Research Article
Jan 1971
Automated Design of Frame Structures
Authors: Dag Kavlie and Johannes MoeAuthor Affiliations
Publication: Journal of the Structural Division
Volume 97, Issue 1
Abstract
Methods of automated design and optimization of statically indeterminate frames by means of nonlinear programming are reviewed, with particular emphasis on the sequential unconstrained minimization technique (SUMT) employed by the writers. In this approach the proper choice of initial response factor is of particular importance in cases with several local optima. An extended penalty function technique allows infeasible initial designs. When a computer with 60 bits word length is used, gradient directions may be obtained with sufficient accuracy employing a single step finite difference scheme. Efficient interpolation and reanalysis techniques are incorporated in order to reduce required computer time. Considerable reduction in numerical effort is also obtained employing a scheme of suboptimization. The developed algorithm performs well for several complex test examples including problems for which the feasible region is nonconvex, and local optima are present.
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Published In
Journal of the Structural Division
Volume 97 • Issue 1 • January 1971
Pages: 33 - 62
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Jan 1971
Published online: Feb 1, 2021
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Authors
Affiliations
Dag Kavlie
Lic. Techn., The Technical University of Norway, Trondheim, Norway
Johannes Moe
Prof. Dr. Techn., Dept. of Ship Structures, The Technical University of Norway, Trondheim, Norway
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