Neurocomputing strategies in decomposition based structural design
暂无分享,去创建一个
The present paper explores the applicability of neurocomputing strategies in decomposition based structural optimization problems. It is shown that the modeling capability of a backpropagation neural network can be used to detect weak couplings in a system, and to effectively decompose it into smaller, more tractable, subsystems. When such partitioning of a design space is possible, parallel optimization can be performed in each subsystem, with a penalty term added to its objective function to account for constraint violations in all other subsystems. Dependencies among subsystems are represented in terms of global design variables, and a neural network is used to map the relations between these variables and all subsystem constraints. A vector quantization technique, referred to as a z-Network, can effectively be used for this purpose. The approach is illustrated with applications to minimum weight sizing of truss structures with multiple design constraints.
[1] K. M. Riley,et al. Sensitivity of Optimum Solutions of Problem Parameters , 1982 .
[2] J. Sobieszczanski-Sobieski,et al. Structural optimization by multilevel decomposition , 1983 .
[3] U. Kirsch,et al. Multilevel optimal design of reinforced concrete structures , 1983 .
[4] R. Haftka. An Improved Computational Approach for Multilevel Optimum Design , 1984 .
[5] Uri Klrtch. An Improved Multilevel Structural Synthesis Method , 1985 .