Stem wave inhibiting and roll stabilization appendage

Abstract

The invention relates to the field of ships, in particular to a novel stem wave inhibiting and roll stabilization appendage which can reduce surface ship wave-making resistance, decrease the longitudinal swing amplitude of a ship among waves and accordingly improve the rapidity and seaworthiness of the ship. The stem wave inhibiting and roll stabilization appendage comprises at least one plate-shaped object installed on a stem, and the plate-shaped object is located above the still water surface at the stem when the ship floats under the normal displacement working condition. When the ship sails, the stem wave inhibiting and roll stabilization appendage has an inhibiting effect on waves made through the stem, wave energy is weakened, accordingly, the sailing resistance of the ship on the water surface is obviously reduced, and the rapidity of the ship on the water surface is improved; and in addition, when the ship sails among wind waves, the stem wave inhibiting and roll stabilization appendage can increase the ship longitudinal swing damping, so that the longitudinal swing amplitude of the ship sailing among the wind waves is decreased. The novel stem wave inhibiting and roll stabilization appendage can also decrease the phenomena of stem water shipping, deck wetness, stem slamming and the like.

Description

technical field [0001] The invention relates to the field of ships, in particular to a new bow wave-suppressing and anti-rolling appendage that can reduce the wave-making resistance of the ship on the water surface and reduce the swaying amplitude of the ship in waves, thereby improving the speed and seaworthiness of the ship. Background technique [0002] A ship is a waterborne platform that can float and sail on the medium of water. Generally speaking, in order for a ship to be able to reach the river and the sea and successfully complete the transportation of personnel, materials or other related tasks, it must have six basic navigation performances, namely buoyancy, stability, unsinkability, rapidity, maneuverability and seaworthiness. sex. The rapidity refers to the ability of a certain ship to achieve a certain sailing speed, and the minimum power of the main engine is required; in addition, when the ship sails in the wind and waves, there will be a swaying motion and...

AI Technical Summary

Problems solved by technology

The disadvantages of this technology are: different speed ranges correspond to different minimum wave-making resistance hull shapes, and it is difficult for one hull shape to achieve low resistance in the entire sailing speed range; and the shape of the hull is also affected by the buoyancy of the ship. , stability, ship layout and loading constraints, the space for ship shape optimization is limited

The disadvantages of this technology are: theoretical and ship test studies have shown that the application of bulbous bow technology to low-speed ships or medium-low-speed ships with the captain’s Froude number less than 0.34 can produce the effect of reducing wave-making resistance. For high-speed ships, the resistance is increased. of

The disadvantage of this technology is: the research shows that the drag reduction effect of the wave-absorbing hydrofoil can only be reflected in the extremely high-speed sailing condition where the captain's Froude number is greater than 0.6. At present, most ships in the world are not in such sailing conditions.

However, the phenomenon of the bow of the ship in the wind and waves, flooding of the deck, slamming of the bow and bottom, and seasickness of the crew are all directly related to the pitching. At present, there is no effective method for reducing the pitching of the ship.

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