CN117222575A

CN117222575A - Ship hull structure and ship

Info

Publication number: CN117222575A
Application number: CN202280028065.XA
Authority: CN
Inventors: 木下克己; 西浦智成; 平泽宏章
Original assignee: IHI Marine United Inc
Current assignee: IHI Marine United Inc
Priority date: 2021-03-12
Filing date: 2022-03-11
Publication date: 2023-12-12
Also published as: JP2022140164A; WO2022191305A1; JP7511512B2; KR20230156380A; JP2024091802A

Abstract

The invention provides a hull structure and a ship capable of reducing the number of hull structural members while suppressing weight increase. The hull structure (2) is provided with a plurality of center tanks (21) arranged along the Center Line (CL) of the hull, and a plurality of wing tanks (22) arranged on both sides of the center tanks (21). The center tank (21) and the wing tank (22) are provided with a transverse bulkhead (21 a) that separates the center tank (21) in the longitudinal direction (X) and a transverse bulkhead (22 a) that separates the wing tank (22) in the longitudinal direction (X) at different positions in the longitudinal direction (X) except for the two end parts in the longitudinal direction (X) of the hull structure (2).

Description

Ship hull structure and ship

Technical Field

The present invention relates to a hull structure and a ship, and more particularly, to a hull structure and a ship capable of reducing the number of hull structural members.

Background

In recent years, there is a strong price competition for ships, and development of ships with strong price competition is desired. For example, patent document 1 discloses a tank structure for a large petroleum tanker, which is provided with: a long partition wall (20) arranged in a long direction of the hull so as to divide the interior of the tank; a plurality of vertical webs (22) joined to the long bulkheads (20) in the height direction of the hull, and having a width of 0.15 to 0.20 times the total height (H) of the tank; and a horizontal beam (24) arranged in the longitudinal direction of the hull, wherein a second reinforcing portion (24 a) is integrally provided at an end portion of the horizontal beam (24), the second reinforcing portion (24 a) gradually increases in width, a free end portion is formed into a circular portion, and the second reinforcing portion (24 a) is coupled to the vertical web (22).

Prior art literature

Patent literature

Patent document 1: japanese patent No. 5746755

Disclosure of Invention

Problems to be solved by the invention

The invention described in patent document 1 aims to improve the structural strength of a box and reduce tie rods arranged between long bulkheads (20). However, the invention described in patent document 1 has a problem in that the weight is easily increased because the horizontal beams are disposed so as to span the hull in the longitudinal direction.

The present invention has been made in view of the above-described problems, and an object thereof is to provide a hull structure and a ship in which the reduction of the number of hull structural members can be achieved while suppressing an increase in weight.

Means for solving the problems

According to the present invention, there is provided a hull structure including a plurality of tanks partitioned in a ship length direction and a ship width direction, the hull structure including: transverse bulkheads separating the tanks in the longitudinal direction of the ship, which are adjacent to each other in the ship width direction, are arranged at different positions in the ship longitudinal direction.

Further, according to the present invention, there is provided a ship having a hull structure including a plurality of tanks partitioned in a ship length direction and a ship width direction, the hull structure including: transverse bulkheads separating the tanks in the longitudinal direction of the ship, which are adjacent to each other in the ship width direction, are arranged at different positions in the ship longitudinal direction.

The transverse bulkheads constituting both end portions of the hull structure may be disposed at the same position in the ship longitudinal direction.

The offset of the transverse bulkhead may be in the range of 0.1 to 0.5 times the tank length.

The offset of the transverse bulkhead may be in the range of 0.2 to 0.5 times the tank length.

The offset of the transverse bulkhead may be in the range of 0.3 to 0.5 times the tank length.

The plurality of tanks may be provided with a cross web or an oscillation bulkhead which can contribute to reduction of rattle.

The plurality of tanks may include strength reinforcing members arranged in the ship width direction.

The plurality of tanks may have a tank length substantially equal to the length of the tank.

Effects of the invention

According to the hull structure and the ship according to the present invention, the transverse bulkheads of the tanks adjacent to each other in the ship width direction at the same position are arranged at different positions in the ship longitudinal direction, so that the transverse bulkheads having high strength can be dispersed, the strength of the hull structure can be improved, and the number of tie rods serving as strength reinforcing members can be reduced. Thus, according to the present invention, the hull structural member can be reduced while suppressing an increase in weight.

