Searched for: author:"Van Dalen, K.N."
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Zhao, M. (author), de Oliveira Barbosa, J.M. (author), Yuan, Jun (author), Metrikine, A. (author), van Dalen, K.N. (author)
This paper investigates the instability of vertical vibrations of an object moving uniformly through a tunnel embedded in soft soil. Using the indirect Boundary Element Method in the frequency domain, the equivalent dynamic stiffness of the tunnel-soil system at the point of contact with the moving object, modelled as a mass-spring system or...
journal article 2021
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de Oliveira Barbosa, J.M. (author), Faragau, A.B. (author), van Dalen, K.N. (author)
The procedure presented in this work aims at providing a framework for studying settlement of ballast in zones with stiffness variation of the railway track support. The proposed procedure results from expanding an existing infinite periodic model of a railway track to account for variations in the stiffness of the foundation. Ballast is...
journal article 2021
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Faragau, A.B. (author), Keijdener, C. (author), de Oliveira Barbosa, J.M. (author), Metrikine, A. (author), van Dalen, K.N. (author)
Transition zones in railway tracks are locations with a significant variation of track properties (i.e. foundation stiffness) encountered near structures such as bridges and tunnels. Due to strong amplification of the track’s response, transition zones are prone to rapid degradation. To investigate the degradation mechanisms in transition...
journal article 2021
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Sun, Z. (author), Kasbergen, C. (author), van Dalen, K.N. (author), Anupam, K. (author), Scarpas, Athanasios (author), Erkens, S. (author)
Pavements generally demand necessary maintenance and rehabilitation to maintain their service performance in the whole lifespan. The maintenance and rehabilitation strategies are usually formulated based on the results of non-destructive testing, in which the traffic speed deflectometer (TSD) test is an efficient tool for pavement structural...
conference paper 2020
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van der Male, P. (author), van Schaik, R. (author), Vergassola, M. (author), van Dalen, K.N. (author)
The downwind configuration of wind turbines offers benefits regarding the blade-tower clearance, as during operation the blade primarily bends away from the tower. Consequently, the blades can be designed with lower stiffness. For tubular towers, however, a significant deficit of the wind speed in the tower wake occurs, resulting in fatigue...
journal article 2020
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van der Male, P. (author), Vergassola, M. (author), van Dalen, K.N. (author)
To meet the political goals regarding renewable energy production, offshore wind keeps expanding to waters with larger depths and harsher conditions, while the turbine size continues to grow and ever-larger foundation structures are required. This development can only be successful if further cuts in the levelized cost of energy are established....
review 2020
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Armstrong, Michael (author), Ravasio, Matteo (author), Versteijlen, W.G. (author), Verschuur, D.J. (author), Metrikine, A. (author), van Dalen, K.N. (author)
Determination of soil material damping is known to be difficult and uncertain, especially in the offshore environment. Using an advanced inversion methodology based on multichannel spectral analysis, Scholte and Love wave measurements are used to characterize subsea soil from a North Sea site. After normalization, a determinant-based objective...
journal article 2020
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Sun, Z. (author), Kasbergen, C. (author), Scarpas, Athanasios (author), van Dalen, K.N. (author), Anupam, K. (author), Erkens, S. (author)
A non-destructive testing method suitable for network-level pavement structural evaluation is the traffic speed deflectometer (TSD) test. However, the analysis of TSD measurements still needs a proper parameter back-calculation procedure, which requires an accurate and efficient forward calculation model. As a first step to solving this issue...
journal article 2020
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Faragau, A.B. (author), Mazilu, Traian (author), Metrikine, A. (author), Lu, T. (author), van Dalen, K.N. (author)
Transition zones in railway tracks are areas with considerable variation of track properties (e.g., foundation stiffness) which may cause strong amplification of the response, leading to rapid degradation of the track geometry. Two possible indicators of degradation in the supporting structure are identified, namely the wheel-rail contact...
journal article 2020
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Sun, Z. (author), Kasbergen, C. (author), van Dalen, K.N. (author), Anupam, K. (author), Erkens, S. (author), Scarpas, Athanasios (author)
Maintenance and rehabilitation strategies of pavements are usually made based on the results of performance evaluation. An efficient tool for pavement structural evaluation at network level is the traffic speed deflectometer (TSD) test. In order to deal with TSD measurements, this paper proposes a parameter back-calculation technique. Firstly,...
conference paper 2020
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Faragau, A.B. (author), van Dalen, K.N. (author), Metrikine, A. (author)
poster 2019
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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
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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
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Sun, Z. (author), Kasbergen, C. (author), Scarpas, Athanasios (author), Anupam, K. (author), van Dalen, K.N. (author), Erkens, S. (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
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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
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Mazilu, Traian (author), Faragau, A.B. (author), Lu, T. (author), van Dalen, K.N. (author)
abstract 2018
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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
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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
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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
Faragau, A.B. (author), van Dalen, K.N. (author)
abstract 2018
Searched for: author:"Van Dalen, K.N."
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