TY - JOUR
T1 - Operational modal analysis of a spar-type floating platform using frequency domain decomposition method
AU - Ruzzo, Carlo
AU - Failla, Giuseppe
AU - Collu, Maurizio
AU - Nava, Vincenzo
AU - Fiamma, Vincenzo
AU - Arena, Felice
N1 - Publisher Copyright:
© 2016 by the authors; licensee MDPI.
PY - 2016
Y1 - 2016
N2 - System identification of offshore floating platforms is usually performed by testing small-scale models in wave tanks, where controlled conditions, such as still water for free decay tests, regular and irregular wave loading can be represented. However, this approach may result in constraints on model dimensions, testing time, and costs of the experimental activity. For such reasons, intermediate-scale field modelling of offshore floating structures may become an interesting as well as cost-effective alternative in a near future. Clearly, since the open sea is not a controlled environment, traditional system identification may become challenging and less precise. In this paper, a new approach based on Frequency Domain Decomposition (FDD) method for Operational Modal Analysis is proposed and validated against numerical simulations in ANSYS AQWA v.16.0 on a simple spar-type structure. The results obtained match well with numerical predictions, showing that this new approach, opportunely coupled with more traditional wave tanks techniques, proves to be very promising to perform field-site identification of the model structures.
AB - System identification of offshore floating platforms is usually performed by testing small-scale models in wave tanks, where controlled conditions, such as still water for free decay tests, regular and irregular wave loading can be represented. However, this approach may result in constraints on model dimensions, testing time, and costs of the experimental activity. For such reasons, intermediate-scale field modelling of offshore floating structures may become an interesting as well as cost-effective alternative in a near future. Clearly, since the open sea is not a controlled environment, traditional system identification may become challenging and less precise. In this paper, a new approach based on Frequency Domain Decomposition (FDD) method for Operational Modal Analysis is proposed and validated against numerical simulations in ANSYS AQWA v.16.0 on a simple spar-type structure. The results obtained match well with numerical predictions, showing that this new approach, opportunely coupled with more traditional wave tanks techniques, proves to be very promising to perform field-site identification of the model structures.
KW - Damping of offshore structures
KW - Frequency Domain Decomposition
KW - Output-only system identification
UR - http://www.scopus.com/inward/record.url?scp=85014036533&partnerID=8YFLogxK
U2 - 10.3390/en9110870
DO - 10.3390/en9110870
M3 - Article
AN - SCOPUS:85014036533
SN - 1996-1073
VL - 9
JO - Energies
JF - Energies
IS - 11
M1 - 870
ER -