Effects of Spilling and Plunging Type Breaking Waves Acting on Large Monopile Offshore Wind Turbines

Frontiers in Marine Science

卷:7

Jikun You²  Constantine Michailides³  Ye Tang⁴  Dezhi Ning⁴  Wei Shi⁵ 

[1] China Water Northeastern Investigation, Design and Research Co., Ltd., Changchun, China;

[2] Connect LNG AS, Oslo, Norway;

[3] Department of Civil Engineering and Geomatics, Cyprus University of Technology, Limassol, Cyprus;

[4] State Key Laboratory of Coastal and Offshore Engineering/Deepwater Engineering Research Center, Dalian University of Technology, Dalian, China;

[5] State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, China;

关键词: offshore wind turbines;    large diameter monopile;    fifth-order stokes waves;    hydrodynamic analysis;    breaking waves;    wave loads;   

DOI  :  10.3389/fmars.2020.00427

来源: DOAJ

【 摘 要 】

In the present paper, the computational fluid dynamics method is used to investigate the effects of breaking wave loads on a 10-MW large-scale monopile offshore wind turbine under typical sea conditions in the eastern seas of China. Based on Fifth-Order Stokes wave theory a user-defined function is developed and used for wave numerical modeling, and a numerical wave tank with different bottom slopes is developed. The effects of different types of breaking waves, such as spilling and plunging waves, on the wave run-up, pressure distribution and horizontal wave force of a large diameter monopile are investigated. Different numerical and analytical methods for calculating the wave breaking loads are used and their results are compared with the relevant results of the developed computational fluid dynamics model and their respective scopes of application are discussed. With an increase in wave height, the change in the hydrodynamic performance of breaking waves observed through the transition from plunging to spilling waves is explored. The intensity of interactions occurring between the breaking waves and the monopile foundation depends mainly on the form of wave breaking involved and its relationship to wave steepness is weak. Analytical methods for calculating the breaking wave loads are preservative especially for plunging breaking wave loads.

【 授权许可】

Unknown