CN116476970A - Shallow draft high-speed catamaran - Google Patents

Shallow draft high-speed catamaran Download PDF

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Publication number
CN116476970A
CN116476970A CN202310129197.8A CN202310129197A CN116476970A CN 116476970 A CN116476970 A CN 116476970A CN 202310129197 A CN202310129197 A CN 202310129197A CN 116476970 A CN116476970 A CN 116476970A
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CN
China
Prior art keywords
ship
bow
propeller
wave
shallow draft
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.)
Pending
Application number
CN202310129197.8A
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Chinese (zh)
Inventor
林纯鑫
彭亮
郭智峰
詹锡波
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.)
Afai Southern Shipyard Panyu Guangzhou Ltd
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Afai Southern Shipyard Panyu Guangzhou 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 Afai Southern Shipyard Panyu Guangzhou Ltd filed Critical Afai Southern Shipyard Panyu Guangzhou Ltd
Priority to CN202310129197.8A priority Critical patent/CN116476970A/en
Publication of CN116476970A publication Critical patent/CN116476970A/en
Pending legal-status Critical Current

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    • 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
    • B63B1/121—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising two hulls
    • 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
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The application relates to a shallow-draft high-speed catamaran, which comprises a hull, wherein the hull comprises two sheet bodies, and the two sheet bodies are connected through a connecting bridge; the sheet body comprises a wave penetrating bow, a bilge middle and a square stern which are connected in sequence in a smooth transition manner; the bottom surface of the wave penetrating bow is in a deep V-shaped form, and the front end of the wave penetrating bow comprises a pointed upper bow and a pointed lower bow; the cross section area of the wave-penetrating bow is gradually increased from front to back; the left side and the right side of the front part of the sheet body are provided with concave half-small waterline molded surfaces, and the depth of the concave is gradually reduced from front to back; the half-minor waterline molded surface is positioned at the designed waterline height of the ship body; the design can simultaneously consider the routes of different navigation areas such as offshore shoal, coastal navigation area, offshore navigation area and the like, can ensure that the propeller does not touch the bottom under the condition of 2 meters of water depth at low tide level, ensures the navigation safety of shallow draft working conditions, and improves the wave resistance, navigability and passenger comfort of the ship while ensuring the rapidness.

