环境激励下桥梁模态参数识别的频谱方法综述  

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

作　　者：张云龙[1] 张家源 钱雪松 张攀 杨润超[3] ZHANG Yun-long;ZHANG Jia-yuan;QIAN Xue-song;ZHANG Pan;YANG Run-chao(School of Communication Science and Engineering,Jilin Jianzhu University,Changchun 130118,China;Changchun Construction Project Safety Supervision Station,Changchun 130012,China;Jilin Province Highway Administration,Changchun 130021,China)

机构地区：[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

出　　处：《吉林大学学报（工学版）》2023年第6期1580-1591,共12页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林省科技发展计划项目(20220203068SF).

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。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.

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 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]