Searched for: subject:"offshore"
(1 - 20 of 1,674)

Pages

document
Gorenstein Dedecca, J. (author), Hakvoort, R.A. (author), Herder, P.M. (author)
The deployment of offshore wind and power transmission in the European North Sea is accelerating. Stakeholders advocate regional governance for the European grid expansion, which may evolve into a pan-European governance and is key to developing integrated, hybrid offshore projects. However, such projects are still scarce. We thus analyze the...
journal article 2019
document
Bruijn, Willem E.L. (author), Rip, Jolien (author), Hendriks, Antoon J.H. (author), van Gelder, P.H.A.J.M. (author), Jonkman, Sebastiaan N. (author)
A marine project consists of series of operations, with each operation subject to a predefined operational limit and duration. If actual weather conditions exceed the operational limit, the operation cannot be executed and hence downtime occurs. An accurate assessment of uncertainties and the expected downtime during a marine project is...
journal article 2019
document
Sanchez Perez Moreno, S. (author)
A system is a set of interconnected components whose individual behaviour and interactions determine the overall performance of the set. Wind farms are amongst the most complex systems deployed worldwide, based on their uncertainty, heterogeneity and complexity. Moreover, many technical and social disciplines may simultaneously describe the...
doctoral thesis 2019
document
Kementzetzidis, E. (author), Pisano, F. (author)
Japan is one of the most seismically active countries in the world, and is currently planning to invest on offshore wind energy. In support of this relevant energy transition, this work presents a numerical study regarding a monopile-supported offshore wind turbine (OWT) under seismic loading conditions. For this purpose, a realistic design of...
conference paper 2019
document
Keijdener, C. (author), Hendrikse, H. (author), Metrikine, A. (author)
In this paper, the efficacy of an effective fluid model (EFM) is studied for replicating the effects that hydrodynamics has on the interaction between level ice, modeled as a semi-infinite Kirchhoff-Love plate, and a downward sloping structure, modeled as a rigid and immobile body. The proposed EFM is based on a distributed frequency-independent...
conference paper 2019
document
Willems, Tom (author), Hendrikse, H. (author)
Offshore wind turbines at locations where sea or lake ice is present need to be designed to withstand ice-induced loading. For vertical-sided support structures, such as monopiles, the effects of ice-induced vibrations need to be considered in the design. Current practice is either to use approaches provided in design standards, or for example...
conference paper 2019
document
Leontaris, G. (author), Morales Napoles, O. (author), Dewan, Ashish (author), Wolfert, A.R.M. (author)
Offshore asset construction is a complex and costly process that is subject to various uncertainties within the entire supply chain. Hence, both the construction management optimization and the reduction of deployment expenditures should be supported by automated decision support models which include proper representations of predominant...
journal article 2019
document
de Nie, Ruben (author), Leontaris, G. (author), Hoogendoorn, Don (author), Wolfert, A.R.M. (author)
Installation and maintenance operations of offshore assets are impacted by local environmental conditions such as wave height and period, wind speed and current velocity. These parameters are substantially of influence for the asset planning (time and costs) given the uncertainty of operational windows. In this article, a method is proposed to...
journal article 2019
document
Hendrikse, H. (author), Koot, Jasper (author)
Ice-induced vibrations have to be considered in the design of vertically sided offshore structures which may encounter drifting sea or lake ice during their lifetime. One particular aspect is the contribution of ice-induced vibrations to the fatigue of such structures. Estimation of the duration of events is often difficult, due to limited...
conference paper 2019
document
Zhang, W. (author), Askarinejad, A. (author)
Sand erosion and scouring caused by waves and marine currents result in gradual increase of local seabed inclination and formation of slopes around hydraulic structures and offshore foundations. During this process, shear stresses in the soil body increase monotonically which may lead to static liquefaction and damage of the adjacent offshore...
journal article 2019
document
Liu, H. (author), Abell, J. A. (author), Diambra, A. (author), Pisano, F. (author)
