KR101498216B1 - Apparatus for reducing resistance of vessel - Google Patents

Abstract

A device for reducing the resistance of a ship and a method of manufacturing the same.
The apparatus for reducing resistance of a ship according to an embodiment of the present invention includes a frame portion provided on a bow deck of a ship and a space between the frame portions to reduce a resistance caused by fluid acting on the cargo loaded on the forward side of the ship. RTI ID = 0.0 > panel < / RTI >

Description

[0001] APPARATUS FOR REDUCING RESISTANCE OF VESSEL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistance reducing device for a ship, and more particularly, to a resistance reducing device for reducing a resistance of a ship to reduce a resistance caused by a fluid such as air, wind, green water, And a reduction device.

In general, when a ship is navigating, the ship is subject to resistance by water and waves, as well as by air and wind.

Actually, air resistance deteriorates the fuel efficiency of the ship, deteriorates the maximum speed of the ship, and acts as a factor to deteriorate the steering performance of the ship.

Particularly, in the case of a ship having a large wind pressure area exposed to a high position above the water surface, such as a super large container ship and a cargo carrier, the shape of the main hull and the cargo on the water surface is close to a rectangular parallelepiped, Because of the very large resistance to green water coming into the athlete, there is a heavy resistance on the bow side.

For example, when there are many cargoes or high structures on the upper deck of a container ship, the fuel consumption rate due to the air resistance during operation is high and the fuel consumption rate due to air resistance is higher than that of other vessels high.

If such a player is equipped with a resistance reducing device such as an air spoiler or an air reflector, the aerodynamic design effect can improve fuel economy.

However, since the ship's resistance reduction device must withstand the strong wind pressure, it is very important that the position and form of the strength, weight, installation structure are very important and that it can be properly designed and manufactured to withstand the strong wind pressure. Furthermore, a special configuration dedicated to the ship may be required.

For example, in the case of manufacturing a marine structure, it can be easily manufactured when it is processed and welded using a metal. However, when the size of the structure itself is increased in accordance with a large-sized ship, It is difficult to realize the object of reducing the resistance to be attempted in the resistance reducing apparatus.

In addition, there is a limitation in the place where it is difficult to place a column supporting the structure in order to withstand the wind pressure of the steel plate due to the equipment and the equipment installed in the bow deck of the ship in the inner space blocked by the resistance reducing device of the ship.

In addition, when a ship's resistance reducing device is made of a steel structure, it is convenient for welding and construction by using the same material as a ship, but since it becomes a heavy structure, it takes a long time to pay for investment, It has a great influence on the reduction of the relative container load and the longitudinal strength, which may adversely affect the strength and fatigue.

In addition, when the ship's resistance reducing device is installed as a heavy structure, the weight of the resistance reducing device itself is large, so that large deflection and stress are generated even with a small external force, so that a pillar and a structure connected thereto must be additionally applied This is due to the fact that many fittings are arranged on the upper deck, which makes it difficult to apply and arrange the column structure.

In the technology of the background of the invention, only the shielding cover for protecting the bow is simply installed, and it is possible to withstand the strong wind pressure and the resistance by the green water at the bow of the super large ship, There is no means to be present.

In addition, the technical content of the background of the invention may have a streamlined shape, which may cause difficulty in manufacture and mounting, and it may be practically impossible to manufacture a very large mold for forming an integral structure.

In other words, when a composite structure is to be manufactured using a composite material for a lightweight and integral structure, it is possible to use an integral molding method using an air spoiler, such as an automobile air spoiler, or an existing manufacturing method using a warm- It is very difficult to fabricate a very large structure in a single shape by a method, and difficulties in application such as connection and installation between release materials may occur even in a split production.

Japanese Patent Application Laid-Open No. 10-2008-0065912

An embodiment of the present invention is directed to a vehicle comprising a frame portion connected to bulwark structural members of a ship and a lightweight panel joined to the space between the frame portions and provided in a single unit, Which is able to withstand the loads of fluids such as wind, green water and the like, and which is light in weight, thereby reducing the fuel consumption of the ship.

