Abstract

Combined vessels of various architectural and structural types can be used to increase the efficiency of oil-loading transportation by water transport. On inland waterways, the most perspective vessels are the tanker/platform type, carrying the main (bulk) cargo in the hull and the return (dry) on the platform equipped on an open deck. The article presents a general mathematical model and an algorithm for selecting elements and characteristics of the specified type of vessels, allowing them to be optimized in various operating conditions with specified initial data. The carried out extensive test calculations, systematized and presented in the form of graphical dependencies, show the effect of the stroke speed on the coefficient of the overall completeness of the hull at various backloading volumes, the efficiency in the form of the relative profit of a combined vessel compared to a "clean" tanker from the share of backloading and the ratio of freight rates for dry and liquid cargo. The low dependence of the relative profit on the length of the lines of operation is also shown.

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