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Finite Element Analysis of Structures with Interval Parameters

Published online by Cambridge University Press:  05 May 2011

W. Gao
W. Gao*
Affiliation:
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW2052, Australia
*
*Postdoctoral Research Fellow
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Abstract

This paper present a new method called the interval factor method for the finite element analysis of truss structures with interval parameters. Using the interval factor method, the structural parameters and loads can be considered as interval variables, and the structural stiffness matrix can then be divided into the product of two parts corresponding to its deterministic value and the interval factors. The computational expressions for lower and upper bounds, mean value and interval change ratio of structural placement and stress responses are derived from the static governing equations by means of the interval operations. The effect of the uncertainty of the structural parameters and loads on the structural static responses is demonstrated by truss structures.

Keywords

Finite element analysisInterval parametersInterval factor methodTruss structures.

Information

Type
Articles
Information
Journal of Mechanics , Volume 23 , Issue 1 , March 2007, pp. 79 - 85
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2007

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