EP1826116B1 - Système d'amarrage pour une structure flottante - Google Patents

Système d'amarrage pour une structure flottante Download PDF

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Publication number
EP1826116B1
EP1826116B1 EP06122163A EP06122163A EP1826116B1 EP 1826116 B1 EP1826116 B1 EP 1826116B1 EP 06122163 A EP06122163 A EP 06122163A EP 06122163 A EP06122163 A EP 06122163A EP 1826116 B1 EP1826116 B1 EP 1826116B1
Authority
EP
European Patent Office
Prior art keywords
tank
mooring
liquid
pendulum members
damping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP06122163A
Other languages
German (de)
English (en)
Other versions
EP1826116A1 (fr
Inventor
Clemens Gerardus Johannes Maria Van Der Nat
Jelte Anne Willem Kymmell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bluewater Energy Services BV
Original Assignee
Bluewater Energy Services BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bluewater Energy Services BV filed Critical Bluewater Energy Services BV
Priority to EP06122163A priority Critical patent/EP1826116B1/fr
Priority to CN2006800532952A priority patent/CN101384474B/zh
Priority to RU2008137798/11A priority patent/RU2408493C2/ru
Priority to PCT/EP2006/070081 priority patent/WO2007096019A1/fr
Priority to MYPI20083253A priority patent/MY143554A/en
Publication of EP1826116A1 publication Critical patent/EP1826116A1/fr
Application granted granted Critical
Publication of EP1826116B1 publication Critical patent/EP1826116B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
    • B63B22/025—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids and comprising a restoring force in the mooring connection provided by means of weight, float or spring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
    • B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids

Definitions

  • the invention relates to a mooring system for a floating structure, such as vessel, comprising a mooring structure, such as a buoy, a further floating structure or a fixed tower, having a turntable rotatable around a vertical axis, and a connection structure adapted to provide a connection between the floating structure and the mooring structure, the connection structure comprising a rigid arm assembly and pendulum members, wherein the rigid arm assembly and pendulum members at one end are hingedly interconnected and at their other ends are adapted to be connected to the floating structure and the mooring structure respectively, wherein ballast weights are provided at the interconnected ends.
  • the ballast weights provide restoring forces to enable the floating structure to maintain a position window relative to the mooring structure.
  • the rigid arm assembly and pendulum members do not restrict the first order motions of the floating structure caused by the environmental conditions.
  • the interconnected ends of the rigid arm assembly and pendulum members with the ballast weights are free to swing perpendicular to the restoring force due to for example the roll motions of the floating structure.
  • the swinging motion of the pendulum members can become undesirably large when the pendulum is exited in or close to its natural frequency.
  • motion of the pendulum members involves motion of the other movable parts of the mooring system, i.e. the turntable and the rigid arm assembly.
  • the natural frequency of this moving system depends on the geometry and weight of all parts. When reference is made to natural or swinging frequency or motion of the pendulum members this should be understood as the natural or swinging frequency or motion of the complete moving system, comprising the pendulum members, rigid arms and turntable.
  • the object of the invention is to provide an improved mooring system of the above-mentioned type, wherein damping of the motion of the pendulum members is obtained in an efficient manner.
  • the mooring system is characterized by a damping system for damping the swinging motion of the pendulum members, the damping system comprising at least one liquid tank containing a liquid and being located in the mooring system at a distance from the vertical axis, wherein the liquid tank has such dimensions that at a swinging motion of the pendulum members the liquid is adapted to move in the liquid tank to provide damping forces counteracting the swinging motion of the pendulum members.
  • Fig. 1 schematically shows an embodiment of the mooring system according to the invention.
  • Fig. 2 schematically shows a top view of the mooring system of Fig. 1 .
  • Fig. 3 is a cross section of the lower end of one pendulum member with a ballast weight and liquid tank of the mooring system of Fig. 1 .
  • Figs. 1 and 2 show an embodiment of a mooring system for a floating structure 1, such as a vessel, which comprises a mooring structure 2, which in this embodiment is made as a fixed tower anchored to the sea bed.
  • the mooring structure can also be made as a buoy or a further floating structure.
  • This further floating structure can be for example a vessel keeping position by means of a further mooring system or for example a dynamic positioning system.
  • the tower 2 is provided with a turntable 3 rotatably supported on the tower 2 around a vertical axis 4.
  • the mooring structure further comprises a connection structure 5 adapted to provide a connection between the floating structure 1 and the tower 2.
  • the connection structure 5 comprises two rigid arms made as triangular yokes 6. At one end the yokes 6 each are connected to the turntable 3 by hinges 7. At the opposite end each yoke 6 is connected to a ballast weight 8.
  • connection structure 5 further comprise two pendulum members 9 each connected by a hinge assembly (not shown) to support arms 11 mounted on the floating structure 1. At their lower ends the pendulum members 9 are connected by hinge assemblies 12 to the ballast weight 8, thereby providing an interconnection between the ends of the pendulum members 9 and the yokes 6.
  • the hinge assemblies at the upper and lower ends of the pendulum members 9 provide two perpendicular hinge axes allowing movement of these pendulum members in all directions.
  • each ballast weight 8 includes a tank 13 containing a liquid, for example seawater, as schematically shown in Fig. 3 .
  • the dimensions of the tank 13 and the amount of liquid are chosen such that the liquid is adapted to move in the tank 13 due to the swinging motion of the pendulum members 9. This results in a liquid wave 14 or travelling water bullet providing slamming impact and inertia forces creating a tank reaction force that is counteracting the swinging motion of the pendulum members 9 thereby causing damping of the swinging motion of the pendulum members 9.
  • the damping characteristics of the tank 13 can be adjusted by adjusting the amount of liquid, i.e. the height of the liquid in the tank.
  • the inner dimensions of the tank can be made adjustable, for example by varying the effective length of the tank.
  • the length dimension of the tanks 13 is tangential to the radius to the rotation axis 4 of the turntable 3. This results in an efficient damping operation.
  • the amount of damping can be adjusted.
  • the dynamic behaviour of the tanks can be adjusted by the amount of liquid in the tank.
  • the tanks 13 are located at the interconnected ends of the yokes 6 and the pendulum members 9 in the embodiment shown, the location of the tanks can be freely chosen on the yoke, pendulum members or turntable.
  • the tanks 13 can be located at any location in the mooring system at a distance from the vertical axis 4.
  • the tank reaction forces are most effective in damping the mooring system when the restoring forces generate the largest restoring moment around the rotation axis 4 of the turntable 3.
  • it is preferred for effective damping to have the length dimension of the tanks oriented perpendicular to the radius towards the rotation axis 4. It is possible to use different tanks with different lengths and liquid heights.
  • the swinging motion period can vary from 6-16 seconds, depending on the pendulum member lengths and the instantaneous pendulum member inclination relative to the vertical. It is noted that the inertia of the rotating turntable 3 has a natural period increasing effect on the swinging period of the pendulum members 9. The natural period will become shorter as the floating structure moves away from or towards the mooring structure due to the inclination of the pendulum members in the plane perpendicular to the swinging motion. Highest efficiency is therefore obtained when damping optimum of the anti-yaw tanks is around 85% - 95% of the natural period as found with vertical pendulums.
  • the tank motion amplitude is of importance which will require a longer tank length with increasing motion amplitude.
  • the tank natural frequency ceases to exist since the flow regime is such that the water behaves more like a "liquid bullet" than as a standing wave or water bore for which a tank frequency can be theoretically determined.
  • the following empirical relations have been established based upon test results. These relations however do not limit the dimensions of the tank.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Bridges Or Land Bridges (AREA)
  • Tents Or Canopies (AREA)
  • Joining Of Building Structures In Genera (AREA)

Claims (6)