Drawings

Fig. 1 is a side view showing a ship according to an embodiment of the present invention.

Fig. 2 is a plan view showing a hull structure according to a first embodiment of the present invention.

Fig. 3 is a cross-sectional view of the hull structure shown in fig. 2, (a) is a cross-sectional view of a, (B) is a cross-sectional view of B, and (C) is a cross-sectional view of C.

Fig. 4 is a partial enlarged view of the hull structure, (a) is a first embodiment, (B) is a first modification of the first embodiment, (C) is a second modification of the first embodiment, and (D) is a third modification of the first embodiment.

Fig. 5 is a partial enlarged view of the hull structure, (a) is a fourth modification of the first embodiment, (B) is a fifth modification of the first embodiment, (C) is a sixth modification of the first embodiment, and (D) is a seventh modification of the first embodiment.

Fig. 6 is a partial enlarged view of the hull structure, (a) is a second embodiment, (B) is a first modification of the second embodiment, (C) is a second modification of the second embodiment, and (D) is a third modification of the second embodiment.

Fig. 7 is a partial enlarged view of the hull structure, (a) is a fourth modification of the second embodiment, (B) is a fifth modification of the second embodiment, (C) is a sixth modification of the second embodiment, and (D) is a seventh modification of the second embodiment.

Fig. 8 is a partial enlarged view of the hull structure, (a) is an eighth modification of the second embodiment, (B) is a ninth modification of the second embodiment, (C) is a tenth modification of the second embodiment, and (D) is an eleventh modification of the second embodiment.

Fig. 9 is a partial enlarged view of the hull structure, (a) is a third embodiment, (B) is a first modification of the third embodiment, and (C) is a second modification of the third embodiment.

Fig. 10 is a partial enlarged view of the hull structure, (a) is a third modification of the third embodiment, (B) is a fourth modification of the third embodiment, and (C) is a fifth modification of the third embodiment.

Fig. 11 is a partial enlarged view of the hull structure, (a) is a fourth embodiment, and (B) is a modification of the fourth embodiment.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to fig. 1 to 11 (B). Fig. 1 is a side view showing a ship according to an embodiment of the present invention. Fig. 2 is a plan view showing a hull structure according to a first embodiment of the present invention. Fig. 3 is a cross-sectional view of the hull structure shown in fig. 2, (a) is a cross-sectional view of a, (B) is a cross-sectional view of B, and (C) is a cross-sectional view of C. In fig. 3 (a) to 3 (C), only half of the ship width direction is shown for convenience of explanation.

As shown in fig. 1, a ship 1 according to an embodiment of the present invention includes: a hull structure 2 arranged in the center of the hull; a bow 3 disposed in front of the hull structure 2; and a stern portion 4 disposed rearward of the hull structure 2. The bow 3 may be provided with, for example, a nose 31 for reducing wave-making resistance. The stern 4 is provided with, for example, propulsion devices (propellers 41), rudders 42, living areas 43, and the like.

The ship 1 is a cargo ship for transporting solid or liquid, and most of the ship is composed of a hull structure 2, except for a bow portion 3 and a stern portion 4. The ship 1 is, for example, a tanker, but is not limited to a tanker.

For example, as shown in fig. 2, the hull structure 2 includes a plurality of center tanks 21 arranged along a hull center line CL and a plurality of wing tanks 22 arranged on both sides of the center tank 21. The center tank 21 and the wing tank 22 are partitioned in the ship width direction Y by a longitudinal partition wall 23 arranged in the ship length direction X.

That is, the hull structure 2 includes a plurality of tanks partitioned in the ship length direction X and the ship width direction Y. In the present embodiment, the tanks adjacent to each other in the ship width direction Y are the center tank 21 and the wing tank 22. The side surface portion 24 and the bottom surface portion 25 of the hull structure 2 may be formed of double bulkheads constituting the hull. In addition, the top 26 of the hull construction 2 may also be formed by the deck that forms the hull.

The center tank 21 and the wing tank 22 are provided with a transverse bulkhead 21a that separates the center tank 21 in the longitudinal direction X and a transverse bulkhead 22a that separates the wing tank 22 in the longitudinal direction X at different positions in the longitudinal direction X, except for both end portions in the longitudinal direction X of the hull structure 2. In fig. 2, a single-dot chain line shown in an X-shape indicates divided regions.

