JP5050635B2 - Multi-hull sway stabilizer - Google Patents

Description

  The present invention relates to a sway stabilization device for a multihull ship that stabilizes the sway of a ship, in particular, a multihull ship having a main hull in the center and side hulls on both left and right sides of the main hull.

  Among the multihull ships, for example, the trihull ships have a pair of side hulls arranged on the left and right sides of the main hull at the center, and the main hull and the left and right side hulls are connected by decks to form an integral hull. Since an upward force is generated from the side hulls on the left and right of the main hull in the center, a stable posture can be maintained. Therefore, the trimarine is a ship excellent in propulsion performance and motion performance, and also has an advantage that the deck can be enlarged. That is, as a trihull ship, it is composed of a center hull (central fuselage), a pair of wing hulls of the same type and the same size arranged in the left and right symmetrical positions of the diagonally rear part, and a deck, As a new type of hull structure that inherits the vast deck area and stability advantages, which were the characteristics of a catamaran, as well as a high-speed performance that is higher than that of a catamaran. It has been proposed for a long time (for example, see Patent Document 1).

  FIG. 7 shows another type of a trihull ship. A semi-submersible main hull 1 is provided at the lower center of the hull, and semi-sliding outriggers as side hulls are provided on both left and right sides of the semi-submersible main hull 1. The hull 2 is arranged symmetrically to make a trimaran. Denoted at 3 is a deck portion, and the posture is stabilized by the semi-submersible main hull 1 and the left and right outrigger hulls 2 at the center (see, for example, Patent Document 2).

  FIG. 8 shows another example. A pair of side hulls 5 are arranged on both the left and right sides of the central main hull 4 so that the main hull 4 and the side hull 5 are in a semi-submersible state. There is something. Reference numeral 6 denotes a deck structure (see, for example, Patent Document 3).

  Further, FIG. 9 shows another example of a semi-submerged trimarine. A central submerged body 9 as a main hull is attached to a central part of the upper hull 7 via a column 8 so as to be submerged. In addition, side submersible bodies 10 and 11 are attached to both left and right sides of the upper hull 7 via struts 12 and 13, respectively, so that they are submerged together. It is set as the structure which attached the hydrofoil 14 and 15 to the left-right both-sides board of the side and the stern side in the horizontal direction (for example, refer patent document 4).

  Furthermore, a pentamaran having five hulls is known as a multihull ship other than the above-mentioned trimaran.

Japanese Patent Laid-Open No. 49-100789 JP-A-63-130492 Special Table 2002-516785 gazette JP 60-85089 A

  However, among the multihulls, in the case of the trihulls described in Patent Documents 2 to 4, the semi-sliding outrigger hull 2 as the left and right side hulls, the side hull 5, the side submersible 10, If the 11 is not set to a certain size, a side hull such as a semi-sliding outrigger hull 2 on one side, a side hull 5 or a side submerged body 10 or 11 will be generated in the trimarine. There is concern about the possibility of sudden loss of stability and capsizing when a large-inclined swaying motion occurs on the surface of the water. Therefore, the semi-sliding outrigger hull 2, the side hull 5, and the side submerged bodies 10, 11 are assumed to be large.

  However, there is a problem that the propulsion performance and motion performance of the ship will be reduced if the side hull of the above-mentioned trimarine is made large enough to eliminate the risk of rollover during rolling. .

  Therefore, there is a need to develop a hull form that excels in stability, propulsion performance, and motion performance when rolling.

  Therefore, in order to meet such a need, the present invention can maintain the stability of the hull even when one side hull comes out on the water surface when rolling, and there is no risk of overturning. An object of the present invention is to provide a shaker for a multihull ship capable of improving propulsion performance and motion performance.

The present invention, in order to solve the above problem, the left and right sides of the main hull of the central portion, a pair of water on the overhanging member disposed mainly hull or al away, mounted in a horizontal state in the front-rear direction, the water surface so as to form a gap between the and under surface of the該Sayu pair of the water surface projecting member, by attaching the side hulls, the respective side hull so as to Hanbotsu water state, the pair of right and left on the water surface The gap formed between the overhanging member and the surface of the water is the same when the water does not hit the overhanging member during hydrostatic sailing and the bottom of one side hull comes out on the water surface when rolling. The distance is such that the member can land on the water, and the pair of left and right water surface overhanging members are configured to have a hull shape and have buoyancy when landing .

