JPS6060093A - Half-submerged catamaran - Google Patents

Abstract

PURPOSE:To ease the wave impact to which a catamaran is subjected when it is under sail or halted under loading with a helicopter by liftably attaching a wave impact damping member under the central part of a deck on which the helicopter can ride. CONSTITUTION:An elevator deck 12 is mounted on the upper hull 4 of a half- submerged catamaran so as to allow a helicopter 13 to be placed thereon. A wave impact damping member 18 is attached under the central part of the upper hull 4 via links 19a and 19a and operating mechanisms 20a and 20b as the member can be lifted up and down and fixed at an arbitrary position. If the catamar an with a helicopter 13 loaded thereon sails on the sea, the wave impact damping member 18 is fixed at an upper position so as to ease the wave impact against the upper hull 4 and prevent damages of the instruments mounted on the hericopter 13. When the catamaran is stationary, the wave impact damping member 18 is fixed at a lower position so as to prevent unnecessary pitching movement, whereby enabling the helicopter 13 of landing on and off even in stormy weather.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semi-submerged catamaran suitable for carrying a helicopter, and more particularly to a semi-submerged catamaran capable of alleviating wave impact on the bottom of the vessel.

Figures 1 to 4 show a conventional semi-submerged catamaran in which a pair of left and right submerged bodies and an upper hull are each connected by one strut.

Furthermore, FIGS. 5 and 6 show a conventional semi-submerged catamaran in which a pair of left and right submerged bodies and an upper hull are connected by two struts, respectively.

Here, Figure 1.5 is a side view, and Figure 2 is a side view of Figure 1.
3 is a sectional view along the line, FIG. 3 is a sectional view showing the state in which the helicopter is stored from the state in FIG. 2, and FIG. 4 is a sectional view taken from the state shown in FIG.
6 is a cross-sectional view taken along line -IV, and FIG. 6 is a cross-sectional view taken along line Vl-Vl in FIG.

In Figures 1 to 6, 1 is the upper hull, 1' is the lower surface of the upper hull, 1'' is the elevator plate holder, 2Jl, 21
+ means submerged body, 3 a, 3 b, 3 a', 3 b
' is the pillar, 4 is the superstructure, 5a, 5b are prohela, 6a
, 6b is the rudder, 7a+7b is the front hydrofoil, 8a, 81+ is the rear hydrofoil, 9 is the waterline, 1o is the flying room, 11 is the helicopter deck, 12 is the elevator plate, 13 is the helicopter, and 114 is the cover. , 15 is a helicopter storage space, 1
6a, 16b, 16a', 16b' are waves generated inside the catamaran, 17a + 17b + 17a' + 17
b' is a wave generated on the outside of the catamaran, and A is wave 16a.

16b, A' is the merging point of waves 16a' and 161+', and B is the merging point after waves 16a+16b' are reflected by the support. The subscript a in each code indicates the port side, and b indicates the starboard side. Showing the side.

A helicopter deck 11 is formed at the top of the upper hull 1 of the semi-submerged catamaran, and an opening is provided in the center of the deck. , 1 & 12 of these double level helicopters are disposed so as to fit into the opening and form the same plane as the helicopter deck 11, allowing the helicopter 13 to take off or land on the ship.

In addition, as shown in FIG. 3, by lowering the single elevator plate 12 to the portion 1'' of the single elevator plate holder on the upper surface of the upper hull 1, the helicopter 13 is surrounded by the superstructure 4. The helicopter can be stored in the helicopter storage space 15.

In this way, semi-submerged catamarans have a large deck area and are less susceptible to movement in waves (especially while sailing), making them slightly smaller than general monohull vessels. A helicopter 13 can be mounted on a semi-submerged catamaran of the same size.

However, in a semi-submerged catamaran, waves such as those shown in Figures 4 and 6 are generated mainly from the struts 3a, 3b, 3a', and 3b' that penetrate the water surface. When added, both polymerize to form A, A', 13
The wave surface is at its highest near the point where the upper hull 1
A severe impact may be generated on the lower surface 1' of the

When the frequency of this wave impact increases, it not only increases the discomfort, but also causes damage to the upper hull 1 and disrupts the operation of various instruments and devices, resulting in operational problems for the ship. Particularly when the helicopter 13 is housed in the helicopter storage space 15, there is a risk that the helicopter 13 and its mounted instruments will be damaged by wave impact.

In addition, while a semi-submerged catamaran has significantly less hull motion during cruising than a typical monohull, the damping force is smaller when the vessel is at rest than when it is cruising, so it does not sway in waves. It does not necessarily result in a significant reduction, and there remains the drawback that it is difficult to reduce the double-lower movement, which affects the ability of helicopters to take off and land, which is often done while the ship is sailing at slow speed or when the ship is stationary. However, the advantage of semi-submerged catamarans, which is less hull sway, has not been fully utilized.

