Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method
Joint Authors
Juntao, Kang
Qin, Shiqiang
Wang, Qiuping
Source
Advances in Materials Science and Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-10-04
Country of Publication
Egypt
No. of Pages
12
Abstract EN
The output-only modal analysis for bridge structures based on improved empirical mode decomposition (EMD) is investigated in this study.
First, a bandwidth restricted EMD is proposed for decomposing nonstationary output measurements with close frequency components.
The advantage of bandwidth restricted EMD to standard EMD is illustrated by a numerical simulation.
Next, the modal parameters are extracted from intrinsic mode function obtained from the improved EMD by both random decrement technique and stochastic subspace identification.
Finally, output-only modal analysis of a railway bridge is presented.
The study demonstrates the mode mixing issues of standard EMD can be restrained by introducing bandwidth restricted signal.
Further, with the improved EMD method, band-pass filter is no longer needed for separating the closely spaced frequency components.
The modal parameters extracted based on the improved EMD method show good agreement with those extracted by conventional modal identification algorithms.
American Psychological Association (APA)
Qin, Shiqiang& Wang, Qiuping& Juntao, Kang. 2015. Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method. Advances in Materials Science and Engineering،Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1053736
Modern Language Association (MLA)
Qin, Shiqiang…[et al.]. Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method. Advances in Materials Science and Engineering No. 2015 (2015), pp.1-12.
https://search.emarefa.net/detail/BIM-1053736
American Medical Association (AMA)
Qin, Shiqiang& Wang, Qiuping& Juntao, Kang. Output-Only Modal Analysis Based on Improved Empirical Mode Decomposition Method. Advances in Materials Science and Engineering. 2015. Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1053736
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1053736