ABSTRACT

The offshore wind industry increasingly turns to floating platforms in deeper waters due to their consistent wind resources and site suitability. This shift, however, demands cost-effective and robust anchors capable of handling heavy loads. While steel has traditionally been the go-to choice, concerns about its supply chain and environmental impact have arisen. As a result, the industry is exploring alternative materials that align with sustainability criteria and site-specific factors, such as turbine size and lifespan. Potential substitutes include carbon fiber-reinforced polymers (CFRP), high-strength concrete, and other metals. These alternatives offer benefits such as corrosion resistance, reduced CO2 emissions, and enhanced strength-to-weight ratios. This study delves into how the choice of anchor material influences design optimization to meet load capacity requirements. Its findings aim to guide the selection of the most suitable anchor material, taking into account economic considerations and environmental concerns. By optimizing both design and material selection, the offshore wind industry can achieve cost-effective and eco-friendly solutions for its floating platforms, addressing the challenges of today’s energy landscape.

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REFERENCES

ABS (The American Bureau of Shipping). (2020). Guide for building and classing floating offshore wind turbine installations. The American Bureau of Shipping (ABS), Houston (TX), USA.
ACI (American Concrete Institute). (2021). Building Code Requirements for Structural Concrete, ACI 318-19. ASCE Code of Standard Practice (ASCE/SEI 7-16). Farmington Hills, MI: ACI.
Andersen, K. H., Murff, J. D., Randolph, M. F., Clukey, E. C., Erbrich, C. T., Jostad, H. P., Hansen, B., Aubeny, C. P., Sharma, P., and Supachawarote, C. (2005). “Suction anchors for deepwater applications.” Proc., INT Symp. On Frontiers in offshore Geotechniques (ISFOG). Keynote Lecture, Perth, Australia, 3–30.
API (American Petroleum Institute). (2000). “Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms – Working Stress Design”, American Petroleum Institute,.
Aubeny, C. (2017). Geomechanics of Marine Anchors, CRC Press, Taylor & Francis Group, Boca Raton, FL.
Aubeny, C. P., Han, S. W., and Murff, J. D. (2003). “Inclined load capacity of suction caissons.” International Journal for Numerical and Analytical Methods in Geomechanics, 27(14), 1235–1254.
Bakhsh, T., Simpson, K., LaPierre, T., Monim, M., Dahl, J., Spaulding, M., Rowe, J., Miler, J., and O’Connell, D. (2021, February). Potential Geo-Hazards to Floating Offshore Wind Farms in the US Pacific. In International Conference on Offshore Mechanics and Arctic Engineering (Vol. 84768, p. V001T01A014). American Society of Mechanical Engineers.
Balakrishnan, K., Arwade, S. R., DeGroot, D. J., Fontana, C., Landon, M., and Aubeny, C. P. (2020). “Comparison of multiline anchors for offshore wind turbines with spar and with semisubmersible.” In Journal of Physics: Conference Series, Vol. 1452, No. 1, p. 012032. IOP Publishing.
Barter, G. E., Robertson, A., and Musial, W. (2020). “A systems engineering vision for floating offshore wind cost optimization.” Renewable Energy Focus, 34, 1–16.
Beiter, P., Musial, W., Duffy, P., Cooperman, A., Shields, M., Heimiller, D., and Optis, M. (2020). The Cost of Floating Offshore Wind Energy in California Between 2019 and 2032. National Renewable Energy Lab.(NREL), Golden, CO (United States).
Bjornaas, F., Gartland, P. O., and Osvoll, H. (1999). “New Aspects Regarding Cathodic Protection of Floating Production Units” Corrosion.
Bonner, Keim, and Morton. (1990). “A Computerized CP Retrofit Design of the NINIAN Northern Platform.” Corrosion, 12.
Brondel, D., R. Edwards, A. Hayman, D. Hill, S. Mehta, and T. Semerad. (1994). “Corrosion in the oil industry.” Oilfield Review, 6: 4–18.
Byron, F. (2020). “Case Histories Corrosion Basics Corrosion Impact of Offshore Platforms, Structures, and Vessels.” Corrosion-basics, <https://www.materialsperformance.com/articles/corrosion-basics/2020/12/corrosion-impact-of-offshore-platforms-structures-and-vessels>(May. 18, 2023).
Gaertner, E. (2020). “Definition of the IEA wind 15-megawatt offshore reference wind turbine.” National Renewable Energy Laboratory Golden, CO.
IPCC. (2006). Guidelines for National Greenhouse Gas Inventories. 1st Corrigenda for IPCC 2006 Guidelines.
ISO. (2019). Greenhouse gases: specification with guidance at the organization level for quantification and reporting of green house gas emissions and removals, https://www.iso.org (accessed 5.3.22).
Keim, W., Strommen, R., and Jelinek, J. (1988). “Computer modeling in offshore platform CP systems.” Mater. Performance; (United States), 27:9.
Lee, J., and Aubeny, C. P. (2020). “Multiline Ring Anchor system for floating offshore wind turbines.” Journal of Physics: Conference Series, 1452, 012036.
Lee, J., Khan, M., Bello, L., and Aubeny, C. P. (2020). “Cost analysis of multiline ring anchor systems for offshore wind farm.” Proc., Deep Foundation Institute 45th Conference, National Harbor, MD, USA, online, 484–493.