In view of the above-mentioned points, the present invention is designed to alleviate the wave impact on the hull of a semi-submerged catamaran equipped with a helicopter while it is sailing, and to reduce the vibration of the ship while the ship is in operation or stopped. , IX's objective is to provide semi-submersible catamarans.

Therefore, the semi-submerged catamaran of the present invention has a pair of left and right submerged bodies located below the water surface, one upper hull located above the water surface, and a pair of left and right submerged bodies located below the water surface. In a semi-submerged catamaran, the semi-submerged catamaran is provided with one or more pairs of supports each connected to the submerged body of the vessel, and a deck consisting of one plane is provided at the top of the upper hull, and an elevator is provided in the center of the deck. A wave impact mitigation member is provided on the lower surface of the center of the upper hull, the wave impact mitigation member is arranged to be movable in the vertical direction, and means is provided for fixing the wave impact mitigation member at a predetermined position. It is characterized by the fact that

An interlocking mechanism is provided that lowers or pulls up the wave impact mitigation member as the base plate rises or falls, respectively.

Hereinafter, a semi-submerged catamaran as an embodiment of the present invention will be explained with reference to the drawings. Figures 7 to 14 show the first embodiment, and the price is $15.16! @2 This shows the 718th example.
115. Figure 16 is a side view, Figure 9 is Figure 7 (7) IX-
tIS10 is a cross-sectional view taken along line XX in FIG. FIGS. 13 and 14 are cross-sectional views showing an enlarged part of the cross-section along the line, and are cross-sectional views similar to FIG. 12 showing a modified example of the wave impact mitigation member.

The same reference numerals as those already described indicate the same parts, and the reference numeral 18 denotes a wave impact mitigation member, 19a.
, 19b is a link mechanism, 20a+20[+ is a servo ring -121, 21', 21a, 21b is an outer frame, 22
．． 22' is a damping plate, and 22'' is a wire mesh.

First, the first embodiment shown in FIGS. 7 to 14 will be explained.
This embodiment relates to a semi-submerged catamaran in which a pair of left and right submerged bodies 2a, 2b and one upper hull 1 are connected by one strut 3a, 3b, respectively.

As shown in FIGS. 7 and 9, the lower surface 1 of the central part of the upper hull 1
' is equipped with a wave impact mitigation member 18, and normally '
It is installed close to the lower surface 1' of the two-part hull 1.

However, when the ship is stationary or when sailing at low speed, especially helicopters,
When performing 13 take-off and landing, servo sill 20a
, 20b, the link extends the sides 19a, 19b, lowers the wave impact mitigation member 18 to a position below the waterline 9, as shown in FIGS. , 20b and link mechanism 1
It can be fixed with 9a and 19b.

In addition, as shown in FIG. 11.12, the wave impact mitigation member 18 has an outer frame 21.
It is composed of a plurality of damping plates 22 installed at an angle inside the damping plate 22.

In addition, as the wave impact mitigation member 18, the 12th
As shown in the figure, damping plates 22' are arranged in a staggered manner, or as shown in Fig. 14, a plurality of wire meshes 22'' are stretched in layers instead of the damping plates 22. Good too.

This wave 1! The range in which the TII impact mitigation member 18 is provided is, in the maximum case, the range surrounded by the pillars 3a and 3b in the width direction, and in the front and back direction, including the two parts of point A shown in FIG. Make it a range that has sufficient length, or
Usually front hydrofoils 7a+7b and rear hydrofoils 8a, 8
Limited to the range between 1+.

Furthermore, an interlocking mechanism (not shown) is provided which lowers or pulls up the wave impact mitigation member 18 as the elevator plate 12 moves up or down, respectively.

In addition, FIGS. 7 and 9 show a state in which the one-elevator plate 12 is lowered and the helicopter coupe 13 is accommodated in the helicopter storage space 15, and FIGS. 8 and 10 show the one-elevator plate 12.
The figure shows a state in which the helicopter 13 is placed on the helicopter deck 11 after being raised until it reaches the helicopter deck 11.

As mentioned above, since the wave impact mitigation member 18 is normally installed close to the lower surface 1' of the central part of the upper hull 1, waves may be applied to the lower surface 1' of the upper hull while cruising in waves. Even if a collision occurs, the waves are decelerated and attenuated by the wave impact mitigation member 18, reducing the impact of waves on the lower surface 1', thereby preventing damage to the upper hull and various instruments and devices. It is possible to eliminate irregularities in the operation of M.

In particular, even if the helicopter 13 is accommodated within the helicopter storage space 15, there is no risk of damage.

In addition, as shown in FIGS. 8 and 10, the wave impact mitigation part 4
'4' By lowering and fixing the helicopter 18 to a position below the waterline 9, the damping force against the ship's motion, especially vertical movement, when the ship is stopped or sailing at slow speeds is greatly increased, so the helicopter 13 can be used even on sea surfaces with large waves. can take off and land without any trouble.

