JPH0539081A - Ship having single front hull and double rear hull - Google Patents

Abstract

PURPOSE: To improve safety in stormy weather and to reduce fuel costs by forming a tunnel between two hulls and providing a structure in which the two hulls are connected in deck areas extending between the tunnel and over the tunnel, in a hull having a single-foredeck hull and a double-sterndeck hull. CONSTITUTION: A hull 10 has a single-foredeck hull 12 and a double-sterndecks hull 18. The foredeck hull 12 covers the area ranging from the bow 14 of the hull 10 to the midway region 16, while the remaining area of the vessel 10 is the double-sterndecks hull 18 which extends moderately from the foredeck hull 12 to the individual stern areas 20, 22 of the double-sterndecks hull 18. A tunnel 24 is formed between the individual stern areas 20, 22 of the double- sterndecks hull 18. In the stopped situation of the hull, virtually entire areas of the tunnel 24 is sunk in the water. Each of the stern areas 20, 22 of the double-sterndecks hull 18 has a side wall 26 which is vertical, but slightly inclines towards inside from the outside, a keel wall 27 which goes downward moderately from the side wall 26 and extends horizontally, and an inside wall 29 which face the tunnel 24. The inside wall 29 has a step 32 inclined towards the midway region 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship hull, and more particularly to a hull having a single-hull front hull and a double-hull rear hull.

[0002]

BACKGROUND OF THE INVENTION Virtually all traditional ship and boat hulls have a so-called monohull profile. The term "single body" means a hull consisting of a single body structure. Typically, the hull is narrowed in its cross section towards the beginning to define a sharp bow that facilitates the ship's ability to effectively drain water. However, the hull is otherwise relatively wide, and a significant portion of it is always submerged. This makes the monohull structure resistant and more stable in rough seas. However, since most of the monohulls are always submerged in water, the monohull creates more resistance under high speed conditions, which is the resistance to movement, and as a result the maximum speed of the ship is limited and / or
Or a more powerful engine is needed.

Catamaran is a type of ship with different hulls known for many years to reduce drag and consequently speed up the ship or boat. The hull of a catamaran comprises a pair of relatively narrow and long hulls. Catamaran hulls are laterally separated and are typically held to each other by decks or superstructures of ships.

By providing the benefits of reduced drag with catamaran, it is possible to achieve speeds not possible with monohulls and / or to install low power and thus cheap engines on catamaran. To do. However, as is known to those in the shipping industry, catamaran has the serious drawback of not being very stable in rough seas, and the hull in front of it underwater in the presence of a large oncoming wave. It has a tendency to be buried, resulting in a "push" condition at the front end of the hull and flipping the ship in the opposite direction.

[0005]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a ship or boat hull which enjoys the advantages of monohull and catamaran and avoids the disadvantages of both.

It is a further object of the present invention to provide a hull that improves the performance of the ship in both calm and stormy seas.

Another object of the present invention is a hull comprising a single-hull front hull and a double-hull aft hull in an arrangement and profile in which the ship's loads are substantially transferred onto the aft hull. To provide.

Yet another object of the present invention is to provide a ship or boat having a hull that consumes less fuel when traveling over water than a monohull.

[0009]

The above and other objects of the present invention provide two single-body front hulls and twin-hull rear hulls shaped to lift above water when the ship is accelerated. It is realized by the hull of a ship that includes a hull portion.
Usually, the aft hull of a catamaran comprises first and second spaced catamaran hulls. However, these hulls are, in accordance with the teachings of the present invention, where they smoothly extend from the rear end of the monohull and define the tunnel between them, and in a sense are fully connected by the front hull of the monohull. There is something.

In addition to its normal function of providing space for living and luggage, the deck of a ship or its superstructure is in the context of the present invention a catamaran that connects and separates catamaran hulls from one another. It covers the tunnel between the hulls. Further in accordance with the invention, the aft hull of a catamaran is constructed and sized to carry and support a major portion and preferably substantially all of the equipment the vessel is intended to carry. ing.

