Title: Structural health monitoring using optimising algorithms based on flexibility matrix approach and combination of natural frequencies and mode shapes

Authors: Sh. Zamani Mehrian; S.A. Razavian Amrei; M. Maniat; S.M. Nowruzpour

Addresses: Mechanical Engineering Department, Texas A&M University, College Station, 77840, USA ' Department of Civil Engineering, Iran University of Science and Technology, Tehran, Iran ' Department of Civil Engineering, University of Memphis, Memphis, TN, 38152, USA ' Mechanical Engineering Department, Texas A&M University, College Station, 77840, USA

Abstract: In this paper, two methods, including flexibility matrix and combination of natural frequencies and mode shapes, are employed to detect the damage location and its severity by creating objective function, which is defined based on differences between the mathematical model and real structure. The damage of structures is modelled by a reduction in the elasticity modulus of the element. The finite element updating approaches used to make an optimisation problem to minimise objective function. In this study, particle swarm optimisation and charged system search as two novel algorithms are taken to find the best optimisation. A few damaged structures with different scenarios are solved to show superiority of each method over another.

Keywords: damage detection; finite element method; FEM; charge system search; particle swarm optimisation; PSO; objective function; structural health monitoring; flexibility matrix; natural frequencies; mode shapes; damage location; mathematical modelling; structural engineering; modulus of elasticity.

DOI: 10.1504/IJSTRUCTE.2016.079287

International Journal of Structural Engineering, 2016 Vol.7 No.4, pp.398 - 411

Received: 01 Sep 2015
Accepted: 27 Oct 2015

Published online: 16 Sep 2016 *

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