JP5104515B2 - Multi-vibration shaker - Google Patents

Description

  The present invention relates to a multihull ship that includes side hulls on both right and left sides of the main hull in the center, and reduces the sway of the multihull ship that allows the main hull and the left and right side hulls to run in a semi-submersible state. This relates to a vibration reduction device.

  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).

  By the way, in the above-mentioned trimarine, it has been conventionally proposed to provide a trim tab at the rear end of the main hull (see, for example, Patent Document 2).

  Further, as a multihull ship other than the above-mentioned three-hull ship, a five-hull ship (pentamaran) having five hulls with a pair of a front side hull and a rear side hull on each of the left and right sides of the main hull is known. Yes.

Japanese Patent Laid-Open No. 49-100789 Japanese Patent No. 2624453

  However, if the hull of a multihull vessel rolls greatly and the side hull is exposed, the hull will be greatly inclined, but to prevent the side hull from being exposed in a multihull vessel As for the vibration reduction device, the actual situation is that it has not been particularly proposed.

  That is, in general, the trim tab is known to function effectively to reduce rolling in a single hull, but in the above-mentioned trimarine, the width of the main hull is smaller than the width of the entire hull. In addition, as shown in Patent Document 2, even if the trim tab is provided at the rear end of the main hull, the distance between the point of action of the force by the trim tab and the roll center of the hull is short. The reality is that it is difficult to reduce rolling on a trimaran.

  Moreover, side hulls are not effectively used in conventional multihull ships.

  Therefore, the present invention effectively uses a side hull for a multihull ship to obtain a sufficient anti-rolling effect against rolling and a multi-boat capable of obtaining anti-shake effect against pitching. It is intended to provide a shipboard vibration reduction device.

The present invention, in order to solve the above problems, and the main hull Hisashi Naka portion, the rear end surface of each side hull in a multi hulls with a side hulls disposed on the left and right sides of the main hull, GenYurayo A trim tab is provided rearwardly , and the anti-shake trim tab is in contact with the surface of the water when the multihull is pitched or rolled. It is set as the structure formed by attaching it above a waterline level or a waterline level .

The multihull anti-shake device of the present invention exhibits the following excellent effects.
(1) and the main hull of the central portion, the rear end surface of each side hull in a multi hulls with a side hulls disposed on the left and right sides of the main hull, provided GenYurayo trim tab backwards, and the reduced swing So that the trim tabs come into contact with the water surface when the multihull rolls or rolls, the trim tabs on the side hull at the rear end surface of each side hull or below the waterline level Since it is configured to be mounted on the upper side, when rolling occurs on the multihull, if the trim tab for vibration reduction of each side hull is deployed, the side hull is reduced as the multihull rolls. The reaction force when the trim tab comes into contact with the water and pushes the surface of the water can exert a force in the direction to cancel the roll of the multihull, thereby reducing the roll of the multihull quickly. Rukoto can. Furthermore, it is possible to take a long lever from the swing center of the roll of the multihull to the point of action of the force acting in the direction to cancel the roll of the multihull with the trim tab provided on each side hull, A large roll damping effect can be obtained.
(2) Also, when pitching occurs in a multihull, if the trim tab for reducing vibration provided at a position away from the rocking center of the pitching is developed, along with the pitching of the multihull, The reaction force generated when the developed anti-shake trim tab touches the surface of the water when it touches the water can exert a force in a direction that cancels the pitching of the multihull. The shaking can be quickly reduced.
(3) Since the trim tab for constituting the multihull vibration reduction device is provided on each side hull of the multihull ship, each side hull can be used effectively.
(4) the GenYurayo trim tab, since the waterline level or the waterline level of the side hulls are a configuration in which to attach the upper side, so make cruising the main hull and the right and left side hull at Hanbotsu water state When the multihull boat rolls and rolls, the side hull's anti-trimming trim tab can be reliably brought into contact with the water surface.

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

  1 (a) (b) and FIG. 2 (b) (b) are applied to an anti-vibration apparatus for a trihull ship as a multi-hull ship as an embodiment of the multi-hull ship anti-vibration apparatus of the present invention. The case is shown, and the configuration is as follows.

