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Journal of Ocean University of China : Volume 16, Issue 1, February 2017

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Mode shape identification using residues of measured offshore structure data

Content Provider	Springer Nature Link
Author	Wang, Chao Liu, Fushun Lu, Hongchao
Copyright Year	2017
Abstract	Compared to traditional mode shape identification methods such as eigensystem realization algorithm (ERA), this article proposes a mode shape identification method based on estimated residues of measured data and the theoretical relationship between the estimated residues and the mode shapes from the state space model is obtained by defining a coefficient matrix. A mass-spring model with five degrees of freedom (DOFs) is utilized to demonstrate the approach. The numerical results indicate that the estimated residues are the mode shapes of structures, but with a coefficient matrix to maintain consistency with the mode shapes from the ERA. Using MATLAB a complicated numerical jacket platform is built to further study the proposed method. The results show that mode shapes consistent with those from the ERA could be obtained by taking the defined coefficient matrix into account, which is also demonstrated by a physical beam model that was built at Ocean University of China.
Starting Page	200
Ending Page	208
Page Count	9
File Format	PDF
ISSN	16725182
Journal	Journal of Ocean University of China
Volume Number	16
Issue Number	2
e-ISSN	19935021
Language	English
Publisher	Science Press
Publisher Date	2017-03-07
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	mode shape residue Prony-based method eigensystem realization algorithm offshore structures Oceanography Meteorology
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering

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