TY - JOUR
T1 - Response characteristics of the DeepCwind floating wind turbine moored by a Single-Point Mooring system
AU - Liu, Yingyi
AU - Yoshida, Shigeo
AU - Yamamoto, Hiroshi
AU - Toyofuku, Akinori
AU - He, Guanghua
AU - Yang, Shunhan
N1 - Funding Information:
Acknowledgments: The first author gratefully thanks the financial support from the Q-PIT Support Program for Young Researchers (Grant Number 18112), the Overseas Collaborative Research Program (Grant Number PJT-8) of the Japan Society of Naval Architects and Ocean Engineers (JASNAOE) and Grant-in-Aid for Early-Career Scientists (JSPS KAKENHI Grant Number JP18K13939) for his research. The authors are grateful to the guidance and help from Dr. Jason Jonkman of NREL and Dr. Marco Masciola of Siemens Gamesa during the course of this study.
Funding Information:
Funding: A small part of the APC (60 CHF) was funded by the Kyushu University Platform of Inter/Transdisciplinary Energy Research (Q-PIT) Support Program for Young Researchers (Grant Number 18112).
Publisher Copyright:
© 2018 by the authors.
PY - 2018/11/20
Y1 - 2018/11/20
N2 - In recent years, the SPM (Single-Point Mooring) concept has been widely employed in several branches of the naval architecture and marine engineering field, such as FPSOs (Floating Production, Storage and Offloading units), offshore oil rigs, etc., but not yet popular in the offshore wind energy. To investigate the response characteristics of an SPM-moored FWT (Floating Wind Turbine), in the present work, we perform a numerical study on the DeepCwind semisubmersible wind turbine, using the state-of-the-art open-source tool FAST. The free-decay test results show that the SPM layout affects the natural periods of the wind turbine in rotational modes, as well as the mooring stiffness of the diagonal rotational and crossing rotational-translational terms, especially in relation to the yaw mode. Comparisons of the RAOs (Response Amplitude Operators) elucidate that the presence of wind influences significantly the sway, roll and yaw motions of the SPM layout. Finally, the weathervane test shows that an asymmetry exists in the free-yaw motion response when the semisubmersible wind turbine is moored by an SPM system.
AB - In recent years, the SPM (Single-Point Mooring) concept has been widely employed in several branches of the naval architecture and marine engineering field, such as FPSOs (Floating Production, Storage and Offloading units), offshore oil rigs, etc., but not yet popular in the offshore wind energy. To investigate the response characteristics of an SPM-moored FWT (Floating Wind Turbine), in the present work, we perform a numerical study on the DeepCwind semisubmersible wind turbine, using the state-of-the-art open-source tool FAST. The free-decay test results show that the SPM layout affects the natural periods of the wind turbine in rotational modes, as well as the mooring stiffness of the diagonal rotational and crossing rotational-translational terms, especially in relation to the yaw mode. Comparisons of the RAOs (Response Amplitude Operators) elucidate that the presence of wind influences significantly the sway, roll and yaw motions of the SPM layout. Finally, the weathervane test shows that an asymmetry exists in the free-yaw motion response when the semisubmersible wind turbine is moored by an SPM system.
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U2 - 10.3390/app8112306
DO - 10.3390/app8112306
M3 - Article
AN - SCOPUS:85056987896
SN - 2076-3417
VL - 8
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
IS - 11
M1 - 2306
ER -