نویسندگان

دانشگاه سیستان و بلوچستان

چکیده

اخیراً طراحی براساس شبیه‌سازی وزنی به‌عنوان یک روش مؤثر جهت طرح بهینه برمبنای قابلیت اطمینان گسترش یافته است. علی‌رغم سادگی، این روش از دقت کافی جهت محاسبه پاسخ بهینه برای مسائل طراحی بهینه برمبنای قابلیت اطمینان با ابعاد بالا برخوردار نیست. همچنین، دامنه کاربرد این روش محدود به مسائل طراحی بهینه با متغیرهای تصادفی است. در این تحقیق، از استراتژی جستجوی محلی جهت افزایش دقت روش طراحی براساس شبیه‌سازی وزنی به‌همراه کاهش حجم محاسبات استفاده شده است. همچنین یک استراتژی انتقال، جهت افزایش دامنه کاربرد روش فوق برای بررسی مسائل کلی طراحی بهینه، ارائه شده است. کارآمدی روش‌های پیشنهادی با حل مسائل مختلف مورد ارزیابی قرار گرفته است. مقایسه نتایج به‌دست آمده با حل دقیق بیانگر دقت و برتری روش پیشنهادی برای حل مسائل مختلف مهندسی است.

کلیدواژه‌ها

عنوان مقاله [English]

Reliability-Based Design Optimization of Structures using Modified Weighted Simulation Method

نویسندگان [English]

  • N. Safaeian Hamzeh Kolaei
  • M. Miri
  • M. Rashki

چکیده [English]

Weighted Simulation-based Design Method (WSDM) is recently developed as an efficient method for Reliability-
Based Design Optimization (RBDO). Despite simplicity, this method degrades effectiveness to obtain accurate optimum design for
high dimension RBDO. Besides, its application range is restricted to RBDOs including only random design variables. In the
present study, local search strategy is employed to enhance the accuracy of conventional WSDOM, and to reduce the computational cost. Besides, a shifting strategy is proposed to increase the application range of WSDM for handling general RBDO problems. The efficiency of the proposed methods is investigated by solving some structural reliability problems.
Comparisonof the obtained results with exact solutions confirms accuracy and superiority of the proposed method for
solving various engineering problems.

کلیدواژه‌ها [English]

  • Optimum Design
  • Reliability
  • Weighted simulation
  • Local search
  • Shift vector
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