Abstract

Ice action on ships occurs when a ship collides with an ice feature – be that level ice, ice floes or iceberg s. The total force acting on the ship depends on the motion of the ice feature and ship. The motion includes rigid body motions (in 6 DoF for ship and ice), elastic deformations of ship and ice and irreversible deformations (ice crushing and ship hull plastic deformation). In principle all these should be taken into account in modeling the collision and the total force. Several simplifications have been made and the lecture describes some of the modeling that has been carried out in order to determine the total collision force. An interaction exists also for local ice loading i.e. ice pressure. In this case the local deformation of the ship hull interacts with the deformation of ice. One example of this is given also in the lecture.