According to the shake stabilizing device for a multihull ship of the present invention, the following excellent effects can be obtained.
(1) to the left and right sides of the main hull of the central portion, a pair of water on the overhanging member disposed main hull or et away to, the longitudinal direction is attached to the horizontal state, so as to form a gap between the water surface to, and under surface of the該Sayu pair of the water surface projecting member, by attaching the side hulls, the respective side hull so as to Hanbotsu water state, formed between the pair of right and left on the water surface overhanging member and the water surface The distance is such that the waves do not hit the overhanging member during hydrostatic navigation and the bottom of one side hull comes out on the water surface when rolling and the other overhanging member can land at the same time. Furthermore, since the pair of left and right water surface overhanging members are formed into a hull shape and have buoyancy when landing , the water surface overhanging member itself has stability against ship shake. Have Things can, the left and right of each side hulls, is attached directly to the deck of the main hull can be considerably smaller than in the case of arrangement, propulsion performance of the multi-hulls, can improve maneuverability.
(2) a gap formed between the pair of left and right respective water surface overhanging member and the water surface, the waves may not hit the water surface projecting member when run hydrostatic Kou, ship bottom portion of one of the side hull is out on the water surface during rolling Ri simultaneously tare as the other water surface overhanging member a distance that allows water landing when, further, the pair of water on the overhanging member itself having a buoyancy and Citea Runode during landing, multi hulls is When the large hull rolls and the bottom of one side hull comes out on the surface of the water, stability can be maintained by the landing of the overhanging member on the opposite side at the same time. In addition, since the pair of water surface overhang members have a boat shape, the influence on the propulsion / motion performance can be eliminated even if a wave hits the water surface overhang members.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 to FIG. 4 schematically show an example when applied to a trihull ship as an embodiment of a multi-hull sway stabilization apparatus of the present invention, and the required space from the main hull 16 in the center is shown. On the left and right sides, the water surface overhanging member 17 has a length corresponding to, for example, a length region extending from the center portion to the stern end of the main hull 16 and having a required height and thickness dimension. 18 are arranged horizontally symmetrically in the front-rear direction, and are attached to both left and right brim parts of the deck 19 of the main hull 16 so as to protrude downward, respectively, and a pair of water surface overhanging members 17, 18 on the left and right The required gap 21 is provided between the lower surface of each of the left and right water surface overhang members 17 and 18 and the water surface 20. Further, the side hull 22 has a small height (depth) dimension to the bottom of the ship and a small length in the front-rear direction on the lower surface of the rear end side (stern side) of the left and right water surface overhang members 17, 18. , 23 are fixed to each other, and there are side hulls 22, 23 below the water surface overhanging members 17, 18 on the water surface, and the side hulls 22, 23 are in a semi-submersible state. It is a trimaran.

  In the gap 21 between the lower surface of each of the water surface overhang members 17 and 18 and the water surface 20, the bottom of the side hull 22 or 23 is shown in FIG. As shown, the distance is such that the other water surface overhanging member 18 or 17 can land on the surface of the water, and a wave is generated on the water surface overhanging members 17 and 18 at the time of running in the still water. Try to keep the distance away.

  As described above, the multi-hull sway stabilization device of the present invention has a configuration in which the overhang members 17 and 18 are attached to the water surfaces of the left and right sides of the main hull 16 and the side hulls 22 and 23 are attached to the lower part thereof. Therefore, the side hulls 22 and 23 are significantly (for example, about 20%) smaller than the case of the trimaran where the side hull is directly attached to the deck 19 of the main hull 16 and is in a semi-submersible state. It can be made a hull form.

  Further, the cross-sectional shape of the left and right water surface overhanging members 17 and 18 is substantially V-shaped in accordance with the shape in which the lower side hulls 22 and 23 linearly increase upward as shown in FIG. And a hull shape that does not affect the propulsion / motion performance even if a wave hits. Further, the size of each of the water surface overhanging members 17 and 18 is longer than the length of each of the side hulls 22 and 23 as shown, and the volume of the water surface overhanging member 17 or 18 is the volume of the side hull 22 or 23. The stability of the ship can be maintained as if it has buoyancy when landing on its own.

  As described above, the multi-hull sway stabilization device of the present invention has a configuration in which the overhang members 17 and 18 are attached to the water surfaces of the left and right sides of the main hull 16 and the side hulls 22 and 23 are attached to the lower part thereof. Therefore, the side hulls 22 and 23 are significantly (for example, about 20%) smaller than the case of the trimaran where the side hull is directly attached to the deck 19 of the main hull 16 and is in a semi-submersible state. It can be made a hull form. Thereby, it is possible to improve the propulsion performance and motion performance of the trimaran when the multihull is a trimaran.

  Since the multi-hull stabilization device of the present invention has the above-described configuration, the tri-hull as a multi-hull ship equipped with the device of the present invention rolls around the center of rotation O due to waves or the like while traveling. 4, when the left side in the figure is lifted so that the left side hull 22 protrudes above the water surface 20, the right side hull 23 on the opposite side in the figure is submerged and on the water surface. The overhang member 18 is in a state of landing at the same time. As a result, the stability of the hull can be maintained by the water surface overhanging member 18 on the right side in the figure, and even if the trimarine is largely tilted, further tilting can be suppressed. Overturning can be prevented beforehand.