Lee, J., Balakrishnan, K., Aubeny, C. P., Arwade, S., DeGroot, D., Martinez, A., and Beemer, R. (2021). “Uplift resistance of a multiline ring anchor system in soft clay to extreme conditions.” Proc., Geo-Extreme Conference, Savannah, GA, USA.
Lee, J., Hong, J., Aubeny, C. P., Arwade, S., DeGroot, D., Martinez, A., Beemer, R., Balakrishnan, K., and Nam, Y. (2021). “Installability of a multiline ring anchor system in a seabed under severe environmental conditions.” Proc., Global OCEANS 2021, San Diego, CA, USA., DOI:
Lee, J., Aubeny, C. P., Arwade, S., DeGroot, D., Martinez, A., and Beemer, R. (2022). “Effect of wing plates on vertical load capacity of a multiline ring anchor system in clay.” Proc., Geo-Congress, Charlotte, NC, USA.
Lee, J., and Aubeny, C. P. (2023). “Effect of Shared Anchor System for a Floating Offshore Wind Project on Reductions in CO2 Emissions.” In Offshore Technology Conference, Houston, TX, USA.
Lemaignan, B., and Wilmotte, J. (2014). EFFC DFI Carbon Calculator Methodological & User Guide. EEFC-DFI.
MakeItForm.com. (2020). “AISI 304 Stainless Steel vs. SAE-AISI 4340 Steel.” AISI 304 Stainless Steel, <https://www.makeitfrom.com/compare/AISI-304-S30400-Stainless-Steel/SAE-AISI-4340-SNCM439-G43400-Ni-Cr-Mo-Steel>(May. 18, 2023).
Malhotra, S. (2010). Design and construction considerations for offshore wind turbine foundations in North America. In GeoFlorida 2010: Advances in Analysis, Modeling & Design, pp. 1533–1542.
Mandr, J. O. (2021). “Marine Benchmark: 2020 global shipping CO2 emissions down 1%.” GREEN MARINE, < Marine Benchmark: 2020 global shipping CO2 emissions down 1% - Offshore Energy (offshore-energy.biz)>(May. 18, 2023).
Mathiesen, T., Osvoll, H., and Mohseni, P. (2016). Preventing Galvanic Corrosion in Drilling Risers and Subsea Equipment. https://www.researchgate.net/publication/308904295.
McCulloch, D. S., Clarke, S. H., Dolton, G. L., Field, M. E., Scott, E. W., and Utter, P. A. (1982). Geology, environmental hazards, and petroleum resources for 1982 OCS lease sale 73, offshore central and northern California. US Department of the Interior, Geological Survey.
Merifield, R. S. (2011). Ultimate uplift capacity of multiplate helical type anchors in clay. Journal of geotechnical and geoenvironmental engineering, 137(7), 704–716.
Murff, J., Randolph, M., Elkhatib, S., Kolk, H., Ruinen, R., Strom, P., and Thorne, C. (2005). “Vertically loaded plate anchors for deepwater applications.” Proc., Proc Int Symp on Frontiers in Offshore Geotechnics, 31–48.
Musial, W., Heimiller, D., Beiter, P., Scott, G., and Draxl, C. (2016). 2016 Offshore Wind Energy Resource Assessment for the United States. National Renewable Energy Lab, Golden, CO, USA.
NAVFAC. (2005). NAVFAC DM7-02 Foundations and Earth Structures, Naval Facilities Engineering Command, Department of the Navy.
O’Loughlin, C., White, D., and Stanier, S. (2015). “Novel Anchoring Solutions for FLNG-Opportunities Driven by Scale.” Proc., Offshore Technology Conference, Offshore Technology Conference.
Osvoll, H., and Wigen, S. M. (2006). Methods for Cathodic Protection of FPSO’s. Where do we go?
Porter, A., and Phillips, S. (2016). Determining the Infrastructure Needs to Support Offshore Floating Wind and Marine Hydrokinetic Facilities on the Pacific West Coast and Hawaii.
Quiros, G., Young, A., Pelletier, J., and Chan, J. (1983). Shear strength interpretation for Gulf of Mexico clays. Geotechnical practice in offshore engineering, Austin, Teaxas:ASCE, pp 144–65.
Randolph, M. F., and Murphy, B. S. (1985). “Shaft capacity of driven piles in clay.” In Offshore technology conference. OnePetro.
Sen, R., Sukumar, S., and Rosas, J. (1995). Durability of CFRP Pretensioned Piles in a Marine Environment. Volume II.
Shields, M., Stefek, J., Oteri, F., Kreider, M., Gill, E., Maniak, S., Gould, R., Malvik, C., Tirone, S., and Hines, E. (2023). A Supply Chain Road Map for Offshore Wind Energy in the United States. National Renewable Energy Lab.(NREL), Golden, CO, USA.
Viselli, A. M., Goupee, A. J., and Dagher, H. J. (2015). “Model test of a 1: 8-scale floating wind turbine offshore in the gulf of Maine.” Journal of Offshore Mechanics and Arctic Engineering, 137(4).
Wigen, S. M., and Osvoll, H. (2006). “Corrosion Problems in Seawater Pump Caissons: Practical Solutions.” In CORROSION 2006, San Diego, CA, USA.

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Geo-Congress 2024
Pages: 360 - 369

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Published online: Feb 22, 2024

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Junho Lee, Ph.D., A.M.ASCE [email protected]
1Postdoctoral Research Associate, Zachry Dept. of Civil and Environmental Engineering, Texas A&M Univ., College Station, TX. Email: [email protected]
Jungrak Son, Ph.D., P.E. [email protected]
2Senior Geotechnical Engineer, Offshore Engineering Dept., American Bureau of Shipping, Spring, TX. Email: [email protected]
Ahmed Radwan, S.M.ASCE [email protected]
3Ph.D. Student, Zachry Dept. of Civil and Environmental Engineering, Texas A&M Univ., College Station, TX. Email: [email protected]
Charles P. Aubeny, Ph.D., P.E., F.ASCE [email protected]
4Professor, Zachry Dept. of Civil and Environmental Engineering, Texas A&M Univ., College Station, TX. Email: [email protected]

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