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Dual methods and approximation concepts in structural synthesisApproximation concepts and dual method algorithms are combined to create a method for minimum weight design of structural systems. Approximation concepts convert the basic mathematical programming statement of the structural synthesis problem into a sequence of explicit primal problems of separable form. These problems are solved by constructing explicit dual functions, which are maximized subject to nonnegativity constraints on the dual variables. It is shown that the joining together of approximation concepts and dual methods can be viewed as a generalized optimality criteria approach. The dual method is successfully extended to deal with pure discrete and mixed continuous-discrete design variable problems. The power of the method presented is illustrated with numerical results for example problems, including a metallic swept wing and a thin delta wing with fiber composite skins.
Document ID
19810005835
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Fleury, C. (California Univ. Los Angeles, CA, United States)
Schmit, L. A., Jr. (California Univ. Los Angeles, CA, United States)
Date Acquired
September 4, 2013
Publication Date
December 1, 1980
Publication Information
Publisher: NASA
Subject Category
Structural Mechanics
Report/Patent Number
NASA-CR-3226
Accession Number
81N14347
Funding Number(s)
CONTRACT_GRANT: NSG-1490
PROJECT: RTOP 505-33-63-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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