Comparison of damage detection results utilizing an ARMA model and an FRF model to extract the modal parameters

Gabriel V. Garcia; Roberto A. Osegueda; David Meza

doi:10.1117/12.310614

17 June 1998 Comparison of damage detection results utilizing an ARMA model and an FRF model to extract the modal parameters

Gabriel V. Garcia, Roberto A. Osegueda, David Meza

Author Affiliations +

Proceedings Volume 3325, Smart Structures and Materials 1998: Smart Systems for Bridges, Structures, and Highways; (1998) https://doi.org/10.1117/12.310614
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

The objective of this paper is to make a comparison of the damage detection results obtained from an analysis of the modal parameters extracted from a time domain model and a frequency domain model. In this paper, an autoregressive moving average (ARMA) model and a FRF model will be utilized to extract the modal parameters of a beam. Expressions for the modal parameters using the ARMA model are developed. Next, an established theory of damage localization, which yields information on the location of the damage directly from changes in mode shapes, is selected. Expressions for classification algorithms using the damage indicator functions from the damage localization theory are then generated. Using the classification algorithms, damage localization is attempted for a pinned-pinned beam which contains damage of various degrees. Finally, the modal parameters and damage detection results obtained from the two methods are compared.

Citation Download Citation

Gabriel V. Garcia, Roberto A. Osegueda, and David Meza "Comparison of damage detection results utilizing an ARMA model and an FRF model to extract the modal parameters", Proc. SPIE 3325, Smart Structures and Materials 1998: Smart Systems for Bridges, Structures, and Highways, (17 June 1998); https://doi.org/10.1117/12.310614

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