Here, when the tank length (length in the ship length direction X) of the center tank 21 is Lc and the tank length (length in the ship length direction X) of the wing tank 22 is Lw, the tank length Lc and the tank length Lw have substantially the same length in most of the tanks. The term "most" means that the tank length Lc and the tank length Lw may be different in some of the two end portions, the middle portion, and the like of the hull structure 2. The term "substantially the same length" is intended to include variations in the degree of manufacturing errors.

As shown in fig. 2, by arranging the transverse bulkheads 21a of the center box 21 and the transverse bulkheads 22a of the wing boxes 22 so as to be offset in the ship length direction X, the center box 21 and the wing boxes 22 can be arranged to be different from each other or staggered, and the strength of the hull structure 2 can be improved.

The transverse bulkheads (e.g., the bow bulkhead or the cabin front bulkhead) disposed at both ends in the longitudinal direction X are bulkheads that form the entire shape of the hull structure 2, and therefore may be disposed at the same position in the longitudinal direction X. Of course, transverse bulkheads disposed at both ends in the longitudinal direction X may be disposed at different positions in the longitudinal direction X.

A horizontal beam 21b having a horizontal surface may be disposed on the transverse bulkhead 21a of the center box 21. The lateral web 21c for maintaining the structural strength may be disposed on the wall surface of the vertical partition wall 23 constituting the center box 21. The cross web 21c is formed of, for example, a plate material having a vertical plane (YZ plane). By disposing the cross web 21c, the rattling can be reduced.

A horizontal beam 22b having a horizontal plane may be disposed in the lateral bulkhead 22a of the wing tank 22. By disposing the horizontal beam 22b, the structural strength can be maintained. Further, an oscillation bulkhead 22c for reducing rattling may be disposed between the transverse bulkheads 22a constituting the wing tank 22. The bulkhead 22c is a watertight bulkhead, and is formed of a plate material that partially partitions the wing tank 22 in the ship length direction X.

As shown in fig. 3 (a), the wing box 22 at a position corresponding to the transverse bulkhead 21a of the center box 21 includes a space partitioned by a longitudinal partition wall 23, a side surface portion 24, a bottom surface portion 25, and a top portion 26. Further, a deck rail 22d may be disposed above the wing box 22.

As shown in fig. 3 (B), the center box 21 at a position corresponding to the transverse bulkhead 22a of the wing box 22 has a space partitioned by the longitudinal partition wall 23, the bottom surface portion 25, and the top portion 26. Further, a ring-shaped or C-shaped cross ring 21d may be disposed inside the center box 21.

As shown in fig. 3 (C), the oscillation bulkhead 22C is formed of, for example, a plate material connected to the vertical partition wall 23, the side surface portion 24, and the bottom surface portion 25, and is configured to form a space with the ceiling portion 26. Horizontal beams 22e may also be provided in the oscillator bulkhead 22c. The deck cross 22d may be disposed above the wing box 22, or a ring-shaped or C-shaped cross ring 21d may be disposed inside the center room 21.

Next, a tank arrangement structure of the hull structure 2 according to the first embodiment will be described with reference to fig. 4 (a) to 5 (D). Here, fig. 4 is a partial enlarged view of the hull structure, (a) is a first embodiment, (B) is a first modification of the first embodiment, (C) is a second modification of the first embodiment, and (D) is a third modification of the first embodiment. Fig. 5 is a partial enlarged view of the hull structure, (a) is a fourth modification of the first embodiment, (B) is a fifth modification of the first embodiment, (C) is a sixth modification of the first embodiment, and (D) is a seventh modification of the first embodiment. In each figure, for convenience of explanation, the bulkhead is indicated by a broken line, the strength reinforcing member is indicated by a one-dot chain line, and the horizontal beam is indicated by a gray coating.

As shown in fig. 4a, when the tank length Lw (the interval between the transverse bulkheads 22 a) of the wing tank 22 is ten-equally divided, the hull structure 2 according to the first embodiment is configured such that, for example, the offset D between the transverse bulkheads 21a of the center tank 21 and the transverse bulkheads 22a of the wing tank 22 is 0.3 times the tank length Lw. That is, in the first embodiment, d=0.3 Lw is set.

The oscillation wall 22c of the wing box 22 is disposed at a position of 0.5Lw with respect to the transverse wall 22a. The horizontal beams 21b, 22e are disposed on the same side (right side in the figure) with respect to each bulkhead, for example. The horizontal beam 22e of the bulkhead 22c is disposed, for example, on the longer side of the horizontal beam 22b than the horizontal bulkhead 22a or the horizontal beam 22b adjacent to the bulkhead in the ship length direction X.

