JPH0367916B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-speed boat used for maritime transportation of passengers and the like.

Conventionally, various technological developments have been made to increase the speed and improve ride comfort of ships used for maritime transportation such as passengers, and the ship shape shown in Figure 1 (perspective view) is an example of a semi-submersible type ship. They are called catamarans, and are designed to reduce the vertical motion of the hull by reducing the area of the waterline and providing a large displacement below the water surface. In addition, all W in the figure indicates a water line.

However, in such a semi-submersible catamaran, the flooded area is double that of a normal monohull, and the depth of the torpedo-shaped buoyancy-generating submerged body a cannot be made deeper due to water restrictions. Due to the generation of wave-making phenomena during navigation and the interference between the wave-making phenomena on the left and right sides, the ship requires approximately twice as much propulsion horsepower as a normal monohull ship, which poses an economical problem for operation. be.

Furthermore, when driving in rough weather, there are problems in terms of strength, such as the possibility that the wave front will impact the part b that connects the left and right fuselages, and that a torsional moment will act on that part b.

In addition, as shown in Figure 2 (perspective view), a hull type called a trimaran (semi-submerged trimaran) is also being considered, which is designed to reduce hull motion like the semi-submerged catamaran. Compared to the above-mentioned catamaran, this trimaran type has three torpedo-shaped buoyancy-generating submerged bodies, so waves generated during travel by the single buoyancy-generating submerged body c at the front are This affects the two buoyancy-generating submerged bodies d at the rear, increasing the propulsive horsepower, and since there are three buoyancy-generating submerged bodies c, d, and d, the hull The problem is that it tends to become unstable.

Therefore, as shown in Figure 3 (perspective view), the Gie-Tronzier-Rauenborg type high-speed boat was developed as an improved version of the trimaran, and the two-legged part at the rear was changed from a torpedo shape to a normal catamaran shape. By changing the shape to a corner-like shape, the hull is stabilized while sailing.

However, in this GIE-Tronzier-Rauenborg type high-speed boat, it is expected that the boat's propulsion horsepower will be significantly increased.

Furthermore, as another type of boat, there is a single-hull high-speed boat as shown in Figure 4 (perspective view), and this high-speed boat has been used for a long time because the propulsion horsepower is reduced by gliding on the water surface. Since the hull movement during waves is large, there is a problem with the comfort of the ship on routes to remote islands in the open sea, and its use as a passenger ship is particularly limited.

The present invention aims to solve the above-mentioned problems, and provides a hull form of a high-speed boat that reduces the hull motion of the high-speed boat during sailing and improves its propulsion efficiency. The purpose is to

For this reason, the hull shape of the high-speed boat of the present invention includes a plate-shaped bow member that protrudes forward along the center plane of the hull so as to cut through the water surface, and has a buoyant force at the lower end of the plate-shaped bow member below the water surface. It is characterized by being equipped with a submerged body for generating water, and a sliding surface formed on the lower surface of the wide rear part of the hull, with the center of the floating surface located aft of the 1/3 length of the ship's length from the stern end.

Hereinafter, the hull form of a high-speed boat as an embodiment of the present invention will be explained with reference to the drawings. FIG. 5 is a perspective view thereof, and FIG. 6 is a sectional view taken along the - arrow in FIG. 5.

As shown in Figures 5 and 6, at the front end of the hull,
A plate-shaped bow member 1 protruding forward of the hull along the center plane of the hull is disposed so as to cut through the water surface, and the lower end of the plate-shaped bow member 1 below the water surface has a length extending to near the center of the hull. A torpedo-shaped submerged body 2 for generating buoyancy is provided.

The living area 5 on the upper deck of the hull is located relatively rearward so as to be protected from large waves, and a pair of left and right flares 4 are formed on the hull sides 3, and these flares 4 are 1/ of the captain from the front end of
It is provided so that it increases rapidly toward the rear around the third position.

As shown in Fig. 5, the rear half of the hull is wide, and a sliding surface 6 is formed on its lower surface. It is formed so that it is located further back than the other parts.

In other words, the hull shape of the high-speed boat of the present invention is extremely narrow at the front part in the waterline plane, and the rear part is as wide as the width of the boat. 7 is the base and the bow end is the apex, and the shape of the waterline surface is actually wider at the rear than the above triangle, and the front end is pointed, so the center of the floating surface of this high-speed boat is at the stern. It is constructed so that it is located further back than 1/3 of the length of the ship from end 7.

