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Updating large models for mechanical systems using incomplete modal measurement
Yuen K.-V.
2012
Source PublicationMechanical Systems and Signal Processing
ISSN8883270
Volume28Pages:297
Abstract

The problem of model updating for mechanical or structural systems is addressed by using incomplete modal measurement. The proposed method requires only the modal frequencies and mode shapes at some selected degrees of freedom for a few modes. The method updates the mass and stiffness matrix without imposing any parameterization and it utilizes the information from both the nominal finite-element model and the modal data. The method is computationally efficient as neither iteration nor numerical optimization is required. It does not require computation of the complete set of eigenvalues and eigenvectors of the nominal model. Instead, only the ones corresponding to the observed modes are needed. The method first updates the modal frequencies. Then, an efficient algorithm is presented to construct a transformation matrix. This matrix is used to correct the nominal eigenvectors so that the updated model is compatible with the measurement of the eigenvectors. A twelve-degree-of-freedom truss is used to provide insights of the proposed method. Finally, a 1600-degree-of- freedom spring-mass system is considered to illustrate the efficiency of the proposed method for large structure. © 2011 Elsevier Ltd. All rights reserved.

KeywordEigenvalue Problem Modal Data Model Updating Response Prediction Structural Health Monitoring System Identification
DOI10.1016/j.ymssp.2011.08.005
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Mechanical
WOS IDWOS:000301549900020
The Source to ArticleScopus
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Cited Times [WOS]:34   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
AffiliationUniv Macau, Fac Sci & Technol, Macao, Peoples R China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Yuen K.-V.. Updating large models for mechanical systems using incomplete modal measurement[J]. Mechanical Systems and Signal Processing,2012,28:297.
APA Yuen K.-V..(2012).Updating large models for mechanical systems using incomplete modal measurement.Mechanical Systems and Signal Processing,28,297.
MLA Yuen K.-V.."Updating large models for mechanical systems using incomplete modal measurement".Mechanical Systems and Signal Processing 28(2012):297.
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