基于响应传递比的桥梁结构工作模态参数识别

孙倩; 颜王吉; 任伟新

doi:10.6052/j.issn.1000-4750.2016.07.0558

基于响应传递比的桥梁结构工作模态参数识别

合肥工业大学土木与水利工程学院, 安徽, 合肥 230009

基金项目: 国家重点研发计划项目（2016YFE0113400）；国家自然科学基金项目（51408176，51278163）

详细信息

作者简介:
孙倩(1990―),女,安徽六安人,博士生,从事振动信号处理研究(E-mail:sqhorse90@126.com);颜王吉(1985―),男,浙江金华人,研究员,博士,硕导,主要从事振动信号处理、系统识别和健康监测理论研究(E-mail:civilyanwj@gmail.com).

通讯作者:
任伟新(1960―),男,湖南长沙人,长江学者特聘教授,博士,博导,主要从事桥梁结构稳定与振动研究(E-mail:renwx@hfut.edu.cn).

中图分类号: TU311.3;TN911.6
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- 文章访问数: 369
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- PDF下载量: 49
出版历程
- 收稿日期: 2016-07-20
- 修回日期: 2016-11-12
- 刊出日期: 2017-11-24

OPERATIONAL MODAL ANALYSIS FOR BRIDGE ENGINEERING BASED ON THE DYNAMIC TRANSMISSIBILITY MEASUREMENTS

School of Civil Engineering, Hefei University of Technology, Hefei, Anhui 230009, China

摘要

摘要: 响应传递比在系统极点处与输入无关，并且等于振型比。基于这一独特性质，可以融合多个激励工况下的测试值构建传递比矩阵，并通过奇异值分解技术快速判断出系统的极点，进而根据传递比向量直接估算出振型向量。为了研究该方法在土木工程结构的工作模态参数识别中的应用，首先通过数值算例验证了响应传递比方法可以有效剔除谐波输入引起的虚假模态。此外，通过一环境激励下实桥的振动试验对该方法进行验证，并与有限元方法和随机子空间法结果进行了对比。结果表明，响应传递比方法能够有效地运用于环境激励下桥梁结构的模态参数识别。
- 模态分析 /
- 传递比 /
- 环境振动 /
- 功率谱估计 /
- 桥梁工程
Abstract: The dynamic transmissibility is equal to the ratios of mode shapes when approaching the system poles. On the basis of the unique property, transmissibility matrix is formulated by combining vibration response transmissibility functions under multiple vibration conditions, and the system poles are achieved by taking the Singular Value Decomposition (SVD) for transmissibility matrix. The proposed method is further employed to identify the mode shapes. The aim of this paper is to analyze its application to the modal parameters identification of structures under natural excitation. A numerically simulated beam is used to investigate the robustness of the method to harmonic excitations, and the result indicates that the method reduces the risk to identify the spurious modes induced by the presence of harmonics. Furthermore, the ambient vibration test data of a real bridge is adopted to extract the modal parameters. The field results are compared with those obtained from finite element analysis, and stochastic subspace identification. It has shown that the technique is capable of identifying the modal parameters of real bridges.
- modal analysis /
- transmissibility /
- ambient vibration /
- power spectral estimation /
- bridge engineering

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参考文献(21)

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施引文献(23)

期刊类型引用(9)

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文章访问数: 369
HTML全文浏览量: 53
PDF下载量: 49
被引次数: 23

基于响应传递比的桥梁结构工作模态参数识别

作者简介: 孙倩(1990―),女,安徽六安人,博士生,从事振动信号处理研究(E-mail:sqhorse90@126.com);颜王吉(1985―),男,浙江金华人,研究员,博士,硕导,主要从事振动信号处理、系统识别和健康监测理论研究(E-mail:civilyanwj@gmail.com).

通讯作者: 任伟新(1960―),男,湖南长沙人,长江学者特聘教授,博士,博导,主要从事桥梁结构稳定与振动研究(E-mail:renwx@hfut.edu.cn).

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出版历程

OPERATIONAL MODAL ANALYSIS FOR BRIDGE ENGINEERING BASED ON THE DYNAMIC TRANSMISSIBILITY MEASUREMENTS

期刊类型引用(9)

其他类型引用(14)

计量

出版历程

目录

作者简介:
孙倩(1990―),女,安徽六安人,博士生,从事振动信号处理研究(E-mail:sqhorse90@126.com);颜王吉(1985―),男,浙江金华人,研究员,博士,硕导,主要从事振动信号处理、系统识别和健康监测理论研究(E-mail:civilyanwj@gmail.com).

通讯作者:
任伟新(1960―),男,湖南长沙人,长江学者特聘教授,博士,博导,主要从事桥梁结构稳定与振动研究(E-mail:renwx@hfut.edu.cn).