吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (6): 1580-1591.doi: 10.13229/j.cnki.jdxbgxb.20230077

• 综述 • 上一篇    

环境激励下桥梁模态参数识别的频谱方法综述

张云龙1(),张家源1,钱雪松1(),张攀2,杨润超3   

  1. 1.吉林建筑大学 交通科学与工程学院，长春 130118
    2.长春市建设工程安全监督站，长春 130012
    3.吉林省公路管理局，长春 130021
  • 收稿日期:2023-01-30 出版日期:2023-06-01 发布日期:2023-07-23
  • 通讯作者: 钱雪松 E-mail:zhangyunlong@jlju.edu.cn;qianxuesong@jlju.edu.cn
  • 作者简介:张云龙（1975-），男，教授，博士.研究方向：桥梁结构力学分析.E-mail：zhangyunlong@jlju.edu.cn
  • 基金资助:
    吉林省科技发展计划项目(20220203068SF)

Spectrum⁃driven methods for modal parameter identification of bridge under environmental excitation

Yun-long ZHANG1(),Jia-yuan ZHANG1,Xue-song QIAN1(),Pan ZHANG2,Run-chao YANG3   

  1. 1.School of Communication Science and Engineering，Jilin Jianzhu University，Changchun 130118，China
    2.Changchun Construction Project Safety Supervision Station，Changchun 130012，China
    3.Jilin Province Highway Administration，Changchun 130021，China
  • Received:2023-01-30 Online:2023-06-01 Published:2023-07-23
  • Contact: Xue-song QIAN E-mail:zhangyunlong@jlju.edu.cn;qianxuesong@jlju.edu.cn

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摘要：

首先，对基于频谱驱动的模态参数识别过程中的常用模型进行了梳理和总结。其次，讨论了两种最常用的频域识别技术，即峰值拾取法和复模态指示函数法，其中峰值拾取法是从输出测量谱的峰值中选择模态频率，而复模态指示函数法通过将频谱矩阵进行对角化实现结构模态参数的识别。此外，将复模态指示函数应用于功率谱密度，形成了频域分解方法。最后，讨论了多参考最小二乘复频域方法，该方法具有内存需求低、计算时间短以及自动化程度高等特征，因此其在桥梁结构的模态参数识别中具有良好的应用前景。

关键词: 桥梁结构, 模态参数, 参数识别, 环境激励, 频域识别技术

Abstract:

Firstly， the models used in parameter identification were summarized. Then， two popular techniques for frequency-domain identification were discussed， namely the Peak Picking method and the Complex Mode Indication Function method. The Peak Picking method is performed by selecting the modal frequency from the peak value of the output spectrum measured. While the Complex Mode Indication Function method is performed by diagonalizing the spectrum matrix. In addition， when the Complex Mode Indication Function is applied to the power spectral density， it becomes the reputed Frequency-Domain Decomposition method. Finally， the poly-reference Least Squares Complex Frequency domain method was discussed. This method shows advantages of low memory requirement， short computing time and high degree of automation， lying promising application in the operational modal analysis of bridge.

Key words: bridge structure, modal parameter, parameter identification, environmental excitation, frequency-domain techniques

中图分类号: 

  • U441.4
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