CN115503869A

CN115503869A - Catamaran with hull and deep V-fold angle semi-small waterplane area

Info

Publication number: CN115503869A
Application number: CN202211115239.4A
Authority: CN
Inventors: 林纯鑫; 李炎锋; 刘旭
Original assignee: Afai Southern Shipyard Panyu Guangzhou Ltd
Current assignee: Afai Southern Shipyard Panyu Guangzhou Ltd
Priority date: 2021-09-18
Filing date: 2022-09-14
Publication date: 2022-12-23
Also published as: CN219077412U; CN113734349A

Abstract

The invention discloses a catamaran with a hull and a deep V-fold angle semi-small waterplane area, and belongs to the technical field of ships. The ship body comprises a first submerged body, a second submerged body, a first anti-rolling bilge keel, a second anti-rolling bilge keel, a first solid wood structure, a second solid wood structure and a V-shaped structure, wherein the longitudinal cross-sectional shapes of the bottoms of the first submerged body and the second submerged body are both V-shaped structures. Two included angle edges of the V-shaped structure are flat plate line type, so that the wave making resistance is small, and the fast navigation of the ship is facilitated; the comprehensive reaction force of the first anti-rolling bilge keel and the second anti-rolling bilge keel forces the ship body to be righted and upright, so that the wind and wave resistance of the ship body is enhanced, and the wave resistance, the navigability and the riding comfort of the ship are improved; a propeller tunnel is formed between the bottom of the stern of the ship body and the tail of the stiff wood structure, so that the ship body has soft beach sitting capability when a tide returns, and the propeller and the rudder blade are protected.

Description

Catamaran with hull and deep V-fold angle semi-small waterplane area

Technical Field

The invention relates to the technical field of ships, in particular to a catamaran with a hull and a deep V-fold angle semi-small waterplane area.

Background

With the rapid development of offshore wind power construction, the accumulated installed amount is increased year by year, the scale, the yield and the offshore transportation demand are rapidly increased from the beginning offshore wind power plant to the offshore wind power plant, and the offshore wind power operation and maintenance ship is also rapidly developed. But the existing ship type can not completely meet the requirements of offshore wind farm developers owners and operators are increasingly demanding in operation and maintenance for newly built wind farms.

The development of domestic wind power operation and maintenance ships is rapid. From simple speed boats, traffic boats, tugboats adopted very near shore, to a special single steel operation and maintenance ship and then to a special high-speed aluminum alloy twin-hull operation and maintenance ship. However, in the prior art, a low-speed steel maintenance ship is mainly used, the speed is about 10 knots, and a high-speed catamaran aluminum alloy maintenance ship is shown in fig. 1, although the speed of the submergence body at the bottom of the ship body is continuously developed to a high speed state of about 25 knots by a composite body formed by an inclined plate 200 and an outward convex arc-shaped plate 100, the high wave resistance of the maintenance ship for conveying personnel on the whole is about 2 meters, and the maintenance ship is still in a coastal and offshore ship type technical state.

The ship at the present stage has low navigational speed, small wind and wave resistance and poor riding comfort for passengers, so that passengers are easy to seasick, and partial ship types have no beach capability.

Therefore, it is desirable to provide a catamaran with a hull and a deep V-break semi-small waterplane area to solve the above problems.

Disclosure of Invention

The invention aims to provide a catamaran with a hull and a deep V-fold angle semi-small waterplane area, the wind wave resistance of the ship is enhanced, and the wave resistance, the seaworthiness and the riding comfort are improved.

