JPH06191467A - Hull plate structure reinforced by deflection proof member - Google Patents

Abstract

PURPOSE:To provide a hull plate structure which is excellent in strength reliability and processability by eliminating stress concentration with each deflection proof member continuously secured without being combined with big frames, eliminating a need for welding a number of the deflection proof members to big frames while being combined therewith, which are used to be so so far, and thereby enabling automatic continuous welding to a great extent. CONSTITUTION:This invention is concerned with a hull plate structure which includes each big frame 3 disposed over a plate 1 such as a deck and the like at large intervals, and also includes each deflection proof member 2 disposed between the big frames 3 at small intervals where to let the deflection proof members 2 widely meander between the big frames 3 without being brought into contact with the big frames 3, and also without being combined with the big frames, so that the deflection proof members are disposed into a winding shape. This constitution thereby eliminates a need for combining each deflection proof member 2 with each big frame 3 for welding them together, which is used to be so far, and enables each deflection proof member 2 to be continuously and automatically welded, so that manhours required can thereby be reduced to a great extent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull flat plate structure capable of significantly automating welding of a stiffener which is reinforced by a stiffener constituting a hull structure.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a deck structure of a conventional car carrier, (a) is a plan view, (b) is a cross-sectional view taken along CC line,
6C is a sectional view taken along the arrow DD, and FIG. 6 is an enlarged view of the E portion (slot structure) of FIG. 6C. As shown in these figures, the flat plate structure such as the deck 1 constituting the hull structure is reinforced by the stiffeners 2 provided at small intervals, while the stiffeners 2 are orthogonal to this and at coarse intervals. The large bone (web) 3 provided supports the large bone penetrating portion (slot structure) 4. At the penetrating portion 4 in the large bone 3 of the stiffener 2,
(c) thru | or the slot hole 5 shown in FIG. 6 is opened in the large bone 3, and the stiffener 2 has penetrated this slot hole 5. As shown in FIG. The stiffener 2 is attached to the deck 1 by welding, and at the penetrating portion 4 as well, the boundary portion 6 with the large bone 3 is welded and wound back.

[0003] As a prior art describing a hull flat plate structure including such a slot structure, an actual Kaihei 1-141193 is known.
No. 2-40696 publication.

[0004]

As shown in FIG. 6, the slot structure of the large bone penetrating portion 4 of the stiffener 2 is complicated, and the number thereof is very large in the entire ship. It requires a lot of work.

Further, as shown in FIG. 6, there is a portion 7 where stress concentration occurs at the edge of the slot hole 5, and this is also a weak point in terms of fatigue strength. Many damage accidents have been reported. 8 indicates a crack.

Further, the welded portion 9 of the stiffener 2 to the flat plate (deck) 1 is blocked by the large bone 3 and the stiffener 2 can be continuously welded only within the interval between the large bones 3. It is a major obstacle to automation.

The present invention has been made in view of the above-mentioned conventional problems, and by providing the stiffeners almost continuously without competing with the large bone, it is possible to perform continuous automatic welding substantially without stress concentration points. An object is to provide a flat plate structure for a hull.

[0008]

To achieve the above object, a hull flat plate structure reinforced by a stiffener according to the first aspect of the present invention has a large bone arranged on a flat plate such as a deck at large intervals, and the large bone. In a hull flat plate structure having a stiffener provided at a small interval therebetween, the stiffener is meandered between the large bones without contacting the large bones, and the stiffeners are continuously provided in a zigzag shape. Characterize.

A second aspect of the present invention is a hull flat plate structure having a large bone arranged on a flat plate such as a deck at a large interval and a stiffener provided at a small interval between the large bones. It is characterized in that it is formed in a curved frame shape, and the stiffening material in the closed frame shape is arranged at a predetermined interval between the large bones without contacting the large bones.

