US3834339A - Construction of ships - Google Patents

Construction of ships Download PDF

Info

Publication number
US3834339A
US3834339A US00297629A US29762972A US3834339A US 3834339 A US3834339 A US 3834339A US 00297629 A US00297629 A US 00297629A US 29762972 A US29762972 A US 29762972A US 3834339 A US3834339 A US 3834339A
Authority
US
United States
Prior art keywords
ship
units
starboard
port
unit
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
US00297629A
Other languages
English (en)
Inventor
R Rutherford
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.)
SWAN HUNTER GROUP Ltd
Original Assignee
SWAN HUNTER GROUP Ltd
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 SWAN HUNTER GROUP Ltd filed Critical SWAN HUNTER GROUP Ltd
Application granted granted Critical
Publication of US3834339A publication Critical patent/US3834339A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/02—Hulls assembled from prefabricated sub-units
    • B63B3/04—Hulls assembled from prefabricated sub-units with permanently-connected sub-units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/06—Shape of fore part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/08—Shape of aft part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B71/00—Designing vessels; Predicting their performance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks

Definitions

  • ABSTRACT [30] Foreign Application Priority Data A fore end structure for a ship, and method of con- Oct. 21, 1971 Great Britain 43990/71 Strueting same, consisting of a number of prefabricated units adapted to be assembled to form said fore [52] U.S. Cl 114/77 R nd, h port and starboard of said units being of an [51] Int. Cl B63b 3/02 hogo al nature in that the webs interconnecting the [5 8] Field of Search 114/77 A, 77 R, 65 R sideshell portion and associated bulkhead of said units extend normally to the waterline of the ship, thereby [56] References Cit d to improye the efficiency of the sideshell stiffening.
  • FIG. 1 of the accompanying drawings clearly shows the general arrangement of the transverses 1 and sideshell 2 at the fore end of a ship. It can be seen that, because of the shaping of the fore end of the ship towards the centreline of the ship, the side transverses l, which are normal to the centreline of the ship, meet the shell 2 at quite an acute angle a. Thus the efficiency of the transverses 1 as strength members is greatly reduced.
  • a ship having a fore end and/or stern comprising a plurality of prefabricated units including port and starboard units each of which have a sideshell portion, an elongate bulkhead spaced from and extending substantially parallel with the associated sideshell portion, and a plurality of webs extending between said bulkhead and sideshell portion to be substantially normal to the sideshell portion.
  • the units further include a base unit, a stem unit and an upper unit.
  • the units themselves may each comprise a series of sub-units depending on the cranage available at the berth.
  • a method of constructing the fore end and/or the stern of a ship comprises the steps of:
  • FIG. 2 is a horizontal section through part of the fore end of a ship according to the invention.
  • FIG. 3 is a transverse vertical section through the fore end showing typical webs
  • FIG. 4 is a plan view of the fore end at the forecastle deck
  • FIG. 5 is a vertical section along the centreline of a ship at the fore end
  • FIG. 6 is an exploded perspective view of a fore end constructed according to the invention.
  • Oil tankers commonly have at least one row of tanks extending centrally over the cargo tank range of the ship, and port and starboard wing tanks. The latter tanks are separated from the centre tanks by longitudinal bulkheads extending between the bottom plating of the hull and the upper deck, and longitudinally parallel with the centreline of the ship.
  • the longitudinal bulkheads 3, between the centre and wing tanks, are terminated at the transverse fore peak bulkhead 4, which extends from the bottom plating of the hull to the upper deck.
  • the fore end comprises five basic units, shown as A to D in FIG. 6.
  • these basic units can themseleves each comprise a series of sub-units without departing from the scope of the invention.
  • Unit A is a double bottom structure comprising a fully plated tank top 6 which extends forward from the transverse bulkhead 4'to the extremity of the bow (or bulb if fitted) and transversely from one side of the ship to the other.
  • This unit is prefabricated by building it upside down with the top 6 forming the base during construction.
  • the transverse floors 8, longitudinal girders and all stiffening members are attached to the top 6, the hull plating or shell 10 then being fitted to form the complete double bottom unit A.
  • This structure is then positioned on a berth to act as a building platform for the rest of the fore end.
  • the port and starboard side units B extend forward from the bulkhead 4 to the stem unit C and upward between the top 6 and the upper deck unit D.
  • the units each comprise an extension bulkhead 12 extending from the transverse bulkhead 4 forward to the stem unit C.
  • These bulkheads 12 are substantially parallel with the adjacent outer shell 16 of the fore end, and slope inwards towards the centreline 14 of the ship as shown in FIG. 2.
  • Transverse webs 18 extend normally from the bulkheads 12 between said bulkheads and the shell 16, said webs therefore being substantially normal to said shell and at an acute angle to the centerline 14, such orientation of the webs improving the strength of the fore end compared with the arrangement of FIG. 1 where the webs will be seen to be perpendicular to the centerline and at an acute angle with respect to the shell.
