Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/144484
Title: Bayesian operational modal analysis with multiple setups and multiple (possibly close) modes
Authors: Zhu, Zuo
Au, Siu-Kui
Li, Binbin
Xie, Yan-Long
Keywords: Engineering::Civil engineering
Issue Date: 2021
Source: Zhu, Z., Au, S.-K., Li, B. & Xie, Y.-L. (2021). Bayesian operational modal analysis with multiple setups and multiple (possibly close) modes. Mechanical Systems and Signal Processing, 150, 107261-. doi:10.1016/j.ymssp.2020.107261
Project: EP/N017897/1
SUG/4 (C120032000)
130000-171207704/018
Journal: Mechanical Systems and Signal Processing
Abstract: Operational modal analysis (OMA) is increasingly applied to identify the modal properties of a constructed structure for its high economy in implementation. Though great achievement has been made in OMA, it is still challenging in the scenario of multiple setup data with close modes, due to the need to assemble the global mode shapes and the intervention of closemodes, especially when the data quality is low in some setups. A Bayesian approach is developed in this paper to compute the most probable value (MPV) of modal parameters incorporating data from multiple setups and multiple (possibly close) modes. It employs an expectation-maximisation algorithm which admits an analytical update of modal parameters except the frequencies and damping ratios, thus allowing an efficient computation of the MPV, usually in the order of tens of seconds for each frequency band even when there are a large number of degrees of freedom and long data. A comprehensive study based on synthetic and field test data is presented to illustrate the performance of the proposed algorithm. Comparing with three existing algorithms, it shows the quality of the identified global mode shape is good and insensitive to the method used when the data quality is consistently high in all setups; However, only the proposed Bayesian approach yields consistently reasonable results when the data quality is low in some setups.
URI: https://hdl.handle.net/10356/144484
ISSN: 0888-3270
DOI: 10.1016/j.ymssp.2020.107261
Schools: School of Civil and Environmental Engineering 
Organisations: UK Engineering & Physical Research Council
Research Centres: Institute of Catastrophe Risk Management (ICRM) 
Rights: © 2021 Elsevier Ltd. All rights reserved. This paper was published in Mechanical Systems and Signal Processing and is made available with permission of Elsevier Ltd.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

Files in This Item:
File Description SizeFormat 
BAYOMA for multiple setup with multiple modes-accepted.pdfaccepted manuscript1.14 MBAdobe PDFThumbnail
View/Open

SCOPUSTM   
Citations 20

25
Updated on Mar 28, 2024

Web of ScienceTM
Citations 20

15
Updated on Oct 29, 2023

Page view(s)

294
Updated on Mar 28, 2024

Download(s)

19
Updated on Mar 28, 2024

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.