In order to realize the purpose, the following technical scheme is provided:

a hull, comprising:

a bi-lamellar body comprising a first submerged body and a second submerged body, the bottom longitudinal section shapes of the first submerged body and the second submerged body are both V-shaped structures;

the first stabilizing bilge keel is convexly arranged on one side, away from the second submerged body, of the first submerged body, and extends along the length direction of the first submerged body;

the second submerged body is provided with a second anti-rolling bilge keel in a protruding mode, and one side, far away from the first submerged body, of the second submerged body extends along the length direction of the second submerged body;

the first anti-rolling bilge keel and the second anti-rolling bilge keel are positioned at the same height and are bilaterally symmetrical relative to the ship body;

the bottom of the first submergence body is provided with a first solid wood structure, and the first solid wood structure extends along the length direction of the first submergence body;

the bottom of the second submersible body is provided with a second solid wood structure which extends along the length direction of the second submersible body.

As an alternative of the ship body, at the position of the ship bow of the ship body, the longitudinal cross-sectional shapes of the tops of the first submerged body and the second submerged body are both of an inward concave arc-shaped structure, and the first anti-rolling bilge keels and the second anti-rolling bilge keels are both arranged at the deep V-fold lines of the inward concave arc-shaped structure and the V-shaped structure.

As an alternative of the ship body, the included angle between the concave arc-shaped structure and the deep V-shaped break line of the V-shaped structure is gradually reduced from the bow to the stern along the length direction of the ship body, and the concave depth of the concave arc-shaped structure is gradually reduced.

As an alternative of the ship body, one side of the first submerged body, which is close to the second submerged body, is also provided with the first stabilization bilge keel, and one side of the second submerged body, which is close to the first submerged body, is also provided with a second anti-rolling bilge keel.

As the alternative of hull, first stiff wood structure includes first portion, middle installation department and second portion, the middle installation department is used for installing propeller blade, first portion with the equal symmetry in left and right sides of second portion is provided with the indent guiding gutter, the water conservancy diversion direction of indent guiding gutter is just right propeller blade.

As an alternative to the hull, the width of the smallest narrow face of the first and second portions is each one half of the width of the intermediate mounting portion.

As an alternative of the ship body, a blade avoiding concave surface is concavely arranged at the bottom of the stern of the ship body.

As an alternative of the ship body, a distance L1 between two points CD of the blade avoiding concave profile is 1.3 times the diameter of the propeller blade, and a distance L2 between two points GH between the blade tip of the propeller blade and the vertex of the blade avoiding concave profile is not less than 0.2 times the diameter of the propeller blade.

As an alternative to the hull, the angle E between the forward end of the bow of the hull and the forward deck surface is 90 degrees.

The deep V-fold angle semi-small waterplane catamaran comprises operation and maintenance equipment and the catamaran body as described in any one of the above, wherein the operation and maintenance equipment is arranged on the catamaran body, and the catamaran body is a square stern.

Compared with the prior art, the invention has the beneficial effects that:

the ship body provided by the invention has the advantages that the bottoms of the first submerged body and the second submerged body of the double-piece body are both arranged into a V-shaped structure, two included angle edges of the V-shaped structure are of a flat line type, the ship body obtains proper stable force in the navigation process, particularly in a high navigation speed state of not less than 25 knots, the wave making resistance is small, and the fast navigation of the ship is facilitated; the side, far away from the second submerged body, of the first submerged body is provided with a first anti-rolling bilge keel, the side, far away from the first submerged body, of the second submerged body is provided with a second anti-rolling bilge keel, the first anti-rolling bilge keel and the second anti-rolling bilge keel are located at the same height and are bilaterally symmetrical relative to the ship body, more parts of the ship body are immersed into water along with the pitching and rolling of the ship, the comprehensive reaction force of the first anti-rolling bilge keel and the second anti-rolling bilge keel forces the ship body to be rightly and vertically erected, the wind and wave resistance of the ship body is enhanced, and the wave resistance, the navigability and the riding comfort of the ship are improved; a stiff wood structure is arranged at the bottom of the submerged body, a propeller tunnel is formed between the bottom of the stern of the ship body and the tail of the stiff wood structure, and the ship body has soft beach sitting capability when the tide returns to protect a propeller and rudder blades; the solid wood structure extends along the length direction of the first submerged body, so that the flow resistance generated by additionally arranging the solid wood structure is reduced, and the improvement of the ship speed is facilitated.

According to the deep V-break angle semi-small waterplane catamaran, more hull parts are immersed into water along with the pitching and rolling of the ship, the comprehensive reaction force of the first anti-rolling bilge keel and the second anti-rolling bilge keel forces the hull to be righted and upright, the wind and wave resistance is high, and the wave resistance, the navigability and the driving comfort of the ship are improved; two included angle edges of the V-shaped structure are flat line type, so that the ship body obtains proper stable force in the navigation process, and particularly has small wave making resistance in a high navigation speed state of not less than 25 knots, thereby being beneficial to the rapid navigation of the ship; the bottom of the submerged body is provided with a solid wood structure, so that a propeller tunnel is formed between the submerged water body at the tail part and the solid wood structure, and the ship body has soft beach sitting capability during the ebb tide, thereby protecting the propeller and rudder blades and considering the use of the near shore shoal.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art submerged body;

FIG. 2 is a schematic view of the structure of a first perspective of a hull of an embodiment of the invention (propeller blades not shown);

FIG. 3 is a top view of a hull in an embodiment of the invention;

FIG. 4 is an elevation view of a hull in an embodiment of the invention;

FIG. 5 is a line drawing of a composite shape of a V-shaped structure and an inward concave circular arc structure of a ship body in an embodiment of the invention;

FIG. 6 is a schematic structural view of a second perspective of a hull of an embodiment of the invention (propeller blades not shown);

FIG. 7 is a schematic structural view of a third perspective of a hull of an embodiment of the invention (propeller blades not shown);

FIG. 8 shows a first embodiment of the present invention a cross-sectional view of the solid wood tail;

FIG. 9 is a fourth perspective structural view of the hull of the embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 9 at B;

FIG. 11 is a rear view of the hull of the embodiment of the present invention;

FIG. 12 is an enlarged view of a portion of FIG. 11 at A;

FIG. 13 is a schematic structural view of a fifth perspective of a hull of an embodiment of the invention (propeller blades not shown);

fig. 14 is a schematic structural view of a square stern in the embodiment of the invention.

Reference numerals:

100. arc-shaped plate (ii) a; 200. an inclined plate;

1. a double-sheet body; 2. a first stabilizing bilge keel; 3. a second stabilizing bilge keel; 4. a first solid wood structure; 5. a second solid wood structure; 6. a propeller tunnel; 7. a V-shaped structure; 8. an inwards concave circular arc structure; 9. deep V a corner line; 10. a propeller blade; 20. a stern shaft tube; 30. a stern shaft;

11. first lower a latent body; 12. a second submerged body; 13. a bow; 131. a front deck face; 14. a stern; 141. a rear deck surface; 15. the paddle avoids the concave surface.

41. A first part; 42. an intermediate mounting portion; 43. a second section; 44. an inner concave diversion trench.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

With the rapid development of domestic offshore wind power construction, the accumulated installed amount is increased year by year, from the beginning coastal and offshore wind power field to the offshore wind power, the scale, the yield and the offshore transportation demand are rapidly increased, the offshore wind power supporting ship is also rapidly developed, but the existing ship type can not completely meet the increasing operation and maintenance demands of offshore wind power field developers, owners and operators for newly built wind power fields.

The development of domestic wind power operation and maintenance ships can be said to be full of flowers and eight flowers, and the overall development trend is very rapid. From simple yachts, traffic boats and tugboats which are adopted very near the shore to special single steel operation and maintenance ships and then to professional high-speed aluminum alloy catamaran operation and maintenance ships, the current market still has a composite development situation, various ship types are used, but the steel low-speed operation and maintenance ships are mainly used, the navigation speed is about 10 knots, and the high-speed catamaran operation and maintenance ships have been developed to a high navigation speed state of about 25 knots, but the wave-resistant high capacity of the operation and maintenance ships for conveying personnel is about 2 meters on the whole, and still are in a technical state of coastal near-shore ship types. In order to meet the use requirements of high sea conditions in coastal and near sea areas, on the premise of maintaining better rapidity, the ship also needs to have better wind wave resistance and passenger comfort, reduce the seasickness rate of passengers, simultaneously have certain beach capacity to consider the use of near shore shoals, and have the feasibility of a construction process

In order to consider rapidity, wave resistance, operability and comfort as an integral marine wind power operation and maintenance catamaran, which is applicable to marine wind power operation and maintenance catamarans in coastal shoals, coastal areas and offshore navigation areas, and particularly to a high-performance marine wind power operation and maintenance catamaran for offshore remote wind farms, the embodiment provides a catamaran with a deep V-break angle and a semi-small water plane, and specific contents of the embodiment are described in detail with reference to fig. 2 to 14.

As shown in fig. 2 to 7, the hull comprises a double-body 1, a first turn-reducing bilge keel 2, a second turn-reducing bilge keel 3, a first solid wood structure 4, a second solid wood structure 5 and a V-shaped structure 7. The biplate 1 comprises a first submerged body 11 and a second submerged body 12, and the bottom longitudinal cross-sectional shapes of the first submerged body 11 and the second submerged body 12 are both V-shaped structures 7. The first anti-rolling bilge keel 2 is convexly arranged on one side, away from the second submerged body 12, of the first submerged body 11, and the first anti-rolling bilge keel 2 extends along the length direction of the first submerged body 11. And a second anti-rolling bilge keel 3 is convexly arranged on one side of the second lower submerged body 12 far away from the first lower submerged body 11, and the second anti-rolling bilge keel 3 extends along the length direction of the second lower submerged body 12. The first anti-rolling bilge keel 2 and the second anti-rolling bilge keel 3 are positioned at the same height and are symmetrical left and right relative to the ship body. The bottom of the first submerged body 11 is provided with a first solid wood structure 4, which first solid wood structure 4 extends in the length direction of the first submerged body 11. The bottom of the second submersible body 12 is provided with a second solid wood structure 5, the second solid wood structure 5 extending in the length direction of the second submersible body 12.

In short, the ship body provided by the invention has the advantages that the bottoms of the first submerged body and the second submerged body of the double-sheet body 1 are both arranged into a V-shaped structure, and two included angle edges of the V-shaped structure are flat line type, so that the ship body obtains proper stable force in the navigation process, particularly a high navigation speed state of not less than 25 knots, the wave making resistance is small, and the ship body is favorable for fast navigation; the side, far away from the second submerged body, of the first submerged body is provided with a first anti-rolling bilge keel, the side, far away from the first submerged body, of the second submerged body is provided with a second anti-rolling bilge keel, the first anti-rolling bilge keel and the second anti-rolling bilge keel are located at the same height and are bilaterally symmetrical relative to the ship body, more parts of the ship body are immersed into water along with the pitching and rolling of the ship, the comprehensive reaction force of the first anti-rolling bilge keel and the second anti-rolling bilge keel forces the ship body to be rightly and vertically erected, the wind and wave resistance of the ship body is enhanced, and the wave resistance, the navigability and the riding comfort of the ship are improved; a stiff wood structure is arranged at the bottom of the submersible body, a propeller tunnel 6 is formed between the bottom of the stern of the ship body and the tail of the stiff wood structure, and the ship body has soft beach sitting capability when the tide is reduced, so that a propeller and rudder blades are protected; the solid wood structure extends along the length direction of the first submerged body, so that the flow resistance generated by additionally arranging the solid wood structure is reduced, and the ship speed is favorably improved.

Specifically, as shown in fig. 2, in this embodiment, the bow of the hull includes a pointed portion at the front end of the submerged body, and the pointed portion breaks forward to separate the seawater, so that the seawater can flow through the submerged body quickly from the left and right sides of the submerged body.

Further, as shown in fig. 4 and 5, at the bow of the ship body, the top longitudinal cross-sectional shapes of the first submerged body 11 and the second submerged body 12 are both concave arc structures 8, and the first stabilization bilge keels 2 and the second stabilization bilge keels 3 are both arranged at the deep V-fold lines 9 of the concave arc structures 8 and the V-shaped structures 7. Specifically, at the middle front part of the deep V hull, near the design waterline height, according to the need of improving the wave resistance, the concave arc structure 8 (concave semi-small waterplane line type) is provided, so that the ship type has the wave resistance of the small waterplane ship type, and the rapidity of the deep V ship type is also considered, and the ship type is a composite line type of the deep V ship type and the small waterplane ship type.

Understandably, the depth of the inner recess arc-shaped structure 8 can be properly adjusted according to the arrangement requirement of the ship bottom bin, so that the arrangement function of the ship is balanced, the ship can obtain higher navigational speed than a small waterplane ship type, and the wave resistance of the ship is better than that of a conventional deep V-folded angle ship type.

Specifically, as shown in fig. 5 in combination with fig. 6, in the present embodiment, the included angle between the concave circular arc-shaped structure 8 and the deep V-fold line 9 of the V-shaped structure 7 gradually decreases from the bow 13 to the stern 14 of the ship body along the length direction of the ship body, and the concave depth of the concave circular arc-shaped structure 8 gradually decreases. In particular, as shown in fig. 6, the concave depth of the concave circular arc structure 8 near the stern 14 is zero.

As shown in fig. 2, the height of the front deck surface 131 is greater than the height of the rear deck surface 141. The front deck surface 131 of the bow 13 rises, the impact of waves on the bottom of the connecting bridge is reduced, and the capability of safely abutting against a fan foundation pile under the condition of 2.5m sea waves is achieved.

Further, as shown in fig. 13, an angle E between the front end of the bow 13 of the hull and the front deck surface 131 is 90 degrees. The bow 13 of the ship body is designed to be vertical, and the waterline is designed to be longer than the oblique bow under the condition of the same deck length, so that the waterline plane water entry angle is reduced, the wave making resistance in high-speed navigation of the ship is reduced, the longitudinal volume is increased, the buoyancy reserve distribution is more reasonable, and the navigation state is more stable.

The ship type of the invention integrates a deep V-shaped break line 9, a bow 13 with a half small water line surface (namely, a vertical bow 13 with an internal concave arc-shaped structure 8), a square stern line type, designs such as an internal and external anti-rolling bilge keel of a double-piece body 1, a stiff wood structure at the tail part, an internal concave propeller tunnel 6 and the like, ensures the rapidity of the ship, improves the wave resistance, the navigability and the passenger comfort of the ship, protects the propeller, can adapt to shallow water, has the beach sitting capability, can simultaneously consider the routes of different navigation areas such as a near shore shallow beach, a coastal navigation area and an offshore navigation area and the like, and meets the requirement of high sea operation and maintenance operation for the rapid development of offshore construction.

Further, as shown in fig. 4, the first bilge keel 2 is also provided on the side of the first submersible 11 close to the second submersible 12, and the second bilge keel 3 is also provided on the side of the second submersible 12 close to the first submersible 11. That is, the first bilge keels 2 are provided on both the inner and outer sides of the first submerged body 11, and the second bilge keels 3 are provided on both the inner and outer sides of the second submerged body 12. The inner sides and the outer sides of the first submerged body 11 and the second submerged body 12 are both provided with anti-rolling bilge keels, so that the comprehensive reaction force is further increased, and the wave resistance and the driving comfort of the ship body are improved.

Specifically, the first and

second bilge keels

2 and 3 are located at the middle-aft portion of the entire hull.

