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EP0870673A1 - "Light ship structure" - Google Patents

"Light ship structure" Download PDF

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Publication number
EP0870673A1
EP0870673A1 EP98106100A EP98106100A EP0870673A1 EP 0870673 A1 EP0870673 A1 EP 0870673A1 EP 98106100 A EP98106100 A EP 98106100A EP 98106100 A EP98106100 A EP 98106100A EP 0870673 A1 EP0870673 A1 EP 0870673A1
Authority
EP
European Patent Office
Prior art keywords
ship
hull
deck
planking
bulkheads
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.)
Withdrawn
Application number
EP98106100A
Other languages
German (de)
English (en)
French (fr)
Inventor
Giafranco Fantacci
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.)
Intermarine SpA
Original Assignee
Intermarine SpA
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 Intermarine SpA filed Critical Intermarine SpA
Publication of EP0870673A1 publication Critical patent/EP0870673A1/en
Withdrawn legal-status Critical Current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 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/68—Panellings; Linings, e.g. for insulating purposes
    • 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
    • B63B3/14—Hull parts
    • B63B3/56—Bulkheads; Bulkhead reinforcements
    • 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
    • B63B3/14—Hull parts
    • B63B3/70—Reinforcements for carrying localised loads, e.g. propulsion plant, guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/30—Mounting of propulsion plant or unit, e.g. for anti-vibration purposes

Definitions

  • the present invention relates to ship structures, and in particular relates to light ship structures, such as ships with the hull made of composite material.
  • the purpose of the present invention is thus to provide a light ship structure in which the planking of the hull is flexible to the violent stresses of an impulse-like nature.
  • a further purpose of the present invention is to provide a ship structure in which the load-bearing beam consists of a structure separate from direct contact with the water, and hence also from the stresses induced by the water.
  • the subject of the present invention is therefore a ship structure comprising a hull, preferably monocoque, made of composite material, a number of decks, a number of transverse bulkheads structurally continuous from the bilge to the forecastle deck, characterized in that the said bulkheads are rigidly connected to the decks and to the planking of the hull from the forecastle deck to the deck immediately above the bilge of the ship, i.e., the main deck, the peripheral edge of said transverse bulkheads being connected to the planking of the hull in the area beneath said main deck by elastic joining means.
  • one or more longitudinal structural elements are arranged, which are structurally continuous basically throughout the entire length of the hull, and are rigidly connected to the said transverse bulkheads.
  • the said structural elements may advantageously be the ship's main tanks.
  • Fig. 1 shows a ship structure according to the present invention in which 1 designates the hull of the said structure.
  • the decks are traversed by the transverse watertight bulkheads 3, to which they are all rigidly connected; the said bulkheads are connected to the portion of the hull between the main deck 22 and the bilge 101 of the hull 1 by elastic joining means 103.
  • the elements 5 with which the ship is equipped, for example, the machines are connected, in a manner which is in itself known, to the deck 23 located above, by means of special cradles 105, preferably made of composite material.
  • Fig. 2 shows a cross section of the ship's structure according to the invention.
  • the decks 20, 21 and 22 are connected to the hull 1.
  • the forecastle 24 is connected to the forecastle deck 20.
  • the decks are all provided with their respective transverse supporting beams 120, 121 and 122, and longitudinal supporting beams 220, 221 and 222.
  • the watertight transverse bulkhead 3 is fastened with fixing means 201 to the hull from the forecastle deck 20 to the main deck 22.
  • the portion 203 of the bulkhead lying below the said deck is inserted in the guide 103 having a sinusoidal profile, which is connected to the bilge 101 of the hull.
  • the three main tanks 4 are connected to the bulkhead 3 by means of the flanges 104.
  • Fig. 3 shows the ship structure of the invention broken down into its basic parts. Like parts are indicated by the same numbers.
  • the peripheral edge of the portion 203 of the bulkhead 3 is made in such a way that, as emerges from Fig. 2, it is not in direct contact with the planking of the hull 1.
  • Fig. 4 which illustrates a detail of the connection between the guide 103 and the peripheral edge of the portion 203 of the bulkhead 3.
  • Fig. 5 illustrates the insertion of the portion 203 of the bulkhead 3 in the guide 103 having a sinusoidal profile. Between the guide 103 and the bulkhead is inserted a filler 113 made of elastomer material or the like.
  • the operation of the ship structure according to the present invention will appear evident from what follows. As has already been said, in ship structures of a known type, of extreme importance was the problem linked to the absorption of the stresses of an impulse-like nature by the planking of the ship's hull.
  • the ship structure according to the present invention enables, in fact, a greater freedom of flexure for the portion of the hull situated below the main deck 22.
  • the load-bearing structure of the ship is actually separate from contact with the water, in that the elimination of the rigid connection between the bulkheads and the planking of the hull displaces inwards the so-called "ship's main beam", which is made up, in the longitudinal direction, of the decks and their longitudinal stiffeners, the tanks and the planking of the sides, from the forecastle deck to the main deck, and in the transverse direction, of the decks and their transverse stiffeners and of the bulkheads.
  • connection between the transverse bulkheads 3 and the bilge 101 of the hull is made by means of the guides 103 shaped with a sinusoidal profile.
  • the type of connection made is an elastic joint, in so far as the peripheral edge of the portion 203 of the bulkhead 3 is inserted in the guide 103 not in contact with the planking and with a certain freedom of movement, guaranteed by the filler 113 made of material of an elastomer kind, which is able to guarantee the watertightness of the bulkhead but is not able to transmit the considerable mechanical stresses resulting from modest deformations of the planking.
  • the sinusoidal shape of the walls of the guide 103 contributes to increasing the flexibility of the joint.
  • planking of the structure below the main deck is free to bend under the effects of the pressure impulses, from the stem to the stern, and hence over a very long span. In this way the danger of disbonding of the composite material due to excessive flexure on spans that are too short with respect to the thickness is considerably reduced.
  • the planking may thus be lighter than in known structures, thus decreasing the total weight of the ship.
  • the stiffness of the "ship's main beam” and the reduced distance between the planking of the hull and the lower part of the tanks enable minimizing of the compressive and tensile stresses induced on the planking itself by the flexure of the ship.
  • the tanks 4 become an integral part of the load-bearing structure of the ship only on account of the fact that it is clearly necessary for them to be advantageously located in a position where their load can be exploited as an element that is able to contribute to the strength of the ship structure in question. In theory, their role could be played in a similar way by similar continuous structural elements.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Materials For Medical Uses (AREA)
  • Endoscopes (AREA)
  • Prostheses (AREA)
EP98106100A 1997-04-09 1998-04-03 "Light ship structure" Withdrawn EP0870673A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97GE000031A IT1293201B1 (it) 1997-04-09 1997-04-09 Struttura navale leggera.
ITGE970031 1997-04-09

