Minimum required propulsion power for FPSOs and FLNGs

Contrary to conventional conversion FPSOs, new-build FPSOs are not equipped with a propulsion system. This thesis explores the idea of installing a cost-effective low-power propulsion system on a new-build FPSO and letting it transit self-propelled to its destination, without compromising the safety. To this end, a computational tool is...

The development of a method to predict ship-bank interaction in real-time

Due to increasing marine traffic intensity on inland waterways the interaction between ships and banks is becoming more of a problem. Bank effects make ship manoeuvring more difficult and rivers need to be protected against ship-induced currents and waves. This thesis contributes to the development of a new method that simulates these ship-bank...

The suitability of the Moormaster TM system for inland shipping: Considering quay side mooring in the Amsterdam-Rijnkanaal under the influence of passing ships

The suitability of the MoorMasterTM system by Cavotec MSL in inland shipping is researched. It is an innovative mooring system using vacuum pads with active motion control, utilising a PID controller. A case study of a 110m Large Rhine vessel moored directly beside the Amsterdam-Rijnkanaal (ARK) is performed. In order for the system to be...

Assessing the dynamic stability of a floating tidal energy platform during ballast operations

A method is developed to assess the dynamic stability of a floating tidal energy platform during ballast operations. This method is applied to a tidal energy platform designed by Bluewater Energy Services B.V., showing the sensitivity of this platform’s dynamic stability during ballast operations to tidal current velocity, changes in lightship...

Flow beneath inland navigation vessels

Growing transportation rates and the subsequent growth in inland waterway transport have led to an increase in inland vessel sizes and draught. Due to the fluctuating water levels on rivers and these increasing draughts, the distance between the river bed and the ships are decreasing. Rijkswaterstaat wants to know the effects of sailing at these...

Numerical modelling of bow thrusters at open quay structures

Introduction Bow thrusters are of great help for the navigation at quay walls, but the high and turbulent velocities can result in a bed load exceeding the strength of the bed or bed protection. To be able to design a stable bed the velocities at the bed need to be accurately determined. In design practise the velocities generated by a propeller...

Investigation of inland ship resistance, propulsion and manoeuvring using literature study and potential flow calculations

Manoeuvring simulations can be of good use in determining whether an inland ship may be allowed access to a certain channel/river or not. The SURSIM mathematical model is able to predict the necessary manoeuvres and can therefore be used to determine the acceptance of ships on fairways. However, the SURSIM program is mostly developed for use...

Pumpjets in de binnenvaart

Bigger ships are replacing the small ships, also at the Amsterdam-Rijnkanaal. A direct consequence is the use of larger main propellers and increased installed engine power in order to realize acceptable ship speeds. To improve the maneuverability, the power of auxiliary bow and stern propulsion systems has increased as well. This results in...

Probabilistische Diepte Modellering Binnenhavengebied Haven van Rotterdam

In dit rapport wordt een probabilistisch (diepte-) ontwerp gepresenteerd voor het binnengebied van de haven van Rotterdam. Ook worden de mogelijke faalmechanismen (bodemberoering en verminderd manoeuvreerbaarheid) bestudeerd. Als referentie modellen zijn bestudeerd de modellen Harap en Protide van Rijkswaterstaat, en CADET van US Army Corps of...

Structural Design Analysis of a Sustainable Energy Wave Rotor

The growth in the market of ocean energy turbines has lead to the design of a prototype that is able to convert both tidal and wave energy into electrical energy. In this research, a finite element (FE) model of the combined Wells and Darrieus water turbine is developed. This model is verified with strain gauge measurements of the prototype that...

Doorsteek Maasvlakte 1 & 2

Maasvlakte 2 is het project waarmee de haven van Rotterdam wordt uitgebreid. Het sluit direct aan op de huidige Maasvlakte. De havenbekkens van beide Maasvlaktes worden verbonden door de Yangtzehaven in westelijke richting door te steken naar Maasvlakte 2. De doorsteek bestaat uit een voorfase waarin een kanaal wordt gegraven ten behoeve van de...

Modeling the dynamics of a spar-type floating offshore wind turbine

The installation of floating wind farms in deeper water is encouraged by the stronger and steadier wind, the lower visibility and noise impact, the absence of road restrictions, but also the absence or shortage of shallow water. In the summer of 2009, the first large-scale floating wind turbine "Hywind" was installed. Hywind is a spar-buoy...

Development of a multiobjective design optimization procedure for marine propellers

The design of a marine propeller is characterized by its complexity rather then its shortcoming of knowledge how to asses its performance. There are several constraints to satisfy and all are in a different field. The three major considerations are strength, performance (efficiency) and cavitation behavior. There is not a perfect design...

On the generation of surfable ship waves in a circular pool: Part I: physical background & wave pool design

Surfing as a sport is growing. Locations with good surfing conditions are limited and therefore crowded. The growing interest for the sport led to a new concept, surf pools. Surf pools mimic good surfing conditions found along the coast. This thesis is about the technical feasibility of a new surf pool concept, creating surfing waves in a...

On the generation of surfable ship waves, Part II: The application of stereo photo technique measuring water surface elevation and surface flow velocities

Wave pools are designed to mimic surfing conditions as they exist along coasts. The Liquid Time Wave Pool concept, invented by Greg Webber, suggests a new method for wave generation. Waves are generated by a hull which moves in a channel. These "ship waves" break on a slope creating surf. Key feature of the concept is to make ship waves surfable...

Improving the hydrodynamic performance of a combined Wells-Darrieus rotor