  That is, in the trimaran 1 in which a pair of side hulls 3a, 3b are provided on both starboard side and port side sides of the main hull 2 in the center, and a pair of left and right trim tabs 4 are provided on the stern of the main hull 2. On the rear end surfaces of the left and right side hulls 3a and 3b, anti-shake trim tabs 5a and 5b are respectively provided facing backward.

  In detail, the trim tabs 5a and 5b for vibration reduction are attached to the waterline level at the rear end surfaces of the left and right side hulls 3a and 3b, or the boat 3 is pitched slightly above the waterline level. It is attached so as to come into contact with the water surface when rolling. Each of the anti-shake trim tabs 5a and 5b is configured to be developed and stored by an actuator 6 such as a hydraulic cylinder.

  4a is an actuator for the trim tab 4 of the main hull 2, and 7 is a deck for connecting the main hull 2 of the trihull 1 and the left and right side hulls 3a and 3b. For convenience of illustration, the description of various accessory devices other than the trim tabs 4, 5a, 5b such as a propulsion device provided in the main hull 2 of the trimaran 1 is omitted (also in the following embodiments). The same).

  In the state where the trimaran 1 equipped with the anti-vibration device having the above-described configuration is being navigated by a propulsion device (not shown), The left and right anti-shake trim tabs 5a and 5b provided on 3a and 3b are deployed together by the corresponding actuator 6. As a result, when the side hulls 3a or 3b are alternately lowered due to the roll of the trimaran 1, for example, as shown in FIG. 2 (a), when the starboard side hull 3a is lowered due to the roll, the starboard side hull 3a Since the vibration reduction trim tab 5a mounted on 3a comes into contact with the water surface and pushes the water surface, the reaction force acts as a force in a direction to suppress the phenomenon that the starboard side hull 3a is lowered. Become.

  On the other hand, although not shown, when the port-side side hull 3b is lowered due to rolling, the anti-shake trim tab 5b mounted on the port-side side hull 3b comes into contact with the water surface and pushes the water surface. The reaction force acts as a force in a direction to suppress the phenomenon that the port side side hull 3b is lowered.

  Therefore, each time the left and right side hulls 3a and 3b are alternately lowered by the rolling of the above-mentioned trimarine 1, every time the vibration reduction trim tabs 5a or 5b provided on the side hull 3a or 3b on the lower side alternately contact the water surface. Since the force in the direction of suppressing the roll is applied to the trimaran 1, the roll of the trimaran 1 is quickly reduced.

  Further, in the state where the above-described trimaran 1 is being navigated by a propulsion device (not shown), when the three-marine boat 1 is pitched, the left and right side hulls 3a and 3b are disposed on the rear end surfaces. The provided left and right vibration reduction trim tabs 5 a and 5 b are deployed together by the corresponding actuator 6. As a result, as shown in FIG. 2 (b), when the stern side of the trihull 1 is lowered as compared with the bow side, the trim tabs 5a, 5b for the side hulls 3a, 3b are placed on the water surface. When in contact, the reaction force when each of the anti-vibration trim tabs 5a, 5b pushes the water surface acts as a force in a direction to suppress the phenomenon that the stern side of the trimaran 1 is lowered.

  Accordingly, the stern part is lowered due to the pitching of the trimaran 1 and each time the trim tabs 5a, 5b provided on the left and right side hulls 3a, 3b come into contact with the water surface, Since a force in a direction to suppress the pitching is applied, the pitching of the trimaran 1 is quickly reduced.

  As described above, according to the above-described trimmer ship vibration reduction device, the trim tabs 5a for vibration reduction provided on the rear end surfaces of the side hulls 3a and 3b by effectively using the side hulls 3a and 3b of the trimaran 1 respectively. , 5b in the unfolded state, it is possible to obtain the effect of reducing the rolling and pitching of the trimaran 1. Furthermore, when the above-mentioned trimaran 1 rolls, the above-mentioned trimaran 1 is made to the left and right side hulls 3a and 3b when the trimming trim tabs 5a and 5b mounted on the left and right side hulls 3a and 3b are in contact with water. Therefore, a force from the center of the trimaran 1 to the point of action of the force can be long, and a large roll damping effect can be obtained.

