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Bow outline of ship

A bow and ship technology, applied in the field of bow line shape, to achieve the effect of a wide range of speed

Active Publication Date: 2010-04-14
JIANGNAN SHIPYARD GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the three mainstream ships operate in the ocean with wave environment, facing the problem of seakeeping

Method used

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Embodiment Construction

[0020] The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing:

[0021] The bow line of the ship, such as figure 1 In the figure shown, most of the ship's bow contour centered on the design waterline is vertically downward. Such as figure 2 In the section lines shown, in the part below the design draft, within 3% of the length of the bow, the maximum position of the half-width of each section line is roughly at the position of 72% of the design draft, so that the lower half of the section line below the design draft The line shape is relatively thin, which is conducive to rectification; while the upper part below the design draft is relatively fat, which is conducive to reducing resistance through the favorable interference of wave-making; in addition, the change of line shape near the design draft and above the design draft is gentle, so that the power in the wave The increase is small (ie, the stall in the wa...

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Abstract

The invention discloses a bow line of a ship. The bow linear of a ship is characterized in that in the longitudinal profile of the ship, most part of the bow vertical line of the ship which takes thedesigned sea gauge as a center is vertically downward; in the transverse profile of the ship, the largest semi-width location of the bow to the bow vertical line in the range of 3 percent of the lengthof the ship is arranged between 60 to 90 percents of the designed sea gauge. The bow line of the ship has the beneficial effects that the invention absorbs the advantages of the bulbs designs of thes hips with low and high speeds as well as combines the advantages of the two to form a line which has no bulbs, but simultaneously considers the two effects of commutation and wave absorption of thebulbs; simultaneously the optimizing design on the aspect of seakeeping is carried out on the bow as the problem of larger stall ratio that is currently faced in large ship waves is considered, whichalsoleads the bow of the ship to have the advantages of smaller stall ratio in wave as well.

Description

technical field [0001] The invention relates to a bow line shape of a ship. Background technique [0002] Almost all modern ships, especially oil tankers, bulk carriers and container ships, have bulbous noses, which are almost an integral part of these modern ships. The ball nose has functions such as wave suppression and rectification. Wave suppression is to use the favorable interference of wave-making to reduce resistance. The mechanism of rectification is to reduce the possibility of vortex occurrence and also to reduce resistance. The use of ball noses for drag reduction on fast ships is mainly due to the wave dissipation effect of the ball nose, and the relative position of the center of gravity of the ball nose is relatively high; Its rectifying effect is becoming more and more dominant, and the center of gravity of its bulbous nose is roughly at the 50% design draft position, which is at a lower position. [0003] At present, the three mainstream ships operate in o...

Claims

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Application Information

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IPC IPC(8): B63B1/06B63B3/46
CPCY02T70/126Y02T70/10
Inventor 高斌陈兵胡可一
Owner JIANGNAN SHIPYARD GRP CO LTD
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