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Structural optimization

, Volume 8, Issue 4, pp 242–250 | Cite as

Neurocomputing strategies in structural design — decomposition based optimization

  • Z. P. Szewczyk
  • P. Hajela
Technical Papers

Abstract

The present paper introduces a scheme utilizing neurocomputing strategies for a decomposition approach to large scale optimization problems. In this scheme the modelling capabilities of a backpropagation neural network are employed 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 (decomposable systems), independent optimization in each subsystem is performed with a penalty term added to an objective function to eliminate constraint violations in all other subsystems. Dependencies among subsystems are represented in terms of global design variables, and since only partial information is needed, a neural network is used to map relations between global variables and all system constraints. A featuresensitive network (a variant of ahierarchical vector quantization technique, referred to as the HVQ network) is used for this purpose as it offers easy training, approximations of an arbitrary accuracy, and processing of incomplete input vectors. The approach is illustrated with applications to minimum weight sizing of truss structures with multiple design constraints.

Keywords

Vector Quantization Constraint Violation Scale Optimization Truss Structure Quantization Technique 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • Z. P. Szewczyk
    • 1
  • P. Hajela
    • 1
  1. 1.Department of Mechanical Engineering, Aerospace Engineering & MechanicsRensselaer Polytechnic InstituteTroyUSA

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