Skip to main content
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
A. J. Goupee, B. Koo, R. W. Kimball, K. F. Lambrakos, and H. J. Dagher, “ Experimental comparison of three floating wind turbine concepts,” J. Offshore Mech. Arct. Eng. 136, 020906 (2014).
Y. G. Tang, K. Song, and B. Wang, “ Experiment study of dynamics response for wind turbine system of floating foundation,” China Ocean Eng. 29, 835846 (2015).
Y. H. Kim, S. Y. Hong, and B. W. Nam, “ A numerical study of the motin and structural responses of interlinked spars in irregular waves,” J. Ocean Wind Energy 1(3), 161169 (2014).
J. M. Jonkman and M. L. Buhl, Jr., “ FAST user's guide,” Technical Report No. NREL/EL-500-382300, 2005.
T. J. Larsen and A. M. Hansen, “ HAWC2 user manual,” Riø National Laboratory, Technical University of Denmark, Denmark, Report No. Risø-R-1597, 2008.
G. Stewart, M. Lackner, A. Roberston, A. Jonkman, and A. Goupee, “ Calibration and validation of a FAST floating wind turbine model of the DeepCwind scaled tension-leg platform,” in Proceedings of the 22nd International Offshore and Polar Engineering Conference, Rhodes, Greece (2012).
J. R. Browning, J. Jonkman, A. Robertson, and A. J. Goupee, “ Calibration and validation of the FAST dynamic simulation tool for a spar-type floating offshore wind turbine,” in Proceedings of 2012 the Science of Making Torque from Wind Conference, Oldenburg, Germany (2012).
A. J. Coulling, A. J. Goupee, and A. N. Robertson, “ Validation of a FAST semi-submersible floating wind turbine numerical model with DeepCwind test data,” J. Renewable Sustainable Energy 5, 023116 (2013).
M. Karimirad, “ Modeling aspects of a floating wind turbine for coupled wave-wind-induced dynamic analyses,” Renewable Energy 53, 299305 (2013).
M. Karimirad and C. Michailides, “ V-shaped semisubmersible offshore wind turbine: An alternative concept for offshore wind technology,” Renewable Energy 83, 126143 (2015).
M. Masciola, A. Robertson, J. Jonkman, A. Coulling, and A. Goupee, “ Assessment of the importance of mooring dynamics on the global response of the DeepCwind floating semisubmersible offshore wind turbine,” in Proceedings of 23rd International Offshore and Polar Engineering Conference, Anchorage, Alaska, USA (2013).
J. V. D. Tempel and W. de Vries, “ Frequency domain calculations of offshore wind turbine response to wind and wave loads,” in European Offshore Wind Conference and Exhibition 2005, Copenhagen, Denmark (2005).
B. Yeter, Y. Garbatov, and C. G. Soares, “ Fatigue damage assessment of fixed offshore wind turbine tripod support structures,” Eng. Struct. 101, 518528 (2015).
W. B. Dong, T. Moan, and Z. Gao, “ Long-term fatigue analysis of multi-planar tubular joints for jacket-type offshore wind turbine in time domain,” Eng. Struct. 33, 20022014 (2011).
M. I. Kvittem and T. Moan, “ Time domain analysis procedures for fatigue assessment of a semi-submersible wind turbine,” Mar. Struct. 40, 3859 (2015).
Det Norske Veritas, DNV-RP-J103, Design of Floating Wind Turbine Structures ( DNV, 2013).
IEC, Standard 61400-3, Wind Turbine-Part 3: Design Requirements for Offshore Wind Turbines ( IEC International, 2009).
K. Johannessen, T. S. Meling, and S. Haver, “ Joint distribution for wind and waves in the Northern North Sea,” in Proceedings of the Eleventh International Offshore and Polar Engineering Conference, Stavanger, Norway (2001).
B. J. Jonkman and L. Kilcher, TurbSim user's guide 2012.
A. Robertson, J. Jonkman, and M. Masciola, “ Definition of the semisubmersible floating system for phase II of OC4,” Technical Report No. NREL/TP-5000-60601 (2014).
M. Hall and A. Goupee, “ Validation of a lumped-mass mooring line model with DeepCwind semisubmersible model test data,” Ocean Eng. 104, 590603 (2015).
T. J. Larsen and T. D. Hanson, “ A method to avoid negative damped low frequent tower vibration for floating, pitch controlled wind turbine,” in The Second Conference on the Science of Making Torque from Wind, Copenhagen, Denmark (2007).
J. Jonkman, “ Definition of the floating system for phase IV of OC3,” Technical Report No. NREL/TP-500-47535, National Renewable Energy Laboratory, 2010.
W. E. Cummins, “ The impulse response function and ship motions,” Schiffstechnik 47, 101109 (1962).
A. J. Coulling, A. J. Goupee, A. N. Robertson, and J. M. Jonkman, “ Importance of second-order difference-frequency wave-diffraction forces in the validation of a FAST semi-submersible floating wind turbine model,” in Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering, Nantes, France (2013).
J. W. Li, Y. G. Tang, and C. R. W. Yeung, “ Effects of second-order difference-frequency wave forces on a new floating platform for an offshore wind turbine,” J. Renewable Sustainable Energy 6, 033102 (2014).
I. Bayati, J. Jonkman, A. Robertson, and A. Platt, “ The effects of second-order hydrodynamics on a semisubmersible floating offshore wind turbine,” J. Phys. 524, 012094 (2014).
Det Norske Veritas, DNV-OS-J101, Design of Offshore wind Turbine Structures ( DNV, 2011).
M. A. Miner, “ Cumulative damage in fatigue,” J. Appl. Mech. 12(3), 159164 (1945).
T. Fischer, W. Vries, P. Rainey, B. Schmidt, K. Argyriadis, and M. Kühn, “ Offshore support structure optimization by means of integrated design and controls,” Wind Energy 15(1), 99117 (2012).
L. Barj, S. Stewart, G. Stewart, M. Lackner, J. Jonkman, A. Robertson et al., Impact of Wind/Wave Misalignment in the Loads Analysis of a Floating Wind Turbine ( The American Wind Energy Association (AWEA) WINDPOWER, 2013).
J. Jonkman, S. Butterfield, W. Musial, and G. Scott, “ Definition of a 5-MW reference wind turbine for offshore system development,” Technical Report No. NREL/EL-500-38060, 2009.

