KR100793847B1 - Catamaran changing interval between two hulls - Google Patents

Abstract

The present invention improves the structure of a catamaran boat in which two hulls and a superstructure are fixed in the prior art, and the spacing between the two hulls can be changed to flexibly cope with frequently changing sea conditions and working environments. It's about catamarans.

The hull of a catamaran is a principle that adjusts the gap between two hulls by using the propulsion force of the propeller and the resistance of the water received by the hull.The hull is a combination of resistance and propulsion force, and the upper structure fixing the two hulls is hinged. The hull distance can be adjusted.

In other words, the space between the hulls varies depending on the ship speed, and the position of the center of gravity moves, which makes it possible to draw out the characteristics of the slide that can cope flexibly with sea conditions and working environments.

Hull, anchor beam, hinge, propeller, water resistance

Description

Catamaran changing interval between two hulls

1 is a plan view of a stationary state of a catamaran ship according to an embodiment of the present invention

2 is a plan view of an acceleration state of a catamaran vessel according to an embodiment of the present invention;

3 is a front view of a stationary state of a catamaran ship according to an embodiment of the present invention;

4 is a front view of an acceleration state of a catamaran ship according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100,200: hull 101,102,201,202: fixed joint

300: deck 301, 302: joint

310: Cabin 321,322,331,332: Link

400: propeller

The present invention relates to a catamaran, and more particularly, to improve the structure of a catamaran boat in which two hulls and a superstructure are fixed in the prior art, the spacing between the two hulls can change, the sea state often changes And catamarans that can flexibly cope with the work environment.

Currently, many single acting ships with one hull are used, ranging from small working ships to huge tankers.

It is not only cheaper to build the same weight tonnage than catamarans, but also to build a large number of single copper ships because of a lot of previously studied information. In addition, in terms of construction technology, labor is less than that of catamarans, and space is more free than catamarans.

However, in the case of the single-dong line, the ship moves easily due to the waves, causing many seasickness. In addition, compared with catamarans, the length of the width direction is shorter, so the moment of restoration becomes smaller, which should be complemented as a leisure type vessel that considers safety performance as an important factor.

Next, we will look at catamaran linear, which is literally a ship with two hulls, and is a linear structure with a deck that acts as a bridge on a similar hull submerged in water.

Since this twin-linearity has two hulls, it is true that waves generated by the respective hulls interfere with each other, resulting in poor resistance performance.

The advantage of catamarans is that it has a wider deck than single-hand boats, which is advantageous for ships that require wide decks, such as passenger ships or marine exploration ships. Moreover, since the length of the width direction is longer than a single copper wire and a restoration moment increases, stability is better than a single copper wire.

Catamaran ships require more engine power to maintain higher speeds than single-acting ships, but they can operate without deceleration, even in the most blue waves. It is also superior to single-acting linear in terms of maneuverability.

Of course, there is a disadvantage in that the drying ratio is higher than the single copper line of the same drainage tone and the frictional resistance tends to increase because the submerged surface area is larger than that of the single copper line.

However, many studies have been conducted to minimize the interference of the waves produced by the two hulls, so that the harmonic resistance can be reduced, which can cancel the interference by the wave to some extent.

As a result of comparing the advantages and disadvantages of Dandong and Ssangdong from above, it is the space, stability and comfort that should be the first priority for the leisure vessel. In addition, if ship owners are under the same conditions, a large deck with excellent stability can reduce damage in terms of maritime safety accidents.

The same conditions for passengers will want more ships with better space and stability and less fatigue from motion sickness.

Taken together, the catamaran is a ship type of leisure vessel in terms of stability and workability.

The position of the center of gravity in such single or twin vessels has a great influence on the slide time, the resilience and the hanger posture.

The glide is a principle in which the hull rises due to the hydrodynamic force in the hull in a fast time, and when the hull rises, the area of water resistance received by the hull decreases, thereby gaining much benefit in the resistance performance.

Positioning the center of gravity at the back of the boat results in a reduction in the run time, which in turn provides a benefit in terms of resistance, but this is a disadvantage for the ship's hang position.

In addition, when the position of the center of gravity is located relatively forward, the stomach is stable in a stable posture, but the resistance of the stomach is relatively increased.

However, the existing ship has a fixed structure and a hull as one, and therefore the position of the ship's weight center (weight center) that has a great influence on the ship's posture is fixed.