  Next, FIG. 3 (a) (b) shows another embodiment of the present invention, as an application example of the embodiment of FIG. 1 (b) (b) and FIG. 2 (b) (b). The present invention is applied to an anti-vibration device for a five-hull ship as a ship. The main hull 2 is provided with a pair of front side hulls 3c, 3e and rear side hulls 3d, 3f on the starboard side and port side, respectively. In a five-hull boat 8 in which a pair of left and right trim tabs 4 are provided at the stern of the hull 2, the rear end surfaces of the front and rear side hulls 3c and 3d and the rear of the side hulls 3e and 3f on the starboard side As with the anti-vibration trim tabs 5a and 5b shown in FIGS. 1 (a) and 2 (b), the anti-vibration trim tab 5c can be developed and stored by the actuator 6 on the end face. , 5d, 5e, and 5f, respectively.

  The above-mentioned anti-shake trim tabs 5c, 5d, 5e, and 5f are attached to the waterline level at the rear end face of each side hull 3c, 3d, 3e, and 3f, or the trolley 8 is vertically above the waterline level. It shall be attached so as to come into contact with the water surface when shaking or rolling.

  In addition, the same components as those shown in FIGS. 1A and 1B and FIGS. 2A and 2B are denoted by the same reference numerals.

  According to the vibration reduction device for a five-hull ship of this embodiment, the five-hull ship 8 equipped with the vibration reduction device rolls on the five-hull ship 8 while being navigated by a propulsion device (not shown). When (rolling) occurs, the anti-vibration trim tabs 5c, 5d, 5e, 5f provided on the side hulls 3c, 3d, 3e, 3f are developed by the corresponding actuators 6. In this state, the side hulls 3c and 3d on the starboard side are lowered by the roll of the five-boat 5 so that the trim tabs 5c and 5d provided on the side hulls 3c and 3d are in contact with the water surface and push the water surface. The reaction force at this time acts as a force in a direction to suppress the phenomenon that the side hulls 3c and 3d on the starboard side are lowered.

  On the other hand, when the port-side side hulls 3e and 3f are lowered by rolling, the anti-shake trim tabs 5e and 5f mounted on the port-side side hulls 3e and 3f are in contact with the water surface, and the anti-shake trim tabs 5e and 5f When the water presses the water surface, the reaction force acts as a force in a direction to suppress the phenomenon that the side hulls 3e and 3f on the port side are lowered.

  Accordingly, the left and right side hulls 3c, 3d and 3e, 3f are alternately lowered by the rolling of the five-hull ship 8, and the vibration reduction trim tabs 5c, 5d provided on the lower side hull 3c, 3d or 3e, 3f are provided. Alternatively, each time 5e and 5f alternately come into contact with the water surface, a force in a direction to suppress roll is applied to the five-hull ship 8, so that the roll of the five-hull ship 8 is quickly reduced. It becomes like this.

  Further, when pitching occurs during the navigation of the above-mentioned five-body ship 8, the trim tabs 5d and 5f for vibration reduction provided on the rear end faces of the rear side hulls 3d and 3f on the starboard side and the port side are provided. The two actuators 6 are deployed together. As a result, when the stern side of the five-hull ship 8 is lowered as compared with the bow side, the vibration reduction trim tabs 5d and 5f provided on the rear end surfaces of the rear side hulls 3d and 3f are in contact with the water surface. Thus, the reaction force when the water surface is pushed acts as a force in a direction to suppress the phenomenon that the stern side of the five-body boat 8 is lowered.

  Accordingly, the stern part is lowered by the vertical swing of the five-hull ship 8, and each time the trim tabs 5d, 5f for vibration reduction provided on the left and right rear side hulls 3d, 3f come into contact with the water surface, As a result, a force in a direction to suppress the pitching is applied, so that the pitching of the five-hull ship 8 is quickly reduced.