Further, the first and second

anti-rolling bilge keels

2 and 3 are both of a dog-ear structure. Specifically, the first and second

stabilization bilge keels

2 and 3 are long-strip plate-shaped structures, the first stabilization bilge keel 2 is arranged at an included angle with the surface of the first submersible body 11, and the second stabilization bilge keel 3 is arranged at an included angle with the surface of the first submersible body 11.

In other embodiments, the first and

second bilge keels

2 and 3 are both arc-shaped. The circular arc structure here includes a circle or an ellipse.

Further, as shown in fig. 7 and 8, the first solid wood structure 4 includes a first portion 41, an intermediate mounting portion 42 and a second portion 43, the intermediate mounting portion 42 is used for mounting the propeller blade 10, both left and right sides of the first portion 41 and the second portion 43 are symmetrically provided with inner concave guiding grooves 44, and a guiding direction of the inner concave guiding grooves 44 is opposite to the propeller blade 10. Specifically, the diversion height of the concave diversion trench 44 is over against one half of the radius of the propeller blade 10, so that the seawater is conveniently and directly diverted to the main rotating part of the propeller blade 10, and the thrust of the propeller blade 10 to the ship body is increased.

Specifically, as shown in fig. 9 and 10, the first portion 41 and the second portion 43 both indent a certain depth toward the stem 13 of the hull, the middle mounting portion 42 is embedded with a stern tube 20, the stern shaft 30 is rotatably disposed in the stern tube 20, one end of the stern shaft 30 is in transmission connection with an engine inside the hull, and the other end of the stern shaft 30 is provided with a propeller blade 10.

Further, as shown in fig. 8 to 13, the widths of the minimum narrow surfaces of the first portion 41 and the second portion 43 are both half of the width of the intermediate mounting portion 42, which is beneficial to smooth the incoming flow of the propeller blade 10 and improve the propulsion efficiency of the propeller blade 10.

As shown in fig. 10 to 12, further, a blade avoiding concave surface 15 is recessed in the bottom of the stern 14 of the ship body. Specifically, a distance L1 between two points CD where a line shape of the blade avoiding concave surface 15 intersects with a line shape of the ship bottom is set to be 1.3 times the diameter of the propeller blade 10, and a distance L2 between two points GH between a blade tip of the propeller blade 10 and a vertex of the blade avoiding concave surface 15 is not less than 0.2 times the diameter of the propeller blade 10. The blade avoiding concave surface 15 is arranged in an ellipse-like line shape. The concave blade avoiding surface 15 with the concave design can ensure that the installation angle of the axis of the stern shaft 30 can be reduced, so that the screw blades 10 have higher efficiency and effective thrust, and the line type of the propeller tunnel 6 containing the structural shape has more favorable wave resistance compared with the line type of the conventional round bilge type ship bottom.

The embodiment also provides a deep V-break half small waterplane area catamaran, which comprises operation and maintenance equipment and the above-mentioned hull, wherein the operation and maintenance equipment is arranged on the hull, and the hull is a square stern. Specifically, as shown in fig. 13 and 14, an angle F between the rear end of the stern 14 of the hull and the rear deck surface 141 is 90 degrees, and the rear deck surface 141 is square as a whole in plan view. The stern 14 adopts a square stern, and is combined with the customized propeller tunnel 6 and the stiff wood, so that the influence of the ship body on the efficiency of the propeller is reduced to the maximum extent, and the buoyancy and the displacement under a waterline are increased by the square stern, so that the heave and roll degree of the ship are reduced, better wave resistance is obtained, and the comfort of passengers is improved.

To sum up, the working principle of the ship type is as follows: the ship is in a deep V-folded angle shape, the ship body can obtain stabilizing force and minimum swing during sailing, small and half waterplane surface design is adopted at the middle front part of the plate body, and anti-swing bilge keels are arranged on the inner side and the outer side of the middle tail part of the plate body.

