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AN CHARACTERIZATION OF JACKET-TYPE OFFSHORE STRUCTURE BY OPERATIONAL MODAL ANALYSIS

Ortigão, A.; Martins, C. J.;

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Identification of dynamic structural characteristics in engineering by means of their responses to measured vibration is an important step for the correct characterization and monitoring of real structures. This article presents the results of a dynamic load test performed on the PG oil platform, located at Talara, Peru. The work included measurements of vibration in twelve positions on the platform, located on the floors of the structure. As excitation source, it was mainly due to wind action and wave motion, and thus the measurements were made without interruption of the structure operation. The collected data were analyzed using non-parametric technique of digital signal processing, which provided the main dynamic parameters of the structure. From there, we proceeded to the elaboration of a numerical model of the structure, based on the Finite Element Method, which represents accurately its structural behavior.

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Palavras-chave: Operational modal analysis, Dynamic load test, Structural characterization, Structural vibration, Offshore structure.,

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DOI: 10.5151/meceng-wccm2012-19640

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Como citar:

Ortigão, A.; Martins, C. J.; "AN CHARACTERIZATION OF JACKET-TYPE OFFSHORE STRUCTURE BY OPERATIONAL MODAL ANALYSIS", p. 3913-3926 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-19640

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