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Comparison of static response of structures using convex models and interval analysis method
Author(s) -
Qiu Zhiping
Publication year - 2003
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.636
Subject(s) - bounded function , interval (graph theory) , mathematics , ellipsoid , probabilistic logic , interval arithmetic , regular polygon , finite element method , displacement (psychology) , numerical analysis , mathematical optimization , algorithm , mathematical analysis , combinatorics , geometry , statistics , engineering , structural engineering , psychology , physics , astronomy , psychotherapist
In this paper, by combining the finite element analysis and non‐probabilistic convex models, we present the numerical algorithm of non‐probabilistic convex models and interval analysis method for the static displacement of structures with uncertain‐but‐bounded parameters. Under the condition of the box or interval vector determined from the ellipsoid of the uncertain‐but‐bounded structural parameter vector, by comparing the numerical algorithm of non‐probabilistic convex models and the interval analysis method in the mathematical proof and the numerical example, we can see that the width of the maximum or upper and minimum or lower bounds on the static displacement yielded by the numerical algorithm of non‐probabilistic convex models is tighter than those produced by the interval analysis method. Copyright © 2003 John Wiley & Sons, Ltd.