Smart Structures and Systems, Volume (23), No (1), Year (2019-1) , Pages (45-60)

Title : ( An iterative method for damage identification of skeletal structures utilizing biconjugate gradient method and reduction of search space )

Authors: Ebrahim Sotoudehnia , Farzad Shahabian Moghadam , Ahmad Aftabi Sani ,

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Abstract

This paper is devoted to proposing a new approach for damage detection of structures. In this technique, the biconjugate method -BCG- is employed. To remedy the noise effects, a new preconditioning algorithm is applied. The proposed preconditioner matrix significantly reduces the condition number of the system. Moreover, based on the characteristics of the damage vector, a new direct search algorithm is employed to increase the efficiency of the suggested damage detection scheme by reducing the number of unknowns. To corroborate the high efficiency and capability of the presented strategy, it is applied for estimating the severity and location of damage in the well-known 31-member and 52-member trusses. In this process, the noisy time history responses measured by a limited number of sensors. The results of numerical examples reveal high accuracy and robustness of the proposed method.

Keywords

damage detection; Model updating; Biconjugate gradient; Preconditioning; Approximated pseudo inverse; Condition number
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@article{paperid:1072709,
author = {Sotoudehnia, Ebrahim and Shahabian Moghadam, Farzad and Aftabi Sani, Ahmad},
title = {An iterative method for damage identification of skeletal structures utilizing biconjugate gradient method and reduction of search space},
journal = {Smart Structures and Systems},
year = {2019},
volume = {23},
number = {1},
month = {January},
issn = {1738-1584},
pages = {45--60},
numpages = {15},
keywords = {damage detection; Model updating; Biconjugate gradient; Preconditioning; Approximated pseudo inverse; Condition number},
}

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%0 Journal Article
%T An iterative method for damage identification of skeletal structures utilizing biconjugate gradient method and reduction of search space
%A Sotoudehnia, Ebrahim
%A Shahabian Moghadam, Farzad
%A Aftabi Sani, Ahmad
%J Smart Structures and Systems
%@ 1738-1584
%D 2019

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