Elementary Loading Processes (ELP) involved in breaking wave impacts: findings from the Sloshel project

AuthorsW. Lafeber, L. Brosset, H. Bogaert
Conference/JournalISOPE 22th International Offshore and Polar Engineering Conference, Rhodes, Greece
DateJun 1, 2012

MarkIII is one of the containment systems designed by GTT for LNG storage or transportation. It features a corrugated stainless steel membrane which modifies locally the flow of LNG in the tanks of LNG carriers, hence modifies the loads during sloshing impacts.The interactions between breaking waves and the MarkIII corrugated membrane were described in Bogaert, Brosset and Kaminski (2010). The observations were based on the large scale impact tests of the Sloshel project performed in 2009. In this paper, these interactions are described again but based this time on the Sloshel full scale impact tests performed in 2010.Qualitatively, the interactions observed at full scale are very similar to those observed at scale 1:6. However, full scale measurements allow a more in depth analysis of the local phenomena involved. The paper shows that the different kinds of interactions between breaking waves and either a flat or a corrugated wall induce loads that are combinations of only a few Elementary Loading Processes (ELPs): 1. direct impact, 2. building jet along the wall from the impact area and 3. compression/expansion of entrapped or escaping gas.

Tags
waves, impacts and hydrostructuralrenewablesoil and gasinfrastructuremarine systemslife at seamonitoringtrials and monitoringsloshingfull scalelngoffshore engineering