After the positions of the transverse bulkheads 21a, 22a and the bulkhead 22c are determined, the strength reinforcement members 27 disposed in the ship width direction Y may be disposed as needed. Here, a strength reinforcing member 27 is disposed in the center box 21 at a position corresponding to the approximate middle of the transverse bulkhead 22a and the wash bulkhead 22c. The strength reinforcing member 27 is, for example, a tie rod.

According to the hull structure 2 of the present embodiment, the transverse bulkheads 21a and 22a of the tanks adjacent to each other in the ship width direction Y are arranged at different positions in the ship length direction X, so that the transverse bulkheads 21a and 22a having high rigidity can be dispersed, the strength of the hull structure 2 can be improved, and the number of the strength reinforcing members 27 (tie rods) can be reduced to a minimum required.

As in the first modification of the first embodiment shown in fig. 4 (B), the strength reinforcing member 27 may be disposed in the wing tank 22. The strength reinforcement member 27 is disposed, for example, approximately in the middle between the transverse bulkhead 22a and the bulkhead 22c.

As in the second modification of the first embodiment shown in fig. 4 (C), the strength reinforcing member 27 disposed in the wing tank 22 may be replaced with the nacelle wall 22C. In this case, the horizontal beam 22e of the bulkhead 22c may be disposed on the opposite side (left side in the drawing) to the other horizontal beams 21b and 22b.

As in the third modification of the first embodiment shown in fig. 4 (D), two pieces of the oscillating bulkheads 22C shown in fig. 4 (C) may be combined into one piece in each wing tank 22. In this case, the strength reinforcing member 27 may be omitted depending on the types of steel materials constituting the hull structure 2, the plate thickness, the required strength, and other conditions.

As in the fourth modification of the first embodiment shown in fig. 5 (a), the oscillation wall 21e may be disposed in the center box 21, and the cross web 22f may be disposed in the wing box 22. The oscillator bulkhead 21e is disposed, for example, at a position corresponding to the approximate middle of the cross bulkheads 21a and 22a. The oscillation bulkhead 21e may be provided with a horizontal beam 21f. The lateral web 22f is disposed, for example, on the longitudinal partition wall 23. In the wing tank 22, a strength reinforcing member 27 may be disposed between the transverse bulkheads 22a.

As in the fifth modification of the first embodiment shown in fig. 5 (B), the strength reinforcing member 27 may be disposed in the center box 21. The strength reinforcement member 27 is disposed, for example, substantially in the middle between the transverse bulkhead 21a and the bulkhead 21e. The other structure is the same as that shown in fig. 5 (a).

As in the sixth modification of the first embodiment shown in fig. 5 (C), the strength reinforcement member 27 shown in fig. 5 (B) may be replaced with the oscillation bulkhead 21e. In this case, the horizontal beam 21f of the bulkhead 21e may be disposed on the opposite side (left side in the drawing) to the other horizontal beams 21b and 22b.

As in the seventh modification of the first embodiment shown in fig. 5 (D), two pieces of the oscillation walls 21e shown in fig. 5 (C) may be combined into one piece in the center box 21. In this case, the strength reinforcing member 27 may be omitted depending on the types of steel materials constituting the hull structure 2, the plate thickness, the required strength, and other conditions.

Next, a tank arrangement structure of the hull structure 2 according to the second embodiment will be described with reference to fig. 6 (a) to 8 (D). Here, fig. 6 is a partial enlarged view of the hull structure, (a) is a second embodiment, (B) is a first modification of the second embodiment, (C) is a second modification of the second embodiment, and (D) is a third modification of the second embodiment. Fig. 7 is a partial enlarged view of the hull structure, (a) is a fourth modification of the second embodiment, (B) is a fifth modification of the second embodiment, (C) is a sixth modification of the second embodiment, and (D) is a seventh modification of the second embodiment. Fig. 8 is a partial enlarged view of the hull structure, (a) is an eighth modification of the second embodiment, (B) is a ninth modification of the second embodiment, (C) is a tenth modification of the second embodiment, and (D) is an eleventh modification of the second embodiment.

As shown in fig. 6 (a), the hull structure 2 according to the second embodiment is a structure obtained by changing the positional relationship between the transverse bulkheads 21a and 22a of the center tank 21 and the wing tank 22 from the first embodiment.

