Ship still water shearing force and bending moment calculating method

Abstract

The present invention discloses a ship still water shearing force and bending moment calculating method which comprises the following steps of: establishing three-dimensional photoetching format models of a ship housing and all compartments, i.e. STL models; calculating a floating state of a ship in a random loading state; and calculating a buoyancy distribution curve, a weight distribution curve, a load distribution curve, a shearing force distribution curve and a bending moment distribution curve of the ship. According to the present invention, the floating state of the ship under the random loading condition is calculated on the basis of the STL models; transverse inclination and longitudinal inclination of the ship can be simultaneously calculated; the defect of only calculating a longitudinal inclination angle of the ship in a conventional method is overcome; and calculation accuracy is improved. According to the present invention, on the basis of the ship housing STL model, the buoyancy curves of the ship under the random transverse inclination and longitudinal inclination can be calculated. According to the present invention, the concept of a weight distribution table of the compartments is disclosed and in the calculating process, volume distribution among frames only needs to be interpolated according to a loading height, and not only calculation accuracy can be improved, but also calculation efficiency can be ensured.

Description

technical field [0001] The invention belongs to the field of calculation of ship strength loaded with computer core technology, in particular to a calculation method for still water shear force and bending moment of a ship. Background technique [0002] Calculating the still water shear force and bending moment of ships with large deck openings such as bulk carriers and container ships is a mandatory requirement of the SOLAS Convention. The SOLAS convention and the International Association of Classification Societies (IACS) require that all bulk carriers with a length of 150 m and above and ships with large openings on deck defined by classification society rules should be equipped with loading computer software, and the loading computer must accurately calculate the The static water shear force and static water bending moment values ​​under different loading conditions. The China Classification Society's "Code for Classification and Construction of Sea-going Steel Ships" ...

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Problems solved by technology

[0032] 3) When calculating the gravity curve, the "trapezoidal distribution method" is used to calculate the variable weight distribution. For relatively regular cabins, the error is small, but for irregular cabins such as cargo holds with grooved bulkheads and cabins at the bow and stern, there will be large error

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