Manufacturing method of active separable bulbous bow

Abstract

Disclosed is a method for manufacturing an actively separable bulbous bow, which comprises the following steps: A. material selection: selecting a high-strength material; B. material shaping: processing the high-strength material into a matched size and shape according to the size and shape of a connecting part between the bulbous bow and a main hull; C. installation: installing the above-mentioned high-strength material at the connecting part between the bulbous bow and the main hull using a welding, bonding or embedding process for connecting the bulbous bow to the main hull; D. grinding treatment: grinding the above-mentioned connecting part to ensure that there is a smooth transitional connection between the bulbous bow and the main hull; E. rust prevention: adopting sandblasting and undercoating; and F. non-destructive watertight inspection: performing the non-destructive watertight inspection on the connecting part between the bulbous bow and the main hull. The high-strength material is a low-alloy and high-strength metal, with a yield strength value of not less than 390 Mpa, and using the bulbous bow can reduce the damage to the hull of an opposite ship caused by the bulbous bow during ship collision.

Description

technical field [0001] The invention relates to a manufacturing method of a ship component, in particular to a manufacturing method of an actively separated bulbous bow. Background technique [0002] The bulbous bow structure has unique benefits in reducing the wave-making resistance of high-speed ships and the visco-pressure resistance of low-speed ships. It has been adopted by a large number of ship designers for a long time, especially in the design of container ships. However, the bulbous bow is the protruding part of the bow of the ship, which protrudes very long. If it comes into contact with other ships during the voyage, it may be embedded in the other ship's hull, causing the cargo of the other ship to leak. For ships carrying dangerous goods such as oil tankers, chemical tankers, and nuclear fuel, if the cabin is broken, it will inevitably lead to leakage of dangerous goods, and such accidents often cause disastrous consequences. [0003] Conventional methods, in ...

AI Technical Summary

Problems solved by technology

[0005] On the one hand, since the stiffness of the bulbous bow is generally much greater than that of the side of the collided ship, by changing the structural form or size of the bulbous bow, its stiffness is smaller than that of the side of the collided ship, so as to realize the It is very difficult to implement the collision protection method for active deformation and damage of the nose bow

On the other hand, since the bulbous bow structure needs to bear complex wave loads, if only from the perspective of collision protection, simply reducing the strength of the bulbous bow structure will lead to a decrease in its ability to withstand conventional wave loads

In the third aspect, if the strength of the bulbous bow is reduced, the structure of the bulbous bow is prone to permanent plastic deformation under normal load conditions, which will affect the usability of the bulbous bow

[0009] 3. Due to the large fracture limit strain of ordinary low-carbon steel, after the structure of the bulbous bow end is damaged, the protruding structure of the bulbous bow still exists and will not be separated from the main hull, and subsequent damage will still be caused to the opposing ship during the collision

But this collision scenario is not realistic

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