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MOSES REFERENCE MANUAL XII.M.7 Tug Connector Classes In MOSES, one can simulate the effect of a tug boat attached to a body. Basically, this is a connector that applies a force in a constant global direction. When dynamic simulations are considered, the force the tug applies varies with wave amplitude at the tug position. A tug connector class is described using: ∼CLASS, TUG BOAT, FORCE where the available options are: –T DYNAM, PERCENT FORCE, PHASE –DAMPING, C Here, FORCE is the force of the tug in bforce units. Statically, this force is simply the amount specified. Dynamically, the force varies according to %FORCE, which is the significant percentage of force change. PHASE is the phase angle in degrees, relative to the wave crest. This data is specified using the –T DYNAM option. The –DAMPING option defines a dashpot at the end of the tug with a constant C (bforce–sec/ft or bforce–sec/meter). Rev Page 239
