Reality based optimization of steel monopod offshore-towers:
In this work, the implementation of reliability-based optimization (RBO) of a circular steel monopod-offshore-tower with constant and variable diameters (represented by segmentations) and thicknesses is presented. The tower is subjected to the extreme wave loading. For this purpose, the deterministi...
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fttno:oai:tudelft.nl:uuid:e7325b47-06d6-4f58-a625-b7a29ac7ed43 2023-05-15T14:23:54+02:00 Reality based optimization of steel monopod offshore-towers: Vrouwenvelder, A.C.W.M. 2008-01-01 http://resolver.tudelft.nl/uuid:e7325b47-06d6-4f58-a625-b7a29ac7ed43 en eng uuid:e7325b47-06d6-4f58-a625-b7a29ac7ed43 331743 http://resolver.tudelft.nl/uuid:e7325b47-06d6-4f58-a625-b7a29ac7ed43 Proceedings of the ASME 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008, June 15-20, Estoril, Portugal, 10 Architecture article 2008 fttno 2022-04-10T15:52:09Z In this work, the implementation of reliability-based optimization (RBO) of a circular steel monopod-offshore-tower with constant and variable diameters (represented by segmentations) and thicknesses is presented. The tower is subjected to the extreme wave loading. For this purpose, the deterministic optimization of the tower is performed with constraints including stress, buckling, and the lowest natural frequency firstly. Then, a reliabilrty-based optimization of the tower is performed. The reliability index is calculated from FORM using a limit state function based on the lowest natural frequency. The mass of the tower is considered as being the objective function; the thickness and diameter of the crosssection of the tower are taken as being design variables of the optimization. The numerical strategy employed for performing the optimization uses the IMSl-Libraries routine that is based on the Sequential Quadratic Programming (SQP). In addition, to check the results obtained from aforementioned procedure, the RBO of the tower is also performed using the genetic algorithms (GA) tool of the MAILAB. Finally, a demonstration of an example monopod tower is presented. Article in Journal/Newspaper Arctic TU Delft: Institutional Repository (Delft University of Technology) |
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TU Delft: Institutional Repository (Delft University of Technology) |
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English |
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Architecture |
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Architecture Vrouwenvelder, A.C.W.M. Reality based optimization of steel monopod offshore-towers: |
topic_facet |
Architecture |
description |
In this work, the implementation of reliability-based optimization (RBO) of a circular steel monopod-offshore-tower with constant and variable diameters (represented by segmentations) and thicknesses is presented. The tower is subjected to the extreme wave loading. For this purpose, the deterministic optimization of the tower is performed with constraints including stress, buckling, and the lowest natural frequency firstly. Then, a reliabilrty-based optimization of the tower is performed. The reliability index is calculated from FORM using a limit state function based on the lowest natural frequency. The mass of the tower is considered as being the objective function; the thickness and diameter of the crosssection of the tower are taken as being design variables of the optimization. The numerical strategy employed for performing the optimization uses the IMSl-Libraries routine that is based on the Sequential Quadratic Programming (SQP). In addition, to check the results obtained from aforementioned procedure, the RBO of the tower is also performed using the genetic algorithms (GA) tool of the MAILAB. Finally, a demonstration of an example monopod tower is presented. |
format |
Article in Journal/Newspaper |
author |
Vrouwenvelder, A.C.W.M. |
author_facet |
Vrouwenvelder, A.C.W.M. |
author_sort |
Vrouwenvelder, A.C.W.M. |
title |
Reality based optimization of steel monopod offshore-towers: |
title_short |
Reality based optimization of steel monopod offshore-towers: |
title_full |
Reality based optimization of steel monopod offshore-towers: |
title_fullStr |
Reality based optimization of steel monopod offshore-towers: |
title_full_unstemmed |
Reality based optimization of steel monopod offshore-towers: |
title_sort |
reality based optimization of steel monopod offshore-towers: |
publishDate |
2008 |
url |
http://resolver.tudelft.nl/uuid:e7325b47-06d6-4f58-a625-b7a29ac7ed43 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Proceedings of the ASME 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008, June 15-20, Estoril, Portugal, 10 |
op_relation |
uuid:e7325b47-06d6-4f58-a625-b7a29ac7ed43 331743 http://resolver.tudelft.nl/uuid:e7325b47-06d6-4f58-a625-b7a29ac7ed43 |
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1766296362192732160 |