Structural system identification by utilizing transmissibility coherence from limited measured data

12th International Conference on Damage Assessment of Structures

Zhou, Yun-Lai^1 ; Hongyou, Cao^2 ; Zhen, Ni^1 ; Zhang, Li^3 ; Abdel Wahab, Magd^4

Department of Civil and Environmental Engineering, National University of Singapore, 2 Engineering Drive 2, Singapore

117576, Singapore^1

School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan

430070, China^2

Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, College of Physical Science and Technology, Yili Normal University, 835000, China^3

Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 903, Zwijnaarde

B-9052, Belgium^4

关键词: Cross-spectrum analysis;    Four-point measurements;    Reference points;    Structural system identification;    Two-point;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/842/1/012020/pdf
DOI  :  10.1088/1742-6596/842/1/012020

来源: IOP

【 摘 要 】

System identification performs as a core issue in structural dynamic analysis. In this study, transmissibility coherence is introduced for system identification with recalling the existing techniques based on transmissibility. Unlike previous approaches that require four-point measurement, the proposed methodology in this study only requires two-point measurement. The merit behind this approach is that the transmissibility coherence can be employed to estimate the subtraction of transmissibility between two reference points, by using auto- and cross-spectrum analysis. Verification using experimental data proves the feasibility of the proposed technique.