Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
권호 표지
DOI QR코드

DOI QR Code

Design Sensitivity and Optimum Design of Monopile Support Structure in Offshore Wind Turbine

해상풍력발전기 모노파일 설계민감도해석 및 최적설계

  • Received : 2013.11.11
  • Accepted : 2014.01.09
  • Published : 2014.02.20
Download PDF
⟨ Previous Next ⟩

Abstract

Recently the offshore wind turbine development is requested to be installed off south-west coast and Jeju island in Korea. Reliable and robust support structures are required to meet the demand on the offshore wind turbine in harsh and rapidly varying environmental conditions. Monopile is the most preferred substructure in shallow water with long term experiences from the offshore gas and oil industries. This paper presents an optimum design of a monopile connection with grouted transition piece (TP) for the reliable and cost-effective design purposes. First, design loads are simulated for a 5 MW offshore wind turbine in site conditions off the southwest coast of Korea. Second, sensitivity analysis is performed to investigate the design sensitivity of geometry and material parameters of monopile connection based on the ultimate and fatigue capacities according to DNV standards. Next, optimization is conducted to minimize the total mass and resulted in 30% weight reduction and the optimum geometry and material properties of the monopile substructure of the fixed offshore wind turbine.

Keywords

References

  1. API, 1993. Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms-Working Stress Design. API Recommended Practice 2A-WSD (RP 2A-WSD), Washington: American Petroleum Institute.
  2. De Vries, W. Vemula, N.K. Passon, P. Fischer, T. Kaufer, D. Matha, D. & Vorpahl, F., 2011. Final Report WP4. 2: Support Structure Concepts for Deep Water Sites. Tech. Report, Project UpWind, Netherlands: Delft University of Technology.
  3. Det Norske Veritas (DNV), 2010. Design of Offshore Wind Turbine Structures. Offshore standard DNV-OS-J101, Norway: Det Norske Veritas.
  4. Det Norske Veritas (DNV), 2012. Offshore Concrete Structures. Offshore standard DNV-OS-C502, Norway: Det Norske Veritas.
  5. Han, K.M. kang, S.H. Lee, J.C. Lee, J.H. Kang, D.H. Shin, S.C. & Kim, S.Y., 2011. Optimum design of substructure in floating wind turbine. Proceedings of the Annual Autumn Meeting, SNAK, mokpo, 3-4 November 2011, pp.541-546.
  6. IEC-61400-3, 2009. Wind Turbines-Part 3: Design Requirements for Offshore Wind Turbines. Edition 1.0, Geneva, Switzerland: International Electrotechnical Commission.
  7. Jonkman, J. Butterfield, S. Passon, P. Larsen, T. Camp, T. Nichols, J. Azcona, J. & Martinez, A., 2008. Offshore Code Comparison Collaboration within IEA Wind Annex XXIII: Phase II Results regarding Monopile Foundation Modeling. NREL/CP-500-42471, USA: NREL, Golden, CO.
  8. Jonkman, J. Butterfield, S. Musial, W. & Scott, G., 2009. Definition of a 5-MW Reference Wind Turbine for Offshore System Development. NREL/TP-500-38060, USA: NREL, Golden CO.
  9. Kim, J.Y. Oh, K.Y. Kang, K.S. & Lee, J.S., 2013. Site Selection of Offshore Wind Farms around The Korean Peninsula through Economic Evaluation. Renewable Energy, 54, pp.189-195. https://doi.org/10.1016/j.renene.2012.08.026
  10. Musial, W. Butterfield, S. & Ram, B., 2006. Energy from offshore wind. Offshore Technology Conference, Houston, Texas, May 1-4 2006, pp.1888-1898.
  11. Process Integration, Automation and Optimization(PIAnO), 2012. User's Manual. PIDOTECH Inc: Seoul.
  12. Yang, W.J. & Ko, J.Y., 2004. A Study on the Risk Control Measures of Ship's Collision. Journal of the Society of Naval Architects of Korea, 41(3), pp.41-48.

Cited by

  1. Design Optimization and Reliability Analysis of Jacket Support Structure for 5-MW Offshore Wind Turbine vol.28, pp.3, 2014, https://doi.org/10.5574/KSOE.2014.28.3.218
  2. Eddy Current Sensor Development for Offshore Pipeline NDT Inspection vol.29, pp.2, 2015, https://doi.org/10.5574/KSOE.2015.29.2.199