JPS58209678A - Method of reconstructing hull - Google Patents

Abstract

PURPOSE:To improve load capacity and stability with easy construction, by connecting a part of a narrow old hull, which remains by cutting away a forward portion of the old hull, on the stern side with a wide newly constructed hull on the bow side, and thereafter attaching bulge-like structures onto both sides of the narrow hull. CONSTITUTION:A wide newly constructed hull 1 on the bow side is connected at c with a part of a narrow old hull 2, which remains by cutting away a forward portion of the old hull and includes an engine section, on the stern side. Then, in order to match the width of both hulls, bulge-like structures 3a and 3b are attached onto a part of both sides of the old hull 2 to utilize the interior spaces thereof as a buoyancy tank. With this constitution, the stability of a ship may be improved and the same degree of performance as with a wide newly constructed ship may be obtained with easy design and construction.

Description

[Detailed description of the invention] The present invention relates to a method for modifying a ship's hull.

Conventionally, when carrying out enlargement and modification of the hull by making use of the engine section, a stone hull (
J section The hull 12 was welded to a welding table a, new outer panels 14 and 14 were attached, and the fairing section 6 was formed.

Therefore, conventional methods for modifying the hull [,
As the construction work became more complex, it was not possible to obtain sufficient cargo capacity and righting performance after modification, and in history, the resistance of ships was increased due to long fairings and the generation of vortices, etc. There were disadvantages such as a decrease in the propulsion force of the ship.

The present invention eliminates the drawbacks of the conventional methods as described above, and facilitates design and construction for modification of ship hulls.
The object of the present invention is to provide a method for modifying a ship hull that improves the cargo capacity and stability of the ship after modification.

That is, the present invention connects a narrow hull with the front part of the hull cut and removed to a wide bow hull, and then connects both sides of the narrow hull in order to match the width of the hull. A bulge-like structure is added to the ship's side.

Embodiments of the present invention will be described below based on the drawings. 6th
．． Figure 4 shows an embodiment of the present invention, in which a wide newly built hull 1 is placed on the light side, and a narrow stone hull 2 with the front part of the hull cut and removed to make use of the engine section is placed on the stern side. After connecting the wide hull 1 and the narrow stone hull 2, bulge-like structures 3a and 3b are installed on both sides of the narrow stone hull 2 in order to match the width of the hull. Add.

The outer panels of the bulge-shaped structures 3a and 3b form part of the hull outer panel, and the interior thereof is a space.

Since the present invention has a configuration as described in HiJ, it has the following effects.

The first is that bulge-like structures are added to both sides of the narrow hull without making any modifications or changes to the wide bow hull, making it easier to design and construct the hull for modification. become.

Second, since there is space inside the bulge-like structure, the bulge-like structure can be plowed as a buoyancy tank, improving the ship's stability and achieving the same level of performance as a wide new ship. can have.

Thirdly, since the inside of the bulge-like structure is a space, the inside of the bulge-like structure can be used as a ballast tank, a pump room, and other auxiliary equipment rooms.

Fourth, since bulge-like structures are added to both sides of the narrow stern hull, the stern can be regarded as the skeg of a wide ship, and this creates a butt-flow ship wall with a skeg that has less resistance. This results in improved propulsion performance.

[Brief explanation of the drawing]

Figure 1 is a flat 11 yen diagram of the hull after modification by a conventional hull modification method, Figure 2 is a sectional view of the hull shown in Figure 1 viewed from the stern, and Figure 6 is a diagram of the hull according to the present invention. FIG. 4 is a plan view of the hull after modification by the modification method, and is a sectional view of the hull shown in FIG. 3 viewed from the stern side. 1...Wide hull, 2...Narrow hull with the front part of the forebody cut and removed, 3a, 3b.../Wedge-shaped structure. Agent Patent Attorney Sanro Kimura Figure 1 Figure 2 Figure 3 Figure 4?

Claims (1)

[Claims] After connecting the narrow hull with the front part of the Mi-hull cut and removed to the wide light-side hull on the stern side, a bulge-like structure was installed on both sides of the narrow hull in order to match the width of the hull. A method for modifying a ship's hull, characterized by adding a structure.