Seakeeping behaviour of a frigate-type trimaran
Author Pastoor W., Veer R. van't and Harmsen E.
Title Seakeeping behaviour of a frigate-type trimaran
Conference/Journal RINA conference on trimaran, London, UK
Year 2004

In the past 10 to 15 years a significant amount of research and development has been devoted to the application of the trimaran concept for both navy and commercial purposes and this has been reported in numerous publications. The trimaran looks similar to a conventional monohull, as the side-hulls are usually very small. However these side-hulls can have a significant effect on the dynamic behaviour of the vessel and thus the seakeeping performance and the wave-induced structural loads. Being capable of using numerical tools in the design phase of trimaran vessels is of great importance in order to optimise the vessel for seakeeping performance and to develop realistic structural designs and weight estimates.

The Royal Netherlands Navy, RNLN, operates a fleet of 12 modern frigates of different types with sizes from 3300 to 6000 tons. Consequently, there is a continuous process of study and development into new concepts and designs for frigate type ships, like SES, SWATH and trimaran vessels.

Model tests play a central role in validating numerical tools, they provide insight in physical phenomena and they are used as verification of (final) design characteristics. Developing numerical prediction tools and providing advanced model test capabilities is key competence for the Maritime Research Institute Netherlands and have thus a long history of co-operation with the RNLN.

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