JPH06247379A - Hull transverse bulkhead structure - Google Patents

Abstract

PURPOSE:To eliminate high stress which in a hull transverse bulkhead structure suitable for use in a tanker was conventionally generated at the tie-in portion of the lower end of a vertical warp-proof material extending along a hull center line and a bottom structural member, particularly owing to a difference in loaded state between tanks in front of and behind a hull transverse bulkhead. CONSTITUTION:In a hull transverse bulkhead 6, part of the lower end portion of a center-line vertical warp-proof material 8 extending along a hull center line 1 is removed and plural stages of horizontal warp-proof material 12 are used to warp-proof the removed part of the transverse bulkhead 6. Even if one of tanks in front of and behind the transverse bulkhead 6 is full and the other is empty, high stress which was conventionally generated at the tie-in portion of the lower end of the center-line vertical warp-proof material 8 and the upper end of a center-line large bracket 11 is completely eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal bulkhead structure for a hull, and more particularly to a horizontal bulkhead structure suitable for use in a tanker.

[0002]

2. Description of the Related Art A conventional hull transverse bulkhead structure in a tanker is shown in FIGS. 7, 8 (A-A sectional view of FIG. 7) and 9 (B-B sectional view of FIG. 7). The horizontal bulkhead 6 is equipped with a large number of vertical stiffening members 7 and 8 extending in the vertical direction for its stiffening and a plurality of horizontal girders 9 and 10 horizontally extending, A centerline large bracket 11 connecting the lowermost horizontal girder 10 and the ship bottom member 3 is arranged along the hull centerline 1. A centerline vertical stiffener 8 as one of the vertical stiffeners along the hull centerline 1 is arranged from the upper deck member 2 to the lowermost horizontal girder 10. In addition, the code | symbol 4 in FIGS. 7-9 shows a ship side outer plate, 5 has shown the longitudinal partition.

[0003]

By the way, in the conventional hull transverse bulkhead structure as described above, the centerline vertical stiffener 8 of the tank on the bow side and the tank on the stern side which are partitioned by the transverse bulkhead 6 is used. If the tank on the side where the horizontal girders 9 and 10 and the centerline large bracket 11 are present is filled with crude oil and the other tank is left empty, the horizontal bulkhead 6 will become a centerline vertical stiffener. 8 is pushed toward the empty tank side together with 8, while the bottom member 3 of the fully loaded tank is pushed downward together with the centerline large bracket 11 and the lowermost horizontal girder 10, the lower end of the centerline vertical stiffener 8 And the connecting part C between the horizontal girder 10 at the bottom
High stress is generated (see FIG. 8). In addition, the tank on the side where the above-mentioned members 8 to 11 are present is emptied,
Even if the tank on the opposite side is filled with crude oil, the horizontal bulkhead 6 is pressed together with the centerline / vertical stiffener 8 toward the empty tank side, so that high stress is generated in the joint C. .

The present invention is intended to solve the above-mentioned problems, and a centerline vertical stiffener is lacking in the vicinity of the joint between the lowermost horizontal girder and the centerline large bracket. Then, by performing the horizontal stiffening of the lateral bulkhead in the lacking part,
It is an object of the present invention to provide a hull transverse bulkhead structure capable of preventing a high stress from being generated in the vicinity of the joint portion.

[0005]

In order to achieve the above-mentioned object, a hull transverse bulkhead structure of the present invention has a structure in which a plurality of vertical vertical walls extending in the vertical direction are provided in the horizontal bulkhead of the hull in order to prevent the lateral bulkhead from bending. A stiffener and horizontally extending horizontal girders are mounted, and a centerline large bracket that connects the bottom horizontal girder and the bottom member is arranged along the hull centerline. The lower end of the centerline vertical stiffener, which is one of the vertical stiffeners along the centerline of the ship, is located near the joint between the centerline large bracket and the bottom horizontal girder. A plurality of horizontal stiffeners that extend horizontally for stiffening the horizontal bulkhead are provided between the left and right vertical stiffeners adjacent to the horizontal stiffener. It is characterized by being installed side by side.

[0006]

In the horizontal hull bulkhead structure of the present invention described above, even if one of the tanks on the bow side and the stern side, which are partitioned by the horizontal bulkhead, is full and the other is empty, the centerline vertical stiffening is performed. Since the lower end of the material is missing near the joint between the centerline large bracket and the bottom horizontal girder, the centerline vertical stiffener and the bottom horizontal girder as before The situation that high stress is not generated at the joint part of the horizontal line is completely eliminated, and the lateral bulkheads in the part where the centerline vertical stiffener is lacking can be stiffened by the horizontal stiffeners arranged in parallel. become.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A horizontal hull bulkhead structure as an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view thereof, FIG. 2 is a sectional view taken along the line A--A of FIG. 1, and FIG. -B sectional view, FIG. 4 is a front view showing an enlarged main part of FIG. 1, FIG. 5 is an AA sectional view of FIG. 4, and FIG. 6 is a BB sectional view of FIG. As shown in FIGS. 1 to 3, the horizontal bulkhead 6 of the hull of the tanker
In order to prevent the lateral bulkhead 6 from being stiffened, a large number of vertical stiffening members 7 and 8 extending in the vertical direction and a plurality of horizontally extending horizontal girders 9 and 10 (three in this embodiment). And are installed.

