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Rolling reduction apparatus of floating structure

a floating structure and rolling motion technology, applied in the direction of vessel movement reduction by foils, special-purpose vessels, transportation and packaging, etc., can solve the problem of undesirable rolling motion of floating structures, and achieve the effect of reducing the rolling motion

Inactive Publication Date: 2013-04-25
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a way to stop the floating structure from rolling too much. It also helps to stop the rolling motion based on the situation.

Problems solved by technology

The swing motion of the floating structure is not desirable for the work on the floating structure.

Method used

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  • Rolling reduction apparatus of floating structure
  • Rolling reduction apparatus of floating structure
  • Rolling reduction apparatus of floating structure

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Embodiment Construction

[0024]Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. FIGS. 1 and 2 show a floating structure according to a first embodiment of the present invention. FIG. 1 is a perspective view of the floating structure, and FIG. 2 is a front view when the floating structure is viewed from a bow side. A floating structure main body 1 has a box shape in which a longitudinal direction is a direction of a ship length from a bow 3 to a stern 2, in a typical example. In FIG. 1, the longitudinal direction is drawn as a Y-axis. In the floating structure, a swing motion in a roll direction which is a turn motion around the Y-axis is required to be reduced.

[0025]A rolling reduction apparatus is attached to both ends of the floating structure main body 1 in a width direction, namely, an X-axis direction orthogonal to the longitudinal direction within a horizontal plane. The rolling reduction apparatus contains a pair of slender plate-s...

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PUM

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Abstract

A rolling reduction apparatus includes a pair of plate members attached to both ends in a width direction on a bottom of a floating structure. Each of the plate members has a plurality of through-holes arranged in a longitudinal direction of the floating structure. The rolling motion of the floating structure is reduced because eddies are formed to consume energy when water passes through the through-holes.

Description

TECHNICAL FIELD[0001]The present invention relates to an apparatus for reducing a rolling motion of a floating structure.BACKGROUND ART[0002]A technique for mooring a floating structure on water and using the floating structure for various use applications is put to practical use or researched. For example, in a plant referred to as FLNG (Floating LNG) or FPSO (Floating Production Storage & Offloading unit), a floating structure is floated offshore, and natural gas collected from an undersea gas field is liquidized to produce and accumulate LNG (Liquified Natural Gas). The accumulated LNG is transferred to a seaport by an LNG ship.[0003]For example, the floating structure is swung by waves generated on the water surface on the ocean. The swing motion of the floating structure is not desirable for the work on the floating structure. For example, in a case of the FLNG, a technique for suppressing the swing operation of the floating structure is required in order to improve an operatio...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B63B39/06
CPCB63B2035/448B63B39/06B63B2039/067B63B35/44
Inventor ANDO, YOSHITO
Owner MITSUBISHI HEAVY IND LTD