When the tank length Lc (the interval between the transverse bulkheads 21 a) of the center tank 21 is ten-fold divided, the hull structure 2 according to the second embodiment is configured such that the offset D between the transverse bulkheads 21a of the center tank 21 and the transverse bulkheads 22a of the wing tank 22 is 0.5 times the tank length Lc, for example. That is, in the second embodiment, d=0.5 Lc is set.

The hull structure 2 according to the second embodiment includes a cross web 21c in the center box 21 and an oscillation bulkhead 22c in the wing box 22. The oscillator bulkhead 22c is disposed at a position corresponding to the cross bulkhead 21a (a position of 0.5Lc relative to the cross bulkhead 22 a). The horizontal beams 21b, 22e are disposed on the same side (right side in the figure) with respect to each bulkhead, for example.

After the positions of the cross bulkheads 21a, 22a and the oscillation bulkhead 22c are determined, the strength reinforcement members 27 may be disposed as needed. Here, two strength reinforcing members 27 are disposed in the center box 21 at positions corresponding to substantially the middle of the transverse bulkhead 22a and the wash bulkhead 22c.

As in the first modification of the second embodiment shown in fig. 6 (B), the strength reinforcing member 27 may be disposed in the wing tank 22. The strength reinforcement member 27 is disposed, for example, approximately in the middle between the transverse bulkhead 22a and the bulkhead 22c. Although not shown, only one of the two strength reinforcing members 27 shown in fig. 6 (a) may be disposed in the wing tank 22.

As in the second modification of the second embodiment shown in fig. 6 (C), only one of the two strength reinforcing members 27 disposed in the center box 21 may be replaced with the oscillation bulkhead 22C disposed in the wing box 22. In this case, the horizontal beam 22e of the bulkhead 22c may be disposed on the opposite side (left side in the drawing) to the other horizontal beams 21b and 22b.

As in the third modification of the second embodiment shown in fig. 6 (D), the strength reinforcing member 27 shown in fig. 6 (C) may be disposed in the wing tank 22.

As in the fourth modification of the second embodiment shown in fig. 7 (a), the strength reinforcement member 27 shown in fig. 6 (D) may be replaced with the oscillation bulkhead 22c.

As in the fifth modification of the second embodiment shown in fig. 7 (B), the strength reinforcing member 27 shown in fig. 6 (a) can be omitted depending on the type of steel material constituting the hull structure 2, the plate thickness, the required strength, and other conditions.

As in the sixth modification of the second embodiment shown in fig. 7 (C), the oscillation wall 21e may be disposed in the center box 21, and the cross web 22f may be disposed in the wing box 22. The oscillator bulkhead 21e is disposed at a position corresponding to the cross bulkhead 22a (a position of 0.5Lc relative to the cross bulkhead 21 a), for example. In addition, a strength reinforcing member 27 may be disposed between the transverse bulkhead 21a and the bulkhead 21e in the center box 21.

As in the seventh modification of the second embodiment shown in fig. 7 (D), the strength reinforcing member 27 shown in fig. 7 (C) may be disposed in the wing tank 22. Although not shown, only one of the two strength reinforcing members 27 shown in fig. 7 (C) may be disposed in the wing tank 22.

As in the eighth modification of the second embodiment shown in fig. 8 (a), the position of the oscillator wall 21e shown in fig. 7 (C) may be changed, and the strength reinforcement member 27 may be changed to one. The oscillation bulkhead 21e is disposed between the transverse bulkhead 21a and the transverse bulkhead 22a, for example. In this case, the horizontal beam 21f of the bulkhead 21e may be disposed on the opposite side (left side in the drawing) to the other horizontal beams 21b and 22b.

As in the ninth modification of the second embodiment shown in fig. 8 (B), the strength reinforcing member 27 shown in fig. 8 (a) may be disposed in the wing tank 22.

As in the tenth modification of the second embodiment shown in fig. 8 (C), the strength reinforcement member 27 shown in fig. 8 (a) may be replaced with the oscillation bulkhead 21e.

As in the eleventh modification of the second embodiment shown in fig. 8 (D), two pieces of the oscillation walls 21e shown in fig. 8 (C) may be combined into one piece in the center box 21. In this case, the strength reinforcing member 27 may be omitted depending on the types of steel materials constituting the hull structure 2, the plate thickness, the required strength, and other conditions.

