Ice area reinforcing area dividing method for Arc ice-level bow-stern bidirectional icebreaker

Abstract

The invention discloses an ice area reinforcing area dividing method for an Arc ice-level bow and stern bidirectional icebreaker. The method comprises the following steps that an ice waterline, an icezone line, an edge flat line and a bottom flat line on a three-dimensional hull outer plate are unfolded in a two-dimensional mode and drawn on an outer plate unfolding drawing; an ice area reinforcing area of the icebreaker is sequentially divided into a bow area A, a bow area A1, a midship area B, a stern area A and a stern area A1 from the bow to the stern in the length direction of the icebreaker; the bow A1 area is divided into a plurality of reinforcing subareas; and the midship B area is divided into a plurality of reinforcing subareas by utilizing the ice belt lines, the edge flat lines and the bottom flat lines. The ice area reinforcing areas of the bow, the midship and the stern of the ship body are divided into a plurality of different ice load grades, the plate thickness of the reinforcing areas can be changed in a gradual change mode, and the ice load of the ice area better conforms to the actual stress characteristics of the ship during sailing in the polar sea area.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a method for dividing ice-strengthened regions of an Arc ice-class fore-stern two-way icebreaker. Background technique [0002] The Arc series ice class belongs to the registry notation related to ice strengthening adopted by the Russian Register of Shipping for ships sailing in polar regions. Ships sailing in polar regions for a long time often require a higher level of ice strengthening. The traditional ice strengthening division method is to divide the ice strengthening area of ​​the ship into the bow A area and the stern C area. This division method is applicable to Arc4, Arc5, Arc6 or some of the Finnish and Swedish ice area regulations. It is applicable to the ice class of middle and low-class ships in the North Baltic Sea, but with more and more ships sailing in the polar region, there is more and more demand for high-class ice strengthening. If high-ice class ships (...

AI Technical Summary

Problems solved by technology

The traditional ice strengthening division method is to divide the ice strengthening area of ​​the ship into the bow A area and the stern C area. This division method is applicable to Arc4, Arc5, Arc6 or some of the Finnish and Swedish ice area regulations. It is applicable to the ice class of middle and low-class ships in the North Baltic Sea, but with more and more ships sailing in the polar region, there is more and more demand for high-class ice strengthening. If high-ice class ships (such as Arc7, Arc8, Arc9) still use the traditional method of strengthening the ice area, so the thickness of the outer plating of the hull changes more prominently along the length of the ship, that is, the thickness of the outer plating of the stern will be much smaller than that of the outer plating of the bow , so for ships with high ice machines, their ice-strengthened structures are extremely unreasonable, and the ice loads in different regions vary greatly, and their hull structures are prone to damage when navigating in polar regions

[0003] At the same time, for high-ice-class ships, especially those that pay more attention to independent maneuverability in ice areas and need to have a certain independent

Images