Data & Media loading...


Article metrics loading...



Fully coupled analysis of a semisubmersible-type floating offshore wind turbine is carried out for the fatigue damage investigation at tower base by using the code FAST. By combining the axial force and the bending moment, the stress around the circumference can be calculated. This study investigates the effect of second order wave force, wind load, mooring model, and tower elasticity on the stress response at tower base. There are three peaks in the stress amplitude spectrum, corresponding to pitch resonance, wave frequency, and first-order natural mode of the tower, respectively. The first and third peaks are mainly induced by wind load. The effect of the second order wave force and mooring model on the stress seems to be neglectable based on the numerical results. By using the rainflow counting method, the fatigue damage is calculated. The obtained fatigue damage under several environmental conditions indicates that the misalignment and coupling effect of wind and wave loads may significantly affect the total fatigue damage. The wind and wave induced responses are calculated separately (uncoupled method). Next, two superposition methods for fatigue damage calculation are analyzed: fatigue damage superposition and stress superposition. Compared with the fully coupled analysis considering wind and wave together, the former gives lower prediction but the latter seems to provide acceptable results. Finally, considering the long-term wind and wave distribution, the fatigue damage under different environmental conditions is calculated, and the fatigue damage obtained from stress superposition method shows reasonable agreement with that obtained from a fully coupled analysis.


Full text loading...


Access Key

  • FFree Content
  • OAOpen Access Content
  • SSubscribed Content
  • TFree Trial Content
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd