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A Calculation Method of Still Water Shear Force and Bending Moment of Ship

A calculation method and ship design technology, applied in calculation, special data processing applications, instruments, etc., to achieve the effects of fast calculation speed, improved calculation accuracy, and simple data format

Active Publication Date: 2017-12-29
DALIAN MARITIME UNIVERSITY +1
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  • Abstract
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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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  • A Calculation Method of Still Water Shear Force and Bending Moment of Ship
  • A Calculation Method of Still Water Shear Force and Bending Moment of Ship
  • A Calculation Method of Still Water Shear Force and Bending Moment of Ship

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Embodiment Construction

[0100] The present invention is described in further detail below in conjunction with accompanying drawing:

[0101] Figure 4 It is the overall flow chart for the calculation of ship still water shear force and bending moment, which mainly includes the following steps:

[0102] 1. Establish the STL model of the ship and all cabins. It can be obtained in the following two ways: (1) For ships with design data, the IGES model can be exported by ship design software (such as NAPA), and then converted into STL format by 3D modeling software (such as 3Dmax). (2) For ships without ship design data, it is necessary to use modeling tools to model the shell and cabin according to the data in the loading manual, such as the type value table, hydrostatic force value table, general arrangement plan, tank capacity diagram and tank capacity table. Perform 3D reconstruction. image 3 Shown is the STL model of the bulk carrier "SPRING COSMOS" hull and all compartments.

[0103] 2. Calcula...

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Abstract

The invention discloses a method for calculating shear force and bending moment of a ship in still water, which comprises the following steps: establishing a three-dimensional photolithography format model of the ship shell and all cabins, that is, an STL model; calculating the floating state of the ship under any loading state; and calculating the buoyancy of the ship Distribution curves, weight distribution curves, load distribution curves, shear force distribution curves and bending moment distribution curves. The invention calculates the floating state of the ship under any loading condition based on the STL model, can simultaneously calculate the heel and trim of the ship, makes up for the deficiency of only calculating the trim angle of the ship in the traditional method, and improves the calculation accuracy. The invention can calculate the buoyancy curve of the ship under any heel and trim based on the ship hull STL model. The invention proposes the concept of "weight distribution table" of the cabin, and only needs to interpolate the volume distribution between each rib position according to the loading height during calculation, which can not only improve the calculation accuracy but also ensure the calculation efficiency.

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" ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 刘春雷王麟孙霄峰施建华尹勇华玮东昉王军张东洋杨博金一丞唐稳张秀凤倪银钢刘秀文神和龙任鸿翔吴海波
Owner DALIAN MARITIME UNIVERSITY
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