In this study, the monotonic and cyclic behavior of an offshore wind turbine with a monopile foundation installed in sand layer were evaluated centrifuge. A simplified was modeled, lateral load applied to tower under displacement control. The loading test ultimate capacity bending moment profiles different levels. During loading, variations moment-rotation responses, stiffness, moments along pi...

Offshore wind turbines have been installed in increasing water depths over the last years. Support structures with monopile or gravity based foundation could successfully be used for all realized offshore-projects, but the trend of increasing water depths reached a level that makes application of those relatively simple types of support structures inappropriate. New concepts like tripods or lat...

The contribution of foundation damping to offshore wind turbines (OWTs) is not well known, though researchers have back-calculated foundation damping from “rotor-stop” tests after estimating aerodynamic, hydrodynamic, and structural damping with numerical models. Because design guidelines do not currently recommend methods for determining foundation damping, it is typically neglected. This pape...

An experimental programme is presented, examining the turbulent wake of a monopile foundation in a current. Velocity was recorded across an extensive domain downstream of a model monopile in a 0.5 m deep basin, using an acoustic Doppler velocimeter array. The distribution of turbulent kinetic energy (TKE) is examined across the entire domain. Tests were undertaken using several combinations of ...

Monopile is a common foundation for offshore wind turbines. Long-term cyclic loading from winds and currents may affect the normal operation of For farms, natural soils are usually inherently anisotropic, scouring often occurs as removal soil around monopile. Their influence on pile behavior seldom studied. To investigate effects anisotropy sand laterally loaded pile, series 1 g model tests con...

This paper examines the hydroelastic response of a monopile structure, supporting an offshore wind turbine. A new numerical simulation tool is presented, coupling nonlinear potential flow solver to structural model based on modal superposition. The hydrodynamic Weak-Scatterer (WS) approach and assumes small perturbations incident flow. finite element method (FEM) used compute parameters, which ...

Chen, L.; Zhai, H.; Wang, P.; Zhang, Q.; S.; Duan, L., and Jeng, D.-S., 2022. Experimental study on irregular wave (current)-induced pore-water pressures around a monopile. Journal of Coastal Research, 38(1), 114–132. Coconut Creek (Florida), ISSN 0749-0208. In this study, series flume tests was systematically conducted to the monopile under current loading, as well hydrodynamic response. Unlik...

Monopile response under undrained conditions in sand is gaining increasing interests owing to the recent development of offshore wind farms seismic regions. Pore pressure evolution liquefiable soil can significantly reduce strength and stiffness which turn affects structural dynamic response. Several numerical models have been developed last two decades enhance understanding mechanism monopile–...