Complex model tests on MOHO NORD Tension Leg Platform


144692


In an ambitious campaign the


MOHO NORD TLP was extensively tested in wind,


waves and current.


Arjen Koop & Jule Scharnke a.koop@marin.nl


14 report M


odel tests took place for the TLP alone, as well as with the TLP coupled to a semi-submersible.


For both configurations, in-place wave tests and VIM tow tests were carried out. MARIN’s capabilities and experience in complex model testing resulted in a very successful and interesting test campaign.


In-place tests were performed in the Offshore Basin with its 30 m deepwater pit, which is necessary to be able to model the TLP with its tendons over the full water depth. The TLP was moored by 12 tendons and connected


to a semi-submersible at a distance of 25 m by a hawser system. The semi-submersible will be used for tender assisted drilling in the first phase of the field development.


The complex hawser system was modelled by four bi-linear springs linked together to represent the non-linear stiffness charac- teristics of the prototype hawser lines. The semi- submersible was installed in the Offshore Basin with a truncated and bundled mooring system, representing the mooring system stiffness of the full depth system. In the coupled setup with the


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