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IMPROVED DAMAGE IDENTIFICATION METHOD BASED ON MODAL INFORMATION

✍ Scribed by J.-T. KIM; N. STUBBS

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
237 KB
Volume
252
Category
Article
ISSN
0022-460X

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✦ Synopsis

In this paper, a newly derived algorithm to predict locations and severities of damage in structures using changes in modal characteristics is presented. First, two existing algorithms of damage detection are reviewed and the new algorithm is formulated in order to improve the accuracy of damage localization and severity estimation by eliminating erratic assumptions and limits in the existing algorithms. Next, the damage prediction accuracy is numerically assessed for each algorithm when applied to a two-span continuous beam for which pre-and post-damage modal parameters are available for only a few modes of vibration. Compared to the existing damage detection algorithms, the new algorithm improved the accuracy of damage localization and severity estimation results in the test beam.

2002 Elsevier Science Ltd.

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