The technical effect of this ship type: 1. the technology improves the comprehensive wave resistance of the ship, reduces the seasickness rate and improves the riding comfort of passengers; 2. the technology reduces the ship resistance, improves the navigational speed, reduces the oil consumption, improves the economy of the ship and prolongs the service life of the main engine; 3. the technical stay wood design has the tidal zone soft beach setting capability and protects the propeller blade 10; 4. according to the propeller tunnel 6 design, the blades are hidden, so that the efficiency is improved, and the maximum draught of the ship is reduced; 5. the technology has low implementation material cost: the same material of the ship is used and is completely integrated into the ship construction process, and maintenance is not needed after installation.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.

Claims

1. A hull, characterized in that it comprises:

-a biplate (1) comprising a first submerged body (11) and a second submerged body (12), the bottom longitudinal section shapes of the first submerged body (11) and the second submerged body (12) being both V-shaped structures (7);

the first stabilizing bilge keel (2) is convexly arranged on one side, away from the second submerged body (12), of the first submerged body (11), and the first stabilizing bilge keel (2) extends along the length direction of the first submerged body (11);

the second stabilizing bilge keel (3) is convexly arranged on one side, away from the first submerged body (11), of the second submerged body (12), and the second stabilizing bilge keel (3) extends along the length direction of the second submerged body (12);

the first anti-rolling bilge keel (2) and the second anti-rolling bilge keel (3) are positioned at the same height and are bilaterally symmetrical relative to the ship body;

the bottom of the first submerged body (11) is provided with a first solid wood structure (4), and the first solid wood structure (4) extends along the length direction of the first submerged body (11);

the bottom of the second submerged body (12) is provided with a second solid wood structure (5), and the second solid wood structure (5) extends along the length direction of the second submerged body (12).

2. The hull according to claim 1, characterized in that at the bow (13) of said hull, the top longitudinal cross-sectional shapes of said first submerged body (11) and said second submerged body (12) are both concave circular arc structures (8), and said first bilge keels (2) and said second bilge keels (3) are both arranged at the deep V-break lines (9) of said concave circular arc structures (8) and said V-shaped structures (7).

3. The hull according to claim 2, characterized in that the angle between said concave circular arc shaped structure (8) and the deep V-fold line (9) of said V-shaped structure (7) decreases gradually from bow (13) to stern (14) along the length of said hull, and the concave depth of said concave circular arc shaped structure (8) decreases gradually.

4. The hull according to claim 3, characterized in that the side of said first submerged body (11) close to said second submerged body (12) is also provided with said first stabilization bilge keels (2) and the side of said second submerged body (12) close to said first submerged body (11) is also provided with said second stabilization bilge keels (3).

5. The hull according to any one of claims 1-4, characterized in that said first stiff structure (4) comprises a first portion (41), an intermediate mounting portion (42) and a second portion (43), said intermediate mounting portion (42) being adapted to mount a propeller blade (10), said first portion (41) and said second portion (43) being symmetrically provided with inwardly concave flow channels (44) on both the left and right sides, the flow direction of said inwardly concave flow channels (44) facing said propeller blade (10).

6. The hull according to claim 5, characterised in that the width of the smallest narrow faces of said first and second portions (41, 43) is each half the width of said intermediate mounting portion (42).

7. The hull according to claim 5, characterized in that the bottom of the stern (14) of the hull is recessed with a blade evasion concave profile (15).

8. The hull according to claim 6, characterized in that the distance L1 between two points CD of the blade avoiding concave profile (15) is 1.3 times the diameter of the propeller blade (10), and the distance L2 between two points GH between the tip of the propeller blade (10) and the apex of the blade avoiding concave profile (15) is not less than 0.2 times the diameter of the propeller blade (10).

9. The hull according to claim 5, characterised in that the angle E between the forward end of the bow (13) of the hull and the forward deck surface (131) is 90 degrees.

10. A deep V-break semi-small waterplane catamaran comprising an operation and maintenance device and a hull according to any one of claims 1 to 9, said operation and maintenance device being disposed on said hull, said hull being a square stern.