نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیات علمی گروه مهندسی آب دانشگاه زنجان

2 دانشجوی کارشناسی ارشد سازه های آبی دانشگاه زنجان

چکیده

در این مطالعه، عملکرد روش­های بهینه­سازی تکاملی برای طراحی مقطع سدهای خاکی ناهمگن بررسی شده است. این روش­ها عبارت­اند از: الگوریتم دسته ماهی­های مصنوعی (AFSA)، الگوریتم تکامل ترکیبی مجموعه (SCE) و الگوریتم نورد شبیه­سازی شده (SA). این مسأله به­صورت یک تابع بهینه­سازی غیرخطی با اعمال قیود متفاوتی نظیر محدودیت­های پایداری شیب و ابعاد هندسی فرمول­بندی شد. متغیرهای طراحی در فرآیند بهینه­سازی، پارامترهای هندسی مقطع سد خاکی هستند و قیود ضرایب اطمینان پایداری از نتایج تحلیل‏هایی مانند تحلیل تراوش و پایداری شیروانی­ها برای مجموعه­ای از طرح­های نمونه و به­کمک مدل‏های رگرسیونی خطی به­صورت توابعی صریح بر حسب متغیرهای طراحی تعیین گردید. کارایی روش­های بهینه­سازی در تعیین نقطۀ بهینه سراسری، بر حسب میانگین عملکرد و متوسط زمان لازم برای محاسبات با یکدیگر مقایسه ­شد. پس از بهینه­سازی ابعاد سد برزک با استفاده از روش­های SCE،AFSA وSA، حجم سد به­میزان 38، 37 و 30 درصد نسبت به طرح اولیه کاهش یافته است. بر اساس نتایج به­­دست آمده، در دستیابی به ابعاد بهینه مقطع سد خاکی روش SCEنسبت به روش­های SAو AFSAکارایی بهتری دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Performance Comparison of Artificial Fish Swarm, Shuffled Complex Evolution and Simulated Annealing Algorithms in the Optimization of Earth Dams Cross Section (Case Study: Barzok Dam)

نویسنده [English]

  • Fahime Vakili Tanha 2

چکیده [English]

In this study performance of evolutionary optimization methods for designing of cross section of heterogeneous earth dams is investigated. The methods applied were Artifical Fish Swarm (AFSA), Shuffled Complex Evolution (SCE) and Simulated Annealing (SA) algorithms. The model consisted of a nonlinear optimization function by applying different constraints such as slope stability constraints and geometrical dimensions. Design variables in optimization process were the geometrical parameters in cross section of earthen dam and stability safety factors constraints were determined as explicit functions according to design variables by using analyses results such as seepage and slopes stability analysis for a set of sample designs by using linear regression models. Efficiency of the optimization methods in identifying the global optimum point was compared according to mean performance and mean time required for calculations. After optimization of dimensions in Barzok dam by using SCE, AFSA and SA methods, dam volume was reduced 38, 37 and 30 percent respectively as compared to the primary design volume. Results showed that SCE method is more efficient than the SA and AFSA methods in achieving the optimal dimensions in cross section of earth dam.
 
Keywords: Artificial Fish Swarm, Earth Dam, Optimization, Shuffled Complex Evolution, Simulated Annealing

کلیدواژه‌ها [English]

  • Artificial Fish Swarm
  • Earth Dam
  • optimization
  • Shuffled Complex Evolution
  • Simulated Annealing
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