A Functional Method for the Optimization of a Tension Leg Offshore Platform Orientation Utilizing CFD

The orientation and layout of an offshore platform can have a significant impact in developing a better and more informed design, keeping with the ISD principles. A case study will be discussed where STAR-CCM+ was integrated with additional analysis tools to optimize the orientation of a fixed offshore platform. It will demonstrate a technique to find the optimum platform orientation, i.e. the platform orientation which results in the best design compromise between specified parameters.

The optimum orientation of the platform with Platform North facing True East-Southeast, was obtained using simulation tools based on five design objectives: ventilation, exhaust, wind chill, lifeboat drift-off and tendon stress. The approach taken in this case study considers an early stage of design, with parameters covering both safety and operational issues. As the design progresses, the number of parameters considered is expected to change, as will their weighted contribution.