A combined heuristic optimization technique

Authors:
H. Schmidt;G. Thierauf
Affiliations:
Department of Civil Engineering, Institute of Structural Mechanics, University of Essen, Essen, Germany;Department of Civil Engineering, Institute of Structural Mechanics, University of Essen, Essen, Germany
Venue:
Advances in Engineering Software - Special issue on evolutionary optimization of engineering problems
Year:
2005

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Abstract

Realistic problems of structural optimization are characterized by non-linearity, non-convexity and by continuous and/or discrete design variables. There are non-linear dependencies between the optimised parameters. Real-world problems are rarely decomposable or separable. In this contribution a combined heuristic algorithm is described which is well suited for problems, for which the application-requirements of gradient-based algorithms are not fulfilled. The present contribution describes a combination of the Threshold Accepting Algorithm with Differential Evolution with particular emphasis on structural optimization, it can be classified as a Hybrid Evolutionary Algorithm. The Threshold Accepting Algorithm is similar to Simulated Annealing. Differential Evolution is based on Genetic Algorithms.