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 Wilson Guachamin Acero,Zhen Gao,Torgeir Moan.Numerical Study of a Novel Procedure for Installing the Tower and Rotor Nacelle Assembly of Offshore Wind Turbines Based on the Inverted Pendulum Principle[J].Journal of Marine Science and Application,2017,(3):243-260.[doi:10.1007/s11804-017-1418-6]
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Numerical Study of a Novel Procedure for Installing the Tower and Rotor Nacelle Assembly of Offshore Wind Turbines Based on the Inverted Pendulum Principle


Numerical Study of a Novel Procedure for Installing the Tower and Rotor Nacelle Assembly of Offshore Wind Turbines Based on the Inverted Pendulum Principle
Wilson Guachamin Acero1234 Zhen Gao134 Torgeir Moan134
Wilson Guachamin Acero1234 Zhen Gao134 Torgeir Moan134
1. Department of Marine Technology, Norwegian University of Science and Technology, Trondheim NO-7491, Norway;
2. Departamento de Ingeniería Mecánica, Escuela Politécnica Nacional, Quito 17-01-2759, Ecuador;
3. Centre for Ships and Ocean Structures, Norwegian University of Science and Technology, Trondheim NO-7491, Norway
offshore wind turbine installationcrane vesselshielding effectscritical eventslimiting parametersinverted pendulumallowable sea states
Current installation costs of offshore wind turbines (OWTs) are high and profit margins in the offshore wind energy sector are low, it is thus necessary to develop installation methods that are more efficient and practical. This paper presents a numerical study (based on a global response analysis of marine operations) of a novel procedure for installing the tower and Rotor Nacelle Assemblies (RNAs) on bottom-fixed foundations of OWTs. The installation procedure is based on the inverted pendulum principle. A cargo barge is used to transport the OWT assembly in a horizontal position to the site, and a medium-size Heavy Lift Vessel (HLV) is then employed to lift and up-end the OWT assembly using a special upending frame. The main advantage of this novel procedure is that the need for a huge HLV (in terms of lifting height and capacity) is eliminated. This novel method requires that the cargo barge is in the leeward side of the HLV (which can be positioned with the best heading) during the entire installation. This is to benefit from shielding effects of the HLV on the motions of the cargo barge, so the foundations need to be installed with a specific heading based on wave direction statistics of the site and a typical installation season. Following a systematic approach based on numerical simulations of actual operations, potential critical installation activities, corresponding critical events, and limiting (response) parameters are identified. In addition, operational limits for some of the limiting parameters are established in terms of allowable limits of sea states. Following a preliminary assessment of these operational limits, the duration of the entire operation, the equipment used, and weather-and water depth-sensitivity, this novel procedure is demonstrated to be viable.


