International Journal of Optimization in Civil Engineering
عنوان نشریه
Iran University of Science & Technology
Engineering & Technology
http://ijoce.iust.ac.ir
18
agent2
2228-7558
doi
en
jalali
1395
10
1
gregorian
2017
1
1
7
1
online
1
fulltext
en
OPTIMIZATION FORMULATION FOR NONLINEAR STRUCTURAL ANALYSIS
Optimal design
Optimal design
پژوهشي
Research
<p>In this paper, the effect of angle between predictor and corrector surfaces on the structural analysis is investigated. Two objective functions are formulated based on this angle and also the load factor. Optimizing these functions, and using the structural equilibrium path’s geometry, lead to two new constraints for the nonlinear solver. Besides, one more formula is achieved, which was previously found by other researchers, via a different mathematical process. Several benchmark structures, which have geometric nonlinear behavior, are analyzed with the proposed methods. The finite element method is utilized to analyze these problems. The abilities of suggested schemes are evaluated in tracing the complex equilibrium paths. Moreover, comparison study for the required number of increments and iterations is performed. Results reflect the robustness of the authors’ formulations.</p>
optimization, path-following analysis, geometric nonlinear behavior, constraint equality, load-displacement curve, limit points.
109
127
http://ijoce.iust.ac.ir/browse.php?a_code=A-10-66-129&slc_lang=en&sid=1
M.
Rezaiee-Pajand
`180031947532846001068`

180031947532846001068
Yes
H.
Afsharimoghadam
`180031947532846001069`

180031947532846001069
No