کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6915748 1447406 2018 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Robust topology optimization under multiple independent unknown-but-bounded loads
ترجمه فارسی عنوان
بهینه سازی توپولوژیستی قوی تحت چندین بار مستقل ناشناخته اما محدود
کلمات کلیدی
طراحی قوی، عدم قطعیت طراحی، بهینه سازی توپولوژی، بهینه سازی ساختاری، بدترین طراحی مورد، بارهای نامعلوم اما محدود،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
The optimal designs obtained from the deterministic topology optimization without considering the loading uncertainties may become vulnerable, or even lead to catastrophic failures. A two-level optimization formulation is often used in the Robust Topology Optimization (RTO) under uncertain loads. Various approaches have been reported to identify the critical loads associated with the worst structure responses. Because Convex Model approaches apply convex approximations to the original non-convex model at the lower level, the optimal designs obtained by these methods are greatly dependent on the quality of the approximation. In this paper, a new formulation based on the Wolfe duality for the RTO problems with multiple independent unknown-but-bounded loads is proposed. Following the two-level formulation, the lower level optimization problem for the worst multiple independent uncertain loading case is transformed by the Wolfe duality. Both the first order necessary conditions and the second order sufficient conditions are derived rigorously to validate the solution optimality despite of the non-convexity associated with the lower level formulation. Numerical examples are also presented to demonstrate the proposed approach.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 329, 1 February 2018, Pages 464-479
نویسندگان
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