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Wide development of the Northern Sea Route is one of the main national projects of the Russian Federation. Solution of this large-scale problem is impossible without new types of ships, which are capable of working all year round among ice of polar latitude. These vessels are designed for different purposes, so that they are characterized by stronger hulls of ice class and new types of propulsion device – azipods, in other words – screw-steering columns. Rotating of azipods along vertical axis allows to direct propulsive force in arbitrary direction, which makes it possible to stop using rudder and move more efficiently. For example, proceed forward with stern of the ship. Ships with two azipods are of special effectiveness. With wide operation of new types of propulsion devices, it becomes necessary to include their particular mathematical models in general model of the vessel. This as well applies to azimuthal propulsion devices, known as screw-steering columns. Model becomes more complicated when the ship is equipped with two azipods, which influence each other during application in a particular way. The practicable way of research of such ships’ work is their mathematical modelling, which includes modelling of the hull of the ship, as well as the azipods the ship equipped with. Exactly this model is described in this research. The vessel with displacement of about 36000 tons is equipped with two azipods. Hull is described by the model in shifts, work of every azipod – by Hoffmann algorithm. Basic value of propulsion force of every screw of azipod before its turn is calculated with Lammeren curve of screw force.

Modelling of maneuvering of the ship equipped with two azipods