In this paper are presented the methodology of calculation of hull resistance components, principal parameters of
a vessel, necessary for calculation of displacement in relation to vessel’s type. That methodology concerns analysis of
designing ways at early stage of ship’s power calculation. Ship owners' preliminary assumptions for new ship consist
of deadweight (for container vessel load capacity TEU), speed shipping line and others. Taking it as a base, in early
stage of design one has to select propulsion type. This goal needs definition of principal dimensions of a vessel, which
are the base for further calculations of hull’s resistance and evaluation of necessary power of main engine (engines)
to fulfil shipping requirements. In the paper, are presented major constraints for designing of new vessels coming
from ship-owner assumptions such as seafaring limitations and safety of shipping regulations due to Classification
Societies Rules or coming out from designing experience. In the paper are presented components of ship’s resistance
and methods of total resistance calculations what is a basis for power calculation and propulsion designing.
Moreover, are presented results of calculations of resistance components of different types of ships, and variety of
displacement and sailing velocity. It has to be assumed, that presented method concerns preliminary design stage and
can vary from different ships classes and constructions of hulls.
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