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RESEARCH PAPERS: Design Automation Papers

Implementation of Design Sensitivity Analysis with Existing Finite Element Codes

[+] Author and Article Information
K. K. Choi, J. L. T. Santos, M. C. Frederick

Center for Computer Aided Design and Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242

J. Mech., Trans., and Automation 109(3), 385-391 (Sep 01, 1987) (7 pages) doi:10.1115/1.3258807 History: Received September 16, 1985; Online November 19, 2009

Abstract

A numerical method is presented to implement structural design sensitivity analysis theory, using the versatility and convenience of existing finite element structural analysis programs. Design variables such as thickness and cross-sectional areas of components of individual members and built-up structures are considered. Structural performance functionals considered include displacement and stress. The method is also applicable for eigenvalue problem design sensitivity analysis. It is shown that calculations can be carried out outside existing finite element codes, using postprocessing data only. Thus design sensitivity analysis software does not have to be imbedded in an existing finite element code. Feasibility of the method is shown through analysis of several problems, including a built-up structure. Accurate design sensitivity results are obtained without the uncertainty of numerical accuracy associated with selection of finite difference perturbations.

Copyright © 1987 by ASME
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