Searched for: subject%3A%22heave%22
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Willemstein, Lotte (author)
The Netherlands is prone to flooding as more than a quarter of the country lies under sea level. To combat flooding and ensure that the country remains dry structures such are levees and dikes have been installed. However, older water retaining structures are more than ever failing the stringent safety standard assessments. These older...
master thesis 2023
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Correia, Pedro (author)
Ship-to-Ship (STS) cargo transfers can significantly improve the efficiency of offshore installations while reducing their associated costs. However, the added complexity of cargo transfers involving ship-mounted cranes at sea poses significant challenges. To address this, crane manufacturers have introduced Relative Heave Compensation (RHC)...
master thesis 2023
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Güngen, Berna (author)
In current spatial orientation models, vertical acceleration (heave) is not coupled with pilot pitch perception, although such a coupling may be present. Therefore, in this study it is investigated whether a heave cue can increase perceived pitch in pilots.<br/><br/>Airline pilots (n = 20) performed a pitch perception task in a hexapod simulator...
master thesis 2022
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Grolman, Wouter (author)
The demand for renewable energies is rising due to climate goals and high oil prices. Not only the established renewable sources like wind and solar are interesting to exploit. There is a vast amount of energy stored in the world’s oceans. To harvest this energy, one needs a Wave Energy Converter (WEC). There<br/>are already some prototype WECs...
master thesis 2022
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Eijkhout, Thijs (author), Jovanova, J. (author)
Floating cranes have shown their benefits in port operations and in offshore tasks. With the increase of offshore wind farms, installation and maintenance of the wind turbines require crane vessels for multiple tasks. In order to operate in open sea regardless the ocean waves, active heave compensation system is necessary to be installed. In...
conference paper 2021
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Ouwehand, Tim (author)
With a global growing demand of energy, more offshore wind farms are installed, further away and in deeper waters. Nowadays, offshore wind turbines are mostly installed by jack-up installation vessels. Most existing jack-up vessels have legs that are becoming too short for these water depths while offshore wind turbines are increasing in size...
master thesis 2020
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Bots, Michiel (author)
Floating offshore wind turbines can only withstand a limited amount of (heave) motions before the equipment fails. In order to reduce the heave motion, the DeepCwind floater for offshore floating wind turbines makes use of heave plates. This semi-submersible floater consists of three cylindrical columns with a heave plate attached to the bottom...
master thesis 2020
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Dorgelo, Gerjan (author)
Currently, there is no infrastructure between the two Indonesian islands Flores and Adonara. The islands are separated by the Larantuka Strait, which has a width varying between 600 and 1000 meters. The local government would like a bridge between the two islands. However, as the water in the 18 meter deep strait is heavily subjected to tidal...
master thesis 2020
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Kohlmann, Lars (author)
The vertical viscous drag force acting on a heaving cylinder with flat and hemispheric bases is investigated by means of an experiment, a linear and a nonlinear analytic model. Viscous effects create a significant uncertainty in estimating the motion response of oscillating cylinders in waves of different frequencies. Forced oscillation tests...
master thesis 2019
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van der Doef, Laura (author)
With the shift of the safety standards for levees from exceedance probability (standard 1996) to flooding probability (new standard), the part of the levee failure process after the initial occurrence of a failure mechanism becomes more important for the calculation of the strength and thus, reliability of the levee cross-section. Interactions...
master thesis 2019
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Apon, Martijn (author)
The focus of this research was the implementation of a permanent steel fibre reinforced underwater concrete floor (SFRUCF) as a permanent structural floor. A model was created that can describe the soil structure interaction of an SFRUCF including the highly non-linear behaviour of SFRC. The soil structure interaction of the UCF was modelled in...
master thesis 2019
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Van Der Jagt, Joris (author)
In the transition to renewable energy, harvesting the power from oceanic waves is often mentioned to be next step after the deployment of wind energy technology. Although many different solutions for wave energy conversion (WEC) are being developed and financial support schemes exist, commercially extracting this energy seems however to be...
master thesis 2018
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van den Bos, Mats (author)
Allseas’ Jacket Lift System (JLS) is a system which is currently being developed and capable of transporting, installing and removing a jacket of a production platform as a whole. As the Block Handling System (BHS), responsible of maintaining tension in the main hoist wires by providing a constant tension (CT) counter force, is preferably...
master thesis 2018
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Al-Badri, Hoessein (author)
Steam injection is an EOR method, which is mostly used for heavy oil production. This viable method is based on increasing the pore pressure in the reservoir and reducing the viscosity of the heavy oil. In particular cases, the increase in pore pressure and thermal expansion related to the steam injection leads to surface deformation – heave....
master thesis 2017
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Verhage, Jaco (author)
Heave Compensation (HC) greatly improves the operability of lifting operations at sea, performed from ships under influence of heave motion. Especially with long cables and heavy payloads, the payload starts moving with larger amplitudes than the ship itself when no HC control is involved. HC aims to decouple the ships vertical motion due to the...
master thesis 2017
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Bui, N.C. (author)
The investigation into the dynamic behavior of a cable during installation was done with the aim of improving cable installation for safety, operational and commercial value. In order to increase the operational limit of the vessel during cable installation, the investigation into improvement systems was desired. The workability of a vessel...
master thesis 2016
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Nielsen, D.Y. (author)
The handling of a payload by a crane at sea poses numerous challenges. One of the main technical challenges is the movement of the vessel due to the hydrodynamic forces exerted by the waves. The resulting heave, pitch, and roll of the vessel results in time-varying crane-tip motion. This motion propagates to the payload through the rope and this...
master thesis 2016
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Van Beek, V.M. (author)
Backward erosion piping is an internal erosion mechanism during which shallow pipes are formed in the direction opposite to the flow underneath water-retaining structures as a result of the gradual removal of sandy material by the action of water. It is an important failure mechanism in both dikes and dams where sandy layers are covered by a...
doctoral thesis 2015
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Shrivastava, M. (author)
master thesis 2015
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Kanning, W. (author), Bocovich, C. (author), Schweckendiek, T. (author), Mooney, M.A. (author)
Piping failure of levees is one of the main contributors to flood risk. Piping occurs when the head difference over a levee results in uplift of the inland blanket, followed by backward erosion in the aquifer due to high local flow velocities. Whether piping occurs, highly depends on local geo-hydrological circumstances which are uncertain due...
conference paper 2015
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