EP0648668A1 - Bateau à grande vitesse, en particulier un ferry - Google Patents

Bateau à grande vitesse, en particulier un ferry Download PDF

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Publication number
EP0648668A1
EP0648668A1 EP93810728A EP93810728A EP0648668A1 EP 0648668 A1 EP0648668 A1 EP 0648668A1 EP 93810728 A EP93810728 A EP 93810728A EP 93810728 A EP93810728 A EP 93810728A EP 0648668 A1 EP0648668 A1 EP 0648668A1
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EP
European Patent Office
Prior art keywords
ship
hydrofoils
buoyancy body
support
buoyancy
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Withdrawn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
EP93810728A
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German (de)
English (en)
Inventor
Ernst Mohr
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP93810728A priority Critical patent/EP0648668A1/fr
Publication of EP0648668A1 publication Critical patent/EP0648668A1/fr
Withdrawn legal-status Critical Current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 
    • 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
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
    • 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
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B1/125—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising more than two hulls

Definitions

  • hydrofoils For smaller ships with a total weight of up to around 250 t, hydrofoils have proven themselves, with those in particular being those with fully immersed hydrofoils. These boat types are less or very little dependent on the waves. However, it can easily be calculated that when attempting to equip larger ships only with hydrofoils, without other buoyancy elements, the aerofoils must reach dimensions such that their production becomes too complex. That is why there are no such ships, because they would also require a disproportionately high propulsion power.
  • SWATH ships Another category of ships are the so-called SWATH ships, where SWATH is an acronym for Small Waterplane Area Twin Hull, ie small waterline area with a twin hull, the "Waterplane Area” ie the cross section of the supports that support the surface ship with the buoyancy bodies connects, is low. The wave influence is still there, but there is less wave resistance because the main water displacement takes place several meters below the water surface. In addition, this ship structure causes a smaller swing movement.
  • a disadvantage is that two buoyancy bodies with the same total volume have a larger surface area than a single buoyancy body of the same volume, which results in greater frictional resistance.
  • catamarans the double-hull ships, which are quieter than a single-hull ship with a large width, whereby the ship buoyancy takes place here by displacement.
  • the catamarans have advantages in calm waters, but the rocking movement remains very disruptive when the ship travels diagonally to the wave fronts.
  • hydrofoils installed under catamarans, which makes it easier to dive into the water surface.
  • wing catamarans also known under the name Foilcat, therefore have better properties than monohulls, mono-fuselages, with wings, e.g. B. the BOEING JETFOIL available on the market.
  • the schematically illustrated ship 1 represents a combination of several elements of different ship categories.
  • This combination as will be explained in more detail further below, enables the construction of a ship of over 250 t total weight, which can reach up to high speeds 50 knots allows a smooth ride, even with larger waves.
  • the surface ship 2 contains the structure, not essential to the invention, with the passenger compartments, control units, etc., which can be known per se.
  • the lift body 3 has two wings 5, which are called hydrofoils in English, which bring additional lift in normal or flight travel and together with a front or rear tail unit 6 serve for stabilization in the vertical direction, and at the rear a screw drive 7.
  • Figures 1, 3-7 also show the two water lines, where WLR stands for the water line for the ship at rest or at low speed and WLF for the water line when the ship is flying, in which the surface ship completely protrudes from the water .
  • the water line surface 8 the so-called small water plane area, is shown hatched, which corresponds to the cross-sectional area of the support 4.
  • the two side hulls 9 and 10 which are either permanently connected to the surface ship or, see FIG. 5, can be lowered as floating bodies 9a and 10b if the ship is traveling at a low speed or is moving located in the port. As a result, the draft of the ship is reduced at low speed or at rest and adapted to the depth of the port. These floats are then at higher speeds pulled up and are no longer necessary for the lift, because then the wings unfold their full effectiveness. It is also possible to lower only a part of the side hulls.
  • the profile of the side hulls 9 and 10, or 9a and 10a largely corresponds to that of a water wing catamaran such. B.
  • a foil cat ie a so-called wave cutter catamaran.
  • This shape of the side hulls causes a calm immersion of the hull in the case of high waves and completely avoids the so-called slamming, which then occurs with ordinary catamarans or trimarans with rounded or flat side hulls or center hulls with trimaran versions.
  • the essentially triangular, tapered shape of the side hulls 9 and 10 favors cutting through the waves and thus prevents the ship from braking when immersed.
  • the tail unit 6 at the tip of the buoyancy body 3, which, like the main wings 5, can be adjusted and controlled in a manner known per se in order to keep the ship in the vertical direction at a certain height above the water surface.
  • the tail unit 6 could also be attached to the rear part.
  • the adjustment of the wings or the rudder flaps attached to them takes place by sensing the height of the ship above the water surface.
  • both the buoyancy body 3 and the support 4 have their respective maximum cross-sectional area.
  • a section through the drive unit, for example with diesel engines, is not shown in FIG. 5, for example. 6 and 7 show the other two cross sections according to lines VI-VI and VII-VII in Fig. 1.
  • the ship according to the exemplary embodiment according to FIGS. 1-7 can have the following values, for example: Length of the ship 50 m Width of the ship 15 m Height of the entire ship 18 m Main wing area 60 m2 Total mass of the ship 900 tons Buoyancy of the displacement body 700 t (approx. 80% of the ship's weight) Wing lift 200 t Draft in the port 5 m Draft when flying 8 m Engine power 20,000 hp (14,800 kW) maximum speed around 40 knots (74 km / h).
  • Transport performance figure C 290 Model calculations have shown that this ship maintains its horizontal position in both the longitudinal and transverse directions, even in heavy seas, and thus effectively prevents the ship from rolling and pounding.
  • FIG. 8 shows a table from which it can be seen that the ship according to the invention is superior to the hydrofoil boats, which are not very sensitive to sea conditions, when the weight of the ship is high.
  • A the buoyancy that is proportional to L3
  • L length of the displacer
  • the resistance W is proportional to L2.
  • ⁇ constant, similar to that in airplanes, and generally has a value around 8 to a maximum of 10, as shown in the diagram in FIG. 8. With weights over 500 t, these ships can no longer be operated efficiently. This means that in the intended ferry operation at a speed of around 40 A hydrofoil according to the invention is superior to knots already from a ship weight of 250 t and especially with weights over 500 t.
  • the sliding number ⁇ is plotted as a function of the weight G.
  • the transport performance number C (admiralty number) is given, which in turn depends on the weight of the ship.
  • a transport performance figure C of approx. 280 at a speed of 47 knots, whereby a superiority of a boat according to the invention results clearly in excess of 500 tons of ship weight.
  • a high sliding number ⁇ can be achieved by using a relatively large buoyancy body, the displacement of the buoyancy body preferably being approximately 80%.
  • the ship can be well stabilized through the use of hydrofoils and stabilizer wings and through the use of a suitable prop or several props and especially through the use of side hulls of the wave-cutting type, a smooth journey is possible even in high seas, which makes seasickness, especially on longer journeys, can be largely avoided.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
EP93810728A 1993-10-18 1993-10-18 Bateau à grande vitesse, en particulier un ferry Withdrawn EP0648668A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93810728A EP0648668A1 (fr) 1993-10-18 1993-10-18 Bateau à grande vitesse, en particulier un ferry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93810728A EP0648668A1 (fr) 1993-10-18 1993-10-18 Bateau à grande vitesse, en particulier un ferry

