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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
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van Vliet, R. (author), Metrikine, A. (author)Structures with a downward sloping waterline shape in Arctic or sub-Arctic regions experience reduced loading from ice on the structure and its foundation compared to vertical structures as the slope causes the ice to fail in bending. For the design of these structures, a numerical model is desired that can predict the loading from the ice on...conference paper 2018
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Zhao, M. (author), van Dalen, K.N. (author), de Oliveira Barbosa, J.M. (author), Metrikine, A. (author)This paper addresses the dynamic response of an infinitely long cylindrical structure embedded in an elastic half-space. The structure has a circular cross-section and its axis is parallel to the half-space surface. Excitation can be incident body waves or forces applied on the surface of the half-space and/or the structure. The model can be...conference paper 2018
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- Lu, T. (author), Tsouvalas, A. (author), Metrikine, A. (author) conference paper 2017
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Hoving, J.S. (author), Metrikine, A. (author)This contribution considers the wave reflection at the interface between a discrete lattice that describes the nonlinear near-field response to a dynamic load and a matching system that describes the linear far-field response. The near-field system is modelled as a one-dimensional discrete system of particles that is capable of describing...conference paper 2017
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Hendrikse, H. (author), Seidel, Marc (author), Metrikine, A. (author), Loset, Sveinung (author)Ice-induced vibrations have to be considered in design of vertically sided offshore structures subjected to loading by sea ice, such as offshore wind turbines and oil- and gas platforms. The interaction between ice and structure may result in high global peak loads and the occurring structural vibrations can contribute significantly to the...conference paper 2017
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Meijers, P.C. (author), Tsouvalas, A. (author), Metrikine, A. (author)Due to the increasing need for energy from renewable resources, a large number of offshore wind farms are planned to be constructed in the near future. Despite the plethora of available foundation concepts for offshore wind turbines, the monopile foundation is the most widely adopted concept in practice. To predict the installation process for a...conference paper 2017
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Assaad, W. (author), Pasaribu, H.R. (author), Zijsling, DJ (author), van Dalen, K.N. (author), Metrikine, A. (author)Shell has developed a novel mono-diameter well concept for oil and gas wells as opposed to the traditional telescopic well design. A Mono- diameter well contains multiple casing sections with the same internal diameter. This is achieved by expansion of the casing sections concerned using an expansion cone. Since the well is drilled in stages and...conference paper 2017
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Sánchez Gómez, S. (author), Metrikine, A. (author)The aim of this paper is to identify the local energy dissipation in a lab-scale structure by means of the energy flow analysis. In most of the existing approaches the damping is identified either in terms of the modal damping factors or at the material scale. In this paper, an alternative method to these global and material-based approaches...conference paper 2017
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Tsouvalas, A. (author), Metrikine, A. (author)This paper describes a semi-analytical model that is used for the investigation of the sound reduction during marine piling when an air-bubble curtain is placed around the pile. The model consists of the pile, the surrounding water and soil media, and the air-bubble curtain which is positioned at a certain distance from the pile surface. The...conference paper 2016
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- Lu, T. (author), Metrikine, A. (author) conference paper 2015
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Keijdener, C. (author), Metrikine, A. (author)In the original problem for which this model was developed, onedimensional flexible objects interact through a non-linear contact model. Due to the non-linear nature of the contact model, a numerical time-domain approach was adopted. One of the goals was to see if the coupling between axial and transverse deformations had an influence on the...conference paper 2015
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Versteijlen, W.G. (author), De Oliveira Barbosa, J.M. (author), Van Dalen, K.N. (author), Metrikine, A. (author)The motivation for this work stems from the offshore wind industry, where designers are faced with a discrepancy between the available design methods and the typical dimensions of the offshore wind foundations that call for other design approaches. Throughout the years, much valuable work has been performed in the prediction of long, slender,...conference paper 2015
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Hoving, J.S. (author), Metrikine, A. (author)To minimize the calculation time required by numerical models that de- scribe dynamic interactions involving nonlinear behaviour, it is useful to divide the model into two separate domains. One domain close to the interaction point, which consists of a sophisticated model capable of describing nonlinear phenomena, and another domain at a...conference paper 2015
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Keijdener, C. (author), Metrikine, A. (author)When studying the dynamics of ice-structure interaction, hydrodynamic effects are often ignored to simplify the model. One of the challenges associated with the introduction of the hydrodynamic forces is that those introduce frequency dependent added mass and damping into the system. In order to include these two components in a time domain...conference paper 2015
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Van der Male, P. (author), Van Dalen, K.N. (author), Metrikine, A. (author)In determining wind forces on wind turbine blades, and subsequently on the tower and the foundation, the blade response velocity cannot be neglected. This velocity alters the wind force, which depends on the wind velocity relative to that of the blades This blade response velocity component of the wind force is commonly referred to as added...conference paper 2014
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Tsouvalas, A. (author), Metrikine, A. (author)A steel monopile is the most common foundation type of a wind turbine installed offshore and is driven into place with the help of vibratory or impact hammers. Underwater noise generated during the installation of steel monopiles has recently received considerable attention from international environmental organizations and regulatory bodies in...conference paper 2014
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Lu, T. (author), Metrikine, A. (author)A load moving on a center-fixed ring and the reciprocal problem, namely a rotating ring subjected to a moving load have been used in several works to study the tire dynamics. In contrast, very few papers exist in which the ring model has been used in order to study the dynamics of a train wheel. In this paper, a thin ring model is introduced to...conference paper 2014
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Van Dalen, K.N. (author), Metrikine, A. (author), Tsouvalas, A. (author)Transition radiation is emitted when a perturbation source (e.g., electric charge, mechanical load), which does not possess an inherent frequency, moves along a straight line at a constant velocity in or near an inhomogeneous medium. The phenomenon was described for the first time in electromagnetics, but it is universal from the physical point...conference paper 2014
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Versteijlen, W.G. (author), Van Dalen, K.N. (author), Metrikine, A. (author), Hamre, L. (author)In this contribution, in situ seismic measurements are used to derive the small-strain shear modulus of soil as input for two soil-structure interaction (SSI) models to assess the initial soil stiffness for offshore wind turbine foundations. This stiffness has a defining influence on the first natural frequency of offshore wind turbines (OWTs),...conference paper 2014