Description

Shallow draft high-speed catamaran
Technical Field
The invention relates to the technical field of ships, in particular to a shallow-draft high-speed catamaran.
Background
With the rapid development of domestic ship construction, the scale, the yield and the marine transportation demand of the marine ship construction are rapidly increased, and particularly with the rise of industries with higher requirements on rapidness, such as wind power operation and maintenance markets, high-speed passenger transport markets and the like, the demand of the marine high-speed ship is also increased. Compared with a single ship, the catamaran has the advantages of small wave making resistance and strong stability, and is favored in the high-speed ship market. In order to meet the use requirements of coastal and offshore water areas under high sea conditions, the ship also needs to have better wind and wave resistance capability and passenger comfort on the premise of maintaining better rapidness, reduces the passenger seasickness rate, and can be particularly used in shoal areas with larger sea tide height difference and limited draught.
According to the domestic situation of different water areas, a special requirement exists for a shallow-draft high-speed catamaran type, for example, in the areas of the Guangdong mountain, the Jiangsu, the east and other water areas, a large part of the water area has a water depth of about 2 meters at a low tide level, so that the high-speed catamaran with the shallow draft is required to meet the transportation and transportation at a low water level. The sea area has been followed by new vessels built within 30 meters, including monohull and catamaran, which, while meeting the shallow draft requirement, have a lower voyage speed than catamaran at equivalent host power. The catamaran has high speed, but has larger draft than a single ship, and the ship attitude is difficult to control during high-speed navigation, and the conditions of stern leaning (about 0.9m of the bow-stern draft of the ship), bottom contact of a propeller and the like are frequently caused, so that the overall operation condition is not ideal, and the requirement of product upgrading is met.
Disclosure of Invention
The invention aims at overcoming the defects, and provides a shallow-draft high-speed catamaran which is suitable for offshore operations of offshore shoals, coasts and offshore navigation areas, in particular for shoal areas with large sea tide height difference and limited draft.
The technical scheme adopted by the invention for solving the technical problems is that the shallow-draft high-speed catamaran comprises a hull, wherein the hull comprises two sheet bodies which are symmetrically arranged left and right, and the two sheet bodies are connected through a connecting bridge;
the sheet body comprises a wave penetrating bow, a round bilge middle ship and a square stern which are connected in sequence in a smooth transition mode;
the bottom surface of the wave penetrating bow is in a deep V-shaped line shape, and the front end of the wave penetrating bow comprises a pointed upper bow and a pointed lower bow;
the cross section area of the wave-penetrating bow is gradually increased from front to back;
the left side and the right side of the front part of the sheet body are provided with concave half-small waterline molded surfaces, and the depth of the concave is gradually reduced from front to back;
the half-minor waterline profile is located at the designed waterline height of the ship body.
Further, the length of the wave-penetrating bow is 0.1-0.2 times of the ship length;
the length of the round bilge ship is 0.6-0.8 times of the ship length, and the width of the round bilge ship is 0.1-0.25 times of the ship width;
the length of the square stern is 0.1-0.2 times of the ship length, and the width of the square stern is 0.25-0.3 times of the ship width.
Further, the bottom plate and the side plates in the bilge ship are smoothly transited through an arc, and the radius of the arc is 0.03-0.06 times of the width of the ship;
the included angle between the bottom plate and the side plate of the square stern is 90-125 degrees.
Furthermore, the lower side surface of the upper bow, the upper side surface of the lower bow and the lower side surface of the lower bow are inclined surfaces;
the included angle between the lower side surface of the lower bow and the baseline of the ship body is 35-40 degrees, and the included angle between the lower side surface of the upper bow and the upper side surface of the upper bow is 55-60 degrees.
Further, the cross section of the square stern is gradually changed from the round bilges to turn into the turn-around bilges from front to back.
Further, the rear part of the lower side surface of the square stern is provided with a concave screw abdication groove, and a screw is arranged in the middle of the screw abdication groove.
Furthermore, the propeller shaft of the propeller is obliquely arranged, and the installation angle is 5-8 degrees.
Further, the lowest point of the blade of the propeller is located below the ship body baseline, and the distance between the lowest point of the blade and the ship body baseline is 120-150mm.
Further, the distance between the top end of the propeller abdication groove and the blade is 0.15-0.2 times of the blade diameter, and the distance between the two bottom ends of the propeller abdication groove is 1.4-1.5 times of the blade diameter.
Further, the height of the front deck surface of the ship body is larger than that of the rear deck surface, the front end surface of the connecting bridge is an inclined surface, and the lower side surface of the connecting bridge is a curved surface.
Compared with the prior art, the invention has the following beneficial effects:
the rapidity of the wave penetration bow deep V-shaped ship shape and the wave resistance of the ship shape with a small waterplane are considered;
the round bilge middle and square stern enables the hull to have a larger square coefficient, so that the floating center of the ship moves backwards, the tail of the ship is obviously lifted when sailing at a high speed, and the ship has a more stable sailing state;
the design of concave of the propeller abdication groove can improve the propulsion efficiency of the propeller and reduce the maximum draft of the ship;
