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- Versteijlen, W.G. (author), Metrikine, A. (author), Hoving, J.S. (author), Smidt, E.H. (author), De Vries, W.E. (author) conference paper 2011
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- Maatanen, M. (author), Loset, S. (author), Metrikine, A. (author), Evers, K.U. (author), Hendrikse, H. (author), Lonoy, C. (author), Metrikin, I. (author), Nord, T. (author), Sukhorukov, S. (author) conference paper 2012
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- Hendrikse, H. (author), Metrikine, A. (author), Evers, K.U. (author) conference paper 2012
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- Tsouvalas, A. (author), Metrikine, A. (author), Jung, B. (author) conference paper 2012
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Hendrikse, H. (author), Metrikine, A.V. (author)Vertically-sided offshore structures occasionally experience sustained vibration due to drifting ice sheets crushing against them. These vibrations may lead to problems associated with structural integrity and safety. Traditionally, three regimes of interaction are distinguished: intermittent crushing, frequency lock-in and continuous brittle...conference paper 2013
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- Tsouvalas, A. (author), Metrikine, A. (author) conference paper 2013
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Van der Male, P. (author), Van Dalen, K.N. (author), Metrikine, A. (author)This paper presents the first step of the derivation of an aerodynamic damping matrix that can be adopted for the foundation design of a wind turbine. A single turbine blade is modelled as a discrete mass-spring system, representing the flap and edge wise motions. Nonlinear wind forcing is applied, which couples the degrees of freedom. The...conference paper 2013
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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
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Nord, T.S. (author), Lourens, E. (author), Oiseth, O. (author), Metrikine, A. (author)The level-ice forces exerted on a scale model of a compliant bottom founded structure are identified from noncollocated strain and acceleration measurements by means of a joint input-state estimation algorithm. The identification is performed based on two different finite element models: one entirely based on the blueprints of the structure, and...conference paper 2014
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Tsouvalas, A. (author), Hendrikse, H. (author), Metrikine, A. (author)Modal decomposition is often used in geophysics and acoustics for the solution of problems related to wave propagation in elastic or acousto-elastic waveguides. One of the key elements of this method is the solution of an eigenvalue problem for obtaining the roots of the characteristic equation, which may signify either frequencies or...conference paper 2014
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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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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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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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- 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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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