Analyses |
 
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Analyses |
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The end points of the floating hose are fixed to their respective vessels in all degrees of freedom. The positions of the semi-sub and the FPSO, and the relevant RAO data, are also specified. The initial analysis includes static loads such as gravity, buoyancy and current forces. The system is analysed quasi-statically to allow the hose to converge to its equilibrium configuration.
The master template file generates several regular wave input files of varying wave period, including wave periods of 8, 9, 10, 12, 14 and 16 seconds.
In each dynamic stage, a regular wave is applied. The wave amplitude is 3 metres, the period changes with each file, and the wave direction is aligned with the global Y-axis. The boundary conditions remain unchanged and are carried through automatically from the previous analysis stage. A variable time step is used to allow the software to use an optimal time step.
The outputs of the dynamic analyses, specifically the bending moments at either end of the floating hose, are collated into a single spreadsheet.