Model Updating of Dynamic Systems Using Structural Reanalysis Method

Kyoung Bong Han; Doo Yong Cho

doi:10.4028/www.scientific.net/AMM.365-366.268

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 365-366Model Updating of Dynamic Systems Using Structural...

Model Updating of Dynamic Systems Using Structural Reanalysis Method

Abstract:

Model updating methodologies are invariably successful when used on noise-free simulated data, but tend to be unpredictable when presented with real experimental data that are unavoidably corrupted with uncorrelated noise content. In this paper, reanalysis using frequency response functions for correlating and updating dynamic systems is presented. A transformation matrix is obtained from the relationship between the complex and the normal frequency response functions of a structure. The transformation matrix is employed to calculate the modified damping matrix of the system. The modified mass and stiffness matrices are identified from the normal frequency response functions by using the least squares method. A numerical example is employed to illustrate the applicability of the proposed method. The result indicates that the present method is effective.

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Periodical:

Applied Mechanics and Materials (Volumes 365-366)

Pages:

268-272

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.365-366.268

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Online since:

August 2013

Authors:

Kyoung Bong Han, Doo Yong Cho

Keywords:

Damping Matrix, Frequency Response Functions, Model Updating, Reanalysis, Transformation Matrix

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