The aim of the project is to develop a numerical tool used to predict vessel motions of a turret moored
FPSO, then perform a comparative analysis between the 6 degree of motions measured on the FPSOs
during the 7 months period and the predictions from this numerical model.
The first step was to carry out statistical and extreme value analysis of the metocean data obtained
from hindcast and measured data, this gave an insight to the characteristics of the measured data and
how it closely relates to the hindcast. Next was to determine the response of the vessel based on the
basic assumption of the linearity of the vessel RAO and the assumption that the wave loading was
Gaussian. A Matlab code was written to determine the response of the vessel at each time step, a
major consideration that was included in this code was to account for the vessel heading and the
directionality of the wave at each time step. Finally results gotten were then compared to the
measured vessel motions.
In overall this study has provided a tool to describe vessel motions due to wave loading.
