Marine Growth Effect on the Vibration Characteristics of Offshore Wind Turbine with Jacket Foundation

Abstract:

Due to the energy crisis and greenhouse effect, wind energy is becoming one of the most attractive renewable energies during last three decades. Especially them offshore wind energy gets more attention because it could provide better wind condition with less turbulence and no visual impact and land limitation. Different foundation types could be used for offshore wind turbine. Jacket foundation is regarded as a suitable solution for the intermediate water depth ranging from 30 to 80 meters. On the submerged members of jacket, numerous type of marine fouling organism may be found. They may increase the diameter of the members, change the surface roughness and influence the hydrodynamic loads of structures. In this paper, the types and distribution of marine growth are presented. Effects of marine growth thickness, density and hydrodynamic coefficients on vibration characteristics of offshore wind turbine are discussed. The natural frequencies of the coupled system are compared.

• Periodical: Applied Mechanics and Materials (Volumes 84-85)
• Pages: 691-696
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.84-85.691
• Online since: August 2011
• Authors: Wei Shi, Hyun Chul Park, Chin Wha Chung, Young Chan Kim
• Keywords: Hydrodynamic Loads, Jacket Foundation, Marine Growth, Natural Frequency, Offshore Wind Energy

References

[1] BTM Consult APS, International Wind Energy Development Offshore Report 2010, (2010).

[2] Iberahin J. Msut, Julian W. Frina, Effects of marine growth and hydrodynamic loading on offshore structures, Jurnal Mekanikal, 1 (1). (1996) pp.77-96.

[3] Mel Bayliss, David Short, Mary Bax Underwater Inspection, Spon Press (1988).

[4] Jonkman, J., Butterfield, S., Musial, W., and Scott, G., Definition of a 5-MW Reference Wind Turbine for Offshore System Development, National Renewable Energy Laboratory (2009).

DOI: 10.2172/947422

[5] Musial, W, Jonkman, J, Quesnel, L, and Vorpahl, F. IEA Wind Annex 30 Task Proposal: Offshore Comparison of Dynamic Computer Codes and Models Offshore Code Comparison Collaborative (OC3) Extension Project, (2009).

DOI: 10.2172/1004009

[6] Vorpahl, F. and Kaufer, D. Description of a basic model of the "Upwind reference jacket" for code comparison in the OC4 project under IEA Wind Annex XXX,. Technical report, Fraunhofer Institute for Wind Energy and Energy System Technology (IWES) (2010).

[7] DNV, DNV-OS-J101: Design of offshore wind turbine structures, Det Norske Veritas (2010).

DOI: 10.3940/rina.mre.2010.01

[8] API RP 2A, Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms, 21st Edition, API, USA (2007).

DOI: 10.4043/23558-ms