the marine propeller is suitable for offshore operations in offshore shoals, coasts and offshore navigation areas, particularly for shoal areas with large sea tide height and low level difference and limited draft, particularly for the situation that the propeller does not touch the bottom under the condition of 2 meters of water depth at low tide level, the sailing safety of shallow draft working conditions is ensured, the rapidness of the ship is ensured, and the seagoing, navigability and passenger comfort of the ship are improved.
The ship body in the design can obtain higher navigational speed than the ship shape of a small waterplane plane, and better wave resistance than the conventional deep V-shaped angle ship shape, and meanwhile, the design draft and high-speed navigation state of the ship are balanced, so that the safety and high-speed navigation requirements of the shoal sea area are met.
The design integrates the half-small waterplane deep V-shaped bow, round bilge midship and square tail line type, combines the design of a concave propeller abdication groove and the control of the propeller axis angle, and maintains the sailing state of the ship between 0.2 and 0.4 degrees of stern leaning at high sailing speed; the ship body can simultaneously consider the routes of different navigation areas such as offshore shoal, coastal, offshore navigation areas and the like, can meet various operation demands, can ensure that the propeller does not touch the bottom under the condition of 2 meters of water depth particularly at low tide level, ensures the navigation safety of shallow draft working conditions, ensures the rapidness of the ship, and improves the wave resistance, navigability and passenger comfort of the ship.
Drawings
The patent of the invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a hull structure;
FIG. 2 is a perspective view of the fore end of the hull;
FIG. 3 is a perspective view of the aft end of the hull;
FIG. 4 is a schematic view of a bow line;
FIG. 5 is a schematic view of a line in a ship;
FIG. 6 is a schematic view of the stern line;
figure 7 is a schematic flow diagram of the hull front elevation front deck.
In the figure:
1-wave penetrating bow; 2-round bilges; 3-square stern; 4-propeller; 5-front deck face; 6-rear deck face; 7-boarding the bow; 8-launching the bow; 9-half-minor waterline profile; 10-a propeller abdication groove; 11-connecting bridge.
Detailed Description
The preferred embodiments of the present invention will be described in more detail below, however, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
For a large part of water areas with the water depth of about 2 meters at low tide level, the existing catamaran has high navigational speed, but has larger draft than a single ship, and the navigational state of the ship is difficult to control during high-speed navigation, and the conditions of stern leaning (the difference of the forward and stern draft of the ship is about 0.9 m), bottoming of the propeller 4 and the like often occur, so the overall operation condition is not ideal, and the requirement of product upgrading is met.
In view of the above problems, the present embodiment provides a shallow draft high-speed catamaran suitable for offshore operations in offshore shoals, coasts and offshore navigation areas, particularly in shallow areas with large sea tide height difference and limited draft.
As shown in fig. 1-7, the shallow draft high speed catamaran comprises a hull, wherein the hull comprises two sheet bodies symmetrically arranged left and right, and the two sheet bodies are connected through a connecting bridge 11;
the sheet body comprises a wave penetrating bow 1, a bilge middle ship 2 and a square stern 3 which are connected in sequence in a smooth transition mode;
the bottom surface of the wave penetrating bow 1 is in a deep V-shaped line, the front end of the wave penetrating bow 1 comprises a pointed upper bow 7 and a pointed lower bow 8, the upper bow 7 and the lower bow 8 form a Z-shaped wave penetrating body, a design waterline can be prolonged, wave-making resistance of a ship in high-speed navigation is reduced, the longitudinal volume is increased, buoyancy reserve distribution is more reasonable, and the navigation state is more stable;
the cross section area of the wave-penetrating bow 1 is gradually increased from front to back;
the left side and the right side of the front part of the sheet body are provided with concave half-small waterline molded surfaces 9, and the depth of the concave is gradually reduced from front to back;
the half-minor waterline profile 9 is positioned at the designed waterline height of the ship body;
the deep V hull is adopted at the front end of the ship in the design, so that the stabilizing force and the minimum swing can be obtained from sailing, the concave half small waterplane line type is arranged near the height of the designed waterline according to the requirement of improving the wave resistance, the rapidity of the ship type is realized, and the wave resistance of the ship type with the small waterplane is also considered. In practical application, the depth of the indent can be properly adjusted according to the arrangement requirement of the ship bottom cabin, so as to balance the arrangement of each functional cabin of the ship;
in the design, the round bilge middle ship 2 and the square stern 3 are adopted, so that the ship body has a larger square coefficient, larger drainage volume and buoyancy can be provided, the draft is shallow, the floating center of the ship moves backwards due to the increase of the buoyancy of the middle stern, the tail of the ship is obviously lifted during high-speed navigation, and the ship has a more stable navigation state;
the ship body in the design can obtain higher navigational speed than the ship shape of a small waterplane plane, and better wave resistance than the conventional deep V-shaped angle ship shape, and meanwhile, the design draft and high-speed navigation state of the ship are balanced, so that the safety and high-speed navigation requirements of the shoal sea area are met.
The design integrates a half-small waterplane deep V-shaped bow, a round bilge middle 2 and a square tail line shape, combines the design of a concave propeller abdication groove 10 and propeller axis angle control, and maintains the sailing state of the ship at a high sailing speed between 0.2 and 0.4 degrees of stern leaning; the ship body can simultaneously consider the routes of different navigation areas such as offshore shoal, coastal, offshore navigation areas and the like, can meet various operation demands, can ensure that the propeller 4 does not touch the bottom under the condition of 2 meters of water depth particularly at low tide level, ensures the navigation safety of shallow draft working conditions, ensures the rapidness of the ship, and improves the wave resistance, navigability and passenger comfort of the ship.
