SHIP HULL Russian patent published in 2020 - IPC B63B1/06 B63B1/00 

FIELD: shipbuilding.

SUBSTANCE: invention relates to shipbuilding and can be used in structures of surface ships. Vessel hull comprises beads, bottom, aft end and nose end, which is provided with a projecting wave-piercing formation in the form of a bulb projecting in the nose direction beyond the limits of the zero theoretical frame with outlines of the lower parts of the buttresses and elongated in the vertical direction of the frame sections in the form of wedge-shaped tips. Bulb is made with such sharp bilges located above the structural waterline, such that the inclination angle of the tangents to the grounding contour located in 0-1 area of the theoretical frames varies in the bilge points in a stepwise manner by a value of not less than 28°. Bilge lines begin at the fore end point of the bulb and continue on the hull, decreasing in height, to 7–9 theoretical frames, and above the bilge lines there are chutes up to area of 7–9 theoretical frames. Length of the part of the bulb protruding in the nasal direction beyond the position of the lower point of the stem makes no more than 1.25 of the height of this part of the bulb. Hull cross-sections from 7–12 theoretical frames to 13–15 theoretical frames are made with rounding, besides, rounding radii increase in aft direction.

EFFECT: invention makes it possible to reduce water resistance to vessel motion at rough sea, intensity of rolling, loads acting on ship structures in conditions of rough weather, general vibration of ship and material consumption of structures, as well as to increase comfort and economic efficiency of ship.

3 cl, 6 dwg