Spherical axe type ship bow suitable for medium-high speed ship

Abstract

A spherical axe type ship bow suitable for a medium-high speed ship comprises a forward inclining stem and a forward protruding bulb nose-shaped bow body, wherein the bulb nose-shaped bow body is located under a designed waterline, and the horizontal length, protruding forward, of the bulb nose-shaped bow body becomes smaller gradually in the half-breadth direction from the two ends of the medium-high speed ship to the midline face of the medium-high speed ship; furthermore, on the midline face of the medium-high speed ship, the lower surface of the bulb nose-shaped bow body is connected with a vertical column above to form an axe-shaped bow, and the vertical column intersects with the designed waterline. By the adoption of the spherical axe type ship bow, during medium-high speed sailing of the ship, wave-making resistance can be effectively reduced, and splashing of the bow is avoided.

Description

technical field [0001] The invention relates to the technical field of bow structure, in particular to a ball-axe bow used on medium and high-speed ships. Background technique [0002] The research on the resistance performance of ships shows that the shape of the bow of the ship has a significant impact on the hull resistance, and also has a great influence on the ship's navigation state. Therefore, there are extensive studies on the design of bow shapes of different types and different speeds, which can be roughly divided into 6 categories , That is, vertical bow, inclined - vertical bow, inclined bow, bulbous bow, flying shear bow, ice-breaking bow. Among them, since the bulbous bow can effectively reduce the wave-making resistance of medium-speed transport ships, it can effectively reduce the bow bilge vortex when the low-speed fat transport ship is fully loaded and the wave-breaking resistance when sailing on ballast. At the same time, it can effectively use Therefore,...

AI Technical Summary

Problems solved by technology

For the structure of the bulbous bow, see figure 1 , generally includes a forward-sloping bow 1 and a bulbous bow 2. Along the width direction of the ship, the bulbous bow 2 is always protruding forward relative to the bottom of the bow 1. There is a downwardly inclined upper surface 21 between the root of the rear end of the nose-shaped bow 2 and its front end, and the upper surface 21 is in line with the design waterline L WL Intersect, there is a concave area with a large slope between the bulbous bow 2 and the stem 1 that protrude forward, see figure 2 , the molded lines of the water part between the bow 20 stations, 20.27 stations, 20.54 stations, and 20.81 stations are roughly linear cross-section molded lines. At this time, the bow will roll over to a certain extent, and even the bow will splash, which will cause unfavorable wave system interference between the wave generated by the bulbous bow and the hull wave, which will increase the navigation resistance and increase fuel consumption. The concept of green ship development

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