  As described above, according to the five-hull vibration reduction apparatus of the present embodiment, each side hull 3c, 3d, 3e, 3f of the five-hull ship 8 is effectively used to make each side hull 3c, 3d, 3e, 3f. By making the trim tabs 5a and 5b for vibration reduction provided on the rear end surface of the rear end of the turret appropriately in accordance with the roll and pitch, it is possible to obtain a rocking effect on the roll and pitch of the five-hull ship 8. it can. Further, when the five-boat 8 rolls sideways, the left and right side hulls 3c, 3d are brought into contact with the anti-vibration trim tabs 5c, 5d, 5e, 5f respectively attached to the left and right side hulls 3c, 3d, 3e, 3f. , 3e, 3f can be applied with a force in a direction to cancel the roll of the five-hull ship 8, so that the lever from the center of the five-hull ship 8 to the point of action of the force can be taken long. A large roll damping effect can be obtained.

Then, FIG. 4 (a) (b) and 5 (b) (b) shows another example of the swinging motion reducing apparatus trimaran as multi hulls, are as follows.

  That is, like the trimaran 1 shown in FIGS. 1 (a) and 2 (b) and FIGS. 2 (a) and 2 (b), a pair of side hulls 3a are provided on both the starboard side and the port side of the main hull 2 at the center. , 3b, a required portion on the outer surface of each of the left and right side hulls 3a, 3b, for example, the outer surface of the rear end of each of the left and right side hulls 3a, 3b. In addition, similarly to the anti-vibration trim tabs 5a and 5b shown in FIGS. 1 (a) and 1 (b) and FIGS. 2 (a) and 2 (b), the anti-vibration trim tabs 9a, 9b is configured to be provided outward in the left-right direction.

  In addition, the same components as those shown in FIGS. 1A and 1B and FIGS. 2A and 2B are denoted by the same reference numerals.

  In the state where the trimaran 1 equipped with the vibration reducing device having the above-described structure is being navigated by a propulsion device (not shown), The left and right anti-shake trim tabs 9 a and 9 b provided on 3 a and 3 b are deployed together by the corresponding actuator 6. As a result, the side hulls 3a or 3b are alternately lowered by the rolling of the trimaran 1 and, for example, when the starboard side hull 3a is lowered by the rolling as shown in FIG. When the vibration reduction trim tab 9a mounted on the outer surface of the rear end portion 3a comes into contact with the water surface and the vibration reduction trim tab 9a presses the water surface, the reaction force lowers the side hull 3a on the starboard side. It acts as a force in the direction to suppress the phenomenon.

  On the other hand, although not shown, when the port-side side hull 3b is lowered due to rolling, when the anti-shake trim tab 9b mounted on the port-side side hull 3b comes into contact with the water surface and pushes the water surface, The reaction force acts as a force in a direction to suppress the phenomenon that the port side side hull 3b is lowered.

  Accordingly, each time the left and right side hulls 3a and 3b are alternately lowered by the rolling of the above-described trimaran 1, each time the vibration reduction trim tabs 9a or 9b provided on the side hull 3a or 3b on the lower side alternately contact the water surface. Since the force in the direction of suppressing the roll is applied to the trimaran 1, the roll of the trimaran 1 is quickly reduced.

  Further, when pitching occurs during the navigation of the trimaran 1, the left and right anti-shake trim tabs 9a and 9b provided on the outer surfaces of the rear ends of the left and right side hulls 3a and 3b are the same as described above. Are deployed together by the corresponding actuator 6. Accordingly, as shown in FIG. 5 (b), when the stern side is lowered as compared with the bow side due to the pitching of the trimaran 1, the side hulls 3a and 3b are respectively provided on the outer surfaces of the rear end portions. When the vibration reduction trim tabs 9a and 9b come into contact with the water surface and push the water surface, the reaction force acts as a force in a direction to suppress the phenomenon that the stern side of the trimaran 1 is lowered.

  Accordingly, the stern part is lowered due to the pitching of the trimaran 1 and the anti-vibration trim tabs 9a, 9b provided on the left and right side hulls 3a, 3b are in contact with the water surface. Since a force in a direction to suppress the pitching is applied, the pitching of the trimaran 1 is quickly reduced.

  As described above, the trimmer ship's vibration reduction device according to the present embodiment can obtain the effect of reducing the horizontal and vertical movements of the trimaran 1 as shown in FIGS. It is possible to obtain the same effects as those in the embodiments 2 Further, when the above-mentioned trimarine 1 rolls, the above-mentioned left and right side hulls 3a and 3b are in contact with each other by water contact of the vibration reduction trim tabs 9a and 9b respectively provided on the outer surfaces of the left and right side hulls 3a and 3b. Since the force in the direction to cancel the roll of the trimaran 1 can be applied, the lever from the center of the trimaran 1 to the point of action of the force can be taken longer, and the roll damping effect can be further increased. It can be good.

