On the roll damping of surfaced submarines

This thesis investigates the roll damping of surfaced submarines. Modern diesel-electric submarines can spend a significant time sailing in surfaced condition. When sailing in this condition, the submarine will roll due to the excitation by waves. The (very) large rolling angles that occur are bothersome to the crew and possibly dangerous to the...

Recovery of an Autonomous Underwater Vehicle by jumping out of the water like a penguin

This reports outlines the results of an investigation into the feasibility of recovery by jumping on a platform like a penguin, compared to performance of existing recovery systems. The enquiry begins by introducing the model that has been developed to simulate the hydrodynamics of the AUV, including the implementation of water exit and orbital...

The applicability of Fredyn in the design of an Axe Bow frigate with skegs

The applicability of Fredyn in the design of an Axe Bow frigate with skegs

Recovery of an autonomous underwater vehicle

Turning a length of oil absorbent: A numerical simulation

Mathematical modeling of free-flooding anti-roll tanks

One way of stabilizing a ship is by anti-roll tanks. There are three kinds of anti-roll tanks: the free-surface, U-tube and free-flooding tanks. Of these the free-flooding anti-roll tank is the least known and applied. The reason is that the performance of these tanks is reduced due to a momentum drag penalty incurred at forward speeds. This...

Concept design of an installation vessel to install fully assembled next generation offshore wind turbine generators

Turning a Length of Oil Absorbent A Numerical Simulation

The Aero-Hydrodynamic Characteristics of Yachts Sailing Upwind in Waves

A common practice during the design of a sailing yacht is to assume an ideal environment. The wind is constant in intensity and direction and the sea is calm. In this situation, an equilibrium between the aerodynamic and hydrodynamic forces and moments can be found. The equations of equilibrium are thus solved to find the best setup (combination...

New Rowing: Play the Sea. Design of the Volans Coastal

In July 2011, the Volans2 was introduced on the market. It is a single skull, recreational rowing boat designed for a wide public to make the rowing sport more accessible. The design is compact and light, challenging for rowers of variable levels. The implementation of a sliding rigger system (in which the rigger slides instead of the seat)...

Providing current forecasts for the 2012 Olympic Sailing Competition by means of a finite element based numerical flow model

This project focuses on studying and modelling the flow in the sailing area of the 2012 Olympic Sailing Competition, located partly in Portland Harbour and partly in Weymouth Bay, in order to provide accurate and reliable current forecasts for the Dutch Olympic Sailing Team. From literature it follows that the main flow in the area is the tidal...

Application of the computational fluid dynamics solver FLUENT to keels of sailing yachts

The keel of a sailing yacht has been shown to constitute a significant part of the overall resistance. Where the details of this effect are not yet fully understood, Computational Fluid Dynamics (CFD) analysis might reveal mechanisms unseen to the experimental eye. An important step in CFD application is the simulation of a number of validation...

An alternative approach to determine the time to sink of damaged vessels

Modelling operator behaviour: An experimental approach to model operator behaviour on board fast RIBs

The main aim of this thesis is to develop an operator behaviour model on board fast RIBs.

Investigation of Nonlinearities in the Superposition of Ship Motions by 6DOF Forced Oscillations