Research Article
Oct 1976
Optimum Structural Design with Dynamic Constraints
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 102, Issue 10
Abstract
Dynamic response quantities, treated parametrically in time, are included in the problem for the first time. The method is made efficient by the use of the following approximation concepts: (1)Design variable linking; (2)time parametric constraint deletion; and (3)use of the first-order Taylor series expansions of the dynamic response functions with respect to the design variables. It is found that the feasible design space in an optimum structural design problem in the dynamic response regime is usually disjoint. The Davidon-Fletcher-Powell algorithm is used for the unconstrained minimizations. To successfully implement the exterior penalty function with approximate constraints, dummy boundaries and a new concept of move limits are introduced. It is found that the sinusoidal contributions in the relation between design variables and dynamic response functions can cause infeasible minima of the exterior penalty function.
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Published In
Journal of the Structural Division
Volume 102 • Issue 10 • October 1976
Pages: 2053 - 2071
Copyright
© 1976 American Society of Civil Engineers.
History
Published in print: Oct 1976
Published online: Feb 1, 2021
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Authors
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Juan H. Cassis
Prof. of Civ. Engrg., Univ. of Chile, Santiago, Chile; formerly, Grad. Fellow, Univ. of California, Los Angeles, Calif.
Lucien A. Schmit Jr., F.ASCE
Prof. of Engrg. and Applied Sci., Univ. of California, Los Angeles, Calif.
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