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Detection of spring support locations in elastic structures using a gradient-based finite element model updating technique

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Title Detection of spring support locations in elastic structures using a gradient-based finite element model updating technique
 
Creator SINHAT, JK
MUJUMDAR, PM
MOORTHY, RIK
 
Subject damage detection
crack location
flexibility
identification
sensitivity
frequency
methodology
 
Description A methodology is presented for detection of the location of simple translational spring supports in elastic structures by non-destructive and non-intrusive means, based on measured natural frequencies of the structure. A gradient-based finite element (FE) model updating technique has been used for such detection. Measured modal data along with an initially correlated FE model are used. The present study is a new application of an existing FE model updating technique. The proposed method involves the detection of spring support locations by updating the position parameters of the support in the FE model through the optimization of an error criterion based on the difference between measured and computed natural frequencies of the structural system. The location of the support appears explicitly as an updating parameter in the formulation of the problem. Three different numerical schemes for computation of the gradient of the eigenvalue derivative with respect to the support location have been evaluated. The results and various limitations observed while developing the current method have been presented through numerical examples and a simple experimental example.
 
Publisher ACADEMIC PRESS LTD
 
Date 2011-07-12T20:31:03Z
2011-12-26T13:02:46Z
2011-12-27T05:49:38Z
2011-07-12T20:31:03Z
2011-12-26T13:02:46Z
2011-12-27T05:49:38Z
2001
 
Type Article
 
Identifier JOURNAL OF SOUND AND VIBRATION, 240(3), 499-518
0022-460X
http://dx.doi.org/10.1006/jsvi.2000.3237
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3527
http://hdl.handle.net/10054/3527
 
Language en