Stabilisation system, in particular for a floating support, comprising multiple u-shaped damping devices

Patent metadata

Field	Value
Publication number	US-11267543-B2
Application number	US-201716081680-A
Country	US
Kind code	B2
Filing date	Feb 2, 2017
Priority date	Mar 2, 2016
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Stabilization system for a system subjected to external stresses, in particular for a floating support structure, the stabilization system comprising at least three damping devices (1), in form of U-shaped tubes, made up of liquid reserves (2) and a connecting tube (3). At least two of the damping devices are not parallel to one another. The invention further relates to a floating support structure comprising such a stabilization system.

First claim

The invention claimed is:

1. A floating support structure comprising a single floater and a stabilization system included in the single floater for damping wave excitations, the stabilization system comprising a plurality of damping devices, each damping device being substantially U-shaped and being made up of two liquid reserves and a connecting tube connecting the two liquid reserves at the lower part of the liquid reserves allowing free and dynamic circulation of the liquid between the liquid reserves, wherein the stabilization system comprises at least three damping devices, each damping device being not parallel to at least one other damping device, wherein the at least three damping devices comprise:
three damping devices forming a three-branch star shaped support structure in which each branch of the star shaped support structure is formed by a damping device, a center of the star being formed by three liquid reserves close to one another, the liquid reserves belonging to distinct damping devices and/or
three damping devices forming a triangular shaped support structure in which two neighboring liquid reserves belonging to two distinct damping devices are arranged at each vertex of the triangular shaped support structure.

2. The floating support structure as claimed in claim 1 , wherein a connecting tube of at least one damping device comprises means for restricting passage of the liquid.

3. The floating support structure as claimed in claim 1 , wherein the liquid reserves of at least one damping device comprise a gas in the upper parts thereof.

4. The floating support structure as claimed in claim 3 , wherein at least one damping device comprises a line allowing passage of the gas and connecting the two liquid reserves.

5. The floating support structure as claimed in claim 3 , wherein the line allowing passage of the gas is parallel to the connecting tube.

6. The floating support structure as claimed in claim 3 , wherein the line allowing passage of the gas comprises means for restricting passage of the gas.

7. The floating support structure as claimed in claim 3 , wherein at least one liquid reserve comprises a connection with a gas from the outside medium.

8. The floating support structure as claimed in claim 1 , wherein the liquid reserves have a substantially cylindrical shape.

9. An offshore energy production system comprising at least a wind turbine and the floating support structure as claimed in claim 1 .

10. The floating support structure as claimed in claim 1 , wherein three damping devices form a three-branch star shaped support structure in which each branch of the star shaped support structure is formed by a damping device, a center of the star being formed by three liquid reserves close to one another, the liquid reserves belonging to distinct damping devices.

11. The floating support structure as claimed in claim 1 , wherein three damping devices form a triangular shaped support structure in which two neighboring liquid reserves belonging to two distinct damping devices are arranged at each vertex of the triangular shaped support structure.

12. The floating support structure as claimed in claim 1 , wherein three damping devices form a triangular shaped support structure in which two neighboring liquid reserves belonging to two distinct damping devices are arranged at each vertex of the triangular shaped support structure, and three additional damping devices form a three-branch star shaped support structure inscribed in the triangular shaped support structure and in which each branch of the star shaped support structure is formed by a damping device, a center of the star being formed by three liquid reserves close to one another, the liquid reserves belonging to distinct damping devices.

Assignees

• Ifp Energies Now

Inventors

• Lepreux Olivier
• Coudurier Christophe

Classifications

• B63B2035/446

  for converting wind energy into electric energy · CPC title

• F03D13/25

  specially adapted for offshore installation · CPC title

• F16F15/023

  using fluid means · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• B63B35/44 Primary

  Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices {(construction methods for floating offshore platforms B63B75/00)} · CPC title