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An Effective Approach for Damage Identification in Beam-Like Structures Based on Modal Flexibility Curvature and Particle Swarm Optimization | ||
| Journal of Rehabilitation in Civil Engineering | ||
| مقاله 9، دوره 8، شماره 1 - شماره پیاپی 17، اردیبهشت 2020، صفحه 109-120 اصل مقاله (846.5 K) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2019.553.1081 | ||
| نویسندگان | ||
| Siavash Nadjafi* 1؛ Gholamreza Ghodrati Amiri2؛ Ali Zare Hosseinzadeh2؛ Seyed Ali Seyed Razzaghi3 | ||
| 1Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran | ||
| 2Center of Excellence for Fundamental Studies in Structural Engineering, School of Civil Engineering, Iran University of Science & Technology | ||
| 3Department of Civil Engineering, Payame Noor University | ||
| تاریخ دریافت: 04 مهر 1393، تاریخ بازنگری: 03 فروردین 1398، تاریخ پذیرش: 24 مهر 1398 | ||
| چکیده | ||
| In this paper, a computationally simple approach for damage localization and quantification in beam-like structures is proposed. This method is in consonance with applying modal flexibility curvature (MFC) and particle swarm optimization (PSO) algorithm. Analytical studies in the literature have revealed that changes in the modal flexibility curvature can be considered as a sensitive and suitable criterion for identifying damage in the beam-like structures. Modal flexibility curvature can be calculated utilizing central difference approximation, based on entries of the modal flexibility matrix. The PSO algorithm, as a powerful optimization tool, is employed in order to minimize the error function which is formulated as an error function between the measured modal flexibility curvatures of the damaged structure and those calculated from the analytical structure. To demonstrate the efficiency of the method, two beam-like structures under different damage scenarios are studied. In addition, the robustness of presented method is investigated only when the first several modal data are available. It is observed that the proposed approach is able to localize and quantify various damage cases only by a few lower vibrational modes and also, it is low-sensitive to measurement noise. | ||
| کلیدواژهها | ||
| Damage Identification؛ Modal Flexibility Curvature؛ Particle Swarm Optimization (PSO)؛ Measurement Noise؛ Beam-Like Structure | ||
| مراجع | ||
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