Publications (1)

Publication Number Publication Date
EP0648668A1 true EP0648668A1 (fr) 1995-04-19

Family

ID=8215050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810728A Withdrawn EP0648668A1 (fr) 1993-10-18 1993-10-18 Bateau à grande vitesse, en particulier un ferry

Country Status (1)

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EP (1) EP0648668A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997010988A1 (fr) * 1995-09-20 1997-03-27 Nigel Gee & Associates Limited Batiments marins
GB2356603A (en) * 1999-11-25 2001-05-30 Michael John Wingeatt Hull having a buoyant keel
US6729258B1 (en) * 1998-08-04 2004-05-04 John Theodore Fuglsang Marine vessel for passengers, vehicular traffic or freight
IT202000011980A1 (it) * 2020-05-21 2021-11-21 Massimo Verme Scafo a geometria variabile per hydrofoil swath
WO2021234748A1 (fr) * 2020-05-21 2021-11-25 Verme Projects S.r.l. Coque à géométrie variable
IT202200017979A1 (it) * 2022-09-01 2024-03-01 Gerrisboats S R L Sistema integrato per il trasporto di passeggeri, o di merci, che comprende un dispositivo per la sostituzione rapida delle batterie per imbarcazioni

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623444A (en) * 1970-03-17 1971-11-30 Thomas G Lang High-speed ship with submerged hulls
DE2348200A1 (de) * 1972-09-29 1974-04-11 Politechnika Gdanska Verdraengungs-hochseeschiff
FR2552046A1 (fr) * 1983-09-19 1985-03-22 Contant Claude Bateau forme d'une plate-forme surelevee a l'aide de piliers sur des flotteurs
EP0495722A1 (fr) * 1991-01-18 1992-07-22 Societe Nouvelle Des Ateliers Et Chantiers Du Havre Navire à déplacement et à plusieurs coques à couple de redressement transversal limité et à résistance à l'avancement réduite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623444A (en) * 1970-03-17 1971-11-30 Thomas G Lang High-speed ship with submerged hulls
DE2348200A1 (de) * 1972-09-29 1974-04-11 Politechnika Gdanska Verdraengungs-hochseeschiff
FR2552046A1 (fr) * 1983-09-19 1985-03-22 Contant Claude Bateau forme d'une plate-forme surelevee a l'aide de piliers sur des flotteurs
EP0495722A1 (fr) * 1991-01-18 1992-07-22 Societe Nouvelle Des Ateliers Et Chantiers Du Havre Navire à déplacement et à plusieurs coques à couple de redressement transversal limité et à résistance à l'avancement réduite

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997010988A1 (fr) * 1995-09-20 1997-03-27 Nigel Gee & Associates Limited Batiments marins
AU716116B2 (en) * 1995-09-20 2000-02-17 Adx Investment Establishment Marine vessels
US6044784A (en) * 1995-09-20 2000-04-04 Nigel Gee And Associates Limited Marine vessels
US6729258B1 (en) * 1998-08-04 2004-05-04 John Theodore Fuglsang Marine vessel for passengers, vehicular traffic or freight
GB2356603A (en) * 1999-11-25 2001-05-30 Michael John Wingeatt Hull having a buoyant keel
GB2356603B (en) * 1999-11-25 2003-04-16 Michael John Wingeatt A boat having a hull and a buoyant keel
IT202000011980A1 (it) * 2020-05-21 2021-11-21 Massimo Verme Scafo a geometria variabile per hydrofoil swath
WO2021234748A1 (fr) * 2020-05-21 2021-11-25 Verme Projects S.r.l. Coque à géométrie variable
IT202200017979A1 (it) * 2022-09-01 2024-03-01 Gerrisboats S R L Sistema integrato per il trasporto di passeggeri, o di merci, che comprende un dispositivo per la sostituzione rapida delle batterie per imbarcazioni
WO2024047545A1 (fr) * 2022-09-01 2024-03-07 Gerrisboats S.R.L. Système intégré pour le transport de passagers ou de marchandises qui comprend un dispositif pour le remplacement rapide de batteries pour navires

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