Monohulls are raised above water at relatively high speeds as seen in racing boats. The present invention is designed to take advantage of this effect by taking into account the ship loads transferred to the aft hull of a catamaran at higher speeds and the easier lifting of monohulls on water.
In this way, a monohull front hull will have less effect when the ship is faster and greater effect when the ship is slower. Therefore, according to the present invention, it is possible to cruise faster and more smoothly even in rough seas, and to achieve speeds that were impossible with a single hull alone. Also, the hull of the invention requires less power to travel over water than a monohull, and ships with the hull of the invention can be operated more effectively and / or be smaller and therefore economical. It becomes possible to equip it with various engines.

According to a salient feature of the invention, the discharge member is arranged in the tunnel between the catamaran hulls, preferably in the border region where the front hull of the monohull and the aft hull of the catamaran meet each other. ing. The drainage member preferably extends from the lowest or deepest position of the boundary region to a position on the hull or above the ship which is always above the water. The tendency to develop decompression within the first submerged tunnel when the monohull front hull begins to lift is effectively hampered as a result of constant evacuation of the tunnel through the evacuation member.

According to a preferred embodiment of the present invention, the front hull of a single shell is approximately equal to the length of the rear hull of a catamaran. Furthermore, it is preferable that the single body includes a plurality of spines on its outer surface. These spines provide lift as well as pushing water aside, which is applied to the front hull of a monohull and prevent or at least reduce unnecessary and unwanted splashing.

Other features and advantages of the present invention will become apparent in the detailed description of the invention including the following drawings.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, the hull 1 of a ship according to the present invention
0 comprises a single-hull front hull 12 and a double-hull rear hull 18. The single-hull front hull 12 extends from the bow 14 of the hull 10 to approximately its middle region 16, with the remainder of the hull 10 extending from the single-hull front hull 12 to each hull (20 and 2).
2) Rear hull 1 of the catamaran that extends smoothly to the rear
Contains eight.

Since the drawings presented are for the hull 10 only, a complete constructed boat or ship having the novel hull 10 of the present invention provides a living or luggage compartment or space (not shown). It can be seen that it also has a deck (not shown) or superstructure for it. A ship depicted to enjoy the benefits of hull 10 has a tunnel 24 between catamaran hulls 20 and 22 covered by a deck as described below, and in addition the aft hull 18 of the catamaran is It is also contemplated to have a size and drainage capacity that can support the load.

Under normal conditions, in a ship at rest most of the tunnel 24, if not most, will be submerged. This characteristic is due to the front hull 12 of the monohull and the rear 1 of the catamaran.
It is important to recognize the meaning that the ejection member 34, which is arranged in the intermediate region between 8, is drawn.

FIG. 2 is a transverse cross-sectional view of the rear hull 18 of the catamaran at the position of the arrow 2-2, showing the hulls 20 and 2 of the catamaran.
Each of the two is a wall 26 that is vertical but slightly inward on the outside, a keel wall 27 that gently descends from the side wall 26 but extends horizontally overall, and an inner wall that faces the tunnel 24. It is drawn including 29. The inner wall 29 includes a first vertical portion 28, a second vertical wall portion 30 and a step 32, which is a horizontal unit between the walls 28 and 30. Preferably the step 32 is inclined towards the intermediate region 16.

As mentioned above, the catamaran hulls 20 and 22 are generally connected to the monohull front hull 12,
So they spread out smoothly from the rear end of the single barrel. The present invention is directed to a single-hull front hull 12 and a double-hull rear hull 1.
1 shows a hull 10 of a monolithic ship comprising 8 and also illustrates that the aft hull 18 of a catamaran extends smoothly from the front hull 12 of a single hull (see the preferred embodiment detailed description). In the description). The above is the catamaran hull 20
This is reflected in FIG. 1 which shows that the outer walls 26 and 22 extend smoothly from the outer wall 26 'of the front hull.

The background structure between the catamaran hulls 20 and 22 represents the V-shaped bottom 37 of the end wall 36 of the monohull front hull 12 visible through the tunnel 24.

The propulsion engines of the hull 10 are each hull 20
And 22 aft, and may be in any suitable position on the hull 10.