In the embodiment, the length of the wave-penetrating bow 1 is 0.1-0.2 times of the ship length;
the length of the round bilge in the ship 2 is 0.6-0.8 times of the ship length, and the width of the round bilge in the ship 2 is 0.1-0.25 times of the ship width;
the length of the square stern 3 is 0.1-0.2 times of the ship length, and the width of the square stern 3 is 0.25-0.3 times of the ship width.
In the embodiment, the bottom plate and the side plates of the round bilge boat 2 are smoothly transited through an arc, and the radius of the arc is 0.03-0.06 times of the width of the boat;
the included angle between the bottom plate and the side plate of the square stern 3 is 90-125 degrees;
the displacement of the stern linear adjustment area is increased by 1-3% compared with the round bilge type.
In this embodiment, the lower side of the upper bow 7, the upper side of the lower bow 8, and the lower side of the lower bow 8 are inclined surfaces;
the included angle between the lower side surface of the lower bow 8 and the baseline of the ship body is 35-40 degrees, and the included angle between the lower side surface of the upper bow 7 and the upper side surface of the upper bow 7 is 55-60 degrees;
compared with a vertical bow ship, the comprehensive resistance of the ship is reduced by 2-3%.
In this embodiment, the rear portion of the lower side surface of the square stern 3 is provided with a concave propeller abdicating groove 10, a propeller 4 is mounted in the middle of the propeller abdicating groove 10, the concave propeller abdicating groove 10 can ensure that the axis installation angle of the propeller is reduced, the propeller shaft of the propeller 4 is obliquely installed, the installation angle is 5-8 degrees, and the angle is smaller, so that the propeller 4 can output more thrust to the stern side, the downward propulsion loss is reduced, and the overall propulsion efficiency is higher. Meanwhile, the installation position of the propeller 4 can be effectively improved by combining a smaller installation angle with the propeller abdicating groove 10 with a concave design, so that the purpose of reducing the maximum draft of the ship is achieved.
In this embodiment, the lowest point of the blade of the propeller 4 is located below the hull baseline, the distance between the lowest point of the blade and the hull baseline is 120-150mm, and under the full-load sailing condition, the maximum draft of the propeller 4 is less than 1.3m, so that the ship completely has the foundation of safe and high-speed sailing in a shoal sea area with the water depth of 2 m.
In this embodiment, the distance between the top end of the propeller abdication groove 10 and the blade is 0.15-0.2 times of the blade diameter, and the distance between the two bottom ends of the propeller abdication groove 10 is 1.4-1.5 times of the blade diameter.
In this embodiment, the cross section of the square stern 3 is gradually changed from front to back from round bilges into turn-angle bilges, and the customized propeller abdication groove 10 is combined, so that the influence of the hull on the efficiency of the propeller 4 can be reduced to the greatest extent, the buoyancy and the displacement under the waterline are increased by the square stern 3, the ship is further lifted, the draft, the heave and the roll degree of the ship tail are reduced, better wave resistance is obtained, and the comfort of passengers is improved.
In this embodiment, as shown in fig. 7, the height of the front deck surface 5 of the hull is greater than that of the rear deck surface 6, and the elevation of the front deck surface 5 can reduce the attack of waves on the bottom of the connecting bridge 11; the front end face of the connecting bridge 11 is an inclined plane, the lower side face is a curved surface, the front end inclined plane and the bottom curved surface are combined into a streamline structural form, the flow guiding effect is better than that of a flat vertical type bow when the ship sails in the windward direction or the wave-ward direction at a high speed, the resistance is smaller, and meanwhile, the vibration caused by turbulent flow can be avoided.
In practical application, the sheet body is designed to have a waterline length of about 27.5m, the maximum draft of the flat floating state after the attachment of propeller 4, rudder blade and the like is 1.24 m, and when a real ship is in a high-speed sailing state of 24-26 knots, the actual measured stern leaning of the ship is 0.2-0.4 degree (the maximum bow stern draft difference is-0.2 m), so that under the full-load sailing working condition, the floating center of the ship body is backward in the ship, and the maximum draft of the propeller 4 is less than 1.4m after the stern leaning influence of the ship is considered, so that the ship completely has the capability of safe and high-speed sailing in a shallow sea area with the water depth of 2 m.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters refer to like items and, thus, once an item is defined, no further discussion thereof is necessary in the following.
In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the indicated azimuth or positional relationships, merely for convenience of describing the present application and simplifying the description, and without being stated to the contrary, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe spatial positional relationships of features. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted.
In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.
If the application discloses or relates to components or structures that are fixedly connected to each other, then unless otherwise stated, the fixedly connected structure is understood as: a detachable fixed connection (e.g. using a bolt or screw connection) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
While the foregoing is directed to the preferred embodiment, other and further embodiments of the invention will be apparent to those skilled in the art from the following description, wherein the invention is described, by way of illustration and example only, and it is intended that the invention not be limited to the specific embodiments illustrated and described, but that the invention is to be limited to the specific embodiments illustrated and described.

