Influence of thrusters’ electric motors power on the maneuvering properties of electric ships
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Abstract
The aim of the study is to develop a method for assessing the impact of the thrusters’ electric motors power on electric ships’ maneuvering characteristics. The power of the thrusters’ electric motors on electric ships is comparable with the power of propulsion electric motors. In maneuvering modes, all components of the ship's electric power system constantly operate in transient modes. Analysis of the impact of the thrusters’ electric motors power on the electric ships’ maneuvering properties should be carried out taking into account the joint operation of all components of a single propulsion ship complex. The assessment method is based on a mathematical model of transient modes of propulsion systems. The calculation of the hydrodynamic characteristics of thrusters’ propellers is based on an analytical method that allows taking into account the processes of their interaction with the ship's hull in unspecified modes. The method for calculating transient modes makes it possible to assess the main indicators of maneuvering quality with simultaneous monitoring of additional loads on all components of the single ship's electric power system. The results of the study show that with an increase in the power of the thrusters’ electric motors, the maneuverability of ships improves. The electric power system is not overloaded. The degree of influence of the electric motors power on the maneuverability indicators of propulsion systems depends on the speed of the vessel's exit to a curved trajectory. Regularities in the influence of the power of the thrusters’ electric motors on the maneuverability indicators of electric ships are found. Proposals are formulated for a justified choice of the power of thrusters and forecasting the maneuverability of ships taking into account the capabilities of the electric power plant to ensure them. Bibl. 14, Table 1, Fig. 7.
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References
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