Model Conversion Technique for Structural Dynamic Systems
Publication: Journal of Structural Engineering
Volume 134, Issue 10
Abstract
This technical note introduces a novel model conversion technique for structural dynamic systems that is capable of converting a physically realizable, higher-order model (termed the source model) into a completely different, predefined, physically realizable, lower-order model (termed the target model). Upon the complexion of the conversion, the resulting target model preserves or approximates the dynamic characteristics—the chosen structural frequencies and their mode shapes—of the source model. Mathematically, the procedure to implement the model conversion technique is like a model updating approach, which is fundamentally different from that used in traditional model reduction schemes. A numerical example of converting a five-story two-dimensional frame structure model into a five-story classical/generalized one-dimensional shear-building model is demonstrated.
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Acknowledgments
The second writer acknowledges financial support by the 863-project of China (Program No. 2006AA09Z331), and by the National Natural Science Foundation of China (Grant Number NSF50739004).
References
Ewins, D. J. (2000). Modal testing: Theory, practice and application, 2nd Ed., Research Studies Press, Baldock, Hertfordshire, England.
Friswell, M. I., and Mottershead, J. E. (1995). Finite element model updating in structural dynamics, Kluwer Academic, Dordrecht, The Netherlands.
Hu, S. L. J., Li, H., and Wang, S. (2007). “Cross-model cross-mode method for model updating.” Mech. Syst. Signal Process., 21(4), 1690–1703.
Paz, M. (1991). Structural dynamics: Theory and computation, 3rd Ed., Van Nostrand Reinhold, New York.
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© 2008 American Society of Civil Engineers.
History
Received: Dec 6, 2005
Accepted: Feb 19, 2008
Published online: Oct 1, 2008
Published in print: Oct 2008
Notes
Note. Associate Editor: Abhinav Gupta
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