According to an aspect of the present invention, there is provided a ship structure comprising a frame portion provided on a bow deck of a ship, and a frame portion coupled to the space between the frame portions so as to reduce resistance caused by fluid acting on the cargo loaded on the forward side of the ship A vessel resistance reducing apparatus including a plurality of panels can be provided.

In addition, the frame portion may include a frame frame connected to a bulwark of a forward side of the ship to support a load.

The frame portion may include a plurality of panel frames supported on the frame frame and having a lattice shape and to which the panel is coupled; An outer frame connected to the frame frame or the panel frame and forming an outer periphery of the resistance reducing device; And a diagonal frame connecting the center point of the lower frame of the outer frame and the end of the upper frame.

Further, the outer frame may be a lower frame made of a curved line or a straight line having a bow shape on the xy plane of the ship; An upper frame made of a curved line or a straight line having a width smaller than the width of the lower frame on the xz plane of the ship; And a side frame having a curved line or a straight line connecting an end of the upper frame and an end of the lower frame.

The panel may be joined to the panel fastening groove formed on the side of the panel frame of the frame part, or may be joined to the panel fastening groove formed on the side of the panel frame of the frame part.

In addition, the upper width and height of the resistance reducing device may be 50 to 80% of the maximum stacking height and the maximum stacking width of the forefront container of the ship, respectively.

The frame portion may further include a lug and a foot plate.

Further, the side frame and the frame frame of the frame portion are arranged to coincide with the extending direction of the bulwark structural member of the ship, and the upper surface of the bulwark upper plate of the ship can be in surface contact with the bottom surface of the lower frame.

The embodiment of the present invention can reduce the resistance of the ship due to air, wind, and green water, thereby improving fuel efficiency.

The embodiment of the present invention is characterized in that a lattice-shaped frame portion which is not supported by the column but which is connected to the bulwark structural member on the bow side and a panel which closes the space between the frame portion are inclinedly blocked Can be reduced.

In the embodiment of the present invention, since the membrane-shaped panel is connected between the lattice-shaped frame portions, a considerable weight saving effect compared to the steel structure can be obtained.

Embodiments of the present invention provide a framing frame connected to a bulwark structural member as a frame portion, a panel frame supported by the framing frame, and a diagonal frame connected to the framing frame, Accordingly, there is an advantage that ease of fabrication of the panel and mounting method can be facilitated.

The embodiment of the present invention is an apparatus for testing a resistance reduction device capable of maximizing the fuel efficiency by experimenting with a main shape dimension, which is a shape determining element of the resistance reducing device, in correspondence with the width and height of the front portion of the container, It is possible to provide the main shape dimensions of the main body.

In the embodiment of the present invention, since the frame portion is further provided with a lug and a foot plate, it is easy to mount and detach the resistance reducing device, and the accessibility of the user can be improved even during periodic inspection and partial repair.

The embodiment of the present invention can fix the lower frame of the resistance reducing device by welding or to disassemble and assemblage the bulwark top plate of the ship with the bolts and nuts so that the mounting or disassembling of the resistance reducing device is easy can do.

FIG. 1 is a state diagram showing a state in which a ship's resistance reducing apparatus according to an embodiment of the present invention is applied to a ship.
2 is a perspective view showing a frame part and a panel of the resistance reducing device shown in Fig.
3 is a perspective view showing an inner shape of the resistance reduction device according to the embodiment of the present invention.
4 is a perspective view showing a green water load position of the resistance reducing apparatus shown in FIG.
5 is a graph showing the results of the stress analysis shown in FIG.
Figs. 6 to 8 are views showing main shape dimensions which are the determining elements of the resistance reducing apparatus shown in Fig.
Fig. 9 is an analysis chart showing the air resistance ratio acting on the front portion according to the main shape dimensions of Figs. 6 to 8. Fig.
10 is a perspective view showing a lug and a foot plate of the frame portion shown in Fig.
11 is an exploded perspective view showing a connection method of the resistance reducing apparatus shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a state diagram showing a state in which a ship's resistance reducing apparatus according to an embodiment of the present invention is applied to a ship.

