Searched for: subject%3A%22Hydromechanics%22
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Bziker, Farah (author)
Traditionally, the control point (CP) of a dynamically positioned vessel is located around its center of gravity (CoG). However, during offshore operations, other locations, such as the crane tip or gripper position, become more critical due to the load being located there. This thesis proposes shifting the control point from the CoG to an...
master thesis 2023
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Mikail, Davey (author)
The increasing demand for renewable energy sources, to achieve ‘green goals’ such as the Paris agreement, and their related projects, are becoming increasingly challenging to accomplish. Nowadays, offshore wind farm projects move into deeper waters and require larger individual Offshore Wind Turbines<br/>(OWT’s), which results in larger...
master thesis 2022
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Zheng, X. (author)
Large deformations in fluid-saturated geomaterials are central to numerous geotechnical applications, such as landslides and dam failures, pile installations, and underground excavations. An in-depth understanding of the soil's hydromechanical behaviour during large-deformation processes is essential for quantitative predictions about such...
doctoral thesis 2022
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Zheng, X. (author), Pisano, F. (author), Vardon, P.J. (author), Hicks, M.A. (author)
This paper presents a single-point Material Point Method (MPM) for large deformation problems in two-phase porous media such as soils. Many MPM formulations are known to produce numerical oscillations and inaccuracies in the simulated results, largely due to numerical integration and stress recovery performed at non-ideal locations, cell...
journal article 2021
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Verbeeten, Gijs (author)
During the past decade, the offshore wind energy industry evolved to bigger turbines, going into deeper waters and farther offshore. As bottom-fixed wind turbines are limited to shallow water depths, floating wind structures are the next frontier to unlock the vast potential of wind energy. Despite many techno-economic challenges, several full...
master thesis 2020
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Azizi, Arash (author), Musso, Guido (author), Jommi, C. (author)
Soils used in earth construction projects are mostly unsaturated, and they undergo frequent drying–wetting cycles (repeated hydraulic loads) due to changes in climatic conditions or variations of the ground water level, particularly at shallow depths. After compaction, changes in water content can significantly influence the hydromechanical...
journal article 2020
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Musso, Guido (author), Azizi, Arash (author), Jommi, C. (author)
The paper focuses on the hydromechanical behaviour of an unsaturated compacted clayey silt, accounting for fabric changes induced by drying–wetting cycles occurring at low stress levels. The response along isotropic compression and triaxial compression (shear) at constant water content was investigated by laboratory tests on both as-compacted...
journal article 2020
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van der Heiden, Joost (author)
When lifting operations are performed by a heavy lifting vessel, the motions of the vessel and cargo are predicted by conventional six degrees of freedom calculations. It is assumed that the cargo is attached to the crane top in order to decrease the stability of the vessel and perform accurate calculations. While these conventional calculations...
master thesis 2019
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Werkman, Joren (author)
The comfort assessment of ships is based on several criteria. There are for example criteria for motions, noise and vibrations. The criteria for motions are nowadays often defined as comfort limits on the accelerations in the ship motions. However, from other industries it followed that the rate of change of the accelerations, the jerk, can also...
master thesis 2019
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Liu, Yun (author)
Nowadays, fears over rising sea levels due to global warming have prompted many countries with lands below sea level to find solutions to ensure the safety of nation and citizen. Furthermore, the development and utilization of marine resources have always been a topic of interest. Due to these necessities, the concept of flexible floating...
master thesis 2019
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Meijer, Moos (author)
In numerical methods, correct geometry description and mesh refinement are a challenge. By using a more geometrically based Finite Element Analysis (FEA) type method called ‘Isogeometric Analysis’ (IGA), exact geometry description can be attained, even on coarse meshes. Furthermore, mesh refinement is relatively easy, since no communication with...
master thesis 2018
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Teeuwen, Niek (author)
For the real-time simulation of ship manoeuvring, it is required to estimate the hydrodynamic forces with high accuracy. Current methods to determine the hydrodynamic coefficients prove to be time consuming and labour intensive. In this thesis, a method based on Singular Value Decomposition is proposed to determine the hydrodynamic coefficients...
master thesis 2018
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Hendrikus Yun Fredo Ferdian, Fredo (author)
In the last couple of decades, Arctic Engineering has become a topic of interest. There are still plenty rooms of research to understand the unique characteristic of sea ice, especially in relation to offshore engineering. This includes the most fundamental problem in floating body motion analysis: the radiation-diffraction problem. A powerful...
master thesis 2017
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de Feijter, T.S.J. (author)
The Ocean Cleanup’s goal is to extract, prevent and intercept plastic pollution by initiating the largest clean-up in history. It aims to achieve this by installing a large moored floating barrier, which passively concentrates the plastic debris using the ocean currents. In this thesis an alternative to this concept is developed and evaluated....
master thesis 2017
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Skandali, D. (author)
Heerema Marine Contractors (HMC) operates several crane vessels, barges and tug boats for the transportation, the installation and the removal of offshore facilities. To achieve safe and successful projects, the accurate prediction of vessel motions is of great importance. Vessel motions are calculated on the basis of wave energy spectra and...
master thesis 2015
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Struijk, G.D. (author)
With fuel oil the main driver for operational expenses, increasingly stringent regulations on emissions of ships and a growing environmental awareness throughout the industry, the concept of Wind-Assisted Ship Propulsion (WASP) presents itself as a means to reduce fuel consumption. Though a promising concept, the performance prediction of a wind...
master thesis 2015
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Yousefnezhad, Reza (author), Zeraatgar, Hamid (author)
journal article 2014
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Marie, Stephane (author), Courteille, Eric (author)
journal article 2014
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Kubo, A. (author), Yajima, H. (author), Aihara, S. (author)
journal article 2013
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Garland, William R. (author), Maki, Kevin J. (author)
report 2012
Searched for: subject%3A%22Hydromechanics%22
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