Publicaties

Ships sailing in shallow and/or confined water (when calling a harbour or other berthing areas), will experience a different behaviour due to the interaction with vertical and/or horizontal boundaries. Among other hydrodynamic changes induced in confined water, the lateral ship-bank interaction force changes its sign at a critical distance between ship and bank or bottom. However, this distance and its effects on model test results have not been ...

After successful conferences focussing on specific shallow or confined water challenges, the Sixth International Conference on Ship Manoeuvring in Shallow and Confined Water (6th MASHCON) has a non-exclusive focus on port manoeuvres. Many of these manoeuvres occur in the vicinity of moored ships, leading to passing ship effects on the moored ships. These forces are potentially very large in magnitude and are typically long period excitations, ...

With the rapid increase in ship size, the definition of the nautical bottom is becoming more crucial for ports and waterways authorities worldwide. Previous theoretical and experimental research has demonstrated that under certain conditions it is possible to sail through fluidized mud. However, in most numerical models, the complex rheological behaviour of the natural mud is simplified and treated as a Newtonian fluid. To better understand the ...

This work aims to contribute with validation material for numerical solvers intended to model sailing bodies in realistic muddy environments. A series of towing tests with a 0.16 m chord surface-piercing hydrofoil were performed, including a variety of UKCs and drift angles. These tests were carried out in freshwater, seawater, and natural mud obtained from the Port of Antwerp-Bruges. The different hydrodynamic forces and rheological ...

To extend the knowledge on ship manoeuvring and predict ship's behaviour accurately from medium deep to very shallow water, this paper comprehensively investigates water depth and speed effects on ship's manoeuvrability, steering model and motion control through experimental studies. Free running model tests at four water depths and six speeds were conducted using a scaled ship model in the towing tank at Flanders Hydraulics Research (FHR). The ...

This paper describes a coupled numerical model between a state-space model based on the Cummins’ equation and a lumped-mass mooring line solver for simulating moored floating structures. Viscous effects acting on the floating structure are taken into account using the quadratic term of the Morison equation. Additionally, wave induced loads acting on the mooring lines are also taken into account. The state space model has been validated using ...

Real time ship manoeuvring simulations are a valuable source of information in the detailed design phase of nautical studies. The feedback of pilots, which is not available for fast time simulations that are carried out by a computerized autopilot, is an important asset in the evaluation of the feasibility of ship manoeuvres. However, real time simulations are significantly more expensive in that realistic 3D visuals are needed so that the pilot ...