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Approximate techniques of structural reanalysisA study is made of two approximate techniques for structural reanalysis. These include Taylor series expansions for response variables in terms of design variables and the reduced-basis method. In addition, modifications to these techniques are proposed to overcome some of their major drawbacks. The modifications include a rational approach to the selection of the reduced-basis vectors and the use of Taylor series approximation in an iterative process. For the reduced basis a normalized set of vectors is chosen which consists of the original analyzed design and the first-order sensitivity analysis vectors. The use of the Taylor series approximation as a first (initial) estimate in an iterative process, can lead to significant improvements in accuracy, even with one iteration cycle. Therefore, the range of applicability of the reanalysis technique can be extended. Numerical examples are presented which demonstrate the gain in accuracy obtained by using the proposed modification techniques, for a wide range of variations in the design variables.
Document ID
19740056307
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Noor, A. K.
Lowder, H. E.
(George Washington University Center; NASA, Langley Research Center Hampton, Va., United States)
Date Acquired
August 7, 2013
Publication Date
August 1, 1974
Publication Information
Publication: Computers and Structures
Volume: 4
Subject Category
Structural Mechanics
Accession Number
74A39057
Distribution Limits
Public
Copyright
Other

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