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Hull structure with excellent collision resistance and design method of hull structure

A design method and structure technology, applied in the direction of hull design, hull, hull deck, etc., can solve the problems of increased operating costs and reduced loading efficiency, and achieve excellent collision resistance and significant contribution

Active Publication Date: 2018-03-16
NIPPON STEEL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these countermeasures lead to an increase in construction costs, an increase in operating costs, and a decrease in loading efficiency

Method used

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  • Hull structure with excellent collision resistance and design method of hull structure
  • Hull structure with excellent collision resistance and design method of hull structure
  • Hull structure with excellent collision resistance and design method of hull structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] First, the effect when the present invention is applied to a double hull structure (double hull) is explained. in figure 1 In the components shown, it is assumed that the outer and inner plates, as well as the deflection prevention parts attached to the outer and inner plates, use the total extension specified in the Unified Requirement W11 of the International Association of Classification Societies (IACS) In the case of a steel plate with a total elongation of 1.5 times the value of the elongation, image 3 In the collision scenario shown, the damage of the inner panel is analyzed using FEM. The result is clear, such as Picture 11 As shown, the cracks and large breaches of the inner plate have not been developed.

Embodiment 2

[0101] Next, the effect when the present invention is applied to a single-layer hull structure (single-layer hull) will be described. The inventor assumes that the VLCC collided with a single-hull bulk carrier, and used FEM to obtain the deformation of the bulk carrier's components and the energy absorbed by the deformation.

[0102] In FEM analysis, such as image 3 As shown, it is assumed that a VLCC self-stopping bulk carrier (V A =0kt), the front side near the center of the hull is in a serious collision at 12kt at 90 degrees. Specifically, such as Picture 12 As shown, the bow of the VLCC was made to collide with the outer plate 20 of a bulk carrier with a single-layer hull structure, and the analysis was performed until 6 seconds after the collision. The collision position is assumed to be a more severe collision position relative to the breach of the outer panel. In addition, in Picture 12 , The starboard half of the bulk carrier is not shown.

[0103] Then, for the case ...

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Abstract

The hull structure has a hull structure in which a high ductility steel plate is used for part or all of one or more of the members of the outer or inner plates facing each other on the side of the ship. The high ductility steel plate is required to have an international The total elongation is 1.4 times or more the value of the total elongation specified in the unified standard (Unified Requirement W11Rev.8 2014) of the Association of Classification Societies (IACS) and was confirmed to satisfy the specification. Preferably, the high ductility steel plate is also used for a deflection preventer attached to the portion (outer plate, inner plate) where the steel plate is used.

Description

Technical field [0001] The present invention relates to a hull structure having excellent collision resistance, and a design method of the hull structure, which can suppress breakage of the hull in a large ship whose side part is collided. Background technique [0002] In bulk cargo ships such as ore carriers and coal carriers, a single-layer hull structure (single hull) is still used. The cargo from these ships will not pollute the ocean, but the ships still carry fuel, etc., and the outflow of fuel will cause marine pollution. Therefore, it is necessary to suppress cracks in the hull caused by collision accidents and the like. [0003] In addition, since the outflow of oil from oil tankers more obviously causes marine pollution, it has become an international problem. In recent years, in order to suppress the outflow of oil caused by collision accidents, etc., a double hull structure (double hull) has been gradually replaced. Compared with a single-layer hull, the double-layer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B43/18B63B3/16B63B3/20B63B3/34B63B3/48
CPCB63B3/16B63B3/20B63B3/34B63B3/48B63B43/18Y02T70/10
Inventor 市川和利稻见彰则白幡浩幸山田安平户泽秀桧垣幸人
Owner NIPPON STEEL CORP
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