Furthermore, the above-mentioned effects can be further ensured by interlocking the raising or lowering of the single elevator plate 12 with the lowering or lifting of the wave impact mitigation member 1B, respectively.

On the other hand, by utilizing the fact that the moving direction of the wave impact mitigation member 18 is opposite to the moving direction of the elevator single plate 12,
The wave impact mitigation member 18 may be used as a pilot weight for one elevator board 12.

With this configuration, the movement of the elevator can be made smoother, and the power necessary for raising and lowering the elevator can be reduced. Moreover, when using an independent elevator balance weight, the weight can be reduced.

15 and 16 show a second embodiment of the present invention, in which a pair of left and right submerged bodies 2a, 2b and one upper hull 1 are supported by two supports 3a, 3b, 3, respectively. a
This relates to a semi-submerged catamaran connected by ', 3 b'.

In this second embodiment, as in the first embodiment, a wave impact mitigation part 18 is provided on the lower surface 1' of the central part of the upper hull 1, and link mechanisms 19a, 19b and a servo cylinder 20 are provided.
a.

201), the same effects as in the first embodiment can be obtained.

As detailed above, according to the semi-submerged catamaran of the present invention,
It is possible to effectively reduce the impact of waves on the vessel's performance when sailing in rough weather, which not only makes it possible to significantly improve the safety of the semi-submerged catamaran, but also contributes to improved ride comfort. At the same time, there is no risk of damage to the helicopter being accommodated.

Furthermore, by lowering and fixing the wave impact mitigation member below the water surface, the ship's vibration, especially vertical movement, when stopped or sailing at low speed in waves is greatly damped, so the helicopter can take off and land even in waves. This allows the ship to sail without any problems.

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional semi-submerged catamaran, with Figure 1 being a side view, Figure 2 being a sectional view taken along line 11-n in Figure 1, and Figure 3 being a cross-sectional view taken along line 11-n in Figure 1. Figure 4 is a cross-sectional view taken along line 1v-IV in Figure 1, and Figures 5 and 6 are views of a conventional semi-submerged catamaran in a pond. FIG. 5 is a side view thereof, FIG. 6 is a sectional view taken along the line Vl-Vl in FIG. 5, and FIGS. It shows the double-hulled body 11j'l, and Figure 7.8 is its side view, and Figure 9 is 1 of Figure 7.
A cross-sectional view along the x-IX line, Fig. 10 is the XX of the Tf3 diagram.
11 is a perspective view showing the wave impact mitigation part 4=4, and FIG. 12 is an enlarged sectional view showing a part of the cross section along the line X1l-Xll in FIG. 11, ffs 13
, 1 = 4 is a cross-sectional view showing a modified example of the wave impact mitigation member in the same way as FIG. It shows,
Figures 15 and 16 are side views thereof. 1... Upper hull, 1'... Lower surface of upper hull, 1''...
1 elevator plate holder part, 2a, 2b... submerged wood, 3a
. 3b, 38', 31)'...Strut, 4...Superstructure, 5
a, 5b... propeller, 6a, 6b... rudder, 7a, 7b
・・Front hydrofoil, iJa+81+・・Rear hydrofoil, 9・
・Waterline, 10...Control A5.11...Helicopter deck, 12...One elevator board, 13...Helicopter
114... Cover, 15... Helicopter storage space, 1
6a, 16b', 16a'. 16b'... Waves generated inside the catamaran, 1.7a,
J 7 b+] 7a' + 17b'...Waves generated on the outside of the catamaran, 18...Wave shock mitigation part shrine, 1
9a, 191+... link mechanism, 20a, 20b...
Servo Schilling-12], 21'. 21a, 21b... Outer frame, 22.22' -- Damping plate, 22''... Wire mesh. Sub-Agent Yoshihiko Iinuma Figure 1 Figure 2 Figure 1 S Figure 7 Figure 8 - X Ren

Claims (1)

[Claims] (1) A pair of left and right submerged bodies located below the water surface, one two-part hull located above the water surface, and one or more pairs that penetrate the water surface and connect the upper hull to the left and right pair of submerged bodies, respectively. In a semi-submerged catamaran, which has a deck consisting of one plane at the two most parts of the upper hull, and an elevator at the center of the deck, the lower central surface of the upper hull. It is characterized by being equipped with a wave impact mitigation part shrine, the wave impact mitigation member being disposed so as to be movable in the vertical direction, and a means for fixing the wave impact mitigation member in a predetermined position. A semi-submerged catamaran. (2. In the semi-submerged catamaran according to claim 1, the interlocking mechanism lowers or raises the wave impact mitigation member as the base plate rises or falls, respectively. A semi-submerged catamaran characterized by being equipped with a