Novel bulbous bow capable of reducing increase of resistance in waves

Abstract

The present invention discloses a novel bulbous bow capable of reducing the increase of resistance in waves and is suitable for ships in a variety of navigational conditions. The interior of the bulbous bow is of a hollow structure, and water diversion hole lines are symmetrically arranged on the both sides of the outer surface of the bulbous bow in the direction of a waterline. According to the novel bulbous bow capable of reducing the increase of resistance in waves, the resistance performance in the still water is basically unchanged under the condition of remarkably reducing the increase of resistance in waves. The novel bulbous bow capable of reducing the increase of resistance in waves can be applied to full-formed ships, such as oil tankers, bulk carriers and liquefied gas vessels, and can also be applied to relatively thin medium-speed ships, such as container ships.

Description

technical field [0001] The invention relates to the field of ship design, and relates to a shape structure of a bow of a ship, in particular to a new type of spherical bow which reduces the increase of resistance in waves. Background technique [0002] Due to the slowdown in global economic growth and the long-term downturn in the international shipping market, various shipping price indexes have continued to decline, and the profit margins of shipping companies have been greatly reduced. At the same time, in the face of the pressure of the EEDI (Energy Efficiency Design Index) rules of the International Maritime Organization, shipowners strongly hope to improve the comprehensive operational performance of new ships to reduce fuel consumption costs and meet the requirements of the new rules. [0003] When a ship sails in the ocean, it will move in six degrees of freedom under the action of waves. Among them, the surge, sway, and yaw motions have little effect on the combat ...

AI Technical Summary

Problems solved by technology

Among them, the surge, sway, and yaw motions have little effect on the combat and comfort of the ship due to the small motion range, while the roll and pitch motions may reach a large swing angle, which has great impact on the seaworthiness of the ship. , the accuracy of weapon attacks during combat, and the comfort of the crew's work and life all have a great impact. In severe cases, it may cause the ship to lose its combat capability, or even capsize due to swaying

All countries in the lateral movement have made in-depth research and put into use various anti-rolling devices and technologies, such as bilge keel, fin stabilizer and water tank, etc., which can be properly controlled or significantly reduced, such as bilge keel, anti-rolling tank, etc. Shaking fins can reduce rolling by 70% to 80% within a certain speed range, but for longitudinal movement, there are few measures that can be taken, and no effective anti-rolling device has been seen yet.

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