  1. Système d'amarrage pour une structure flottante, telle qu'un vaisseau, comprenant une structure d'amarrage, telle qu'une bouée, une autre structure flottante ou une tour fixe, présentant une plaque tournante pouvant tourner autour d'un axe vertical, et une structure de connexion adaptée pour fournir une connexion entre la structure flottante et la structure d'amarrage, la structure de connexion comprenant un ensemble de bras rigide et des éléments pendulaires, dans lequel l'ensemble de bras rigide et les éléments pendulaires à une extrémité sont interconnectés de manière articulée et à leurs autres extrémités sont adaptés pour être connectés à la structure flottante et à la structure d'amarrage respectivement, dans lequel des lests sont prévus aux extrémités interconnectées, caractérisé par un système d'amortissement destiné à amortir le mouvement oscillant des éléments pendulaires, le système d'amortissement comprenant au moins un réservoir de liquide contenant un liquide et étant positionné dans le système d'amarrage à distance de l'axe vertical, dans lequel le réservoir de liquide présente de telles dimensions qu'au niveau d'un mouvement oscillant des éléments pendulaires le liquide est adapté pour se déplacer dans le réservoir de liquide pour fournir des forces d'amortissement contrecarrant le mouvement oscillant des éléments de pendule.
  2. Système d'amarrage selon la revendication 1, dans lequel au moins un réservoir de liquide est prévu aux extrémités interconnectées de l'ensemble de bras rigide et des éléments pendulaires.
  3. Système d'amarrage selon la revendication 1 ou 2, dans lequel les dimensions internes du réservoir et/ou la quantité de liquide est/sont réglables pour régler les caractéristiques d'amortissement du réservoir.
  4. Système d'amarrage selon la revendication 1, 2 ou 3, dans lequel la dimension longitudinale du réservoir est tangentielle à l'axe de rotation de la plaque tournante.
  5. Système d'amarrage selon l'une quelconque des revendications précédentes, dans lequel les dimensions du réservoir satisfont sensiblement les équations de la page 5, ligne 36 - page 6, ligne 14.
  6. Système d'amortissement pour un système d'amarrage selon l'une quelconque des revendications précédentes, comprenant au moins un réservoir de liquide présentant des dimensions telles que le liquide est adapté pour se déplacer dans le réservoir de liquide pour fournir des forces d'amortissement contrecarrant le mouvement oscillant des éléments pendulaires.
EP06122163A 2006-02-23 2006-10-12 Système d'amarrage pour une structure flottante Active EP1826116B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP06122163A EP1826116B1 (fr) 2006-02-23 2006-10-12 Système d'amarrage pour une structure flottante
CN2006800532952A CN101384474B (zh) 2006-02-23 2006-12-21 用于浮动结构的系泊系统
RU2008137798/11A RU2408493C2 (ru) 2006-02-23 2006-12-21 Причальная система для плавучей конструкции
PCT/EP2006/070081 WO2007096019A1 (fr) 2006-02-23 2006-12-21 Système d'amarrage pour une structure flottante
MYPI20083253A MY143554A (en) 2006-02-23 2006-12-22 Mooring system for a floating structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06110343 2006-02-23
EP06122163A EP1826116B1 (fr) 2006-02-23 2006-10-12 Système d'amarrage pour une structure flottante

Publications (2)

Publication Number Publication Date
EP1826116A1 EP1826116A1 (fr) 2007-08-29
EP1826116B1 true EP1826116B1 (fr) 2008-05-14

Family

ID=36676718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06122163A Active EP1826116B1 (fr) 2006-02-23 2006-10-12 Système d'amarrage pour une structure flottante

Country Status (10)