The front hull 12 of the monohull is 3 on each side.
It has a pair of three vertebrae 38 and is called a "spray rail", but it constitutes a step on the surface of the hull 10 which has two functions, one of which has two functions. Provides a climb angle relative to the hull 10 when is accelerated,
However, more importantly, it has a function of pushing the water out of the hull 10 when the water is drained. This same function is also obtained from the previously mentioned inner step 32 facing the inner wall 29 on the catamaran side hulls 20 and 22 depicted in FIG.

A key advantage of the hull 10 of the present invention is that it extends at least partially close to or along the rear wall 36 of the single-hull front hull 12 and is open toward the tunnel 24. It is derived from providing a plurality of exhaust ducts 34 having exhaust duct openings. Preferably, the exhaust duct 34 provides a passageway for air from the tunnel 24 towards the deck or another position of the vessel that is always above the water, for the front of the monohull 12 and the rear of the catamaran. It extends from the lowest position of the intermediate region 16 between the hulls 18. The advantage of the discharge duct 34 derives from the fact that the monohull front hull 12 slowly emerges out of the water when the ship accelerates. This is carried in order and the rear hull of the catamaran 18
The load of the ship to be carried by the ship tilts more and more backwards, causing water levels in the tunnel 24.

However, without the exhaust duct 34, the backward tilt of the water level creates a decompression condition in the tunnel 24, which interferes with the possibility of the then monohull front hull 12 being further lifted with respect to the water. .. Providing the aforementioned exhaust duct 34 allows the monohull front hull 12 to rise unhindered, and mitigates the problem by taking into account the air flowing through the tunnel 24.

A three-dimensional coordinate system 40, written on the left side of the hull 10 of FIG. 1 is provided to facilitate understanding of FIGS. 3-5. According to the lessons of the shipbuilding industry, hull 1
The shape of 0 and its exact outline are shown in Figure 3-
It is specified in 5. The lines of such a hull have been created by plotting the surface coordinates of the hull 10 along its respective axis. For example, it is a two-dimensional coordinate axis system that is completed by the remaining two axes "y" and "z" axes, for example, the "x" axis. It corresponds to the "position line" axis, the "butt" axis and the "water line" axis. Further, in FIGS. 3-5, they are respectively labeled as buttock 42 (FIG. 3), position 44 (FIG. 4) and water line (hull height) 46 (FIG. 5).

According to FIG. 3, the hull 10 is identified by a Buttocks line 42 plotted on a two-dimensional coordinate system comprising a position line axis as the abscissa and a water line axis as the ordinate. As will be appreciated, the position line axis has the coordinates of a positive position line extending from the middle of the hull 10 toward its bow 14 or in other words along the forward hull 12 which is essentially monohull. It extends along the longitudinal direction of the hull 10. The aft hull 18 of the catamaran, on the other hand, has the coordinate values of the negative position line and is linked to Figures 3-5.

As best seen in FIG. 4, the waterline coordinate axis has its negative coordinate value displayed above the reference waterline 48 and extends along the height of the hull 10. The waterline axis has a value of 0 in the reference waterline, below which it has a positive value. The third coordinate axis extends in the width direction and is called a buttock (bat) axis.

The prototype of the present invention is the one currently drawn, but the shape to size ratio is shown in FIGS. 3-5. Therefore, the set of bat wires 42 (B-1, B- in FIG.
2, B-3, B-4 and B-5) are single-hull front hull 1
It provides information that limits the shapes of the two. For example, the bat line B-5 is almost the maximum width of the hull, which is the hull 1
Displaying those positions on the hull 10 where the surface coordinate values on 0 have a "bat" value of 5.

It can be inferred from the B-5 curve that all positions on the hull 10 located between the position line 4 and the bow 14 have a width less than 5 that has bat coordinate values. .. Peak 54 on curved line B-5
Shows the position where the frame of the hull is beginning to narrow in cross section. Similar information is included in other bat lines.
For example, the bat line B-3 is the hull 1 located at the bat value 3
The surface of 0 extends further toward the bow 14,
The fact shows that the monohull front hull 12 reflects a gradual narrowing from its middle region 16 towards its bow 14.