Claims (10)

1. The shallow draft high-speed catamaran comprises a hull, wherein the hull comprises two sheet bodies which are symmetrically arranged left and right, and the two sheet bodies are connected through a connecting bridge;
the method is characterized in that:
the sheet body comprises a wave penetrating bow, a round bilge middle ship and a square stern which are connected in sequence in a smooth transition mode;
the bottom surface of the wave penetrating bow is in a deep V-shaped line shape, and the front end of the wave penetrating bow comprises a pointed upper bow and a pointed lower bow;
the cross section area of the wave-penetrating bow is gradually increased from front to back;
the left side and the right side of the front part of the sheet body are provided with concave half-small waterline molded surfaces, and the depth of the concave is gradually reduced from front to back;
the half-minor waterline profile is located at the designed waterline height of the ship body.
2. Shallow draft high speed catamaran according to claim 1, wherein: the length of the wave penetrating bow is 0.1-0.2 times of the ship length;
the length of the round bilge ship is 0.6-0.8 times of the ship length, and the width of the round bilge ship is 0.1-0.25 times of the ship width;
the length of the square stern is 0.1-0.2 times of the ship length, and the width of the square stern is 0.25-0.3 times of the ship width.
3. Shallow draft high speed catamaran according to claim 2, wherein: the bottom plate and the side plates in the round bilge ship are smoothly transited through an arc, and the radius of the arc is 0.03-0.06 times of the width of the ship;
the included angle between the bottom plate and the side plate of the square stern is 90-125 degrees.
4. Shallow draft high speed catamaran according to claim 1, wherein: the lower side surface of the upper bow, the upper side surface of the lower bow and the lower side surface of the lower bow are inclined surfaces;
the included angle between the lower side surface of the lower bow and the baseline of the ship body is 35-40 degrees, and the included angle between the lower side surface of the upper bow and the upper side surface of the upper bow is 55-60 degrees.
5. Shallow draft high speed catamaran according to claim 1, wherein: the cross section of the square stern is gradually changed from the round bilges to the turn-around bilges from front to back.
6. The shallow draft high speed catamaran of claim 5, wherein: the rear part of the lower side surface of the square stern is provided with a concave screw abdication groove, and a screw is arranged in the middle of the screw abdication groove.
7. The shallow draft high speed catamaran of claim 6, wherein: the propeller shaft of the propeller is obliquely arranged, and the installation angle is 5-8 degrees.
8. The shallow draft high speed catamaran of claim 7, wherein: the lowest point of the propeller blade is located below the ship body baseline, and the distance between the lowest point of the propeller blade and the ship body baseline is 120-150mm.
9. The shallow draft high speed catamaran of claim 7, wherein: the distance between the top end of the propeller abdication groove and the blade is 0.15-0.2 times of the diameter of the blade, and the distance between the two bottom ends of the propeller abdication groove is 1.4-1.5 times of the diameter of the blade.
10. Shallow draft high speed catamaran according to any one of claims 1 to 9, wherein: the height of the front deck surface of the ship body is larger than that of the rear deck surface, the front end surface of the connecting bridge is an inclined surface, and the lower side surface of the connecting bridge is a curved surface.
CN202310129197.8A 2023-02-17 2023-02-17 Shallow draft high-speed catamaran Pending CN116476970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310129197.8A CN116476970A (en) 2023-02-17 2023-02-17 Shallow draft high-speed catamaran

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310129197.8A CN116476970A (en) 2023-02-17 2023-02-17 Shallow draft high-speed catamaran

Publications (1)

Publication Number Publication Date
CN116476970A true CN116476970A (en) 2023-07-25

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CN202310129197.8A Pending CN116476970A (en) 2023-02-17 2023-02-17 Shallow draft high-speed catamaran

Country Status (1)

Country Link
CN (1) CN116476970A (en)

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