Searched for: subject:"rocking"
(1 - 20 of 118)

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Caldera, Ganga (author)
After the failure of several large breakwaters in late 1970’s and early 1980’s where the role of rocking and breakage of armour became apparent, the importance of understanding this rocking phenomenon is given a great emphasis. Single layer randomly placed armour units are widely used in breakwater designs as they are more economical due to the...
master thesis 2019
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Zaalberg, Piet (author)
OpenFOAM allowed the author to simulate a large number of scenarios in which the influences of cross-shore profile shape, cobble porosity, cobble diameter and layer thickness on wave overtopping were examined. Four validation runs and six simulations to map the sensitivity are compared with data from two physical experiments conducted in the...
master thesis 2019
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Grashof, Bernd (author)
Rock cutting is a challenging process. Heavy equipment, large cutting forces, high wear rates and large amounts of required energy are common challenges when cutting rock. Traditionally, rock cutting is based on a linear motion of the cutting tool. However, a significant improvement on the cutting performance is expected when using non-linear...
master thesis 2019
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Galanakis, Nikos (author)
This research describes the demand of a Displacement-based approach for the assessment of out-of plane behaviour of one-way vertically-spanning unreinforced masonry (URM) walls of terraced and detached houses in the Groningen Province. One of the most vulnerable components of a typical Dutch unreinforced masonry building subjected to earthquake...
master thesis 2019
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Olthoff, Tymen (author)
The consortium Projectorganisatie Uitbreiding Maasvlakte (PUMA), consisting out of Van Oord and Boskalis, constructed a hard sea defence for the protection of Maasvlakte 2, which is the expansion of the Port of Rotterdam. This hard sea defence consists of a Dynamic Rock Slope (DRS) with a Block Dam (BD) situated in front of it. The BD is build...
master thesis 2019
document
de Almeida Sousa, E. (author), van Gent, Marcel R.A. (author), Hofland, B. (author)
In order to design reliable coastal structures, for present and future scenarios, universal and precise damage assessment methods are required. This study addresses this need, and presents improved damage characterization methods for coastal structures with rock armored slopes. The data used in this study were obtained from a test campaign...
journal article 2019
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Olkowicz, Marcin (author), Dabrowski, M.M. (author), Pluymakers, A.M.H. (author)
In close-range applications, it is unclear whether optical photogrammetry is capable of accurately reconstructing submillimetre-scale roughness. This paper presents a study of fine-scale rock fracture roughness measurements with a careful assessment of the error. The workflow combines the techniques of structure from motion with focus...
journal article 2019
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van Gent, Marcel R.A. (author), de Almeida Sousa, E. (author), Hofland, B. (author)
Physical model tests were performed in a wave flume at Deltares with rock armoured slopes. A shallow foreshore was present. At deep water, the same wave conditions were used, but by applying different water levels, the wave loading on the rock armoured slopes increased considerably with increasing water levels. This allowed an assessment of the...
journal article 2019
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Bekkers, Rick (author)
In a world where the awareness of global warming and climate change increases, the shift towards sustainable energy is essential. In the upcoming years, an increasing number of offshore wind farms is expected. Over the past years, all the 'best spots' are taken and the new locations in tougher soil conditions or even rock have to be overcome....
master thesis 2018
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Abdullah, Muhammad Razin (author)
Hydrocarbon or geothermal reservoir often consists of several rock layers from different lithology. The various lithologies have their own number of mechanical properties and the layering effect introduced the term of mechanical contrast, which represents the ratio of rock strength between adjacent layers. Mechanical contrast and confining...
master thesis 2018
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Stoter, Mike (author)
Scarcity of (green) energy resources drives mankind further offshore and towards deeper waters. Protection of subsea infrastructure is of eminent importance in these environments. The key parameter to have a good control over the installation of rock is the falling time. For larger water depths up to 1200 meters, the accuracy of the falling time...
master thesis 2018
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Mohd Jamaludin, Muhamad Muizzudin Bin (author)
Dilatant fractures and faults in carbonate rocks play an important role as fluid path for many applications. However, multidimensional characterization of these fractures remains a challenge due to structural complexity in multiscale. The progressive deformation of dilatant fracture in normal fault system from physical models are imaged in 3D...
master thesis 2018
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Nishitsuji, Y. (author), Exley, Russell (author)
Machine learning methods including support-vector-machine and deep learning are applied to facies classification problems using elastic impedances acquired from a Paleocene oil discovery in the UK Central North Sea. Both of the supervised learning approaches showed similar accuracy when predicting facies after the optimization of...
journal article 2018
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Roebroeks, Joppe (author)
Geological surveying is a common practice performed by geologists nowadays. Determining layer orientation parameters and identifying folds are examples of features needed in order to create a geological map or model of the (sub) surface. Surveying is expensive and time consuming, therefore such survey is recently being investigated and...
master thesis 2018
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Feng, R. (author), Luthi, S.M. (author), Gisolf, A. (author), Angerer, Erika (author)
In this paper, geological prior information is incorporated in the classification of reservoir lithologies after the adoption of Markov random fields (MRFs). The prediction of hidden lithologies is based on measured observations, such as seismic inversion results, which are associated with the latent categorical variables, based on the...
journal article 2018
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Reinders, Jelle (author)
Subsea rock installation is widely applied in the offshore industry and utilized for a wide range of purposes including but not limited to: pipeline protection, scour protection, insulation of pipelines, upheaval buckling prevention and seabed preparation. Tideway Offshore Solutions is specialized in subsea rock installation and currently...
master thesis 2018
document
de Groot, L.V. (author), Fabian, Karl (author), Béguin, Annemarieke (author), Reith, Pim (author), Barnhoorn, A. (author), Hilgenkamp, Hans (author)
Obtaining reliable information from even the most challenging paleomagnetic recorders, such as the oldest igneous rocks and meteorites, is paramount to open new windows into Earth's history. Currently, such information is acquired by simultaneously sensing millions of particles in small samples or single crystals using superconducting quantum...
journal article 2018
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Shen, Y. (author), Wang, Jinguo (author), Lindenbergh, R.C. (author), Hofland, B. (author), Ferreira, Vagner G. (author)
The use of a terrestrial laser scanner is examined to measure the changes of rock slopes subject to a wave attack test. Real scenarios are simulated in a water flume facility using a wave attack experiment representing a storm of 3000 waves. The stability of two rock slopes of different steepness was evaluated under the set conditions. For...
journal article 2018
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Hofland, B. (author), Arefin, Syed Shamsil (author), van der Lem, Cock (author), van gent, Marcel (author)
This paper describes a method to measure the rocking motion of lab-scale armour units. Sensors as found in mobile phones are used. These sensors, data-storage and battery are all embedded in the model units, such that they can be applied without wires attached to them. The technique is applied to double-layer units in order to compare the...
conference paper 2018
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de Almeida Sousa, E. (author), van gent, Marcel (author), Hofland, B. (author)
In order to design reliable coastal structures, for present and future scenarios, universal and precise damage assessment methods are required. This study addresses this need, and presents improved damage characterization methods for coastal structures with rock armoured slopes. The data used in this study was obtained from a test campaign...
conference paper 2018
Searched for: subject:"rocking"
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