US3349743A - Ship stabilizer - Google Patents

Ship stabilizer Download PDF

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Publication number
US3349743A
US3349743A US482059A US48205965A US3349743A US 3349743 A US3349743 A US 3349743A US 482059 A US482059 A US 482059A US 48205965 A US48205965 A US 48205965A US 3349743 A US3349743 A US 3349743A
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US
United States
Prior art keywords
tank
wing
liquid
main deck
hull
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.)
Expired - Lifetime
Application number
US482059A
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English (en)
Inventor
Sheldon B Field
Thomas F Bridges
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.)
John J Mcmullen Associates Inc
Original Assignee
John J Mcmullen Associates Inc
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 John J Mcmullen Associates Inc filed Critical John J Mcmullen Associates Inc
Priority to US482059A priority Critical patent/US3349743A/en
Priority to NO00164331A priority patent/NO127290B/no
Priority to IL26362A priority patent/IL26362A/en
Priority to GB37536/66A priority patent/GB1105715A/en
Priority to DEM70673A priority patent/DE1295405B/de
Priority to BE685830D priority patent/BE685830A/xx
Priority to FI662185A priority patent/FI46043C/sv
Priority to ES0330542A priority patent/ES330542A1/es
Priority to NL6611894A priority patent/NL6611894A/xx
Priority to JP41055287A priority patent/JPS4824878B1/ja
Application granted granted Critical
Publication of US3349743A publication Critical patent/US3349743A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • 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

