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Research Conducted at Sydney University of Technology Has Updated Our Knowledge about Computer-Aided Design (A Non-probabilistic Reliability-based...

July 22, 2014

Research Conducted at Sydney University of Technology Has Updated Our Knowledge about Computer-Aided Design (A Non-probabilistic Reliability-based Optimization of Structures Using Convex Models)

By a News Reporter-Staff News Editor at Journal of Mathematics -- Investigators discuss new findings in Computer-Aided Design. According to news reporting out of Sydney, Australia, by VerticalNews editors, research stated, "This paper aims to propose a non-probabilistic reliability-based multi-objective optimization method for structures with uncertain-but-bounded parameters. A combination of the interval and ellipsoid convex models is used to account for the different groups of uncertain parameters, in which the interval model accounts for uncorrelated parameters, while the ellipsoid model is applied to correlated parameters."

Our news journalists obtained a quote from the research from the Sydney University of Technology, "The design is then formulated as a nested double-loop optimization problem. A multi-objective genetic algorithm is used in the out loop optimization to optimize the design vector for evaluating the objectives, and the Sequential Quadratic Programming (SQP) algorithm is applied in the inner loop to evaluate the uncertain vector and non-probabilistic reliability index. Since the double-loop process for most engineering problems is computationally prohibitive, the polynomial response surface method (RSM) is applied to construct a surrogate model for the approximation of the objective functions and constraints, in order to improve the computational efficiency. In this way, a new reliability-based optimization method is established as a nature combination of the non-probabilistic multi-objective optimization method using convex models with the surrogate model."

According to the news editors, the research concluded: "Typical numerical examples and a practical engineering application are used to demonstrate the effectiveness of the proposed optimization method."

For more information on this research see: A Non-probabilistic Reliability-based Optimization of Structures Using Convex Models. Cmes-Computer Modeling in Engineering & Sciences, 2013;95(6):423-452. Cmes-Computer Modeling in Engineering & Sciences can be contacted at: Tech Science Press, 6825 Jimmy Carter Blvd, Ste 1850, Norcross, GA 30071, USA.

Our news journalists report that additional information may be obtained by contacting F.Y. Li, Sydney University of Technology, Sch Mech & Mechatron Syst, Sydney, NSW 2007, Australia. Additional authors for this research include Z. Luo, J.H. Rong and L. Hu.

Keywords for this news article include: Sydney, Engineering, Computer-Aided Design, Australia and New Zealand

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Source: Journal of Mathematics

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