  • the units B are each prefabricated with the bulkhead 12 as the base, horizontal flat members 20 being attached outboard of the bulkhead 12 at various optimum levels to break up the span of the vertical panel webs 18. After all stiffening members have been attached, the outer shell 16 is fitted in position.
  • the units B can then be located on unit A and faired in position.
  • the horizontal brackets 22 which extend between the forward ends of the two longitudinal bulkheads 12 are fitted at various height intervals to tie the port and starboard units together.
  • the remaining brackets 23 at the tank top 6, transverse bulkhead 4 etc. are then fitted.
  • transverse floors 8 of unit A run normal to the ships centreline and then crank over to line up with the webs 18 of units B.
  • the stem unit C extends from the open ends of units B to form the front extremity of the ship, the unit being located on the bottom unit A to extend upwards to the upper deck 28.
  • a simple jig is made to take the shape of the web 24 which provides a base to the unit during construction.
  • the centreline web 26, horizontal flats, breasthooks, stiffeners, shell and stem plates are then fitted in position.
  • the completed unit' is then brought into position at the forward end of unit A, fitting onto the open ends of units B.
  • the upper deck unit D extends forward from the forecastle front to the stem of the ship, and transversely from one'side of the ship to the other.
  • the upper deck 28 forms a base for the unit, the centreline bulkhead and all other internal bulkheads, together with all webs, stiffeners and the forecastle front, being erected on the upper deck.
  • the forecastle deck 30 is fitted over this structure to form a sandwich and the shell plating is then fitted to complete the unit which is located on the previously assemblied units to complete the fore end.
  • the sloping bulkheads -12, the tank top 6 and web 24 are non-watertight so that the entire fore peak tank i.e.
  • the centre tank 34 as defined by the bulkheads 4, 12, the web 24, the tank top 6 and the upper deck 28 could readily be used as a clean ballast tank by making all the defining boundaries watertight.
  • the space outside the components defining the central tank 34 is then a dry space and forms a cofferdam offering a secondary barrier against side or bottom shell damage. This dry space, which contains most of the structure, will not require painting whereas the centre tank, being substantially flat-surfaced, can easily be painted.
  • the invention affords simplicity of unit breakdown, the structure being designed for manufacture by modern steelworking facilities.
  • Accessability throughout the whole fore end structure is greatly improved by access openings at each successive working platform, thus enabling any further internal staging readily to be erected.
  • the described structure enables anchorage arrangements to be designed so as not to interfere with any primary structure. It can be seen in FIG. 4 that the hawse pipe 36 from the chain storage locker 38 to the ships shell does not cut through any of the transverse webs 18 as it would in conventionally constructed fore ends.
  • the plurality and positioning of the bulkheads in the forecastle tweendecks allows the heavy loading from deck machinery and shipped seas on the deck to be dis tributed evenly throughout the structure, thus eliminating pillars with their concentrated point loads.
  • the invention can be applied to the construction of, and method of constructing. the stern of a ship. In all cases the simplicity of construction and the orthogonal relationship between the webs l8 and the shell of the ship provide particular advantages over established arrangements.
  • a method of constructing the fore endof a ship comprising steps of:
  • port and starboard units each comprise an elongated sideshell, an elongated bulkhead spaced from and extending substantially parallel to the elongated sideshell, and a plurality of webs extending between said bulkhead and said sideshell substantially perpendicular to the sideshell, the method being further characterized in that the port and starboard units are located and secured on the base unit with the elongated shell portions thereof at an angle to the longitudinal axis of the ship and with the webs of the port and starboard units at an angle other than 90 to the longitudinal axis of the ship.
  • a ship having a fore end, the fore end comprising port, starboard, base, stem and upper units, the port and starboard units being located on and secured to the base unit as is also the stem unit forwardly of the port and starboard units, said upper unit being located on and covering said stem and said port and starboard units, each port and starboard unit comprising an elonated sideshell, an elongate bulkhead spaced from and extending substantially parallel to its associated sideshell and a plurality of webs extending between said sideshell and said bulkhead, said sideshells being (a) angularly disposed relative and in converging relation to the longitudinal axis of the ship and (b) with said plurality of webs perpendicularly related thereto, said webs by virtue of their perpendicular orientation to the sideshell and the angular converging orientation of the latter with respect to the longitudinal axis of the ship, being disposed at an acute angle relative to said longitudinal axis.
  • a ship according to claim 3 including a bulkhead extending transversely from one side of the ship to the other and upwardly from the bottom plating of the ships hull to the upper unit, the fore end of the ship.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Ship Loading And Unloading (AREA)
  • Revetment (AREA)
US00297629A 1971-10-21 1972-10-16 Construction of ships Expired - Lifetime US3834339A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4899071 1971-10-21

Publications (1)

Publication Number Publication Date
US3834339A true US3834339A (en) 1974-09-10

Family

ID=10450715

Family Applications (1)