  • SHIP STABILIZER Filed Aug. 24, 1965 5 Sheets-Sheet 5 nimm ATTORNEYS United States Patent O 3,349,743 SHIP STABILIZER Sheldon B. Field, -Floral Park, and Thomas F. Bridges,
  • ABSTRACT F THE DISCLOSURE A bulk carrier vessel having a passive free surface tank stabilizer formed by the existing ship structure and comprising a pair of wing tanks located just beneath the main deck along the upper outboard sides of the hull and being elongated in the longitudinal direction and each having an ⁇ inboard side formed by a downward and outward extending plate which serves to house tank liquid and reinforce the main deck.
  • a perforated bulkhead is provided in each wing tank and arranged in the athwartship direction to minimize the fore and aft swash of the tank liquid.
  • Existing girder plates project upward and outward from a bottom plate mounted on top of a corrugated bulkhead to transmit supporting forces to the main deck and serve as an interconnecting channel with a truncated prole for the wing tanks.
  • the wing tank fore and aft dimension is greater than the channel so as to form a C-shaped tank.
  • An aperture plate is secured to the boundary of the channel and wing tank and slopes downward and outward from the top of the tank and provides hydrodynamic damping for the liquid lbody which partially fills the tank.
  • the present invention provides a ship stabilizer and more particularly a stabilizer made mostly of existing ship structure such as the deck and supporting girder plates conventionally found in bulk cargo ships and the like.
  • FIG. 1 is a side elevation of a vessel schematically illustrating the positions of the stabilizer tanks in relation to the holes, corrugated transverse bulkheads, and deck;
  • FIG. 2 is a side sectional view taken along line 2--2 of FIG. 1;
  • FIG. 3 is a side sectional view taken along line 3-34 of FIG. l;
  • FIG. 4 is a developed fragmentary view of the restricting plate taken along line 4 4 of FIG. 2;
  • FIG. 5 is a sectional elevation view taken along line 5-5 of FIG. 3;
  • FIG. 6 is a sectional elevation view of the Wing tank taken along line 6 6 of FIG. 5.
  • FIG. l a conventional bulk carrying cargo ship, generally indicated as 10, having a plurality of longitudinally spaced holds 12 separated by corrugated transverse bulkheads 14 and provided with a main or upper deck 16.
  • a suitable number of longitudinal bulkheads 18 extend substantially throughout the length of the ship and divide holds 12 into a number of lateral compartments.
  • Each hold 12 has one or more hatchways 20 through which bulk cargo material is loaded and unloaded.
  • Sloping, elongated girder plates 22 are positioned across the hull, and each has one edge in supporting engagement with the underside of main deck 16 and its other edge rigidly mounted to the top of corrugated transverse bulkheads 14.
  • any suitable manner such as welding and the like, can be used to secure these edges to deck 16 and the supporting struc,- ture.
  • the girder plates 22 and their associated deck portion form in cross section a rigid triangular structure, better seen in FIG. 5.
  • An elongated narrow plate 24 is mounted atop each corrugated bulkhead 14 and serves as a -base or bottom to which the lower sides of plates 22 are secured.
  • a pair of wing tanks 30 are' built in next to the hull just below deck 16 and serve as part of the stabilization system in cooperation with selected pairs of the girder plates 22. Thesegirder plates form the sides of the crossover channel between wing tanks 30 as further described below.
  • each wing tank 30 has two liquid-tight bulkheads 32 and a sloping bottom plate 34 which has a vertical leg 36 and a horizontal leg 38 welded to deck 16 and the hull, respectively.
  • a vertically mounted transverse web 40 is mounted in each wing tank with its edges entirely in contact with plate 34, a portion of the hull, and a portion of the main deck 16. Web 40 serves to add additional transverse rigidity to the ship.
  • the portion of plate 34 mounted across the area at which the space between girder plates 22 communicates with the respective wing tank 30 serves as a sloping restriction plate 42.
  • a plurality of restrictions or cuts 44 is provided therein and these openings decrease in dimension and cross section as they approach the bottom of plate 42 so as to interfere as little as possible with the force distribution within plate 42.
  • Plate 42 terminates in an upper vertical leg 46, the top of which is welded or otherwise secured to the underside of main deck 16, and openings 48 are provided therein to reduce weight and to enable a free passage of air in a manner described below.
  • a swash bulkhead 50 is provided in each wing tank, preferably near the center thereof in order to prevent local sway and to eliminate unwanted turbulence from the wing tank.
  • sloping deck girders 22 function in their normal manner to give the required structural support to main deck 16, and that the space between girders 22 provides a connecting channel between the pair of transversely aligned wing tanks 30 located at opposite sides of the hull. Additional structural support and rigidity is afforded by transverse webs 40 and liquid-tight bulkheads 32.
  • girders 22 and bulkheads 32, along with bottom plates 34, main deck 16 and the hull of vessel 10 define an elongated, enclosed liquid container or tank which, when filled with a body of liquid, serves as the passive stabilization system for vessel 10.
  • Restriction plates 42 provide the appropriate energy dissipation and liquid damping as the liquid transfers therethrough.
  • any suitable liquid such as fuel, bunker oil, sea water and the like can be used as the stabilizing medium within the stabilizer.
  • the natural frequency of liquid oscillation within the stabilizer can be selected to match the particular conditions of the ship and sea by merely adjusting the height of the liquid within the stabilizer.
  • a predetermined plurality of stabilizers are built in into the vessel and can be partially filled with liquid to operate in the marmer described.
  • plan profile of the container is shown as being C-shaped (see FIG. 3), plan container profiles of Z-shape and H- shape are also within the scope of the present invention.
  • a bulk carrier vessel having a main deck and a hull and a passive stabilizer tank extending across said hull, comprising a pair of wing tanks each located beneath said main deck at an upper outboard side of the hull and having its inboard bottom wall formed by a downward and outward sloping plate having its top secured to the main deck under surface and its outboard edge secured to the respective hull side, said tank further including an interconnecting channel formed -by a bottom plate extending the length of the tank, a pair of girder plates projecting upward and fore and aft respectively from said bottom plate and having their top edges secured to the under surface of said main deck so as to transmit supporting forces thereto, said girder plates extending athwartship and intersecting the inboard walls of the wing tank so that the interconnecting channel has a truncated profile in cross section, the fore and aft dimension of the interconnecting channel being less than the fore and aft dimensions of said wing tanks so as to form a C-shaped tank
  • each wing tank comprise an inboard vertical section connected to the main deck and an outboard horizontal section connected to the hull.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Vibration Prevention Devices (AREA)
  • Sealing Devices (AREA)
US482059A 1965-08-24 1965-08-24 Ship stabilizer Expired - Lifetime US3349743A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US482059A US3349743A (en) 1965-08-24 1965-08-24 Ship stabilizer
NO00164331A NO127290B (sv) 1965-08-24 1966-08-17
IL26362A IL26362A (en) 1965-08-24 1966-08-21 Ship stabilizer
DEM70673A DE1295405B (de) 1965-08-24 1966-08-22 Passive Tankstabilierungsanlage fuer Schiffe
GB37536/66A GB1105715A (en) 1965-08-24 1966-08-22 Ship stabilizer
BE685830D BE685830A (sv) 1965-08-24 1966-08-22
FI662185A FI46043C (sv) 1965-08-24 1966-08-23 Passiv stabiliseringsanordning för fartyg.
ES0330542A ES330542A1 (es) 1965-08-24 1966-08-24 Perfeccionamientos en estabilizadores de barcos.
NL6611894A NL6611894A (sv) 1965-08-24 1966-08-24
JP41055287A JPS4824878B1 (sv) 1965-08-24 1966-08-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US482059A US3349743A (en) 1965-08-24 1965-08-24 Ship stabilizer