Publications (1)

Publication Number Publication Date
EP0870673A1 true EP0870673A1 (en) 1998-10-14

Family

ID=11355012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106100A Withdrawn EP0870673A1 (en) 1997-04-09 1998-04-03 "Light ship structure"

Country Status (2)

Country Link
EP (1) EP0870673A1 (it)
IT (1) IT1293201B1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111284631A (zh) * 2020-02-28 2020-06-16 广船国际有限公司 一种船舶艏部结构及船舶
WO2020212855A1 (en) * 2019-04-19 2020-10-22 Fincantieri S.P.A. Cabin structure for ship and method of assembly of a prefabricated cabin
IT201900025357A1 (it) * 2019-12-23 2021-06-23 Intermarine Spa Struttura di scafo

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2333289A (en) * 1943-04-06 1943-11-02 Hopeman Bros Inc Ship joiner bulkhead
US2560269A (en) * 1947-11-21 1951-07-10 Isoleringsaktiebolaget Wmb Insulated wall and room
US3760757A (en) * 1971-04-12 1973-09-25 W Piening Improvements in or relating to the sound-proofing of ships
IT1186843B (it) 1985-03-15 1987-12-16 Intermarine Spa Nave con scafo monoguscio di materiale composito a base di materia plastica
IT1248252B (it) 1991-01-09 1995-01-05 Intermarine Spa Struttura di scafo, in particolare di materiale composito a base di materia plastica opportunamente rinforzata.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2333289A (en) * 1943-04-06 1943-11-02 Hopeman Bros Inc Ship joiner bulkhead
US2560269A (en) * 1947-11-21 1951-07-10 Isoleringsaktiebolaget Wmb Insulated wall and room
US3760757A (en) * 1971-04-12 1973-09-25 W Piening Improvements in or relating to the sound-proofing of ships
IT1186843B (it) 1985-03-15 1987-12-16 Intermarine Spa Nave con scafo monoguscio di materiale composito a base di materia plastica
IT1248252B (it) 1991-01-09 1995-01-05 Intermarine Spa Struttura di scafo, in particolare di materiale composito a base di materia plastica opportunamente rinforzata.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020212855A1 (en) * 2019-04-19 2020-10-22 Fincantieri S.P.A. Cabin structure for ship and method of assembly of a prefabricated cabin
IT201900025357A1 (it) * 2019-12-23 2021-06-23 Intermarine Spa Struttura di scafo
WO2021130674A1 (en) * 2019-12-23 2021-07-01 Intermarine S.P.A. Hull structure
CN111284631A (zh) * 2020-02-28 2020-06-16 广船国际有限公司 一种船舶艏部结构及船舶

Also Published As

Publication number Publication date
ITGE970031A1 (it) 1998-10-09
IT1293201B1 (it) 1999-02-16
ITGE970031A0 (it) 1997-04-09

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