Structural Dynamic System Reconstruction Method for Vibrating Structures

[+] Author and Article Information
Hyeung-Yun Kim

Stanford University, Aeronautics and Astronautics Department, Stanford University, 496 Lomita Mall, Durand Building, Stanford, CA 94305, USAhyukim@stanford.edu

J. Dyn. Sys., Meas., Control 125(4), 646-653 (Jan 29, 2004) (8 pages) doi:10.1115/1.1605992 History: Received March 30, 2001; Revised February 14, 2003; Online January 29, 2004
Copyright © 2003 by ASME
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Eigenresolution for natural frequencies and damping ratios for the q-step prediction orders (nx=20)
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Frequency responses of the FEM analysis and the system identification model with one input and three outputs
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The singular values of the system matrices obtained by the reconstructed structural dynamic systems of nx=8 for the different numbers of IDFT samples
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The approximation error bounds by the singular values for different numbers of IDFT samples in the reconstructed structural dynamic systems of nx=8
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A schematic drawing of the vibration test set up
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Measured frequency response functions of the composite plates: [0\90]s,[45\−45\45\−45]s,[0\90\0\90]s, and [02\452\−452\902]s
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A comparison of frequency response functions for different methods
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Frequency response functions for differing nx in the present method
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Eigenresolution for natural frequencies and damping ratios for differing the system orders (q=200)



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