Use of design optimization techniques in solving typical structural engineering related design optimization problems

作者：Fedorik Filip^*; Kala Jiri; Haapala Antti; Malaska Mikko

来源：Structural Engineering and Mechanics, 2015, 55(6): 1121-1137.

DOI：10.12989/sem.2015.55.6.1121

• design optimization
• First Order Method
• Subproblem Approximation Method
• feasible/infeasible design space
• robustness
• accuracy

High powered computers and engineering computer systems allow designers to routinely simulate complex physical phenomena. The presented work deals with the analysis of two finite element method optimization techniques (First Order Method-FOM and Subproblem Approximation Method-SAM) implemented in the individual Design Optimization module in the Ansys software to analyze the behavior of real problems. A design optimization is a difficult mathematical process, intended to find the minimum or maximum of an objective function, which is mostly based on iterative procedure. Using optimization techniques in engineering designs requires detailed knowledge of the analyzed problem but also an ability to select the appropriate optimization method. The methods embedded in advanced computer software are based on different optimization techniques and their efficiency is significantly influenced by the specific character of a problem. The efficiency, robustness and accuracy of the methods are studied through strictly convex two-dimensional optimization problem, which is represented by volume minimization of two bars. plane frame structure subjected to maximal vertical displacement limit. Advantages and disadvantages of the methods are described and some practical tips provided which could be beneficial in any efficient engineering design by using an optimization method.

• 出版日期2015-9-25