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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 106
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Paper 124

Application of a Bounded-Variable Least-Squares Algorithm for Damage Detection based on Natural Frequencies Changes

M. Caretto, A. Messina and N.I. Giannoccaro

Dipartimento di Ingegneria dell'Innovazione, Università del Salento, Lecce, Italy

Full Bibliographic Reference for this paper
M. Caretto, A. Messina, N.I. Giannoccaro, "Application of a Bounded-Variable Least-Squares Algorithm for Damage Detection based on Natural Frequencies Changes", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 124, 2014. doi:10.4203/ccp.106.124
Keywords: damage detection, modal analysis, structural dynamics, finite element, inverse problem, constrained least-square algorithms..

The aim of this paper is to test the validity of a bounded variable least-squares (BVLS) algorithm in solving the problem of detecting the location and the extent of potential damaged sites in elastic structures by using the changes in their natural frequencies. In the work, described in this paper, the BVLS algorithm has been implemented and then tested as a new tool for identifying and quantifying damaged sites on the finite element model of a one side clamped beam. Several tests are illustrated evaluating the performances of this innovative approach in comparison with the NNLS and MDLAC algorithms in different conditions (including different extents of damage, different numbers and locations of damaged sites and different numbers of discretization elements). The results have been presented and discussed enabling the field of applicability to be clarified, the improvements and the limits of this new procedure in comparison with the established techniques.

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