A wave-frequency floating/transitioning jack-up motion model.
Jacksim is a powerful software tool for analysis of wave-frequency
motions of jack-up drilling vessels in the floating mode. In addition
to the six degree-of-freedom afloat motions capabilities common
to all SeaSoft motion offerings, this package includes:
- A sophisticated analysis of the dynamic leg loads associated
with going on location in the presence of waves. This feature
includes specification of ocean bottom soil conditions. The leg-load
estimation capability provides an important new tool for the
operational engineer or marine surveyor. This capability aids
in the quantification of the difficult and highly subjective
process of evaluating structural risks associated with going
on location in marginal sea conditions. The ease of use and microcomputer
execution capability of this program mean that the program load
estimates can be obtained in real time, on location, by the engineer
or surveyor in charge.
- A novel calculation of leg bending loads incurred going off
location in the presence of waves when one or more legs are trapped
or otherwise restrained by entrapment in soft bottom materials.
- A nonlinear hull and leg damping algorithm which leads to
realistic nonlinear response functions.
- Evaluation of vessel motion characteristics for any position
of the legs, from fully raised to fully lowered, and specification
of the degree of leg-well blockage by spud can insertion during
tow or other legs-elevated operations.