کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
754106 895800 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A Comparison of Deterministic, Reliability-Based Topology Optimization under Uncertainties
ترجمه فارسی عنوان
مقایسۀ بهینه سازی توپولوژی مبتنی بر قابلیت اطمینان بر اساس عدم قطعیت
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی

Reliability and optimization are two key elements for structural design. The reliability-based topology optimization (RBTO) is a powerful and promising methodology for finding the optimum topologies with the uncertainties being explicitly considered, typically manifested by the use of reliability constraints. Generally, a direct integration of reliability concept and topology optimization may lead to computational difficulties. In view of this fact, three methodologies have been presented in this study, including the double-loop approach (the performance measure approach, PMA) and the decoupled approaches (the so-called Hybrid method and the sequential optimization and reliability assessment, SORA). For reliability analysis, the stochastic response surface method (SRSM) was applied, combining with the design of experiments generated by the sparse grid method, which has been proven as an effective and special discretization technique. The methodologies were investigated with three numerical examples considering the uncertainties including material properties and external loads. The optimal topologies obtained using the deterministic, RBTOs were compared with one another; and useful conclusions regarding validity, accuracy and efficiency were drawn.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Mechanica Solida Sinica - Volume 29, Issue 1, February 2016, Pages 31-45