A centerline large bracket 11 connecting the lowermost horizontal girder 10 and the bottom member 3 is
It is arranged along the hull centerline 1. Further, as one of the vertical stiffeners, a centerline vertical stiffener 8 along the hull centerline 1 extends from the upper deck member 2 to the lowermost horizontal girder 10. The lower end of 8 is missing near the joint between the lowermost horizontal girder 10 and the centerline large bracket 11. That is, in this embodiment, the lower end portion of the centerline vertical stiffener 8 is missing between the lowermost horizontal girder 10 and the horizontal girder 9 immediately above it.

As described above, the centerline vertical stiffener 8
In the portion where the horizontal stiffener 6 is absent, a plurality of (four in this embodiment) horizontal stiffeners 12 that extend horizontally for stiffening of the horizontal bulkhead 6 are adjacent to the same stiffener 12 and are left and right vertical stiffeners. The horizontal stiffeners 12 are arranged in parallel with each other and fixed to the horizontal partition 6 and each vertical stiffener 7. Also in the present embodiment, reference numeral 4 in the drawing denotes a ship side outer plate, and 5 denotes a longitudinal partition wall. 4 to 6 show the detailed structure of the mounting portion of the horizontal stiffener 12, which rises from the upper surface of the uppermost horizontal stiffener 12 along the center line of the hull on the surface of the horizontal bulkhead 6 and directly above it. One upper header extending along the underside of the girder 9.
13 is provided, and a pair of left and right lower headers 14 that descend from the lower surface of the lowermost horizontal stiffener 12 along the surface of the horizontal bulkhead 6 and extend along the upper surface of the lowermost horizontal girder 10 are provided. ing.

Since the hull transverse bulkhead structure in the tanker as one embodiment of the present invention is constructed as described above,
Even if one of the tanks on the bow side and the stern side partitioned by the horizontal bulkhead 6 is full and the other is empty, the lower end of the centerline vertical stiffener 8 is the centerline large bracket 11 Since it is missing in the vicinity of the joint between the lowermost horizontal girder 10 and the centerline vertical stiffener 8 and the lowermost horizontal girder 10 as in the conventional case (reference numeral in FIG. The situation in which a high stress occurs in C) is completely eliminated.

That is, since the structure near the lower end of the centerline vertical stiffener 8 is not directly connected to the lowermost horizontal girder 10 as in the conventional case, two tanks partitioned by the horizontal bulkhead 6 are used. Due to the difference in the loading state of the horizontal line 6, even if the centerline vertical stiffener 8 integrated with the horizontal bulkhead 6 is displaced relative to the centerline large bracket 11 integrated with the bottom member 3 and the horizontal girder 10 at the bottom, The phenomenon of stress concentration as in the past does not occur. Then, the lateral partition walls 6 are prevented from being stiffened in a portion where the centerline vertical stiffener 8 is absent by the horizontal stiffeners 12 arranged in parallel.

[0012]

As described in detail above, according to the hull transverse bulkhead structure of the present invention, the following effects can be obtained. (1) Even if one of the tanks on the bow side and the stern side, which are partitioned by the horizontal bulkhead, is full and the other is empty, the lower end of the centerline vertical stiffener is the centerline large bracket. Since it is in a state of being missing near the joint between the bottom horizontal girder and the bottom girder, high stress is generated at the joint between the centerline vertical stiffener and the bottom horizontal girder as in the past. Disappears at all. (2) The horizontal bulkheads are stiffened in a part where the centerline vertical stiffeners are absent by the horizontal stiffeners arranged in parallel.

[Brief description of drawings]

FIG. 1 is a front view showing a hull transverse bulkhead structure as one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an enlarged front view of the main part of FIG.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is a front view showing a conventional hull bulkhead structure.

8 is a cross-sectional view taken along the line AA of FIG.

9 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Center line of hull 2 Upper deck member 3 Ship bottom member 4 Ship side plate 5 Longitudinal bulkhead 6 Horizontal bulkhead 7 Vertical stiffener 8 Centerline vertical stiffener 9 Horizontal girder 10 Bottom horizontal girder 11 Centerline large bracket 12 Horizontal stiffener 13 Upper header 14 Lower header

Front Page Continuation (72) Inventor Teruyuki Maeda 1-1, Atsunoura-machi, Nagasaki City Mitsubishi Nagasaki Shipyard Main Building Nagasaki Rishige Engineering Co., Ltd. (72) Inventor Ken Tanaka 1-1, Atsunoura-cho, Nagasaki City Mitsubishi Nagasaki Shipbuilding Main office Nagasaki Ryoju Engineering Co., Ltd.

Claims (1)

[Claims] 1. A horizontal bulkhead of a hull is provided with a plurality of vertical stiffeners extending in the vertical direction and a plurality of horizontal girders extending horizontally for stiffening the horizontal bulkhead. , A centerline large bracket that connects the bottom horizontal girder and the bottom member is arranged along the centerline of the hull, and the centerline vertical bracket is one of the vertical stiffeners along the centerline of the hull. The lower end of the stiffener is lacking in the vicinity of the joint between the centerline large bracket and the horizontal girder at the bottom, and the lacking part extends horizontally to stiffen the horizontal bulkhead. A horizontal hull bulkhead structure, wherein a plurality of existing horizontal stiffeners are arranged in parallel between the left and right vertical stiffeners adjacent to the horizontal stiffener.