Reducing large design loops for yacht concepts
Bringing MARIN in at the start of new concepts can be extremely
beneficial for clients, particularly when a novel propulsion system or unusual ship shape are being investigated.
MARIN is involved in the whole development chain of a ship or offshore structure, from the first concept to model test verification and full-scale monitoring. When MARIN is at the start of a new yacht concept, as experienced by Feadship (see separate arti- cle), the project can benefit from less design loops later in the detailed engineering phase. Preliminary performances such as speed, motions, comfort and manoeuvra- bility, are quickly assessed and comparisons between several design options are easily made.
Enrico Della Valentina
e.valentina@
marin.nl
MARIN wants to show clients what they can achieve and to that end, we work with the client to consider the main design crite- ria. Comparisons between a vertical bow and a traditional one, with or without bulb are made. The optimal dimensions of the propellers and their clearance with the hull are looked into and in the same way, the dimension and position of the rudders, and
the sizing and power of bow/stern thrusters for DP applications are considered. Pros and cons of a hybrid propulsion system versus a traditional one are examined and also the benefits of a different gearbox ratio and the selection and assessment of stabilisation systems. In other words, we explore all the different design options together.
This is easily done using various software programmes. Slowly but steadily, simulation and CFD tools are being coupled and are a perfect way to consider the criteria, even with limited input. And these tools grow within the project – once the initial design exploring loops are done, these tools function as accurate verification tools.
Some clients have already turned to MARIN to discuss their concepts at the very begin- ning of the design process, as you will see in this issue. We invite other innovators to do the same.
For Feadship’s Predator MARIN conducted CFD calculations, model tests and full-scale trials
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