Justification and selection of the main characteristics of a small fishing vessel with a high body hull

The article discusses a reasonable choice of dimensions of a fishing vessel with a large coefficient of completeness. Vessels of this type are relatively new for the Russian Federation, therefore, in most literary sources, there is not enough information on the design of these types of vessels. The characteristics of the ship are determined by solving the classical design problem, using the main and secondary dependencies. In order to be able to draw up design equations, it was decided to perform an additional design study – the stage of the preliminary design. The purpose of this work is to develop the architectural and structural type of the vessel, to develop the general layout and fishing scheme, as well as to perform a number of design and verification calculations to determine the possibility or impossibility of creating a new vessel of this type that meets all modern requirements of the Rules of the Russian Maritime Register of Shipping. The result of the development of the preliminary design of the vessel is a prototype for compiling a system of equations in which the weight and size characteristics of the ship's hull developed at the stage of the preliminary design have been analyzed, as well as model tests have been prepared and carried out to assess the seaworthiness of the vessel and draw up the power equation. The solution of the system of design equations makes it possible to determine the main dimensions and other characteristics of the vessel for subsequent optimization transformations when designing a new project. In order solve the problem, a mathematical apparatus has been developed with design equations, including the equations of buoyancy, mass, capacity, waterline completeness factor, stability, power, elongation, longitudinal completeness factor, as well as boundary conditions and calculation of economic indicators of the future ship. The key indicator of the economic profitability of the project is the efficiency of capital investments. To search for the most efficient vessel, a variant calculation has been per formed – the solution of a system of equations with a variation of some initial data. According to the results of the variant calculation, the most successful combinations of the main characteristics of the vessel, providing the best economic performance, have been determined.

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