Sizing and shape design sensitivity analysis using a hybrid finite element code

Abstract A numerical implementation of sizing and shape design sensitivity analysis of structural systems is presented, using the versatility and convenience of an existing finite element structural analysis code and its database management system. The finite element code used in the implementation presented is the Engineering Analysis Language (EAL), which is based on a hybrid method of analysis. Design sensitivity computations are carried out using the database management system of EAL, without writing a separate program and a separate database. Accurate design sensitivity results are obtained without the uncertainty of numerical accuracy associated with selection of finite difference perturbations. Sizing design parameters, such as crossectional area of beams and thickness of plates, and shape design parameters are considered in this paper. Structural performance measures considered include displacement and stress.

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