Referring to FIG. 1, the resistance reducing apparatus 100 may be disposed at the bow of the ship 10.

Here, the vessel 10 may be an ultra large container vessel, but it is not limited thereto.

The resistance reducing apparatus 100 increases or decreases the resistance of the ship 10 caused by air, water (e.g., green water) or wind by increasing the fuel consumption of the ship 10, Deterioration of the ship 10 can be prevented or the maneuverability of the ship 10 can be improved.

The resistance reducing apparatus 100 is installed between the forward position of the best stage container 20 loaded on the ship 10 and the boat of the ship 10 on the deck of the ship 10 on the ship 10, And is installed using an empty space in which the container 20 can not be stacked while blocking the front of the container 20, thereby improving the fuel economy without decreasing the stacking efficiency .

Here, the container 20 may mean a plurality of individual container boxes in a state in which a plurality of individual container boxes are stacked in the forward and backward directions.

The ship's resistance reducing apparatus 100 according to the embodiment of the present invention includes a forward side bulwark structural member 11 protruding upward from an upper deck of a ship 10 and a frame portion of the resistance reducing apparatus 100 The resistance reducing apparatus 100 can be firmly coupled to the hull of the ship 10. [0050] As shown in FIG.

Such a tightly coupled resistance reducing apparatus 100 can withstand various loads such as air, wind, and green water without using a separate pole, can not be deflected due to its own load, It is possible to install and use the equipment for various ships 10 in the inner space covered by the apparatus 100.

2 is a perspective view showing a frame part and a panel of the resistance reducing device shown in Fig.

Referring to FIG. 2, the present embodiment includes a frame 110 disposed in a lattice shape on a deck of a bow of a ship and connected to an end of the bulwark structural member of the bow, And may include a plurality of panels 120 in the form of a resistance abatement device 100 coupled thereto.

The plurality of panels 120 are continuously arranged and coupled between the frame portions 110 to form the shape of the resistance reducing apparatus 100 having an operating principle such as an air spoiler, an air reflector, and the like.

9, the frame section 110 includes a frame frame 111, panel frames 112 and 113, diagonal frames 114 and 115, and outer frames 116, 117, 118 and 119 .

More specifically, the frame frame 111 of the frame unit 110 can be connected to the bulwark structural member 11, and the I, L, And may refer to a steel structure such as an H-beam.

As a concrete connection method, the frame frame 111 may be fixed by welding in a state of being in coincidence with the bulwark structural member 11 of the ship, or the frame frame 111 may be fixed by welding The lower frame 117 and the bulwark upper plate 12 which are stacked with the work structural member 11 can be detachably assembled to each other by bolts and nuts.

The panel frames 112 and 113 may be supported by the frame frame 111 and may have a plurality of lattice shapes crossing the horizontal and vertical directions.

The panel frames 112 and 113 may have a panel fastening groove into which the panel 120 may be fitted or filled with an adhesive, a welding metal, or the like, or may have a plurality of panel fastening holes for fastening such as rivets or bolts.

The panel fastening grooves or the panel fastening holes of the panel frames 112 and 113 can be sealed by sealing after the panel 120 is installed.

At this time, the panel 120 may be connected to or coupled to the frame 110 with fasteners including any one of adhesive, rivet, and bolt.

The outer frames 116, 117, 118, and 119 are connected to the frame frame 111 or the panel frames 112 and 113, respectively, and may serve as the outer edges of the resistance reducing apparatus 100.