Further, the sliding surfaces 6 are formed as a pair of elongated left and right surfaces like water skis, limited to the vicinity of the port and starboard sides of the lower surface of the rear half of the hull.

Note that this high-speed boat is configured as a two-shaft boat, and two propulsors 8 are disposed below the rear half of the hull.

Since the hull shape of the high-speed boat of the present invention is constructed as described above, during sailing, the weight of the front portion of the hull is supported by the buoyancy of the torpedo-shaped submerged body 2 for generating buoyancy. Therefore, there is no need for the rear running surface 6 to support the entire weight of the high-speed boat as in the planing state of a normal single-hull high-speed boat, and it is not necessary to make the running surface 6 small like the above-mentioned water ski type. It becomes possible. In this way, the smaller the sliding surface, the lower the frictional resistance with the water surface, and the more the propulsion horsepower can be reduced.

Since the plate-shaped bow member 1 which also serves as a strut is provided in the front half of the hull, the bow part is allowed to plunge directly into the waves, and this allows the bow part to move up and down during the waves. The relative acceleration between the wave front and the bow flare due to movement can be reduced.

In addition, the rear half of the hull is not a trimaran type but a single-hull normal high-speed boat type, and this high-speed boat can be sailed in a planing state, so it can be used for the above-mentioned semi-submersible catamaran, trimaran type and its improved type. Compared to the GIE-Tronzier-Rauenborg type high-speed boat, it is possible to significantly reduce the propulsion horsepower, and it is possible to obtain a propulsion efficiency close to that of a normal high-speed boat.

Furthermore, since the plate-shaped bow member 1 is formed in the front half of the hull, and the rear half of the hull is formed in the same way as a normal ship, the center of the floating surface is located further back than in the conventional case. 1/3 of the captain from the stern
Since the center of the floating surface is located aft of the section, it is extremely easy to control the longitudinal attitude of the hull, and the optimal sailing attitude can be maintained at all times.

Conventional large high-speed passenger boats currently in service do not reach a fully planing state due to the relationship between speed and hull length, but are in a semi-planing state. Since the part that forms the hull is limited to the rear half of the hull, the hull is actually shorter in terms of propulsion performance.
Therefore, it is easy to reach a complete sliding state, which is extremely advantageous in terms of propulsion efficiency.

As detailed above, according to the hull form of the high-speed boat of the present invention, the plate-shaped bow member is provided so as to protrude forward along the center plane of the hull and cut through the water surface. A submerged body for generating buoyancy is provided at the lower end of the vessel under the water surface, and a sliding surface is formed on the lower surface of the rear half of the wide hull, with the center of the buoyancy being located aft of the 1/3 length of the ship's length from the stern end. With this simple configuration, it is possible to reduce the hull motion in waves during navigation, which has been a problem in the past, and has the advantage of significantly improving propulsion efficiency.

[Brief explanation of drawings]

Figures 1 to 4 all show the hull form of a conventional high-speed boat. Figure 1 is a perspective view of a semi-submersible catamaran, and Figure 2 is a trimarathon (semi-submersible trimaran). ), Figure 3 is a perspective view showing the hull form of a G-Tronzier-Rauenborg type high-speed boat, Figure 4 is a perspective view showing the hull form of a single-hull high-speed boat, and Figures 5 and 6 are 5 is a perspective view thereof, and FIG. 6 is a sectional view taken along the line -- in FIG. 5, showing the shape of a high-speed boat as an embodiment of the invention. 1... Plate bow member, 2... Torpedo-shaped submerged body for generating buoyancy, 3... Hull side part, 4... Flare,
5... Living area, 6... Running surface, 7... Stern end, 8
...propeller, W...water line.

Claims (1)

[Claims] 1. It has a plate-shaped bow member that protrudes forward along the center plane of the hull and is arranged so as to cut through the water surface, and also has a submerged body for generating buoyancy at the lower end of the plate-shaped bow member below the water surface, and has a wide width. A high-speed boat with a planing surface formed on the lower surface of the rear half of the hull, with the center of the floating surface located further back than 1/3 of the length of the captain from the stern end.