In all ships, the position of the ship's center of gravity is an important variable in determining the ship's characteristics. In the case of sliding vessels, speed and hanger posture will be affected by the ship's center of gravity.

Therefore, when designing a ship, it should be designed considering the ship's center of gravity. This is especially important for leisure ships, because the overall weight is small and the change in the posture of Hangzhou depends on the position of the ship's center of gravity.

Of course, there is a way to move the position of the weight by using a mechanical device to the position of the center of gravity (weight center), but this has the disadvantage of increasing the weight of the ship and the reason that the price of the other mechanism to be installed.

In addition, in the case of catamaran, the resistance is increased by the waves generated by the hull due to the gap between two hulls. According to the known technique, the maximum length is optimized to the length that can support the upper structure of the ship. The interval is determined.

The advantage of catamarans is that the width of the superstructure is wider than other single copper lines, so there is good work efficiency.

The wider the interval, the better. If the hull is too wide at this point, it becomes very unstable structurally.

However, it seems that there is a problem in the existing ship form to meet all of the ship's resistance performance, stability and boarding feeling.

Moreover, in the case of the existing leisure catamaran, the upper structure is fixed to the hull, so the linear shape is determined according to the purpose, and since the determined linear shape constrains all the variables of the ship, As a result, it is difficult to adequately cope with the working environment.

The present invention is a structure that can flexibly cope with the frequently changed sea conditions or working environment by moving the center of gravity of the structure in the ship field, by moving the center of gravity by the movement of the hinge by placing the existing fixed structure on the moving hinge structure It is to maximize the characteristics of catamaran runway.

The present invention for achieving the above object, two hulls; Two or more links having one end rotatably connected to a position corresponding to each of the hulls; Joints connecting the other ends of the respective links of the hulls to be rotatable with each other; A deck installed on the joint; And it is a catamaran ship including a propulsion device installed on the rear of the deck.

The center of gravity of the entire catamaran is characterized in that the bias toward the rear side than the center of the area of the deck.

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Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described. In adding reference numerals to components of the following drawings, it is determined that the same components have the same reference numerals as much as possible even if displayed on different drawings, and it is determined that they may unnecessarily obscure the subject matter of the present invention. Detailed descriptions of well-known functions and configurations will be omitted.

The concept of catamaran of the present invention is characterized by changing the way the existing hull and the top is fixed, allowing the hull spacing and the deck to move.

Therefore, in the case of the existing leisure catamaran, the upper structure is fixed to the hull, so the linear shape is determined according to the purpose, and since the determined linear shape constrains all the variables of the ship, the sea state frequently changes due to the weather. According to the present invention, it is difficult to adequately cope with the working environment. However, the present invention can flexibly cope with frequently changing sea conditions and working environment because the interval between two hulls can be changed.

In addition, a fast speed can be obtained by using a stern trim in a low speed section.

In other words, since the center of gravity at the initial departure is relatively behind, the area of the hull resisted can be reduced in the shortest time, and the position of the center of gravity is moved forward to make the ship's hang position better. You can see many benefits.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

As shown in Figures 1 and 2, an embodiment of the present invention is a catamaran of two hulls (100,200).

Two links 321, 322, 331, and 332 are rotatably installed on the fixing joints 101, 102, 201, and 202, respectively, on the two hulls 100, 200.

The links 321, 322, 331 and 332 are installed at the hulls 100 and 200 to correspond to the same positions in the longitudinal direction.

The number of the links 321, 322, 331, 332 is two pairs, but may be more than this.

The links 321, 322, 331, 332 are rotatably connected to corresponding links 321, 322, 331, 332 by joints 301, 302.

The deck 300 is integrally fixed to the joints 301 and 302, and the cabin 310 is disposed on the deck 300.

In addition, a thruster 400 is installed at the rear of the deck 300 to generate thrust that the catamaran can move forward.

In the above configuration, when the entire center of gravity of the catamaran is in a stationary state, it is biased toward the rear side than the center of area of the deck.

In addition, when the interval between the hulls 100 and 200 is narrowed, the links 321, 322, 331 and 332 rotate to advance the joints 301 and 302 so that the deck 300 moves forward at the same time, so that the center of gravity is also advanced. do.

On the contrary, when the interval between the hulls 100 and 200 is widened, the deck 300 is reversed by the opposite action of the action, and thus the center of gravity is also reversed.

