For
the input use has been made of an GUI. The chains, wires and
other mooring material can be introduced via the graphical
interface. The used mooring materials, wave- and wind
spectrum can be chosen from a database. The mooring lines,
anchors and field layout can all be input for the program.
This is done via simple click and drag input.
Solution:
GMOOR32 uses
the quasi-static mooring analysis method which assumes that
the vessel takes up a mean offset where the moorings exactly
balance the mean environmental loads (force and torque) and
oscillates about this mean position in response to wave
forces. The analysis method assumes that wave-induced surge,
sway and yaw motions of the vessel (at wave periods,
typically from 4 to 20 seconds) are not affected by the
mooring system. These assumptions are reasonable for all
large vessels with typical chain or wire moorings and are
accepted and widely used by both certification authorities
and designers. Low frequency (second order) motions can also
be calculated and included in the quasi-static analysis.
GMOOR32 calculates the mean and maximum line tensions,
maximum anchor loads, maximum and minimum lengths of
grounded line and vessel excursions for multi-leg catenary
mooring systems including the effects of seabed friction,
seabed slope and non-linear line elasticity. GMOOR32 has
been used for both design and verification of a wide range
of mooring systems. GMOOR32 can handle multi-component lines
(with intermediate buoys or sinkers), the calculation of
transient motion following sudden line failure, will
graphically display field features at the mooring location,
can simulate the action of thrusters and has the capability
to calculate environmental loads and motions from input
weather conditions. Used with RISERDYN, GMOOR32 can analyze
moorings with a marine drilling riser present to calculate
the profile of the riser and the interaction with the
vessel.