Single hull front hull 12 and double hull rear hull 18
The negatively sloping straight line 56, located to the left of the boundary line 58 between, is as seen from the direction of the tunnel 34, which is visible along the longitudinal centerline 50, of the monohull front hull 12. The outer shape of the end wall 36 is clarified.

Dimensional information about the previously specified step 32 formed in the inner wall 29 of the catamaran hulls 20 and 22 is provided in FIG. 3 by a pair of nearly parallel lines, including a dashed line 60 and a solid line 62. ing. In the more accurately drawn illustration, lines 60 and 62 are the boundaries 58
It is shown that the step 32 inclines upward in the height direction when approaching. In FIG. 4, the stage 32 is designated by the reference numeral 64.

Referring to FIG. 4, the right side of the figure includes a plurality of transverse position lines SL0-SL9 which, in other words, different lateral position lines, at different longitudinal positions of the hull 10. It depicts a lateral structure in a cross section located at the value of. For example, the position line SL9 essentially represents a cross section in the region of the bow 14, and the bow 14 is at a height above the surface of the water which is approximately between the waterline values -4.5 and -5.5. It is located. In the cross section at the position of position line 5 (represented by SL5), the bottom of the hull 10 is about the waterline level (WL =
0). FIG. 4 also depicts the position of the spine 38 with respect to the cross-section position line 44.

The left side of FIG. 4 depicts the lateral structure at the values of these position lines generally associated with the aft hull 18 of the catamaran. Therefore, the position lines -6, -9, -10
And AP (see FIG. 3), in FIG. 4, a catamaran hull 20 including an almost vertical wall 26, a generally horizontal bottom surface 27 and an inwardly facing sidewall 29 forming a step 32 therein. The above-mentioned wall part of is drawn.

FIG. 5 further supplements the figures presented by FIGS. 3 and 4 to clarify the shape of the hull. Therefore, in FIG. 5, the shape of the value of the water line coordinate is plotted by the two-dimensional coordinate system including the length (position line axis) and the width (butt axis) of the hull 10. Therefore, as is clear from the perspective view of the hull 10 shown in FIG. 1, all water lines are located close to each other on the sides of the hull of the aft hull 18 of the catamaran. This is because the width of the hull 10 there is essentially constant. These same lateral lines, however, show the fact that they begin to spread along the single-hull front hull 12 and gradually narrow the single-hull front hull 12 toward the bow 14. As shown in the right-hand direction of FIG.

In the particular embodiment depicted in FIGS. 3-5, the spacing of the position lines is about 5 feet and the hull length is shown to be about 120 feet.

Further, the butt line in the figure is preferably 2
At a distance of 6 inches, the water lines are 2 feet apart, and the ships constructed according to the drawings in Figure 3-5 have about 3
It is shown to be 0 feet wide and about 18 feet high.

Therefore, a ship constructed to have a hull 10 according to the present invention may be its key object.
Such a ship would have its monohull front hull 12 submerged deeper in water to provide the desired seaworthiness when operating relatively slowly during stormy weather when the sea was rough. I will dive. However, as the ship accelerates, its monohull front hull 12 is slowly lifted above the water so that it is substantially supported by the aft hull 18 of its catamaran. Therefore, at full speed, the benefits of the catamaran aft hull 18 begin to appear, reducing drag and allowing for greater thrust exerted by the engine transmitting forward speed.
A ship constructed with the hull 10 of the present invention may alternatively be fitted with a lower power and therefore more economical engine, which results in more effective navigation.

Although the present invention has been described with respect to its individual embodiments, many other embodiments and modifications and other uses contemplated by those skilled in the art are also applicable. Therefore, it is limited to the claims but not by the detailed description of the specification.

[Brief description of drawings]

FIG. 1 shows a perspective view of the hull of a ship with a single-hull front hull and a double-hull aft hull according to the invention.

FIG. 2 shows a cross-sectional view taken along the arrow 2-2 of FIG.

FIG. 3 is a side view showing the coordinate values of the surface of the hull of the present invention plotted on a two-dimensional seating table including the longitudinal and height axes of the hull of the ship.

4 is a body diagram including a lateral cross-section of the hull at the position 0 and the hull of the stern depicted in FIG. In FIG. 4, the right side is in the direction of the boat at position 0.
The left part of is the stern direction at position 0.

