Structural Damage Monitoring Using the Eigenvector Perturbation Method

Abstract:

This paper presents an improved method to detect structural damages only by changes of eigenvectors. The underlying principle of the proposed technique is to measure the eigenvectors of the damaged system, and then use this set of data as well as the original test data of undamaged system to identify structural damages with the help of eigenvector perturbation method. In this contribution, a simple accelerated formula is developed to improve the accuracy of the eigenvector perturbation method. With the introduction of the accelerated formula, the proposed method is able to achieve more accurate results than that obtained by the original eigenvector perturbation method without any high-order analysis or multi-iterations. The effectiveness of the proposed method is illustrated using simulated data on a numerical example. From the numerical results, it can be concluded that the proposed approach is simple to implement and can identify structural damages very accurately only by the first order sensitivity analysis of the eigenvector.

• Periodical: Advanced Materials Research (Volumes 838-841)
• Pages: 1996-1999
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.838-841.1996
• Online since: November 2013
• Authors: Na Li*, Qiu Wei Yang, Chao Feng Liang
• Keywords: Damage Monitoring, Eigenvector Perturbation, Sensitivity

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