  Similarly, even when the trimarine is largely inclined in the direction opposite to that shown in FIG. 4, the bottom of the side hull 23 on the right side in the figure comes out on the water surface, and at the same time, the water surface overhanging member 17 on the left side in the figure is attached. Since stability can be maintained by watering, it is possible to eliminate the risk of rollover.

  Next, FIGS. 5 (a) and 5 (b) show an example in which the invention is applied to a pentamaran type five-hull boat having five hulls as another embodiment of the multi-hull sway stabilizing device of the present invention. For example, it has a pair of side hulls on the left and right side portions on the bow side of the main hull provided in the center, and on the left and right side portions on the stern side of the main hull, it is positioned outside the side hull on the bow side. In a five-hull ship having a pair of side hulls and having a large area deck, a pair of left and right side hulls 26 and 27 on the bow side of the main hull 25 project downward from the lower surface of the deck 24. In the same manner as shown in FIG. 1, the side hulls 26 and 27 are set in a semi-submerged state. . Further, a pair of left and right side hulls 28 and 29 provided on the stern side are attached to the left and right saddles of the deck 24 so as to protrude downward, and are disposed on the water surface overhanging members 32 and 33 arranged in a horizontal state in the front-rear direction. The side hulls 28 and 29 are semi-submerged in the same manner as described above.

  According to this embodiment, the side hulls 26, 27, 28, 29 as four hulls in the five-hull ship are all attached to the deck 24 via the water surface overhanging members 30, 31, 32, 33. Therefore, the embodiment shown in FIG. 1 to FIG. 4 can be used even if the wave from the diagonal acts on the five-hull and the wave force acting on the left and right side hulls may roll due to unbalance. The same effect as in the case of can be obtained.

  FIG. 6 shows a pentamaran type five-hull boat different from the five-hull boat shown in FIG. 5, and a pair of side hulls 26, 27 provided on the left and right sides of the bow of the main hull 17 at the center. And a pair of side hulls 28 and 29 provided on the left and right side portions on the stern side are symmetrically arranged.

  The present invention can also be applied to such a boat-shaped five-hull ship as in the case shown in FIGS.

  It should be noted that the multi-hull sway stabilizing device of the present invention is not limited to the above embodiment. For example, in FIGS. 1 to 3, side hulls 22 and 23 are disposed on the stern side of the main hull 16. Although illustrated with respect to the case, the present invention can also be applied to the case where the side hulls 22 and 23 are disposed also in the center portion and the bow side portion of the main hull 16, and the cross-sectional shapes of the water surface overhang members 17 and 18 are shown in FIG. The embodiment shown in FIG. 5 is not limited to that shown and described, and in the embodiment shown in FIG. 5, the overhanging members 30, 31, Although the case where it fixed to the lower surface of 32,33 was shown, only either one of a pair of right and left side hulls 26 and 27 or 28 or 29 is fixed to the lower surface of the overhanging member 30 and 31 or 32 and 33 Unishi and may be, it is obvious that various changes and modifications may be made without departing from the scope and spirit of the other present invention.

It is a schematic front view which shows one Embodiment of the shaking stabilization apparatus of the multihull ship of this invention. It is a schematic side view of FIG. FIG. 3 is a partial plan view of FIG. 2. It is a schematic front view which shows the state which the trimarine ship provided with the shaking stabilization apparatus of the multihull ship of this invention rolled. The other form of implementation of the shaking stabilization apparatus of the multihull ship of this invention is shown, (A) is a schematic plan view, (B) is a schematic front view of (A). FIG. 6 is a schematic plan view showing another type of five-hull boat as the multihull boat shown in FIG. It is a front view of the conventional trimarine. It is a front view which shows the other example of the conventional trimarine. It is sectional drawing which shows the further another example of the conventional trimarine.

Explanation of symbols

16 Main hull 17, 18 Water surface overhang member 19 Deck 20 Water surface 21 Clearance 22, 23 Side hull 26, 27 Side hull 28, 29 Side hull 30, 31 Water surface overhang member 32, 33 Water surface overhang member

Claims (1)

The left and right sides of the main hull of the central portion, a pair of water on the overhanging member disposed mainly hull or al away, mounted in a horizontal state in the front-rear direction, so as to form a gap between the water surface, and under surface of該Sayu pair of the water surface overhang member, gap attach the side hulls, the respective side hull so as to Hanbotsu water state is formed between the pair of right and left on the water surface overhanging member and the water surface The distance should be such that the waves do not hit the overhanging member during hydrostatic navigation and that the other underwater overhanging member can land at the same time when the bottom of one side hull comes out on the water surface when rolling. Furthermore, the swing stabilization device for a multihull ship is characterized in that the pair of left and right water surface overhanging members have a hull shape and have buoyancy at the time of landing .

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