TY - JOUR
T1 - MATHEMATICAL AND TECHNICAL OPTIMA IN THE DESIGN OF WELDED STEEL SHELL STRUCTURES
TT -
JF - IUST
JO - IUST
VL - 1
IS - 1
UR - http://ijoce.iust.ac.ir/article-1-12-en.html
Y1 - 2011
SP - 141
EP - 153
KW - structural optimization
KW - circular and conical cylindrical shells
KW - cost calculation
KW - buckling of plates and shells
KW - economy of welded structures
N2 - 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.
M3
ER -