Reduced Model Approximation Approach Using Model Updating Methodologies
Publication: Journal of Engineering Mechanics
Volume 144, Issue 3
Abstract
Model reduction has been performed for several decades to allow for correlation of an analytical model to experimental data at a reduced number of points; however, traditional approaches have limitations. Static stiffness matrix reduction methods (e.g., Guyan) may not accurately capture the system dynamics, while techniques based on mode shapes [e.g., the system equivalent reduction expansion process (SEREP)] may experience rank deficiency issues. A new model reduction approach presented herein addresses these limitations by combining the accuracy of SEREP with the full-rank attributes of Guyan reduction. The advantages of the presented methodology over traditional reduction techniques are showcased via analytical studies on a cantilevered beam and general plate-type structure.
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Acknowledgments
Some of the work presented herein was partially funded by Air Force Research Laboratory Award No. FA8651-10-1-0009, “Development of Dynamic Response Modeling Techniques for Linear Modal Components.” Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the particular funding agency. The authors are grateful for the support obtained.
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Published In
Journal of Engineering Mechanics
Volume 144 • Issue 3 • March 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 1, 2016
Accepted: Sep 15, 2017
Published online: Jan 11, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 11, 2018
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