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Ship section inertia moment calculation method based on three-dimensional model

A technology of three-dimensional model and calculation method, applied in the direction of calculation, design optimization/simulation, special data processing application, etc., can solve practical troubles and other problems, and achieve the effect of leap in accuracy

Inactive Publication Date: 2018-10-12
CHINA SHIP DEV & DESIGN CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to obtain the moment of inertia of the section of the ship hull conveniently and accurately, many designers use "CAXA", "AutoCAD" and other calculation aids or methods to calculate the moment of inertia, but these methods must redraw the section shape required for calculation, It is still troublesome to use

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  • Ship section inertia moment calculation method based on three-dimensional model
  • Ship section inertia moment calculation method based on three-dimensional model
  • Ship section inertia moment calculation method based on three-dimensional model

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Embodiment Construction

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] In this embodiment, a certain fishery resources and environmental scientific survey ship is taken as an example, and its main parameters are as follows:

[0034]

[0035] Use the inventive method to calculate the concrete steps of this ship hull section moment of inertia as follows:

[0036] S1. Establish a Boolean combined overall model of the hull structure:

[0037] Use CATIA software to call out the 3D model of the whole ship structure, and perform batch Boolean merger of the hull structure models to form the overall model of the "Boolean hull structure model", as shown in figure 1 shown.

[0038] The "hull structure design model" includes the solid model of the whole ship structure, including cabin plat...

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Abstract

The invention relates to a ship section inertia moment calculation method based on a three-dimensional model. According to the method, first, bulk Boolean merging is performed on the three-dimensionalmodel of a whole ship structure to form an overall model, then an inertia moment representation model of a specific rib position is constructed through a cutting model, and finally required data is extracted to solve the inertia moment of a cross section. Through the method, the existing three-dimensional model is utilized, manual statistical calculation is not needed, and section shape re-drawing in other software is not needed either; based on the existing ship structural design model being a data source, calculation is completely consistent with the design model, and inertia moment information of any section can be precisely reflected; and by the adoption of the bulk Boolean merging technology, hundreds of structural part models of section positions are merged into one object for processing, the cut thin-body model is utilized to serve as the ship section representation model for calculation, statistical omission does not exist, and a qualitative leap is achieved in precision compared with manual calculation in the past.

Description

technical field [0001] The invention relates to the technical field of ship structure design, in particular to a method for calculating the moment of inertia of a hull section based on a three-dimensional model. Background technique [0002] The calculation of the longitudinal strength of the hull is an important work item to ensure the safety of the ship. Calculating the section information of the ship's cross section in the process of calculating the longitudinal strength is an important sub-item of its work. It specifically includes the cross-sectional area A of the axial tension and compression, the polar moment of inertia IP and the torsional section coefficient WP when the circular shaft is twisted, the moment of inertia Ix, Iy and the bending section coefficient Wx, Wy of the neutral axis during bending, and the transverse The centroid of the section, etc. These parameters are related to the strength and stiffness of the member. [0003] In the past, when calculati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 周亮刘义军凌昊万鹏肖伟
Owner CHINA SHIP DEV & DESIGN CENT
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