The outer frames 116, 117, 118 and 119 have a lower frame 117 made of a curved line or a straight line having the shape of a bow on the xy plane of the ship and a width smaller than the width of the lower frame 117 on the xz plane of the ship And a side frame 118 or 119 formed of a curved line or a straight line connecting the end of the upper frame 116 and the end of the lower frame 117. [

The space between the diagonal frames 114 and 115 and the upper frame 116 may be formed in a sloped flat plate shape to reduce fluid resistance such as air and wind.

The diagonal frames 114 and 115 are curved lines or straight lines connecting the center point of the lower frame 117 and the end of the upper frame 116.

The panel frames 112 and 113, the diagonal frames 114 and 115 and the outer frames 116 and 117 and 118 and 119 are connected to the frame frame 111 to form the frame 110, And can be firmly installed on the hull through the bulwark structural member 11 and the bulwark upper plate.

Particularly, since the main load is dispersed toward the hull through the framing frame 111, the bulwark structural member 11 and the bulwark top plate, the panel 120 can be firmly supported by various loads applied to the ship.

The shape of the panel 120 may include rectangular, triangular, as well as other polygons and may have curved outlines.

The panel 120 may have a small panel structure in which a part of the edges are overlapped with each other while being continuously combined with each other, or a panel joining groove formed on the side of the panel frames 112 and 113, And may include a large panel structure that can be coupled using

In addition, the panel 120 may be a membrane-like thin film, a steel thin plate, a composite plate, or the like so as to block air, wind, water and the like. Further, the material of the panel 120 can be selected and used from a panel product group having a material excellent in water resistance and light weight.

As shown in Fig. 3, each panel 120 is supported by the frame portion 110 having the frame frame 111 extending from the bulwark structural member 11, Since the panel 120 is made of a relatively lightweight material as compared with the frame portion 110, it contributes to the weight reduction of the resistance reducing device 100, It can contribute to improvement.

FIG. 4 is a perspective view showing a green water load position of the resistance reducing apparatus shown in FIG. 1, and FIG. 5 is a graph showing an analysis result of the stress shown in FIG.

Referring to FIG. 4, the resistance reducing apparatus 100 shows the arrangement of the green water load determined by the classification rule (for example, German Society for the Classification of German). At this time, the red arrow shape 30 or the point shape 31, And so on can be understood as representing the water load.

5, the maximum stress is 271 MPa, the allowable stress is 294.9 MPa, and the amount of deformation of the frame portion is about 50 mm at the maximum, as a result of the stress analysis of the resistance reducing apparatus of the present embodiment. It can be interpreted that there is no need to apply a column to the column.

In addition, the main shape dimensions of the resistance reducing device 100, which can maximize the fuel efficiency improvement while minimizing the hull resistance, can be determined by the container to be loaded on the ship.

Here, the container 20 may mean a plurality of individual container boxes in a state in which a plurality of individual container boxes are stacked in the forward and backward directions.

Figs. 6 to 8 are views showing main shape dimensions which are the determining elements of the resistance reducing apparatus shown in Fig.

6 to 8, the forward endmost container 20 of the ship 10 may have a maximum stacking height h and a maximum stacking width 1, and in the description of the following main configuration dimensions It can be understood that it is a reference value.

The main shape dimension of the resistance reducing apparatus 100 is determined by the distance a between the best stage container 20 and the air spoiler 100 and the height H of the resistance reducing apparatus which is the ratio of the maximum stacking height h, And the upper end width L of the resistance abatement device (e.g., the length of the upper frame), which is a ratio of the maximum stacking width l.

Here, the point b is the center point of the lower frame, c is the end of the lower frame, and d1 and d2 may be the ends of the upper frame.

Fig. 9 is an analysis chart showing the air resistance ratio acting on the front portion according to the main shape dimensions of Figs. 6 to 8. Fig.

Referring to Fig. 9, the air resistance ratio (%) acting on the front portion of the first stage container may vary depending on the main shape dimensions (e.g., L, H) of the resistance reducing device.

