Screening to find critical wave events for green water and slamming
Conference/JournalMARIN Report 139
Date29 mrt. 2024
Recent accidents underline the importance of designing for loads that occur due to extreme waves impacting marine structures.
This was illustrated by an accident in the North Sea in December 2023, when the cruise ship MS Maud lost the ability to navigate after a big wave smashed the windows of the bridge. No casualties were reported, but unfortunately this is not always the case. In December 2015, a crew member died when a large wave hit the living quarters of the semi-submersible platform COSL Innovator close to Norway.
This was illustrated by an accident in the North Sea in December 2023, when the cruise ship MS Maud lost the ability to navigate after a big wave smashed the windows of the bridge. No casualties were reported, but unfortunately this is not always the case. In December 2015, a crew member died when a large wave hit the living quarters of the semi-submersible platform COSL Innovator close to Norway.
Contact
Sanne van Essen
Senior Project Manager
EXTREMELY COMPLEX TO CALCULATE
Defining design loads for such wave impacts is not easy. Impacts do not happen often, and the associated loads are extremely complex to calculate. This means they have to be evaluated for very long durations in order to get enough events for a meaningful statistical analysis.
Waves and wave-induced loads are also stochastic, meaning that although they can be described with a probability distribution, they cannot be predicted precisely. The longer you sail, the higher the maximum load that you experience will be.
Waves and wave-induced loads are also stochastic, meaning that although they can be described with a probability distribution, they cannot be predicted precisely. The longer you sail, the higher the maximum load that you experience will be.
Green water event during the SCREAM experiments
CFD reproduction of a green water event from the CRS Greenwater experiments. (credits Joop Helder)
Green water event during the SCREAM experiments, with the ferry sailing in bow-quartering waves with a significant wave height of 8.1 m and a peak wave period of 9.4 s
Green water event during SCREAM experiments (left) and the result of a CFD calculation initialised using linear potential flow screening in the same event (right). (credits Arjen Koop and Tim Bunnik)
Tags
wave measurementsslammingcfd