Publications (1)

Publication Number Publication Date
US3349743A true US3349743A (en) 1967-10-31

Family

ID=23914480

Family Applications (1)

Application Number Title Priority Date Filing Date
US482059A Expired - Lifetime US3349743A (en) 1965-08-24 1965-08-24 Ship stabilizer

Country Status (10)

Country Link
US (1) US3349743A (sv)
JP (1) JPS4824878B1 (sv)
BE (1) BE685830A (sv)
DE (1) DE1295405B (sv)
ES (1) ES330542A1 (sv)
FI (1) FI46043C (sv)
GB (1) GB1105715A (sv)
IL (1) IL26362A (sv)
NL (1) NL6611894A (sv)
NO (1) NO127290B (sv)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513797A (en) * 1968-08-21 1970-05-26 Litton Systems Inc Energy-absorbing beach for ship's wells and tanks
US4228754A (en) * 1978-03-13 1980-10-21 Sumitomo Electric Industries, Ltd. Oil/water storage tank having flexible partition membrane and chamfered internal edges and corners
US4232623A (en) * 1977-11-25 1980-11-11 Brown & Root, Inc. Apparatus to reduce vessel motions

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5330540Y2 (sv) * 1973-04-04 1978-07-29

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US932722A (en) * 1908-04-13 1909-08-31 Fore River Ship Building Company Ballast-tank for ships.
US986861A (en) * 1911-01-26 1911-03-14 John Reid Ship construction.
US3054373A (en) * 1960-02-16 1962-09-18 Mcmullen Ass John J Flume type heeling tank stabilizer
US3228368A (en) * 1963-12-24 1966-01-11 Newport News S & D Co Ship structure and control means therefor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1023477A (en) * 1911-07-19 1912-04-16 Joseph R Oldham Ship construction.
DE652792C (de) * 1936-04-01 1937-11-08 Siemens App Schiffsstabilisierungsanlage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US932722A (en) * 1908-04-13 1909-08-31 Fore River Ship Building Company Ballast-tank for ships.
US986861A (en) * 1911-01-26 1911-03-14 John Reid Ship construction.
US3054373A (en) * 1960-02-16 1962-09-18 Mcmullen Ass John J Flume type heeling tank stabilizer
US3228368A (en) * 1963-12-24 1966-01-11 Newport News S & D Co Ship structure and control means therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513797A (en) * 1968-08-21 1970-05-26 Litton Systems Inc Energy-absorbing beach for ship's wells and tanks
US4232623A (en) * 1977-11-25 1980-11-11 Brown & Root, Inc. Apparatus to reduce vessel motions
US4228754A (en) * 1978-03-13 1980-10-21 Sumitomo Electric Industries, Ltd. Oil/water storage tank having flexible partition membrane and chamfered internal edges and corners

Also Published As

Publication number Publication date
IL26362A (en) 1970-11-30
DE1295405B (de) 1969-05-14
FI46043C (sv) 1972-12-11
NO127290B (sv) 1973-06-04
BE685830A (sv) 1967-02-01
NL6611894A (sv) 1967-02-27
FI46043B (sv) 1972-08-31
JPS4824878B1 (sv) 1973-07-24
ES330542A1 (es) 1967-06-16
GB1105715A (en) 1968-03-13

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