Next, a tank arrangement structure of the hull structure 2 according to the third embodiment will be described with reference to fig. 9 (a) to 10 (C). Here, fig. 9 is a partial enlarged view of the hull structure, (a) is a third embodiment, (B) is a first modification of the third embodiment, and (C) is a second modification of the third embodiment. Fig. 10 is a partial enlarged view of the hull structure, (a) is a third modification of the third embodiment, (B) is a fourth modification of the third embodiment, and (C) is a fifth modification of the third embodiment.

As shown in fig. 9 (a), the hull structure 2 according to the third embodiment is a structure in which the positional relationship between the transverse bulkheads 21a of the center tank 21 and the transverse bulkheads 22a of the wing tank 22 is changed from the first embodiment.

When the tank length Lw (interval between the transverse bulkheads 22 a) of the wing tank 22 is ten-fold divided, the hull structure 2 according to the third embodiment is configured such that, for example, the offset D between the transverse bulkheads 21a of the center tank 21 and the transverse bulkheads 22a of the wing tank 22 on the upper side in the drawing is 0.3 times the tank length Lw (d=0.3 Lw).

The hull structure 2 according to the third embodiment is configured such that, for example, the offset D between the transverse bulkhead 21a of the center tank 21 and the transverse bulkhead 22a of the lower wing tank 22 is 0.2 times the tank length Lw (d=0.2 Lw).

In this way, in the wing tanks 22 of two rows adjacent to the center tank 21, the transverse bulkheads 22a may be arranged at different positions in the ship length direction X. That is, the value of the offset D of the transverse bulkhead 22a of the wing tank 22 adjacent to the center tank 21 may be different.

The hull structure 2 according to the third embodiment includes a cross web 21c in the center box 21 and an oscillation bulkhead 22c in the wing box 22. The oscillation bulkhead 22c is disposed at a position substantially in the middle of the cross bulkhead 22a (a position of 0.5Lw with respect to the cross bulkhead 22 a). The horizontal beams 21b, 22e are disposed on the same side (right side in the figure) with respect to each bulkhead, for example.

After the positions of the cross bulkheads 21a, 22a and the oscillation bulkhead 22c are determined, the strength reinforcement members 27 may be disposed as needed. Here, a strength reinforcing member 27 is disposed in the center box 21 at a position corresponding to the approximate middle of the transverse bulkhead 22a and the wash bulkhead 22c.

As in the first modification of the third embodiment shown in fig. 9 (B), the strength reinforcing member 27 may be disposed in the wing tank 22. The strength reinforcement member 27 is disposed, for example, approximately in the middle between the transverse bulkhead 22a and the bulkhead 22c.

As in the second modification of the third embodiment shown in fig. 9 (C), the strength reinforcing member 27 disposed in the wing tank 22 may be replaced with the nacelle wall 22C. In this case, the horizontal beam 22e of the bulkhead 22c may be disposed on the opposite side (left side in the drawing) from the other horizontal beams 21b and 22b.

As in the third modification of the third embodiment shown in fig. 10 (a), the oscillation wall 21e may be disposed in the center box 21, and the cross web 22f may be disposed in the wing box 22. The oscillation bulkhead 21e is disposed, for example, at a position substantially in the middle of the upper and lower cross bulkheads 22a and on the side separated from the cross bulkhead 21a (at a position of 0.4Lw relative to the cross bulkhead 21 a). In addition, a strength reinforcing member 27 may be disposed between the transverse bulkhead 21a and the bulkhead 21e in the center box 21.

As in the fourth modification of the third embodiment shown in fig. 10 (B), the strength reinforcing member 27 shown in fig. 10 (a) may be disposed in the wing tank 22. Although not shown, only a part of the three strength reinforcing members 27 shown in fig. 10 (a) may be disposed in the wing tank 22.

As in the fifth modification of the third embodiment shown in fig. 10 (C), the strength reinforcement member 27 shown in fig. 10 (a) may be replaced with the oscillation bulkhead 21e. In this case, the horizontal beam 21f of the bulkhead 21e may be disposed on the same side (right side in the drawing) as the other horizontal beams 21b and 22b, or a part of the horizontal beam 21f may be disposed on the opposite side (left side in the drawing) to the other horizontal beams 21b and 22b.

