Motion analysis of a Semi-Submersible Crane Vessel at Inconvenient Draft: A flooding Tank approach

Conventional computer programs based on radiation-diffraction theory are not able to predict the motions of a semi-submersible crane vessel in case the pontoons are only slightly submerged. Cause of the erroneous results are non-linearities like breaking waves on top of the pontoons and emergence of the pontoons itself. Objective of this thesis was to create a numerical model, capable of calculating these motions. A free flooding tank approach is used in order to capture the non-linear behaviour of a body. A significant improvement is found.