Bense MP, 2014. Comparison of numerical simulation and model test for integrated installation of GBS wind turbine. MD thesis, Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, Norway.
Century Dynamics-Ansys Inc, 2011. AQWA Reference manual Version 14.0.
Det Norske Veritas, 2010. Recommended practice DNV-RP-C205, Environmental Conditions and Environmental Loads.
Det Norske Veritas 2011. Recommended practice DNV-RP-H103, Modelling and Analysis of Marine Operations.
Det Norske Veritas, 2014. Offshore standard DNV-OS-H205, Lifting Operations.
Edelson D, Luo M, Halkyard J, Smiley D, 2008. Kikeh development:Spar topside floatover installation. Offshore Technology Conference OTC 19639. Houston, Texas.
El-Reedy MA, 2012. Offshore structures-design, construction and maintenance. Gulf Professional Publishing, Oxford, UK.
Graham H, (2010). Pivoting installation system and method for an offshore wind. Available from Espacenet [Accessed on May 23, 2015] Application number: WO2010US36241 20100526.
Guachamin Acero W, Gao Z, Moan T, 2016a. Assessment of the dynamic responses and allowable sea states for a novel offshore wind turbine tower and rotor nacelle assembly installation concept based on the inverted pendulum principle. Energy Procedia, 94.
DOI: 10.1016/j.egypro.2016.09.198.
Guachamin Acero W, Li L, Gao Z, Moan T, 2016b. Methodology for assessment of the operational limits and operability of marine operations. Ocean Engineering, 125, 308-327.
Guachamin Acero W, Moan T, Gao Z, 2015. Steady state motion analysis of an offshore wind turbine transition piece during installation based on outcrossing of the motion limit state.
Proceedings of the ASME 34th International Conference on Ocean and Arctic Engineering, St. John’s, NL, Canada.
DOI: 10.1115/OMAE2015-41142
Hamilton J, French R, Rawstron P, 2008. Topsides and jackets modeling for floatover installation design. Offshore Technology Conference OTC 19227, Houston, Texas.
Herman SA, 2002. Offshore Wind Farms - Analysis of Transport and Installation Costs. Tech. Rep. ECN-I-02-002, Energy research Centre of the Netherlands.
Huisman Equipment B.V., 2015. Wind turbine shuttle. Available from http://www.gaoh-offshore.com/js/tiny_mce/plugins/filemanager/files/A10-31000_Brochure_WTS_RevD.pdf [Accessed on April 5, 2015]. Jin K, Jo P, 2014. Floating crane and method for installation offshore crane tower. Available from Espacenet [Accessed on May 23, 2015] Application number: KR20130034461 20130329.
Jonkman J, Butterfield S, Musial W, Scott G, 2009. Definition of a 5 MW reference wind turbine for offshore system development.Tech. Rep. NREL/TP-500-38060, National Renewable Energy Laboratory NREL.
Ku N, Roh M-I, 2015. Dynamic response simulation of an offshore wind turbine suspended by a floating crane. Ships and Offshore Structures, 20(6), 621–634.
DOI: 10.1080/17445302.2014.942504
Lankhorst Ropes, 2015. Offshore steel wire ropes. Available from http://www.lankhorstropes.com/files/uploads/offshore/brochures/Steel_Wire_Rope_brochure100dpiApril_2013.pdf [Accessed on Nov. 29, 2015].
Li C, Gao Z, Moan T, Lu N, 2014a. Numerical simulation of transition piece-monopile impact during offshore wind turbine installation. Proceedings of The Twenty-fourth International Ocean and Polar Engineering Conference, Busan, Korea.
Li L, Gao Z, Moan T, Ormberg H, 2014b. Analysis of lifting operation of a monopile for an offshore wind turbine considering vessel shielding effects. Marine Structures, 39, 287-314.
Li L, Guachamin Acero W, Gao Z, Moan T, 2016c. Assessment of allowable sea states during installation of OWT monopiles with shallow penetration in the seabed. Journal of Offshore Mechanics and Arctic Engineering, 138(4), 041902.
Moné C, Smith A, Maples B, Hand M, 2013. Cost of wind energy review. Tech. rep., NREL/TP-5000-63267. Golden, Colorado:National Renewable Energy Laboratory.
Oosterlaak V, 2011. Lift operation a nonlinear time domain lift analysis. Available from http://www.ktf.no/fileadmin/Dokumenter/Kursdokumenter/2011/3_subsea_lifting_operations/10-template-lifting-operations.pdf[Accessed on Oct. 9, 2015]. Sarkar A, 2013. Offshore wind turbines supported by monopiles, installation technology, a passive damper and a study on the breaking wave induced vibrations. Available from http://www.uis.no/research-phd-education/research-news/new-support-for-wind-turbines-article79714-10738.html [Accessed on August 01, 2016]
Sarkar A, Gudmestad OT, 2013. Study on a new method for installing a monopile and a fully integrated offshore wind turbine structure. Marine Structures, 33, 160-187.
DOI: 10.1016/j.marstruc.2013.06.001
Scaldis, 2016. T&I of two 5MW wind turbine generators for the Beatrice Demonstrator Project. Available from http://www.scaldis-smc.com/en-GB/projects/35/ [Accessed on Dec. 1, 2016]. Seok MY, 2013. Installation method using vessel for installing sea wind power generator. Available from Espacenet [Accessed on May 23, 2015] Application number: KR20130007124 20130122.
Tahar A, Halkyard J, Steen A, Finn L, 2006. Float-over installation method: Comprehensive comparison between numerical and model test results. Journal of Offshore Mechanics and Arctic Engineering, Technical brief 128.
DOI: 10.1115/1.2199556
Thomsen KE, 2014. Offshore Wind-A comprehensive Guide to Successful Offshore Wind Farm Installation. Academic Press, 2nd Ed., Tranbjerg, Denmark.
Verkade F, 2009. Current offer in offshore cranes and their technical specifications. Available from http://wbmttt.tudelft.nl/rapport/7420e.pdf [Accessed on July 17, 2015]. Wang W, Bai Y, 2010. Investigation on installation of offshore wind turbines. Journal of Marine Science and Application, 9(2), 175-180.
DOI: 10.1007/s11804-010-9076-y.
Wåsjø K, Rico JVB, Bjerkås M, Søreide T, 2013. A novel concept for self-installing offshore wind turbines. Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering, Nantes, France.


Received date: 2016-09-30;Accepted date:2016-12-15。
Corresponding author:Wilson Guachamin Acero,wilson.guachamin@epn.edu.ec
Last Update: 2017-08-31