Results 171 to 180 of about 2,863 (219)

A novel hybrid monopile foundation for offshore wind turbines

Ocean Engineering, 2020
This paper presents a hybrid monopile foundation for offshore wind turbines. It is an ultra-high performance concrete-filled double skin steel tubular structure (CFDST) used as a replacement of the conventional steel tube between the water level and the ...
Hongwang Ma
exaly   +2 more sources

Physical modeling of combined waves and current propagating around a partially embedded monopile in a porous seabed

Ocean Engineering, 2020
In this paper, a series of experimental data for wave (current)-induced pore-water pressure around a partially embedded monopile is presented. Unlike the previous studies, the combined action of waves and currents is studied.
Linya Chen, Hualing Zhai, Dong-Sheng Jeng   +2 more
exaly   +2 more sources

Scour Protection for Monopile by Concrete Plate

, 2005
A test programme has been performed to determine the scour around a monopile for an offshore wind turbine. The foundation is protected against scour with a concrete plate with various designs. The tests should be regarded as pilot tests previous to a detailed investigation. The tests has been performed at Aalborg University.
Gilling, Lasse, Skúlason, Magnús
openaire   +2 more sources

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Increasing the Lateral Resistance of Offshore Monopile Foundations: Hybrid Monopile-Footing Foundation System

Proceedings of the 2012 (3rd) International Conference on Engineering, Project, and Production Management, 2012
Due to the limitations of locations some of the recently found offshore oil and gas reservoirs, or the proposed locations for some of the offshore wind farms, there is clearly scope for developing foundations that are more efficient. One approach in increasing the lateral load bearing capacity of monopile foundations is the ‘hybrid’ monopile-footing ...
Harry S Arshi, Kevin J L Stone
openaire   +1 more source

Deflection of Monopiles with Collar Caissons

Journal of the Geotechnical Engineering Division, 1981
The discovery of small reserves of gas does not, in general economically justify the investment required for construction of conventional offshore platforms. In this context, the development and economic advantages of monopode platforms for drilling and producing gas wells, in water depths of the order of 100 ft (30 m).
Massimo Magni, Alex P. Michalopoulos
openaire   +1 more source

Guided waves in a monopile of an offshore wind turbine

Ultrasonics, 2011
We study the guided waves in a structure which consists of two overlapping steel plates, with the overlapping section grouted. This geometry is often encountered in support structures of large industrial offshore constructions, such as wind turbine monopiles.
V, Zernov, L, Fradkin, P, Mudge
openaire   +2 more sources

Observed variations of monopile foundation stiffness

2015
The soil-structure stiffness of monopile foundations for offshore wind turbines has a high impact on the fatigue loading during normal operating conditions. Thus, a robust design must consider the evolution of pile-soil stiffness over the lifetime of the wind farm.
D Kallehave, C Thilsted, A Troya
openaire   +3 more sources

The Jackup Monopile: A Production Drilling Platform

Offshore Technology Conference, 1991
ABSTRACT The paper describes the main conceptual and design aspects of a Jack-Up Monopile Platform concept intended for drilling and production in North Sea and which combines technology from Gravity Base Platforms and Jack-Up Rigs.
C. Perol, S. Rodgers, P. Maniere
openaire   +1 more source

Monopiles für die Energiewende Taiwans

UmweltMagazin, 2021
Ein niedersächsischer Windkraftanlagenbauer lieferte 2020 erstmals Fundamentpfähle (Monopiles) für Offshore-Windräder nach Taiwan. Sie sind bis zu 95 m lang und bis zu 1 750 t schwer Der Auftrag verlief erfolgreich. Das Unternehmen erhofft sich jetzt weitere Aufträge aus Asien.
openaire   +1 more source