Abstract
The work explains the rationale and principles behind the hydrodynamic design of a dynamically self-stable hybrid platform to host a 10 MW turbine that is a free-float capable tension leg platform, the CENTEC-TLP. It forgoes the often-studied single column hull form combined with spokes and investigates an alternative closer to the conventional TLPs while adhering to a limit hull weight. After an overview of the static stability characteristics of ocean platforms, an appropriate alternative is selected, resulting in a barge-TLP hybrid structure. In transport, it can float on a shallow draft with minimal response to wind and wave forces, and it safely functions as a TLP when installed. The safety check of the installed state is carried out by ensuring that slack moorings, mooring line breaking, and excessive surge motion does not occur. Each of these conditions is studied in rated and above rated operational conditions. A 50-year extreme case is also examined to verify that the structure survives.
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