Searched for: contributor%3A%22Massie%2C+W.W.+%28mentor%29%22
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Veenstra, E.G. (author)
An ever-increasing number of cables and pipelines are being laid on the bottom of lakes, channels, rivers, seas, and oceans. Various hazards threaten these pipelines and cables, which in case of occurrence can cause (severe) environmental and/or economic damage. Pipelines and cables can be protected against these attacks by dumping protective...
master thesis 2005
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Veen, E.J. (author)
The downtime of a jetty terminal is one of the key factors in the planning and design of the onshore facilities. Long waiting times (downtime) due to restricting environmental conditions should be avoided. During the first design phase of a berth for Liquefied Natural Gas carriers many alternatives are open but no detailed calculations have yet...
master thesis 2003
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Kruijt, N. (author)
A contracting consortium, comprising the Turkish contractor Asim-Alarko and the Dutch contractor Van Oord ACZ, has submitted to the Turkish Water Authority a new concept for an offshore fresh water pipeline between Turkey and Cyprus. Where conventional offshore pipelines are laid on the seabed and are made from steel, this new pipeline concept...
master thesis 2003
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Van Iperen, E.J. (author)
Diffraction of both regular and irregular waves by a Concrete Gravity Sub-structure (CGS) was investigated using both experimental surface elevation measurements and computational results of the linear diffraction code DELFRAC. The influence of the box-shaped base that supports the four vertical columns was studied independently from the columns...
master thesis 2003
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Maréchal, S.E.M. (author)
Door de groeiende vraag naar diepwater-containerterminals worden deze de laatste tijd vaker op onbeschutte locaties aangelegd. Medio 2002 zal er begonnen worden met de aanleg van de Westerschelde Container Terminal in Vlissingen. Deze containerterminal zal "exposed" worden aangelegd, wat inhoud dat schepen aan de zeekade onbeschut tegen golven,...
master thesis 2002
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Böcker, B.M. (author)
The first platforms for oil and gas production in the North Sea have been installed around 1970. Since then about 500 platforms have been built to explore the North Sea oil and gas fields. Now, after 30 years of use, the first platforms are abandoned, creating a demand for innovative and economical removal concepts. Heerema Marine Contractors ...
master thesis 2001
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Van der Pluijm, D.A.N. (author), Voors, A.W. (author)
master thesis 2001
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Reinders, M. (author)
In this study the effect of a roughness discontinuity caused by a pipeline cover layer in the sea bed is investigated. As a result of this non-uniform flow configuration, the environmental forces acting on the pipeline cover layer change. To investigate the effect of roughness discontinuities, a numerical model of the flow is made; thereby...
master thesis 2001
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De Jong, E. (author)
Outfalls are built for the purpose ofdischarging sewage, storm runoff or cooling water into the sea. During the installation, outfalls are exposed to relatively large hydrodynamic forces compared to their own weight in case of adverse weather or high currents. To resist these forces, a heavy concrete weight coating has to be applied. With...
master thesis 1998
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Van den Bos, L. (author)
Een activiteit offshore valt of staat met de situatie op het water, de zee. Golven, stroming en wind en bijvoorbeeld mist zijn bepalend voor het al dan niet kunnen uitvoeren van deze activiteit. Een belangrijke oorzaak van verlet is het golfklimaat. In het afstudeeronderzoek "Bepaling van de Werkbaarheid van Materieel Offshore" is bekeken hoe de...
master thesis 1998
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Suastika, I.K. (author)
The purpose of this study is to develop a novel approach to offshore wave load analysis and apply it to the problem of ringing of gravity base structures. Ringing is a transient structural response at the natural frequency of the structure, that has been observed in model tests of gravity base structures. The observed response has relatively...
master thesis 1997
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Van Beek, B.A.W.J. (author)
When large steep waves interact with a dynamically sensitive structure, the extreme responses sometimes include a burst of significant structural dynamics: 'Ringing', which is like the vibration of a bell struck by a hammer. This behaviour indicates that the excitation is nonlinear. To explain this behaviour a third order fluid loading model has...
master thesis 1997
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Reys, R. (author)
Ocean waves are random and their crests evolve non-linearly. Yet commonly used wave models correctly incorporate only one of these aspects: the models either use non-linear regular wave theory whilst ignoring the randomness or use linear random theory with empirical corrections close to the free surface. For the more realistic design and re...
master thesis 1996
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Nederstigt, N.J. (author)
As a result of a number of causes, more and more human activities are shifting to offshore locations, resulting in a fast growing number of offshore structures. Not only the number of (planned) offshore structures increases, but also the diversity of the designs is growing. Nowadays these structures are often situated in deeper water. It is...
master thesis 1996
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Raaijmakers, R.M. (author)
For years it has been customary, in the prediction the Low Frequency (LF) dynamic behaviour of moored offshore structures, to assume that the mooring system only influences the restoring force characteristics. The contribution of the mooring system to the total system damping was neglected. Research and model tests in recent years have shown...
master thesis 1995
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Van Engelen, H.J. (author)
Onderzoek naar de invloed van drijvende golfbrekers op de kust van Delfland. Om de werking te zien van het zanddiode-principe in te zien, is zowel voor het langstransport als het dwarstransport, een mathematisch model toegepast op de Delflandse kust. Uit de berekeningen van het langstransport kwam naar voren, dat het mogelijk was om het netto...
master thesis 1995
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Van Dam, J.D.F. (author)
On January 1st 1992 one of the most severe storms passed by the Northern North Sea. The Shell/Esso Tem platform is located in that area, north east of the Shetland Islands and has monitoring equipment installed. Time series data for surface elevation and velocity are analysed to obtain estimates for surface and velocity spectral densities and...
master thesis 1994
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Bloemsma, M. (author)
The design and re-assessment of fixed offshore structures for operation in the harsh conditions of the North Sea is largely determined by extreme environmental loading. The ability to predict accurately the extreme storm load remains an important factor in the continued safe and economic exploitation of the hydrocarbon reserves in this area. The...
master thesis 1994
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van de Berg, J.E. (author)
master thesis 1992
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Kraneveld, M.R. (author)
In conventional practice extreme design conditions for offshore structures are obtained very conservatively by extrapolating 3-hourly statistics of wind, wave and current data to a (say) 100 year return level, assuming that the 100-year extremes occur simultaneously and act in the same direction. This study involves an alternative approach...
master thesis 1991
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