Volume 1, Number 1 (3-2011)                   2011, 1(1): 141-153 | Back to browse issues page


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Farkas J. MATHEMATICAL AND TECHNICAL OPTIMA IN THE DESIGN OF WELDED STEEL SHELL STRUCTURES. International Journal of Optimization in Civil Engineering. 2011; 1 (1) :141-153
URL: http://ijoce.iust.ac.ir/article-1-12-en.html

Abstract:   (3354 Views)
In some cases the optimum is the minimum of the objective function (mathematical optimum), but in other cases the optimum is given by a technical constraint (technical optimum). The present paper shows the both types in two problems. The first problem is to find the optimum dimensions of a ring-stiffened circular cylindrical shell subject to external pressure, which minimize the structural cost. The calculation shows that the cost decreases when the shell diameter decreases. The decrease of diameter is limited by a fabrication constraint that the diameter should be minimum 2 m to make it possible the welding and painting inside of the shell. The second problem is to find the optimum dimensions of a cantilever column loaded by compression and bending. The column is constructed as circular or conical unstiffened shell. The cost comparison of both structural versions shows the most economic one.
Full-Text [PDF 185 kb]   (1825 Downloads)    
Type of Study: Research | Subject: Optimal design
Received: 2011/10/24

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