Maneuvering of two Interacting Ships in Calm Water

Abstract

The maneuvering of two interacting ships in calm water at Froude numbers less than ~0.2 and in water of infinite horizontal extent is studied based on an extended version of the maneuvering model for two ships by Skejic (2008). The time-varying interacting forces/moments and maneuvering hydrodynamic derivatives are obtained via a new method assuming 3D potential flow with a rigid-free-surface condition around non-lifting bodies. The two bodies can have any relative positions and move with any velocities in the horizontal plane. The method is verified and validated. The model is applied to an overtaking maneuver that was studied by Skejic (2008) documenting that it matters with the improved hydrodynamic interaction model.