Country Link
EP (1) EP1826116B1 (fr)
CN (1) CN101384474B (fr)
AT (1) ATE395248T1 (fr)
DE (1) DE602006001197D1 (fr)
DK (1) DK1826116T3 (fr)
ES (1) ES2308671T3 (fr)
MY (1) MY143554A (fr)
PT (1) PT1826116E (fr)
RU (1) RU2408493C2 (fr)
WO (1) WO2007096019A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2070812A1 (fr) * 2007-12-10 2009-06-17 Bluewater Energy Services B.V. Ensemble d'amarrage
US8561563B2 (en) 2008-10-09 2013-10-22 Keppel Offshore & Marine Technology Centre Pte Ltd Side-by-side mooring bay
WO2011059918A1 (fr) * 2009-11-12 2011-05-19 Shell Oil Company Plateforme de type spar assistée par navire annexe
EP2683604B1 (fr) 2011-03-11 2016-11-23 Single Buoy Moorings, Inc. Système d'amortissement de fourche
WO2015041916A1 (fr) * 2013-09-18 2015-03-26 Shell Oil Company Systèmes de déchargement et d'amarrage en tandem et en position côte à côte, et procédés associés
CN105539731B (zh) * 2016-01-07 2017-07-14 北京天诚同创电气有限公司 船舶靠泊系统
CN105818930B (zh) * 2016-03-11 2017-12-05 大连理工大学 一种改进的阻尼式软刚臂单点系泊装置
CN107576479B (zh) * 2017-09-30 2023-06-06 中国船舶重工集团公司第七一九研究所 海洋核动力平台单点系泊系统试车设备及其调试方法
NO346077B1 (en) 2018-09-05 2022-02-07 Apl Norway As An energy absorption arrangement for reducing peak mooring loads
US11279446B2 (en) 2019-04-05 2022-03-22 Sofec, Inc. Disconnectable tower yoke mooring system and methods for using same
WO2020206249A1 (fr) 2019-04-05 2020-10-08 Sofec, Inc. Système d'amarrage de fourche à une tour séparable et procédés d'utilisation associés
CN110203332A (zh) * 2019-06-12 2019-09-06 贺绍喜 一种自适应的软钢臂系泊系统
WO2021034828A1 (fr) * 2019-08-19 2021-02-25 Sofec, Inc. Systèmes d'amarrage et leurs processus d'utilisation
US11560203B2 (en) 2019-11-08 2023-01-24 Sofec, Inc. Surge damping systems and processes for using same
EP4054927A1 (fr) 2019-11-08 2022-09-14 SOFEC, Inc. Structures de support d'amarrage, systèmes pour des navires d'amarrage et leurs procédés d'utilisation
CN111942537A (zh) * 2020-07-02 2020-11-17 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) 一种用于船舶的横摇运动抑制装置

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Publication number Priority date Publication date Assignee Title
US4669412A (en) * 1981-02-10 1987-06-02 Amtel, Inc. Boom for single point mooring system
EP0105976A1 (fr) * 1982-10-15 1984-04-25 Bluewater Terminal Systems N.V. Structure d'amarrage à un seul point comprenant un bras rigide
CA1227380A (fr) * 1984-02-13 1987-09-29 Frank Faller Compensateur de tangage et de roulis pour installation flottante d'extraction
FR2579558B1 (fr) * 1985-03-27 1987-05-29 Services Equipements Organe pour l'accouplement et le desaccouplement frequents d'un navire a une structure d'amarrage, et dispositif d'amarrage comportant de tels organes
EP1283159A1 (fr) * 2001-08-06 2003-02-12 Single Buoy Moorings Inc. Système de transfert pour hydrocarbures
CA2494181C (fr) * 2002-08-06 2008-10-14 Fmc Technologies, Inc. Systeme d'amarrage a bras de type duplex
CN2649476Y (zh) * 2003-08-20 2004-10-20 洛阳北方企业集团有限公司 一种带防止摩托车侧倾的轴传动发动机装置

Also Published As

Publication number Publication date
DE602006001197D1 (de) 2008-06-26
MY143554A (en) 2011-05-31
DK1826116T3 (da) 2008-09-08
WO2007096019A1 (fr) 2007-08-30
CN101384474A (zh) 2009-03-11
EP1826116A1 (fr) 2007-08-29
ATE395248T1 (de) 2008-05-15
PT1826116E (pt) 2008-07-31
ES2308671T3 (es) 2008-12-01
RU2008137798A (ru) 2010-03-27
RU2408493C2 (ru) 2011-01-10
CN101384474B (zh) 2011-11-23

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