The air resistance ratio was 86.5% when the top width (L) of the resistance reducing device was 50% and the height of the resistance reducing device (H) was 75%, considering only the frontal portion of the container, And it was confirmed that the air resistance was the smallest. Also, if the size is above a certain level, the expected effect is similar and the economic efficiency is reduced.

That is, the air flow passing through the resistance reducing apparatus 100 of the ship flows to the side without colliding with the front portion of the container 200.

Considering the actual operating ratio of the ship (all directions), the fuel efficiency of the ship was found to be the highest with L = 75% and H = 75%.

Therefore, considering the analysis result of FIG. 9 and the actual flight ratio, it can be judged that 50 to 80% of the L and H shape determining factors are appropriate for each reference value.

10 is a perspective view showing a lug and a foot plate of the frame portion shown in Fig.

Referring to FIG. 10, the frame 110 may further include a lug 130 and a foot plate 140.

That is, the lugs 130 are provided on the upper surface of the frame frame 111 and / or the diagonal frames 114 and 115, etc., which can be fabricated from beams of the I-shaped end face of the frame unit 110, (100) can be easily mounted and detached, and the user can easily approach the panel (120) which is required to be inspected and partially repaired even during periodic inspection and partial repair.

11 is an exploded perspective view showing a connection method of the resistance reducing apparatus shown in FIG.

11, an operator lifts a framing frame 111, a lower frame 117, a side frame 118, and the like, which are frame parts for the resistance reducing apparatus 100, using a crane or the like, The frame frame 111 and the side frames 118 are arranged to be aligned with the extending direction of the bulwark structural member 11 and the upper surface of the bulwark upper plate 12 is arranged on the lower frame 117 And then they are connected to each other so that they can be disassembled and assembled by bolts and nuts.

Further, if necessary, a portion of the lower frame 117 and the bulwark upper plate 12, which are in contact with each other, may be fixed to each other by welding.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

10: Vessel 11: Bulwark structural material
20: container 100: resistance reducing device
110: frame part 120: panel
130: Lug 140: Footstool

Claims (8)

A frame part including a plurality of panel frames provided on a player's deck of the ship and having a lattice shape intersecting with the transverse direction and the longitudinal direction and a framing frame for supporting the panel frame,
And a plurality of panels coupled to close the space between the lattice shapes of the panel frame so as to reduce resistance caused by fluid acting on the cargo loaded on the forward side of the ship. The method according to claim 1,
The frame frame
Wherein the steel structure is connected to a bulwark of a forward side of the ship. The method according to claim 1,
The frame unit includes:
An outer frame connected to the frame frame or the panel frame and forming an outer periphery of the resistance reducing device; And
And a diagonal frame connecting a center point of the lower frame of the outer frame and an end of the upper frame. The method of claim 3,
In the outer frame,
A lower frame made of a curved line or a straight line having a bow shape on the xy plane of the ship;
An upper frame made of a curved line or a straight line having a width smaller than the width of the lower frame on the xz plane of the ship;
And a side frame formed of a curved line or a straight line connecting an end of the upper frame and an end of the lower frame. The method according to claim 1,
Wherein:
Wherein the panel is joined to the panel engaging groove formed on the side of the panel frame, or a combination thereof is continuously combined with a part of the edges overlapping each other in a plate shape. The method according to claim 1,
Wherein the top width and height of the resistance reducing device are respectively 50 to 80% of the maximum stacking height and the maximum stacking width of the forwardmost stage container on the forward side of the ship. The method according to claim 1,
In the frame portion,
A resistance reducing device for a ship having a lug and a foot plate. 5. The method of claim 4,
The side frame of the frame portion and the frame frame are arranged to coincide with the extending direction of the bulwark structural member of the ship and the upper surface of the bulwark upper plate of the ship is in surface contact with the bottom surface of the lower frame.

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