6 (a) (b) shows another example of the swinging motion reducing apparatus five hulls as multi hulls, as with five hulls shown in FIG. 3 (a) (b), the main In a five-hull ship 8 comprising a pair of front side hulls 3c, 3e and rear side hulls 3d, 3f on the starboard side and port side of the hull 2, respectively, the rear end outer surface of each side hull 3c, 3d before and after the port side And on the outer side of the rear end of each side hull 3e, 3f on the starboard side, the same as the anti-shake trim tabs 9a, 9b shown in FIGS. 4 (a) (b) and 5 (a) (b) The anti-shake trim tabs 9c, 9d, 9e, 9f are respectively provided outward in the left-right direction.

  In addition, the same components as those shown in FIGS. 4A and 4B and FIGS. 5A and 5B are denoted by the same reference numerals.

6 (a) and 6 (b), when the swaying (rolling) occurs during the navigation of the five-hull ship 8 equipped with the anti-shake device, All of the vibration reduction trim tabs 9c, 9d, 9e, 9f provided on the port side side hulls 3c, 3d, 3e, 3f are developed by the corresponding actuators 6. As a result, when the starboard side hulls 3c and 3d are lowered by the rolling of the five-hull ship 8, the anti-shake trim tabs 9c and 9d provided on the outer surfaces of the rear end portions of the starboard side hulls 3c and 3d are When the water surface is pushed in contact with the surface, the reaction force acts as a force in a direction to suppress the phenomenon that the side hulls 3c and 3d on the starboard side are lowered.

  On the other hand, when the port side side hulls 3e and 3f are lowered due to the rolling of the pentahull ship 8, the anti-shake trim tabs 9e and 9f provided on the port side side hulls 3e and 3f are in contact with the water surface and push the water surface. Then, the reaction force acts as a force in a direction to suppress the phenomenon that the side hulls 3e and 3f on the port side are lowered.

  Therefore, the side hulls 3c, 3d on the starboard side and the side hulls 3e, 3f on the starboard side alternately descend by the rolling of the five-body boat 8, and the vibration reduction provided on the side hulls 3c, 3d or 3e, 3f on the descending side. Each time the trim tabs 9c, 9d or 9e, 9f are alternately in contact with the water surface, a force in a direction to suppress the roll is applied to the five-boat 8, so that the roll of the five-boat 8 is Reduced quickly.

  Further, when pitching occurs during the navigation of the five-hull ship 8, the left and right rear side hulls 3d and 3f as the trim tabs for reducing vibration existing at positions away from the center of swinging of the pitching. The anti-vibration trim tabs 9 d and 9 f provided on the outer surface of the rear end portion are deployed together by the corresponding actuator 6. As a result, when the stern side of the five-hull ship 8 is lowered as compared with the bow side, the anti-shake trim tabs 9d and 9f provided on the outer side surfaces of the rear ends of the rear side hulls 3d and 3f are When the respective trimming trim tabs 9d, 9f press against the water surface, the reaction force acts as a force in a direction to suppress the phenomenon that the stern side of the five-hull boat 8 is lowered.

  Accordingly, the stern part is lowered by the vertical swing of the five-hull ship 8, and each time the trim tabs 9d, 9f for vibration reduction provided on the left and right rear side hulls 3d, 3f come into contact with the water surface, As a result, a force in a direction to suppress the pitching is applied, so that the pitching of the five-hull ship 8 is quickly reduced.

As described above, the anti-vibration effect for the horizontal and vertical swings of the five-hull ship 8 can be obtained also by the five-boat ship's anti-vibration device shown in FIGS. 6 (a) and (b) . The same effect as in the embodiment (b) can be obtained. Further, when the trolley 8 rolls sideways, the water contact of the trimming trim tabs 9c, 9d, 9e, 9f provided on the outer surfaces of the side halves 3c, 3d, 3e, 3f on the starboard side and port side, respectively. Thus, a force in a direction to cancel the roll of the five-hull boat 8 can be applied to the left and right side hulls 3c, 3d, 3e, 3f. The lever can be taken longer and the roll damping effect can be improved.

