| dc.description.abstract | This thesis investigates the uncertainty of a safety operating envelope (SOE) for a subsea
shuttle tanker (SST). The main focus of this work is on the jam-to-rise and jam-to-dive aspects
of the accidental cases for the SOE. The SST is investigated using a pitch angle of 10- 15- and
20- degrees for rising and diving. The findings of the free-running simulations, which take into
account two current directions and load instances of 0.5 and 1 m/s with 5% and 10% standard
variation, while using the Gumbel fitting method, revealed increased recovery depth differences
ranging from 0.97% to 21.44% for the jam-to-rise scenario, and 0.42% to 11.26% for the jam-to-dive scenario for the 15-degree pitch angle cases. The cases with 10- and 20-degree pitch angles
show similar percent differences. Future studies may look at how differences in recovery depth
caused by current directions coming from different angles, such as a 60- and 120-degree angle,
might significantly affect the results. To estimate the possible recovery depth and compare it to
the Gumbel values in order to get more accurate results, other statistical techniques might be
utilized, such as the Average Conditional Exceedance Rate Method | |
