RT - Journal Article
T1 - MATHEMATICAL AND TECHNICAL OPTIMA IN THE DESIGN OF WELDED STEEL SHELL STRUCTURES
JF - IUST
YR - 2011
JO - IUST
VO - 1
IS - 1
UR - http://ijoce.iust.ac.ir/article-1-12-en.html
SP - 141
EP - 153
K1 - structural optimization
K1 - circular and conical cylindrical shells
K1 - cost calculation
K1 - buckling of plates and shells
K1 - economy of welded structures
AB - 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.
LA eng
UL http://ijoce.iust.ac.ir/article-1-12-en.html
M3
ER -