Influence of thrusters on the electric ships’ maneuvering characteristics during their circulation run
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Abstract
The purpose of the study is to develop a method for assessing the influence of thrusters on the electric ships’ controllability indicators when entering circulation. When performing maneuvering operations, all components of the electric ships’ propulsion systems continuously operate in transient modes. The analysis of maneuvering properties in such conditions should be carried out considering the joint operation of all components of a ship’s propulsion system. The indicators of the Maneuverability Standard and the quality indicators of the functioning of the ship's electric power plant were chosen as the quality criteria. The calculation of the thrusters’ operating modes is based on an analytical method that allows estimating the thrust and resistance moment of the propellers in transient modes, taking into account the hydrodynamic processes of their interaction with the ship's hull. A method for assessing the maneuvering characteristics of propulsion systems has been developed, taking into consideration the loads on their electric power plants. The degree of influence of the ship's speed on maneuverability indicators when entering a curvilinear trajectory has been revealed. It is shown that the significant influence of thrusters on maneuvering characteristics is manifested at low speeds. The loads on the ship's electrical power system do not exceed the permissible limits. The calculation method makes it possible to evaluate the electric ships’ maneuverability indicators and the quality indicators of their electrical power plants. It becomes possible to predict maneuvering properties of ships’ propulsion complexes with thrusters. Applied programs and research results open up opportunities for optimizing the control of electrical power plants.
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References
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