In addition, it is possible to prevent the rotation of the joints (301, 302) or fixing joints (101, 102, 201, 202) by a known fixing means such as fixing bolts to fix the interval of the hull (100, 200) at any position.

Hereinafter, the operation relationship of the above-described embodiment will be described.

In the stationary state, as shown in FIGS. 1 and 3, the interval between the hulls 100 and 200 becomes maximum, and the center of gravity G is biased toward the rear side as much as possible.

When the catamaran starts to move, as shown in FIGS. 2 and 4, the resistance of the water received by the hulls 100 and 200 and the driving force generated by the thruster 400 narrow the gap between the hulls 100 and 200. Therefore, the deck 300 is advanced by the links 321, 322, 331, and 332 so that the center of gravity G is also advanced. That is, the deck 300 in which the propeller 400 is installed is advanced by the thrust of the propeller 400, and the hulls 100 and 200 are attracted to the deck 300 due to the resistance of water, so that the deck 300 Will be located behind. Therefore, the gap between the hulls 100 and 200 becomes narrow.

Therefore, the interval between the hulls 100 and 200 can be changed, so that it is possible to appropriately cope with the working conditions or the sea conditions frequently changed by the weather.

For example, when a wave or the like occurs largely, the gap between the hulls 100 and 200 can be widened as much as possible to increase the stability of the catamaran vessel, and when the fast movement is desired, the gap between the hulls 100 and 200 can be narrowed and moved quickly. To make it possible.

In addition, in general, a small ship such as a catamaran can receive a hydrodynamic force and the front end of the hull rises. At this time, when the hull rises, the area of water resistance received by the hull decreases, which greatly benefits the resistance performance. You get

At this time, if the position of the center of gravity is located at the rear of the ship, it will reduce the running time, but will give a lot of disadvantages to the ship's hang position.

Therefore, according to the present invention, when the speed of the ship is increased and the position of the center of gravity is located relatively forward, it is possible to maintain a more stable posture in the state of securing resistance performance.

It is also believed that the increase in resistance due to the advance of the center of gravity will only be affected by the low speed section.

The reason for this is that in the high speed range, if the hull is already supported by the fluid dynamic pressure, the change in the center of gravity will only play the role of posture adjustment.

Therefore, in low speed sections, it is only necessary to reduce the interval until such phenomenon does not occur.

In addition, there is a problem that may be a problem, the waves caused by the two hulls interfere with each other, the resistance may increase.

The interference effect received by the two hulls (100,200) is initially as small as possible due to the slow speed, and as the speed increases, the width of the hulls subject to resistance decreases as the spacing of the hulls (100,200) decreases, so that the width of the hull is wide or The difference when narrow is almost the same.

That is, although the interval between the hulls 100 and 200 is wide at the beginning, as the speed increases, the interval between the hulls 100 and 200 decreases, so that the area of the hull subjected to resistance decreases (that is, the flooding area due to the sliding decreases). Therefore, the increase of the interference effect in the high speed region is not so great.

As described above, it has been described with reference to the preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

According to the present invention, the interval between the two hulls can be changed, so that it is possible to flexibly cope with the frequently changed sea conditions and working environment.

For example, in case of fishing boats, family passengers, or marine work vessels, if the deck space is wide when the suspension time is long and the floating time is long, the inconveniences such as seasickness for movement in the blue have better conditions than single-acting linears. When moving, it is possible to provide a superior ship in many ways than a catamaran or a single caterpillar fixed to the existing hull, if it is possible to perform stable driving by selecting a center of gravity that is good for resistance performance or Hangzhou posture and changing it according to the situation.

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In addition, since the space between the hulls is not a separate mechanical device, but the balance between the resistance of the water received by the hull and the propulsion force generated by the propeller, the cost for installing the device for adjusting the space between the hulls is increased. It can be saved and no power is needed to maintain it.

Claims (3)

Two hulls; Two or more links having one end rotatably connected to a position corresponding to each of the hulls; Joints connecting the other ends of the respective links of the hulls to be rotatable with each other; A deck installed on the joint; And Catamaran vessel comprising a propulsion device installed in the rear of the deck. The catamaran vessel according to claim 1, wherein the center of gravity of the entire catamaran vessel is biased toward the rear side than the center of gravity of the deck. delete

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