FDE index for goodness‐of‐fit between measured and calculated response signals |
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| Authors: | Jeff J Dragovich Andres Lepage |
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| Institution: | 1. National Institute of Standards and Technology, Building and Fire Research Laboratory (MS 8600), 100 Bureau Drive, Gaithersburg, MD 20899‐8600, U.S.A.;2. Department of Architectural Engineering, The Pennsylvania State University, University Park, PA, U.S.A. |
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| Abstract: | A method is presented for determining the goodness‐of‐fit between measured and calculated structural response signals. The method is termed as the frequency domain error (FDE) index, which is a value between 0 and 1 where zero indicates a perfect correlation. The FDE is calculated from the Fourier spectra of the measured and calculated waveforms, using a relatively simple calculation procedure, readily implemented using standard fast Fourier transform (FFT) libraries. The FDE is demonstrated herein using three different types of problems: simple harmonic waves, a large number of earthquake response simulations, and a set of limited simulations. Along with the FDE concept, effective methods for displaying the results are presented. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | model validation comparison metrics FFT |
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