РАСЧЁТ ВОДОИЗМЕЩЕНИЯ СУДНА ПО ЗНАЧЕНИЮ ЕГО ДЕДВЕЙТА

Abstract

When designing the capacity of a ship power plant, displacement is a key parameter both in calculations using the formulas of admiralty coefficients, and using diagrams of model tests. Taking into consideration physical essence of vessel displacement and deadweight, it has been assumed that there is a close correlation between them. On the basis of the analysis of 45 vessels including tankers, gas carriers, transport carriers, transport refrigerators, and 36 fishing vessels there has been carried out the analysis of correlation between deadweight and displacement. Advanced Grapher computer program has been used to reveal correlation between these two parameters, which allows to reveal correlation between two parameters using seven functions: linear, hyperbolic, logarithmic, power, exponential, indicative, and polynomial. All vessels have been divided into four groups: tankers and gas carriers, transport vessels (bulk carriers, motor ships, timber carriers, container ships), transport refrigerators, fishing fleet vessels (supertrawlers, big freezing fishing trawlers, full freezer trawlers, mid-size full freezer trawlers). For each group there was found the best correlation formula describing relation between deadweight and displacement. Following the analyses it has been stated that polynomial function is the best to describe correlation for transport vessels, and power function answers the others. Correlation coefficient values are within R = 0.962 ÷ 0.998. The dependences obtained are quite exact, so they are recommended to use in practice of schematic design of new vessels, and in preparing the final qualification papers for training area 26.00.00 "Technique and technology of shipbuilding and the water transport".