Application Number Title Priority Date Filing Date
US00297629A Expired - Lifetime US3834339A (en) 1971-10-21 1972-10-16 Construction of ships

Country Status (9)

Country Link
US (1) US3834339A (es)
JP (1) JPS4862187A (es)
DE (1) DE2251273A1 (es)
ES (1) ES408038A1 (es)
FR (1) FR2157633A5 (es)
GB (1) GB1346919A (es)
IT (1) IT969769B (es)
NL (1) NL7214113A (es)
SE (1) SE7213614L (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007616A1 (en) * 1996-08-16 1998-02-26 J. Ray Mcdermott S.A. Vessel turret systems

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI113032B (fi) * 1998-01-19 2004-02-27 Kvaerner Masa Yards Oy Monikannellisen, suuren, etenkin merellä käytettävän rakenteen, kuten matkustajalaivan tai vastaavan rakentamismenetelmä
CN109263791A (zh) * 2018-09-30 2019-01-25 广船国际有限公司 一种船舶防撞结构
CN111605679B (zh) * 2020-05-28 2021-12-17 上海外高桥造船有限公司 一种40万吨矿砂船舷侧总段的总组工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190926467A (en) * 1909-11-15 1910-01-27 George Burton Hunter Improvements in and relating to Ships.
DE1194724B (de) * 1962-10-20 1965-06-10 Kieler Howaldtswerke Ag Verfahren zum nachtraeglichen Vergroessern der Seitenhoehe von fertiggebauten Frachtschiffen aller Art
US3447503A (en) * 1967-07-13 1969-06-03 Litton Great Lakes Corp Method and apparatus for modular construction of a ship
US3698344A (en) * 1970-09-04 1972-10-17 Mitsui Shipbuilding Eng Ship building method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190926467A (en) * 1909-11-15 1910-01-27 George Burton Hunter Improvements in and relating to Ships.
DE1194724B (de) * 1962-10-20 1965-06-10 Kieler Howaldtswerke Ag Verfahren zum nachtraeglichen Vergroessern der Seitenhoehe von fertiggebauten Frachtschiffen aller Art
US3447503A (en) * 1967-07-13 1969-06-03 Litton Great Lakes Corp Method and apparatus for modular construction of a ship
US3698344A (en) * 1970-09-04 1972-10-17 Mitsui Shipbuilding Eng Ship building method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007616A1 (en) * 1996-08-16 1998-02-26 J. Ray Mcdermott S.A. Vessel turret systems
GB2331058A (en) * 1996-08-16 1999-05-12 Mcdermott Sa J Ray Vessel turret systems
GB2331058B (en) * 1996-08-16 2000-10-18 Mcdermott Sa J Ray Vessel turret systems

Also Published As

Publication number Publication date
JPS4862187A (es) 1973-08-30
FR2157633A5 (es) 1973-06-01
SE7213614L (es) 1973-04-24
ES408038A1 (es) 1975-11-01
GB1346919A (en) 1974-02-13
IT969769B (it) 1974-04-10
NL7214113A (es) 1973-04-25
DE2251273A1 (de) 1973-04-26

Similar Documents

Publication Publication Date Title
US20230160368A1 (en) Floating wind semi-submersible with t-shaped pontoon
US6170420B1 (en) Rebuilt double hull vessel and method of rebuilding a single hull vessel into a double hull vessel
US6708636B1 (en) Rebuilt double hull tanker and method of rebuilding an existing single hull tanker into a rebuilt double hull tanker
US5086723A (en) Double-hulled vessel construction having vertical double-walled longitudinal bulkhead
US6907836B2 (en) Rebuilt double hull tanker and method of rebuilding an existing single hull tanker into a rebuilt double hull tanker
US3834339A (en) Construction of ships
EP0194531A1 (en) Ship with monocoque hull made of plastic-based composite material
US6532889B1 (en) Aluminum fishing boat
US4779556A (en) Boat with sectional hull assembly held by geodetically oriented tendons
US4638754A (en) Vessel hull and bulkheads construction employing curved plating
US3942460A (en) Ship hull and a method of assembling the same
KR890003114Y1 (ko) 선체구조
US2741208A (en) Tank ship bulkhead and girder construction
US6637359B1 (en) System and method for internally fitting a new inner hull to an existing outer hull to form a rebuilt double hull vessel
US2330022A (en) Method of constructing welded metal water-going vessels
WO2018099906A1 (en) Container ship with reinforced hull
US2328437A (en) Lifedoat
US20020069805A1 (en) Fast fire boat
US3919960A (en) Converted ship and method of converting
DK179427B1 (en) Container ship with reinforced hull
US1891602A (en) Sectional cruiser
KR970010820B1 (ko) 콘테이너 선박용 선박선체
US1343491A (en) Ship
NO852556L (no) Anordning ved et halvt nedsenkbart fartoey med to vesentlig parallelle pongtonger.
SU893679A1 (ru) Способ постройки цилиндрической вставки корпуса танкера