The modelling and simulation of cyclic sand ratcheting is tackled by means of a plasticity model formulated within the well-known critical state, bounding surface SANISAND framework. For this purpose, a third locus – termed the ‘memory surface’ – is cast into the constitutive formulation, so as to phenomenologically capture micro-mechanical,...
journal article 2019
document
Kementzetzidis, E. (author), Corciulo, Simone (author), Versteijlen, Willem G. (author), Pisano, F. (author)
The development of the offshore wind industry is motivating substantial research efforts worldwide, where offshore wind turbines (OWTs) of increasing size are being installed in deeper water depths. Foundation design is a major factor affecting the structural performance of OWTs, with most installations founded to date on large-diameter...
journal article 2019
document
Tsouvalas, A. (author), Peng, Y. (author), Metrikine, A. (author)
In this paper, a pile-water-soil model is developed for the prediction of sound generated due to impact piling. The complete model consists of two modules: i) a near-source module aiming at the accurate description of the pile-water-soil interaction together with the sound generation and propagation in the vicinity of the pile; and ii) a far...
conference paper 2019
document
Byrne, B. W. (author), Burd, H. J. (author), Gavin, Kenneth (author), Houlsby, G. T. (author), Jardine, R. J. (author), McAdam, Ross A. (author), Martin, Chris M. (author), Potts, D. M. (author), Taborda, D. M G (author), Zdravković, L. (author)
This paper provides a brief overview of the Pile Soil Analysis (PISA) project, recently completed in the UK. The research was aimed at developing new design methods for laterally loaded monopile foundations, such as those supporting offshore wind turbine structures. The paper first describes the background to the project and briefly outlines the...
conference paper 2019
document
Bridges, Robert (author), Riska, K.A. (author), Hopkins, Mark (author), Wei, Ying (author)
Ice encroachment is the accumulation of ice atop a platform and results when ice drifts against a platform. Most often this occurs in shallow water but in principle can occur in deep water if the ice drift length is long enough. As the ice drifts against the platform it is broken and generates rubble and ice piles in front of the platform, and...
journal article 2019
document
Besseling, Floris (author), Lengkeek, H.J. (author), de Waard, Huig (author), Nieuwenhuis, Kees (author)
The Afsluitdijk is one of the Dutch Delta programme landmarks. Afsluitdijk is a 32 km long primary flood defense, separating lake IJsselmeer from the Wadden Sea and protecting large areas of the Netherlands against flooding. Over the period spanning 2018 - 2022 the levee will be upgraded by the consortium Levvel (BAM, Van Oord and Rebel). Ice...
conference paper 2019
document
Gorenstein Dedecca, J. (author)
The expansion of offshore power transmission and generation in the North Seas of Europe is accelerating rapidly. This is due to several drivers, including the decarbonization and reform of the European power system, and innovations in offshore wind and high-voltage direct current transmission. So far, this European North Seas offshore grid is...
doctoral thesis 2018
document
van der Horst, M.P. (author)
Ship and offshore structures are prone to fatigue damage as they are cyclically<br/>loaded by waves. Therefore, regular inspection is needed in order to confirm adequate structural integrity throughout the entire service life of the structure. Detected fatigue cracks that are too long for safe operation need to be repaired. Detected cracks of...
doctoral thesis 2018
document
Byrne, T. (author), Gavin, K. (author), Prendergast, L.J. (author), Cachim, P. (author), Doherty, Paul (author), Chenicheri Pulukul, S. (author)
Offshore pile driving is a high-risk activity as delays can be financially punitive. Experience of pile driving for offshore jacket structures where pile diameters are typically &lt; 2 m has led to the development of empirical pile driveability models with proven predictive capability. The application of these methods to larger diameter piles...
journal article 2018
document
Murphy, Gerry (author), Igoe, David (author), Doherty, Paul (author), Gavin, K. (author)
Over the past 5 years, a substantial research effort aimed at optimising the design of offshore wind turbines has led to significant reductions in the projected cost of developing offshore wind. Optimising the geotechnical design of these structures, through modern analysis techniques such as 3D Finite Element Modelling (FEM), has played a...
journal article 2018
Searched for: subject:"offshore"
(1 - 20 of 1,674)

Pages