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International Journal of Optimaization in Civil Engineering، جلد ۱۰، شماره ۴، صفحات ۵۷۱-۵۹۴
عنوان فارسی
چکیده فارسی مقاله
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عنوان انگلیسی DAMAGE DETECTION IN THIN PLATES USING A GRADIENT-BASED SECOND-ORDER NUMERICAL OPTIMIZATION TECHNIQUE
چکیده انگلیسی مقاله The purpose of the present study is the damage detection in the thin plates in terms of the wide application of such structures in various branches of engineering such as structural, mechanical, aerospace, shipbuilding, etc. using gradient-based second-order numerical optimization techniques. The technique used for optimization in this study is the second-order Levenberg-Marquardt algorithm (SOLMA). Using the acceleration response in a number of structural nodes under dynamic excitation, identification of the location and extent of damage in the plate elements are obtained by the proposed algorithm over an iterative cycle and by updating the sensitivity matrix. The damage has been assumed in the form of decreased modulus of elasticity in linear mode. A numerical problem has been solved and presented in order to verify and compare the proposed damage detection method with other methods. Also several numerical problems have been solved and its results have been presented in order to evaluate different scenarios such as one or more damages, small or large damage extent, absence or presence of noise with different levels, number of measured responses (number of sensors), position of measured points and the dynamic analysis time of the damage detection problem with the proposed method. The results show the appropriate accuracy, efficiency and performance of the proposed damage detection method.
کلیدواژه‌های انگلیسی مقاله damage detection, inverse problem, thin plates, second-order gradient technique, dynamic excitation, acceleration response.
نویسندگان مقاله | M.R. Mohammadizadeh


| E. Jahanfekr


| S. Shojaee


نشانی اینترنتی http://ijoce.iust.ac.ir/browse.php?a_code=A-10-66-280&slc_lang=en&sid=1
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زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Applications
نوع مقاله منتشر شده پژوهشی
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