MULTI-PURPOSE DRY CARGO VESSEL FOR ICE NAVIGATION

摘要

FIELD: shipbuilding; multi-purpose dry cargo vessels for carrying cargoes in water areas covered with ice and not covered with ice.;SUBSTANCE: proposed multi-purpose dry cargo vessel has hull with fore and aft extremities and sides provided with ice strengthening members. Hull bottom in aft extremity has inclined surface. Extent of cargo holds is no less than half length of vessel and maximum breadth is no less than ¾ of ship's extreme breadth. Main propulsion plant with propulsor is swivel in construction. Slewing axis of main propulsion plant is deflected at angle α from vertical in CL or in plane parallel to CL. Axis of thrust vector is also inclined at angle α from normal relative to slewing axis of main propulsion plant. Angle satisfies condition 0α≤β/2, where β is angle whose magnitude is equal to magnitude of average angle of inclination of ship's bottom surface in aft extremity relative to ship's waterplane on inclined section of bottom located below level of point of intersection of main propulsion plant slewing axis with propulsor thrust vector axis.;EFFECT: reduced usage of material; enhanced survivability and durability of vessel.;15 cl, 4 dwg