Results 21 to 30 of about 7,344 (270)
Determination of stress concentration factors in offshore wind welded structures through a hybrid experimental and numerical approach [PDF]
, 2019 Offshore wind turbine (OWT) monopile support structures generally consist of steel cans connected together through circumferential welding joints. One critical factor to evaluate the localised increase in stresses is the stress concentration factor (SCF)
Brennan, Feargal +3 more
core +2 more sources
The turbulent wake of a monopile foundation [PDF]
Renewable Energy, 2016 Abstract 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.
C. Rogan +3 more
openaire +1 more source
Fatigue crack growth rates for offshore wind monopile weldments in air and seawater: SLIC inter-laboratory test results [PDF]
, 2016 The majority of fatigue crack growth (FCG) data sets available on steels in air and seawater environments are several decades old and may not be appropriate for structural integrity assessment of offshore wind turbine foundations, which are fabricated ...
Brennan, Feargal P. +2 more
core +2 more sources
Active vibration control of a monopile offshore structure [PDF]
Journal of Structural Control, 1999 AbstractIn the Danish part of the North Sea monopile platforms with a cylindrical shaft have been used at the exploitation of marginal fields. In the paper a new principle for active vibration control of such structures is suggested. The principle is based on a control of the boundary layer flow around the cylinder of the platform, so the drag force in
Nielsen, Søren R. K. +2 more
openaire +2 more sources
PISA design model for monopiles for offshore wind turbines: application to a stiff glacial clay till
Geotechnique, 2020 Offshore wind turbines in shallow coastal waters are typically supported on monopile foundations.
B. Byrne +10 more
semanticscholar +1 more source
Monopiles subjected to uni- and multi-lateral cyclic loading [PDF]
, 2017 Offshore wind turbines are subjected to significant environmental loads from a combination of current, wind and wave action. Under such conditions, the directions of these environmental loads vary over the service life of the structure and therefore the ...
Arthur, Iain +9 more
core +1 more source
Scour Reduction by Collars around Offshore Monopiles [PDF]
Scour and Erosion, 2010 Excessive scour is a threat to the stability of monopile foundations, e.g. in offshore windparks. Particularly in shallow waters with strong tidal currents such as the North Sea, protection against excessive scouring is required. Commonly applied scour protection consists of loose rock. Little is known about alternative scour protection measures.
De Sonneville, B. +2 more
openaire +2 more sources
Model Uncertainties for Soil-Structure Interaction in Offshore Wind Turbine Monopile Foundations
Journal of Marine Science and Engineering, 2018 Monopiles are the most common type of foundation used for bottom-fixed offshore wind turbines. This investigation concerns the influence of uncertainty related to soil–structure interaction models used to represent monopile–soil systems.
Lars Vabbersgaard Andersen +2 more
doaj +1 more source
Numerical Study on Lateral Response of Offshore Monopile in Sand under Local Scouring Conditions
Journal of Marine Science and Engineering, 2023 Currently, p-y models have been broadly adopted for estimating the lateral bearing capacity of large-diameter monopiles in offshore engineering. However, the existing p-y curves cannot reflect the effect of pile diameter D on the lateral response of ...
Jiayi Shen +5 more
doaj +1 more source
Tsunami-induced scour around monopile foundations [PDF]
Coastal Engineering, 2017 Abstract A fully-coupled (hydrodynamic and morphologic) numerical model is presented, and utilized for the simulation of tsunami-induced scour around a monopile structure, representative of those commonly utilized as offshore wind turbine foundations at moderate depths i.e. for depths less than 30 m.
Bjarke Eltard Larsen +3 more
openaire +3 more sources