... and the current, the instability of offshore wind turbine foundation is one of the vital issues of the fluid-seabed-structure interactions, which would threaten the safety of the submarine slope and monopile foundation, and even lead to the severe structural failure. To capture the dynamic soil behavior around...

... ABSTRACT As wind turbines increase in size, the foundation loads increase as does the size of the monopile foundations. Consequently, the installation of monopile foundations becomes a critical aspect of design where the accurate prediction of pile driveability performance is used to inform...

... ABSTRACT In this study, a series of sea-wave loading tests were conducted on model monopiles settled on a rubble mound with a scour countermeasure around the monopile foundations. The results revealed that local scouring around the structure could be suppressed by installing rubble mound...

... by using computational fluid dynamics (CFD) method. The flow and diffusion characteristic, and the residual rate of solidified slurry around the monopile foundation and pile group foundation are systematically investigated. It is found that the location downstream of the foundation is optimal for pumping...

... wind turbine using a previously proposed catamaran installation vessel. The simulated installation process involves the catamaran installation vessel, a lifted 5-MW wind turbine assembly and a pre-installed monopile foundation. Time-domain numerical simulations are conducted for the coupled catamaran...

... and current on the OWTs, the three-dimensional non-linear finite element analysis coupled with the BP neutral network model are applied on prediction of the static bearing performances of OWT monopile foundations. Meanwhile, the normal operating condition and the braked condition of OWT structures...

... ABSTRACT The foundation stiffness under operational loads is a crucial aspect for the design of monopile foundations, as key design issues, structural natural eigenfrequencies as well as the structural fatigue damage are significantly affected. According to measurement results, the current...

... ABSTRACT In this paper, we compare the load displacement behavior of an offshore monopile foundation obtained with different beam-spring approaches (p-y-curves) with numerical results obtained with the Finite Element method. Good agreement between the Finite Element calculation and the beam...

... ABSTRACT Due to the lateral stiffness shortage of the monopile, and in order to improve the applicability of the monopile, a new wind turbine foundation type which is combining the jacket and monopile foundations is proposed. Based on the engineering example of offshore wind farm in Fujian...

... under vertical cyclic loading and two different approaches (sub-layering model and stiffness degradation model) for monopile foundations subjected to a horizontal cyclic loading are presented. The results of these models are compared to the solution from complete 2D or 3D finite element simulations...

... Abstract Monopiles are the most widely utilized foundation for offshore wind turbines (OWTs) in shallow waters. However, jacket-type foundations are being considered as one of the good alternatives to monopile foundations for relatively deep water in the range of 25–50 m of water depth. Jacket...

... transfer function offshore wind turbine subsea system ring-flange connection ec 3 monopile foundation renewable energy high-strength bolt Fatigue Assessment of High-Strength Bolts with Very Large Diameters in Substructures for Offshore Wind Turbines Peter Schaumann, Rasmus Eichstädt ForWind...

... was presented and examined to aid in better understanding the multi-hazard behavior (i.e., wind and waves) of a representative offshore wind turbine with monopile foundations. Preliminary results from the computational simulation will be discussed. offshore wind turbine severe environmental condition...

... monopile foundation natural frequency design criteria sensitivity analysis Weight Optimisation of Steel Monopile Foundations for Offshore Windfarms Nils Fog Gjersøe LICengineering A/S Esbjerg, Denmark Erik Bouvin Pedersen LICengineering A/S Esbjerg, Denmark Brian Kristiansen LICengineering A/S...

... and the Baltic Sea in Europe a vast number of offshore wind farms are being planned and several have already been installed in recent years. In the beginning, in most cases wind farms were erected in moderate water depths (less than 20m) and monopile foundations have been built as support structures for the wind...

... in order to avoid an increase in the cost per MW power when the turbines are installed at greater water depths. For offshore wind turbines, monopile foundations with diameters of 4–6 m are often employed. In order to stay competitive, the overall weight of the monopile foundation and turbine is kept...

... %. The dependency of the relative density of backfill on the maximum pile bending moment is assessed through three-dimensional numerical modeling of a monopile foundation located at the offshore wind farm at Horns Reef, Denmark. INTRODUCTION When designing offshore wind turbine foundations, several foundation...

... ABSTRACT A series of experiments were conducted in a large flow-structure-soil interaction flume to analyze the scour development and pore-water pressure response around a monopile foundation under the action of combined waves and currents. In the experiments, the scour depth and pore pressure...

... are assessed. The minimum required embedded lengths of monopile foundations with respect to scour are evaluated and the suitability of adopting the mentioned design criteria for monopile foundations is discussed. INTRODUCTION Monopile foundations, the single pile with a diameter 3 to 5m, are the most common...

... Static and Dynamic Analysis of Monopile Foundation for Offshore Wind Farm Jianhua Zhang1, Ke Sun 2, Zhen-qing Wang 1, Liang Zhang 2, Jun Hao3 1 College of Aerospace and Civil Engineering, Harbin Engineering University Harbin, Heilongjiang Province, China 2 Deepwater Engineering Research Center...