Bulbous bow refit technology

Abstract

The invention provides a bulbous bow refit technology. The bulbous bow refit technology comprises the three main processes of manufacturing of a new bulbous bow, removing of an old bulbous bow, and hoisting of the new bulbous bow. During hoisting of the new bulbous bow, an original ship center line, a rib position line and a horizontal detecting line are drawn on an original ship outer plate, projection lines of the original ship center line and the rib position line are drawn on the dock floor, and by combining a floating crane, a large segmented positioning tool and a segmented positioning trolley and taking the center line, the rib position line, the horizontal detecting line and the projection lines of the center line and the rib position line as the standard, precise positioning of the new bulbous bow in transverse, longitudinal and height directions is achieved. The bulbous bow refit technology can fully utilize existing equipment to shorten the docking period, and operation is accurate and quick.

Description

technical field [0001] The invention belongs to the technical field of ship building, and in particular relates to a bulbous bow refitting process. Background technique [0002] The bulbous bow is the spherical protruding part below the water surface of the bow of the ship. When the size and shape of the bulbous bow match the hull and speed of the ship, it can turn the wavy water waves generated by the ship's side by 180 degrees, offset the resistance of the waves to the ship, and reduce the ship's navigation. Otherwise, it will bring greater resistance to the navigation of the ship. [0003] In the "golden age" of the shipping market, a large number of ships were designed and built to meet the requirements of high-speed operation, and their speed can generally reach about 25 knots. However, under the influence of the general slowdown of global economic growth in recent years, the shipping market was once in a downturn. In order to maximize profits, shipping companies gene...

AI Technical Summary

Problems solved by technology

The size of the ship and the bulbous bow is huge, and the original ship may be damaged during the cutting and installation process, and the new bulbous bow and the original ship may not be closed accurately, etc., requiring a lot of repair and adjustment work, resulting in low efficiency

And because the shape and size of each ship is different, the general refitting method needs to redesign the refitting plan when refitting the bulbous bow of different ships, which has poor versatility and high cost

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