modal analysis multiple reference DOFs stabilization diagram natural excitation technique eigensystem realization algorithm enhanced frequency domain decomposition |
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