DYNAMIC SIMILARITY OF ELECTRIC SHIPS’ PROPULSIVE COMPLEXES
Abstract
The purpose of the research is to develop methods for analyzing the maneuvering modes of ship propulsion systems based on the theory of dynamic similarity. Methodology. On maneuvers, all components of the complexes operate in transient modes, significantly influencing each other, therefore, the analysis of the operation modes of any component is considered in unity with the others. The necessity of transition to generalized mathematical models is substantiated. The dynamic similarity criteria are found. There is a possibility of broad generalization of research results. Results. A mathematical model and a method for calculating the transient modes of electric ships’ propulsion complexes have been developed. The generalized dimensionless parameters of the complex are found. The expediency of conducting research in relation to these parameters and dynamic similarity criteria are substantiated. A technique for conducting research using the provisions of dynamic similarity theory has been developed. The possibilities of using the technique are illustrated by the example of calculating the maneuvering characteristics and assessing the loads on the electric power plant when the electric ship enters circulation. The possibility of using the developed technique in the search for ways to improve complexes’ maneuverability is shown. Scientific novelty. The use of dynamic similarity criteria and generalized dimensionless parameters makes it possible to cover a large class of ships in research. Electric ships with equal values of similarity criteria and equal values of generalized parameters will have the same laws of change of regime indicators and equal values of maneuvering quality indicators. It becomes possible to level the influence of inaccuracies in the assessment of external factors on the results of research. Practical significance. The recommendations, analytical ratios, diagrams for assessing the quality of maneuvering, developed on the basis of the theory of similarity, cover a whole series of electric ships and are ready for use. They contribute to the construction of electric ships with predictable maneuvering properties. Bible 15, Tab. 2, Fig. 1.
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References
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