TY - JOUR
T1 - Output-only identification of rigid body motions of floating structures: a case study
T2 - 10th International Conference on Structural Dynamics, EURODYN 2017
AU - Ruzzo, C.
AU - Failla, G.
AU - Collu, M.
AU - Nava, V.
AU - Fiamma, V.
AU - Arena, F.
N1 - Publisher Copyright:
© 2017 The Authors. Published by Elsevier Ltd.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Operational Modal Analysis
KW - Output-only dynamic identification
KW - Enhanced Frequency Domain Decomposition method
KW - Floating spar structures
KW - Operational Modal Analysis
KW - Output-only dynamic identification
KW - Enhanced Frequency Domain Decomposition method
KW - Floating spar structures
UR - http://www.scopus.com/inward/record.url?scp=85029907719&partnerID=8YFLogxK
U2 - 10.1016/j.proeng.2017.09.243
DO - 10.1016/j.proeng.2017.09.243
M3 - Conference article
SN - 1877-7058
VL - 199
SP - 930
EP - 935
JO - Procedia Engineering
JF - Procedia Engineering
Y2 - 10 September 2017 through 13 September 2017
ER -