FIG. 5 is a diagram of the hull of the present invention in which the surface coordinate values of the hull are plotted in a coordinate system including axes in the longitudinal direction and the width direction of the hull.

[Explanation of symbols]

 10 hull 12 front hull of single body 14 bow 16 middle region 18 rear hull of catamaran 20 one side of catamaran 22 other side of catamaran 24 tunnel 26 side wall 27 keel wall 28 first vertical part 29 inner wall 30 second vertical part 32 steps 34 exhaust duct

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Thomas Y. Fexus, Southwest Dyer Point Road, Palm City, Florida, USA 1360 (72) Inventor James P. Kyanpe, Florida, USA Stuart, Southwest / Kyabana Point Circle 150

Claims (11)

[Claims] 1. A V-shaped single hull of a ship which is generally shaped to lift above a predetermined reference waterline level when moving forward at a speed exceeding a predetermined speed. Having a front hull of the hull, the front hull of the monohull extending substantially half the length of the hull, and having an outer wall defining the front hull of the hull; separated Including a rear hull of a catamaran comprising first and second catamaran hulls, the rear hull of which extends from the front hull of a monohull to the rear and defines a tunnel therebetween. , Each said catamaran hull has a corresponding outer wall, each corresponding outer wall extending smoothly from a corresponding one of said outer walls of said monohull front hull, and said catamaran rear hull said Constructed to carry and support at least a major portion of the load carried by the catamaran The aft hull does not extend into the front hull of the monohull; including the deck portion extending between and beyond the tunnel and connecting the aft hull of the catamaran; in front of the monohull A discharge member having a first tip portion close to an intermediate region between the partial hull and the rear hull of the catamaran, and a second tip portion always above the water surface for maintaining an atmospheric pressure state in the intermediate region and the tunnel. A hull of the ship characterized by comprising: 2. The hull of a ship according to claim 1, characterized in that said intermediate region is arranged approximately midway in the longitudinal direction along the longitudinal dimension of the hull. 3. The hull of the ship according to claim 1, further comprising a plurality of spines on the outer surface of the front hull of the monohull. 4. The spine includes first, second and third spines, extending from the bow region of the front hull of the monohull and then extending generally rearward and downward. The hull of the ship according to claim 3. 5. A hull of a ship, comprising a single-hull front hull shaped to lift above a predetermined reference waterline level when moving forward at a speed exceeding a predetermined speed. A rear hull of a catamaran comprising first and second catamaran hulls separated from each other, the rear hull of which extends rearwardly from a single hull front hull, Defining a tunnel therebetween, the aft hull of the catamaran being constructed to carry and support at least a major portion of the load carried by the hull; extending between and beyond the tunnel and A deck portion connecting the aft hull of the catamaran; a first tip proximate the mid-region of the front hull of the monohull and the aft hull of the catamaran and the mid-region and in the tunnel Always has a second tip above the water surface to maintain atmospheric pressure A plurality of spines on the outer surface of the front hull of the monohull; comprising a step on each of the rear hulls of the catamaran on its sidewalls facing the tunnel The hull of a ship characterized by. 6. The hull of a ship according to claim 5, wherein the step size is inclined toward the intermediate region. 7. The front hull of the monohull has a lowest position in the intermediate region where the first tip of the ejector member is located proximate to the lowest position. The hull of the ship according to claim 1. 8. The hull of a ship according to claim 1, wherein said hull has a displacement of greater than about 150 tons. 9. The hull of the ship is about 30 feet wide at the aft hull of the catamaran and is about 120 feet long.
And the height from the keel to the deck level is about 15
The hull of the ship according to claim 8, wherein the hull is a foot. 10. A rear wall at the rear end of said single-hulled hull, further comprising a rear wall, each hull of said catamaran having a corresponding inner wall, said tunnel being said inner wall of said hull of said catamaran. The hull of a ship according to claim 1, characterized by being defined by the rear wall of the front hull of the monohull. 11. The hull of a ship according to claim 10, wherein the first tip portion of the discharge member is disposed on the rear wall of the front hull of the monohull.