Chapter 3 - Dynamics of Marine Vessels

2
3.2.4 Ballast Systems
A floating or submerged vessel can be pretrimmed by pumping water between the
ballast tanks of the vessel. This implies that the vessel can be trimmed in heave,
pitch and roll:
z zd, d, d 3 modes with restoring forces/moment
Steady-state solution:
where
Ṁ X C X D X g Xgo w
g d g o w
d −, −, −, zd, d, d, −
main equation for ballast computations
The ballast vector g o is computed by using hydrostatic analyses.
Ivar Ihle – TTK4190 Spring 2006