Improving interval analysis in finite element calculations by means of affine arithmetic

被引：148
作者：
Degrauwe, D. [1 ]
Lombaert, G. [1 ]
De Roeck, G. [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Civil Engn, B-3001 Louvain, Belgium
来源：
COMPUTERS & STRUCTURES | 2010年 / 88卷 / 3-4期
关键词：
Uncertainty modeling; Interval analysis; Dependency problem; Affine arithmetic; ANTI-OPTIMIZATION; STRUCTURAL DESIGN; UNCERTAINTY; MECHANICS;
D O I：
10.1016/j.compstruc.2009.11.003
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Interval-based uncertainty models have proven to be well-suited for structural safety engineering with few data at hand. The practical use of interval analysis is hindered by the dependency problem, which leads to an overestimation of the uncertainty on the results. Affine arithmetic is a generalization of interval arithmetic that accounts for the relation between variables. By circumventing the dependency problem, it yields more accurate results. This paper presents a novel method to solve affine systems of linear equations, which allows for the application of affine arithmetic in finite element analysis. The proposed procedure is illustrated with three applications. (C) 2009 Elsevier Ltd. All rights reserved.
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页码：247 / 254
页数：8
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