FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal Data
Marine industry requires continued development of new technologies in order to produce oil. An essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. In this study, structur...
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doaj-936f70aaf4494d9a8bcc3673ed22a6d82021-02-14T08:53:21ZengIranian Association of Naval Architecture and Marine EngineeringInternational Journal of Maritime Technology2345-60002476-53332016-02-015Winter and Spring 2016111FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal DataFarhad Hosseinlou0Alireza Mojtahedi1 University of Tabriz University of Tabriz Marine industry requires continued development of new technologies in order to produce oil. An essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. In this study, structural model updating may be defined as the fit of an existing analytical model in the light of measured vibration test. After fitting, the updated model is expected to represent the dynamic behavior of the jacket structure more precisely. In this way, current article presents a direct based updating study of a reduced scale four-story spatial frame jacket structure fabricated and tested at mechanical system and signal processing laboratory. Also, an efficient model updating process is presented with limited modal data, which uses modal data in order to improve the correlation between the experimental and analytical models. The proposed technique is computationally efficient since it does not require iterations. It updates the mass and stiffness matrix such that they are compatible with the modal data of the observed modes.http://ijmt.ir/article-1-457-en.htmloffshore jacket platformsmodel updatingsignal processingexperimental modal analysisimproved reduction system. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Farhad Hosseinlou Alireza Mojtahedi |
spellingShingle |
Farhad Hosseinlou Alireza Mojtahedi FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal Data International Journal of Maritime Technology offshore jacket platforms model updating signal processing experimental modal analysis improved reduction system. |
author_facet |
Farhad Hosseinlou Alireza Mojtahedi |
author_sort |
Farhad Hosseinlou |
title |
FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal Data |
title_short |
FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal Data |
title_full |
FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal Data |
title_fullStr |
FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal Data |
title_full_unstemmed |
FEM Updating for Offshore Jacket Structures Using Measured Incomplete Modal Data |
title_sort |
fem updating for offshore jacket structures using measured incomplete modal data |
publisher |
Iranian Association of Naval Architecture and Marine Engineering |
series |
International Journal of Maritime Technology |
issn |
2345-6000 2476-5333 |
publishDate |
2016-02-01 |
description |
Marine industry requires continued development of new technologies in order to produce oil. An essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. In this study, structural model updating may be defined as the fit of an existing analytical model in the light of measured vibration test. After fitting, the updated model is expected to represent the dynamic behavior of the jacket structure more precisely. In this way, current article presents a direct based updating study of a reduced scale four-story spatial frame jacket structure fabricated and tested at mechanical system and signal processing laboratory. Also, an efficient model updating process is presented with limited modal data, which uses modal data in order to improve the correlation between the experimental and analytical models.
The proposed technique is computationally efficient since it does not require iterations. It updates the mass and stiffness matrix such that they are compatible with the modal data of the observed modes. |
topic |
offshore jacket platforms model updating signal processing experimental modal analysis improved reduction system. |
url |
http://ijmt.ir/article-1-457-en.html |
work_keys_str_mv |
AT farhadhosseinlou femupdatingforoffshorejacketstructuresusingmeasuredincompletemodaldata AT alirezamojtahedi femupdatingforoffshorejacketstructuresusingmeasuredincompletemodaldata |
_version_ |
1724271244670402560 |