Final subdivision method in loading instrument of bulk carrier

Abstract

The present invention discloses a final subdivision method of a loading instrument of a bulk carrier. The method comprises the following steps: inputting initial data into the loading instrument; determining an objective function, a design variable and a constraint condition of final compartment according to floating state equations; using a differential evolutionary algorithm to resolve and optimize the objective function; using the differential evolutionary algorithm to perform operations of variating, crossing and selecting; and and traversing an individual set that meets the condition and outputting a result. In the present invention, as values of xF, TPC and MTC are not used to perform calculation, and instead floating state equilibrium equations are used to set the objective function and the constraint condition; and the differential evolutionary algorithm is used to perform calculation, thereby giving a more precise result and effectively reducing errors. According to the final subdivision method of a loading instrument of a bulk carrier disclosed by the present invention, not only can a small amount of goods be used to adjust a mean draft and a trim of a vessel, but also a large number of goods can be used to adjust the mean draft and the trim; and adjustment ranges of the mean draft and the trim are wide. According to the method disclosed by the present invention, as related data needs not to be manually inquired and manually input, the manpower can be effectively reduced, and the convenience is improved.

Description

technical field [0001] The invention relates to a bulk carrier loading instrument, in particular to a method for final cabin division in the bulk carrier loading instrument. Background technique [0002] In the process of cargo loading, transportation and unloading of bulk carriers, it is an important task to ensure the safety of ships and cargo. There are many factors that lead to the unsafety of bulk carriers, among which unreasonable stowage is an important reason. In order to ensure the safety of bulk carrier transportation, IMO (International Maritime Organization) stipulates that since July 1, 1998, all newly built and existing bulk carriers with a total length of more than 150m and those defined by classification society regulations Large opening deck ships must be equipped with a loading instrument, which should be able to provide the specified shear force and bending moment data of the hull. [0003] With the development of shipping, bulk carriers tend to be large...

AI Technical Summary

Problems solved by technology

[0024] 1. The calculation principles of the "loading 100t draft method" and the "pitch moment method" are the same, and there are the following assumptions: the longitudinal coordinate x F , The trim moment MTC per centimeter and the tonnage TPC of the displacement change caused by the parallel floating or sinking of the ship by 1cm remain unchanged, so the results are only approximate values, especially when the ship’s draft changes greatly, there will be a large error

[0025] 2. Using the "loading 100t draft method" and "trim moment method" for calculation is only suitable for using a small amount of cargo to adjust the average draft and trim of the ship, and the adjustment range of the average draft and trim is relatively small

[0026] 3. It is very inconvenient to manually query and manually input relevant data according to the ship's "loading 100t fore and aft draft change table" and "ship hydrostatic table"

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