Searched for: author:"van Dalen, K.N."
(1 - 20 of 38)

Pages

document
Sun, Z. (author), Kasbergen, C. (author), Scarpas, A. (author), Anupam, K. (author), van Dalen, K.N. (author), Erkens, S.M.J.G. (author)
In order to design high-performance roadways, a robust tool which can compute the structural response caused by moving vehicles is necessary. Therefore, this paper proposes a spectral element method-based model to accurately and effectively predict the 3D dynamic response of layered systems under a moving load. A layer spectral element and a...
journal article 2019
document
de Oliveira Barbosa, J.M. (author), van Dalen, K.N. (author)
In this work we propose a model for the analysis of the dynamic behaviour of a ballasted track that combines discrete and continuous elements. The rail is modelled via an Euler-Bernoulli beam, the periodically spaced sleepers are represented with lumped masses, and the ballast is simulated using a lattice (regular network of elastically...
journal article 2019
document
Faragau, A.B. (author), Metrikine, A. (author), van Dalen, K.N. (author)
Transition zones in railway tracks are areas with considerable variation of track properties (i.e., foundation stiffness) encountered near structures such as bridges and tunnels. Due to strong amplification of the response, transition zones require frequent maintenance. To better understand the underlying degradation mechanisms, a one...
journal article 2019
document
Faragau, A.B. (author), Metrikine, A. (author), Mazilu, Traian (author), van Dalen, K.N. (author)
Transition zones are locations of discontinuity in the support,<br/>such as stiffness transition zones in the ballasted track (close<br/>to bridges, culverts and tunnels). These zones necessitate<br/>special attention, mainly because they:<br/>- Require frequent and expensive maintenance activities.<br/>- Cause delays due to unexpected maintenance.
poster 2018
document
Mazilu, Traian (author), Faragau, A.B. (author), Lu, T. (author), van Dalen, K.N. (author)
Transition zones in railway lines are areas between different track structures such as the transition from conventional track (ballasted track) to slab track, to a tunnel or a viaduct. The main feature of a transition zone is that it exhibits a dramatic change in structural behaviour to bridge the difference in the adjacent track parts. This...
abstract 2018
document
Faragau, A.B. (author), van Dalen, K.N. (author)
abstract 2018
document
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
document
Faragau, A.B. (author), van Dalen, K.N. (author)
Transition radiation is emitted when a source moves along a straight line with constant velocity and acts on or near an inhomogeneous medium [1,2]. Transition radiation occurs, for example, when a train crosses an inhomogeneity in the railway track, such as a transition in foundation stiffness. As the velocity of the trains becomes closer to the...
abstract 2018
document
Mazilu, Traian (author), Faragau, A.B. (author), Lu, T. (author), van Dalen, K.N. (author)
abstract 2018
document
Versteijlen, W.G. (author), de Oliveira Barbosa, J.M. (author), van Dalen, K.N. (author), Metrikine, A. (author)
A method is presented to accurately capture the 3D interaction phenomena of a foundation pile embedded in soil, in a computationally efficient non-local 1D model. It is shown how to extract the global stiffness kernels from simulations with the 3D inhomogeneous continuum, and implement them in a 1D non-local Winkler-type model that can...
journal article 2018
document
Versteijlen, W.G. (author), Renting, F.W. (author), van der Valk, P. L.C. (author), Bongers, J.L.C. (author), van Dalen, K.N. (author), Metrikine, A. (author)
In an attempt to decrease the modelling uncertainty associated with the soil-structure interaction of large-diameter monopile foundations, a hydraulic shaker was used to excite a real-sized, in-situ monopile foundation in stiff, sandy soil in a near-shore wind farm. The response in terms of natural frequency and damping of a pile-only system...
journal article 2017
document
Weemstra, C. (author), Wapenaar, C.P.A. (author), van Dalen, K.N. (author)
Session 1pUWc: Underwater Acoustics: Topics in Underwater Acoustics (Poster Session)
abstract 2017
document
Weemstra, C. (author), Wapenaar, C.P.A. (author), van Dalen, K.N. (author)
Seismic interferometry (SI) takes advantage of existing (ambient) wavefield recordings by turning receivers into so-called “virtual-sources.” The medium’s response to these virtual sources can be harnessed to image that medium. Applications of SI include surface-wave imaging of the Earth’s shallow subsurface and medical imaging. Most...
journal article 2017
document
Versteijlen, W.G. (author), Renting, F.W. (author), Valk, van der, P.L.C. (author), Bongers, J. (author), van Dalen, K.N. (author), Metrikine, A. (author)
It is widely accepted that the initial stiffness derived with the p-y methodology as prescribed by the American Petroleum Institute does not capture the true small-strain stiffness for rigidly behaving piles. We present an alternative method, capturing the 3D effects in the soil-pile interaction, in which the soil is characterized with in-situ...
journal article 2017
document
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
document
Versteijlen, W.G. (author), Metrikine, A. (author), van Dalen, K.N. (author)
A procedure is presented for the derivation of an effective small-strain soil stiffness governing the soil– structure interaction of large-diameter monopiles. As a first step, geophysical measurements are used to estimate the depth-dependent shear modulus G of the soil stratum. The second step is to use this modulus and an estimated Poisson’s...
journal article 2016
document
Kudarova, A. (author), van Dalen, K.N. (author), Drijkoningen, G.G. (author)
Mesoscopic-scale heterogeneities in porous media cause attenuation and dispersion at seismic frequencies. Effective models are often used to account for this. We have developed a new effective poroelastic model for finely layered media, and we evaluated its impact focusing on the angledependent attenuation behavior. To enable this, an exact...
journal article 2016
document
Tsouvalas, A. (author), Van Dalen, K.N. (author), Metrikine, A. (author)
Modal decomposition is often applied in elastodynamics and acoustics for the solution of problems related to propagation of mechanical disturbances in waveguides. One of the key elements of this method is the solution of an eigenvalue problem for obtaining the roots of the dispersion equation, which signify the wavenumbers of the waves that may...
journal article 2015
document
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
document
Weemstra, C. (author), Wapenaar, C.P.A. (author), Van Dalen, K.N. (author)
In this work we investigate a modification of the formulation of the theory underlying seismic interferometry (SI) by multidimensional deconvolution (MDD). The current formulation, and hence method, relies on separation of waves traveling inward and outward of a volume bounded by receivers. As a consequence, it is predominantly useful when...
conference paper 2015
Searched for: author:"van Dalen, K.N."
(1 - 20 of 38)

Pages