Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification
Several structures are completely or partially manufactured in a factory and then transported to the final situation where they are going to be located. An accurate methodology to check the serviceability of the structure in the factory, previously to the transportation and final assembly, will dimi...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/3130292 |
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| _version_ | 1832547323233697792 |
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| author | G. Ismael M. López-Aenlle F. Pelayo A. Fernández-Canteli |
| author_facet | G. Ismael M. López-Aenlle F. Pelayo A. Fernández-Canteli |
| author_sort | G. Ismael |
| collection | DOAJ |
| description | Several structures are completely or partially manufactured in a factory and then transported to the final situation where they are going to be located. An accurate methodology to check the serviceability of the structure in the factory, previously to the transportation and final assembly, will diminish significantly the costs of validation of its dynamic behavior. The structural dynamic modification (SDM) can be used to predict the modal parameters of a supported structure from the experimental modal parameters corresponding to the same structure but tested in a configuration easy to reproduce in a factory, such as the free-free condition. However, the accuracy obtained with this technique depends on how well the boundary conditions modelled with the SDM replicate the real support conditions. In this paper the SDM theory is used to predict the modal parameters of a pinned-free beam, a cantilever beam, and a 3D steel beam structure from the experimental natural frequencies and mode shapes of the same structures tested in free-free configuration. The predictions provided by the SDM theory are validated by operational modal testing on the supported structures. It is shown how the aforementioned boundary conditions can be modelled with the SDM, and the accuracy provided by the technique is investigated. |
| format | Article |
| id | doaj-art-d3c4510266af448d83b48545f3f2f11e |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-d3c4510266af448d83b48545f3f2f11e2025-02-03T06:45:27ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/31302923130292Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic ModificationG. Ismael0M. López-Aenlle1F. Pelayo2A. Fernández-Canteli3Department of Construction and Manufacturing Engineering, University of Oviedo, 33203 Gijón, SpainDepartment of Construction and Manufacturing Engineering, University of Oviedo, 33203 Gijón, SpainDepartment of Construction and Manufacturing Engineering, University of Oviedo, 33203 Gijón, SpainDepartment of Construction and Manufacturing Engineering, University of Oviedo, 33203 Gijón, SpainSeveral structures are completely or partially manufactured in a factory and then transported to the final situation where they are going to be located. An accurate methodology to check the serviceability of the structure in the factory, previously to the transportation and final assembly, will diminish significantly the costs of validation of its dynamic behavior. The structural dynamic modification (SDM) can be used to predict the modal parameters of a supported structure from the experimental modal parameters corresponding to the same structure but tested in a configuration easy to reproduce in a factory, such as the free-free condition. However, the accuracy obtained with this technique depends on how well the boundary conditions modelled with the SDM replicate the real support conditions. In this paper the SDM theory is used to predict the modal parameters of a pinned-free beam, a cantilever beam, and a 3D steel beam structure from the experimental natural frequencies and mode shapes of the same structures tested in free-free configuration. The predictions provided by the SDM theory are validated by operational modal testing on the supported structures. It is shown how the aforementioned boundary conditions can be modelled with the SDM, and the accuracy provided by the technique is investigated.http://dx.doi.org/10.1155/2018/3130292 |
| spellingShingle | G. Ismael M. López-Aenlle F. Pelayo A. Fernández-Canteli Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification Shock and Vibration |
| title | Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification |
| title_full | Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification |
| title_fullStr | Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification |
| title_full_unstemmed | Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification |
| title_short | Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification |
| title_sort | dynamic behavior of supported structures from free free modal tests using structural dynamic modification |
| url | http://dx.doi.org/10.1155/2018/3130292 |
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