Accelerated random search method for dynamic FE model updating

Touat, Noureddine; Pyrz, Mariusz; Rechak, Saïd

doi:10.1108/02644400710755861

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…It has been stated previously (Touat 2008;Touat, Pyrz, and Rechak 2007) that the first strategy turns out to be hard, since it uses a large number of updating parameters. The second strategy requires fewer p-values to be updated with respect to the first one.…”

Section: Encodingmentioning

confidence: 99%

“…Although each parameter has been suggested in separated articles (Appel, Labarre, and Radulovic 2004;Touat, Pyrz, and Rechak 2007), some trials are necessary to select them simultaneously and for the specific problem. The parameter values determined after some tests are shown in Table 1, and they will be adopted in the examples of Section 4 and 5.…”

Section: Parameter Values Of the Accelerated Pseudo-genetic Algorithmmentioning

confidence: 99%

“…The algorithm has shown very good ability at hill climbing for optimum solutions, and its convergence speed is very fast (Appel, Labarre, and Radulovic 2004;Touat, Pyrz, and Rechak 2007).…”

Section: Introductionmentioning

confidence: 99%

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An accelerated pseudo-genetic algorithm for dynamic finite element model updating

Touat

Benseddiq²,

Ghoul

et al. 2013

Engineering Optimization

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An effective accelerated pseudo-genetic algorithm (APGA), which combines an adaptive pseudo-genetic algorithm (P-GA) with an accelerated random search (ARS) method, is proposed to update finite element (FE) models in the presence of measured data. The algorithm explores the higher probability of converging to a global solution provided by genetic algorithms and the accelerated hill-climbing ability given by ARS. The objective of the optimization problem is to minimize the difference between measured and numerical FE vibration data. The effectiveness of the approach is first tested on mathematical benchmark functions. The best version of APGA is then applied to a simulated beam structure to test the applicability of the new approach for FE model updating. Finally, the algorithm is applied to update two real structures using measured modal data. The application of this new algorithm obtains results that correlate well with experiments in reduced time.

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Section: Encodingmentioning

confidence: 99%

Section: Parameter Values Of the Accelerated Pseudo-genetic Algorithmmentioning

confidence: 99%

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An accelerated pseudo-genetic algorithm for dynamic finite element model updating

Touat

Benseddiq²,

Ghoul

et al. 2013

Engineering Optimization

Self Cite

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“…In this area, there are the bee algorithm [25], the modified Cuckoo optimization algorithm [26], artificial neural networks [27], and genetic algorithms [28]. Recently, Boubakir et al [29] improved the accelerated random search algorithm of (Touat et al [30]) and applied it for the detection of damage in the beams. However, the disadvantage of these methods is in the search for the position and the depth at the same time.…”

Section: Introductionmentioning

confidence: 99%

Crack Detection through the Change in the Normalized Frequency Shape

Dahak¹,

Touat²,

Benkedjouh³

2018

Vibration

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Abstract:The objective of this work is to use natural frequencies for the localization and quantification of cracks in beams. First, to study the effect of the crack on natural frequencies, a finite element model of Euler-Bernoulli is presented. Concerning the damaged element, the stiffness matrix is calculated by the theory of fracture mechanics, by inverting the flexibility matrix. Then, in order to detect damage, we are going to show that the shape given by the change in the natural frequencies is as function of the damage position only. Thus, the crack is located by the correlation between the shape of the measured frequencies and those obtained by the finite elements, where the position that gives the calculated shape which is the most similar to the measured one, indicates the crack position. After the localization, an inverse method will be applied to quantify the damage. Finally, an experimental application is presented to show the real applicability of the method, in which the crack is introduced by using an Electrical Discharge Machining. The results confirm the applicability of the method for the localization and the quantification of cracks.

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“…[26][27][28][29][30][31][32][33] Levin and Lieven 26 introduced the genetic algorithm (GA) and simulated annealing for finite-element-model updating. Marwala [34][35][36] successfully applied three separate genetic algorithms to minimize the distance between the measured data and the finite-element predicted data. Touat et al 37 proposed an accelerated random search algorithm for model updating.…”

Section: Introductionmentioning

confidence: 99%

Application of Improved Accelerated Random Search Algorithm for Structural Damage Detection

Boubakir¹,

Touat²,

Kharoubi³

et al. 2017

IJAV

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Finite element (FE) model updating technique belongs to the class of inverse problems in classical mechanics. According to the continuum damage mechanics, damage is represented by a reduction factor of the element stiffness and mass. The objective of the optimization problem is to minimize the difference between measured and numerical FE vibration data. In this study a new method is presented for structural damage detection called Improved Modified Accelerated Random Search algorithm (IMARS). The algorithm uses model updating procedure to detect damages in a decoupled fashion. First, detecting the location and the number of damaged elements is evaluated by multi-run process. Knowing damage number, the quantification step is then applied using simple computing procedure. The effectiveness of the algorithm is first tested on mathematical benchmark functions. The algorithm is then applied in damage detection of 2D beam structure and 2D truss structure. These two cases have different boundary conditions and different damage scenarios. The simulated experimental modal data have been taken as reference values. A real cantilever beam with experimental modal parameters is used to validate the proposed method for real single and double damages. Results show that the proposed method is accurate and robust in structural damage identification.

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Accelerated random search method for dynamic FE model updating

Abstract: This paper seeks to present a new solution algorithm for updating of finite element models in structural dynamics. A random search method is applied to improving the correlation between the numerical simulation and the measured experimental data

Cited by 7 publications

References 26 publications

An accelerated pseudo-genetic algorithm for dynamic finite element model updating

An accelerated pseudo-genetic algorithm for dynamic finite element model updating

Crack Detection through the Change in the Normalized Frequency Shape

Application of Improved Accelerated Random Search Algorithm for Structural Damage Detection

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