A Comparative Study Of Mode Decomposition To Relate Next-Era, Pca, And Ica Modes

Keywords

Dhip-bridge collision; Eigensystem realization analysis (ERA); Independent component analysis (ICA); Modal analysis; Mode decomposition; Natural excitation technique (NExT); Principal component analysis (PCA)

Abstract

This paper discusses a comparative study to relate parametric and non-parametric mode decomposition algorithms for response-only data. Three popular mode decomposition algorithms are included in this study: the Eigensystem Realization Algorithm with the Natural Excitation Technique (NExT-ERA) for the parametric algorithm, as well as the Principal Component Analysis (PCA) and the Independent Component Analysis (ICA) for the non-parametric algorithms. A comprehensive parametric study is provided for (i) different response types, (ii) excitation types, (iii) system damping, and (iv) sensor spatial resolution to compare the mode shapes and modal coordinates of using a 10-DOF building model. The mode decomposition results are also compared using a unique dynamic response data collected in a ship-bridge collision accident for ambient excitation with traffic loading, ambient excitation without traffic loading, and impulse excitation.

Publication Date

1-1-2015

Publication Title

Conference Proceedings of the Society for Experimental Mechanics Series

Volume

3

Number of Pages

113-133

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/978-3-319-15224-0_12

Socpus ID

84945575924 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84945575924

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