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2 results on '"Floating spar structures"'

1. Output-only identification of rigid body motions of floating structures: a case study.

Author

Ruzzo, C., Failla, G., Collu, M., Nava, V., Fiamma, V., and Arena, F.

Subjects
RIGID body mechanics, MODAL analysis, CIVIL engineering, DECOMPOSITION method, FREQUENCIES of oscillating systems
Abstract

In order to identify rigid body motions of floating offshore structures, output-only techniques are very useful for developing low-cost intermediate-scale experimental activities directly into the sea, instead of wave tanks. A crucial parameter, however, is the length of the response records used as input for the identification process, since short records may result in significant loss of accuracy, while long ones may be incompatible with the assumption of stationarity of the sea state. This work presents a sensitivity study conducted on a numerical model of a spar structure, identified by means of Enhanced Frequency Domain Decomposition method. An overview on the efficiency of the method is given for various lengths of response record, along with practical indications on the minimum values acceptable. [ABSTRACT FROM AUTHOR]

Published
2017
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2. Output-only identification of rigid body motions of floating structures: a case study

Author

Carlo Ruzzo, Giuseppe Failla, Felice Arena, Vincenzo Fiamma, Maurizio Collu, and Vincenzo Nava

Subjects
Engineering, Output-only dynamic identification, Floating spar structures, business.industry, 020209 energy, Enhanced Frequency Domain Decomposition method, Process (computing), Operational Modal Analysis, 02 engineering and technology, General Medicine, Structural engineering, Sea state, Rigid body, Identification (information), 0202 electrical engineering, electronic engineering, information engineering, Sensitivity (control systems), Spar, business, Frequency domain decomposition, TC
Abstract

In order to identify rigid body motions of floating offshore structures, output-only techniques are very useful for developing low-cost intermediate-scale experimental activities directly into the sea, instead of wave tanks. A crucial parameter, however, is the length of the response records used as input for the identification process, since short records may result in significant loss of accuracy, while long ones may be incompatible with the assumption of stationarity of the sea state. This work presents a sensitivity study conducted on a numerical model of a spar structure, identified by means of Enhanced Frequency Domain Decomposition method. An overview on the efficiency of the method is given for various lengths of response record, along with practical indications on the minimum values acceptable.

Published
2017

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