Next, a tank arrangement structure of the hull structure 2 according to the fourth embodiment will be described with reference to fig. 11 (a) and 11 (B). Here, fig. 11 is a partial enlarged view of the hull structure, (a) is a fourth embodiment, and (B) is a modification of the fourth embodiment.

As shown in fig. 11 (a), the hull structure 2 according to the fourth embodiment is a structure obtained by changing the positional relationship between the transverse bulkheads 21a and 22a of the center tank 21 and the wing tank 22 from the third embodiment. Specifically, the offset D of the transverse bulkhead 22a of the wing tank 22 on the lower side in the diagram shown in fig. 9 (a) is changed to 0.3 times the tank length Lw (d=0.3 Lw).

Therefore, in the hull structure 2 according to the fourth embodiment, the offset D between the transverse bulkheads 21a and 22a of the center tank 21 and the wing tank 22 is the same, but the transverse bulkheads 22a and 22a of the wing tank 22 on the upper side and the wing tank 22 on the lower side are arranged at different positions in the ship length direction X. In this way, the offset D between the transverse bulkheads 21a and 22a can be arbitrarily changed.

The hull structure 2 according to the fourth embodiment includes a cross web 21c in the center box 21 and an oscillation bulkhead 22c in the wing box 22. The oscillation bulkhead 22c is disposed at a position corresponding to the approximately middle of the transverse bulkhead 21a and the transverse bulkhead 22a. The horizontal beam 21f of the bulkhead 21e may be disposed on the same side (right side in the figure) as the other horizontal beams 21b and 22b, or a part of the horizontal beam 21f may be disposed on the opposite side (left side in the figure) to the other horizontal beams 21b and 22b.

In the fourth embodiment shown in fig. 11 (a), the strength reinforcement members 27 are omitted, but the strength reinforcement members 27 may be disposed as needed after the positions of the cross bulkheads 21a and 22a and the oscillation bulkhead 22c are determined.

As in the modification of the fourth embodiment shown in fig. 11 (B), the oscillation wall 21e may be disposed in the center box 21, and the cross web 22f may be disposed in the wing box 22. The oscillation bulkhead 21e is disposed at a position corresponding to the upper and lower transverse bulkheads 22a, for example. The strength reinforcing member 27 may be disposed as needed.

In the first to fourth embodiments (including the respective modifications), the case where the offset D between the transverse bulkheads 21a and 22a is 0.2 times, 0.3 times, and 0.5 times the tank length Lc or the tank length Lw was described, but the offset D is not limited to these values. For example, the offset D may be arbitrarily set in a range of 0.1 to 0.5 times the tank length Lc or the tank length Lw.

In the above embodiment, for convenience of explanation, the offset D is set based on the length of ten equal parts of the tank length Lc or the tank length Lw, but the length of the reference for setting the offset D may be arbitrarily set. The arrangement of the bulkheads 22c, 21e and the strength reinforcement member 27 is not limited to the illustrated embodiment and modification.

In the above embodiment, the hull structure 2 was described as being trisected in the ship width direction Y, but the present invention is not limited to this configuration. The hull structure 2 may be divided into two or four or more in the ship width direction Y, for example.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

Claims

1. A hull structure comprising a plurality of tanks partitioned in a ship length direction and a ship width direction, characterized in that,

the structure comprises the following steps: transverse bulkheads separating the tanks in the longitudinal direction of the ship, which are adjacent to each other in the ship width direction, are arranged at different positions in the ship longitudinal direction.

2. The hull construction of claim 1 wherein,

transverse bulkheads constituting both end portions of the hull structure are disposed at the same position in the ship longitudinal direction.

3. The hull construction of claim 1 wherein,

the offset of the transverse bulkhead is in the range of 0.1 to 0.5 times the tank length.

4. The hull construction of claim 1 wherein,

the offset of the transverse bulkhead is in the range of 0.2 to 0.5 times the tank length.

5. The hull construction of claim 1 wherein,

the offset of the transverse bulkhead is in the range of 0.3 to 0.5 times the tank length.

6. The hull construction of claim 1 wherein,

the plurality of tanks are provided with cross webs or oscillation bulkheads that can help reduce sloshing.

7. The hull construction of claim 1 wherein,

the plurality of tanks are provided with strength reinforcing members arranged in the ship width direction.

8. The hull construction of claim 1 wherein,

the plurality of bins have a bin length of substantially the same length.

9. A ship is characterized in that,

a hull structure according to any of claims 1 to 8.