  Note that the present invention is not limited only to the above embodiment, and the embodiment shown in FIGS. 1 (a) (b) and 2 (a) (b) and FIG. 3 (a) (b) In the embodiment, the trim tab 4 at the stern portion of the main hull 2 is preferably provided, but may be omitted. In this case, the left and right side hulls 3a, 3b or 3c, 3d, 3e, even in a multihull ship of a type in which it is difficult to install the trim tab 4 at the stern of the main hull 2 due to the engagement with the propulsion device, rudder, etc. It becomes possible to obtain the effect of reducing a multihull ship by the trimming trim tabs 5a, 5b or 5c, 5d, 5e, 5f provided on the rear end surface of 3f.

Figure 4 (a) (b) and that shown in FIG. 5 (a) (ii), and, as in those shown in FIG. 6 (a) (ii), provided trim tab 4 at the stern portion of the main hull 2 Also good. Furthermore, on the rear end face of each side hull 3a, 3b or 3c, 3d, 3e, 3f, the embodiment of FIGS. 1 (B), 2 (B), 2 (B), and FIG. You may make it provide the trim tab 5a, 5b or 5c, 5d, 5e, 5f for vibration reduction similar to the embodiment shown in (b).

  Dimensions of the vibration reduction trim tabs 5a, 5b, 5c, 5d, 5e, 5f and the vibration reduction trim tabs 9a, 9b, 9c, 9d, 9e, 9f, the angle at which they are expanded and stored, and the vibration reduction trim tabs 9a, 9b, 9c , 9d, 9e, 9f side hulls 3a, 3b or 3c, 3d, 3e, 3f are attached to the outer surface in the front-rear direction (for example, front, front-rear center, rear, etc.). You may change suitably according to the size of the desired multihull ship and the size of the side hulls 3a, 3b, 3c, 3d, 3e, 3f.

  Of course, various modifications can be made without departing from the scope of the present invention.

FIG. 1 shows a case where the present invention is applied to a trimarine vibration reduction device as an embodiment of a multihull vibration reduction device according to the present invention, wherein (a) is a schematic side view of a trimarine equipped with a vibration reduction device; (B) is a schematic plan view of the trimaran. Fig. 1 shows the state of use of the anti-vibration device of Fig. 1. (a) shows the state of reducing the roll of the trimarine, and (b) shows the state of reducing the vertical shake of the trimaran. It is a schematic side view shown. As another embodiment of the present invention, a case where the present invention is applied to a vibration reduction device for a five-boat ship is shown. (A) is a schematic side view of a five-boat ship equipped with a vibration reduction device, and (b) is the above five It is a schematic plan view of a trunk ship. It shows another example of a trimmer ship's anti-vibration device, (A) is a schematic front view of a trimarine equipped with an anti-vibration device, and (B) is a schematic plan view of the trimaran. Fig. 4 shows the usage state of the vibration reduction device of Fig. 4 (a) is a schematic front view showing the state of reducing the roll of the trimarine, and (b) is the reduction of the vertical vibration of the trimaran. It is a schematic side view which shows the state to perform. 5 shows another example of the vibration reduction device for a five-passenger ship. (A) is a schematic front view of a five-passenger ship equipped with the vibration reduction device, and (b) is a schematic plan view of the five-passenger ship.

Explanation of symbols

1 Trimaran (multi-hull)
2 Main hulls 3a, 3b, 3c, 3d, 3e, 3f Side hulls 5a, 5b, 5c, 5d, 5e, 5f Trimming tabs for vibration reduction 8 Five hulls (multihull)
9a, 9b, 9c, 9d, 9e, 9f Trimming tab for vibration reduction

Claims (1)

On the rear end face of each side hull in a multihull ship provided with a central main hull and side hulls disposed on the left and right sides of the main hull, an anti-shake trim tab is provided rearwardly, and the anti-shake trim tab is The trim tabs for vibration reduction are attached at the waterline level of the side hull on the rear end surface of each side hull or above the waterline level so that the multihull comes into contact with the water surface when it rolls or rolls. A multi-hull anti-vibration device characterized by comprising:

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