A third aspect of the present invention is a hull flat plate structure having large bones arranged on a flat plate such as a deck at large intervals and stiffening members provided at small intervals between the large bones. Formed in a frame shape, the stiffeners are arranged at regular intervals between the rectangular frame-shaped stiffeners to form a skeleton, and the skeletons are provided at predetermined intervals between the large bones without contacting the large bones. It is characterized in that it is provided.

[0011]

With the above construction, the range in which automatic welding can be continuously performed is increased, and particularly when the stiffener is continuous in a zigzag shape, continuous welding can be performed from the beginning to the end, resulting in a large number of man-hours. Exert a reduction effect.

Since the supporting load of the stiffener is separated by a distance such that the bending portion of the stiffener and the large bone can be automatically welded, the load is smoothly transmitted to the large bone through the flat plate portion. It Since the stiffener does not penetrate the large bone, the complicated slot structure is eliminated, there is no part where stress concentration occurs in the large bone, the soundness of the large bone is secured, and the strength and reliability of the flat plate structure of the ship are secured. Property (fatigue strength) is improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 (a) to 1 (d) show a first embodiment of the present invention.
(a) is a plan view of the hull flat plate structure, (b) is a sectional view taken along the line AA,
(c) is a cross-sectional view taken along the line BB, and (d) is an enlarged plan view of the F portion of (a). As shown in FIG. 1, large bones 3 are arranged at large intervals on a flat plate 1 such as a deck constituting a hull structure.
And, without touching the large bone 3 between the large bones 3,
A stiffener 2 is provided continuously in a zigzag shape by making a large meander to reinforce the flat plate 1. The bent portion of the stiffener 2 is arranged in contact with the large bone 3 so as not to engage with the large bone 3 and with a certain distance L from this.

That is, as shown in the partially enlarged view of (d), the stiffener 2 extending in the direction orthogonal to the large bone 3 has a large radius with a corner R by drawing an arc on the front side of the large bone 3. In a similar manner to the large bone on the other side which is extended in the direction parallel to the bone 3 and which further draws an arc and has a corner R to extend straight again in parallel with the above-mentioned stiffener. It is provided. Normally D = 800 to 1000 mm, L is the minimum distance that the automatic welding machine can travel (usually 100 mm)
It is taken. Thus, since the stiffener 2 is continuous without being attached to the large bone 3, continuous automatic welding can be performed from the beginning to the end, resulting in a great reduction in man-hours.

In the above structure, the supporting load of the stiffener 2 is
Since the distance between the stiffener 2 and the large bone 3 is made small, the supporting load can be smoothly transmitted to the large bone 3 via the flat plate portion (shaded portion in the drawing) 1a near the large bone. There is. In this case, since a large area can be secured between the stiffener 2 and the large bone 3, the supporting load of the stiffener 2 is transmitted to the large bone 3 without any problem.
There is no functional difference from the conventional slot structure. In addition, the bending radius 2a of the stiffener 2 has a radius of curvature R
The stress is prevented from being concentrated here.

FIG. 2 shows a second embodiment. Similar to the first embodiment, large bones 3 are arranged at large intervals on a flat plate 1 such as a deck constituting the hull structure. The stiffener 2 is meandered in a large zigzag shape and continuously in a zigzag shape without contacting the large bone 3 to reinforce the flat plate 1. The bent portion of the stiffener 2 is arranged in contact with the large bone 3 so as not to engage with the large bone 3 and with a certain distance L from this. The first embodiment is an example in which there are two bent portions of the stiffener, but the second embodiment is a case where one bent portion is provided. That is, in this example, the distance D between the stiffeners 2 is the same as that in the first embodiment, and the difference is that the stiffeners are connected by connecting them with a large radius of curvature R.
In this case, the load transmission area to the stiffener 2 and the large bone 3 becomes small, but if D = 800 to 1000 mm and R = D / 2,
The supporting load of the stiffener 2 does not cause any problem, and the flat plate portion (the hatched portion in the figure)
It is transmitted to the large bone 3 through 1a.

In the third embodiment of FIG. 3, the stiffener 2 is formed into a closed frame shape, and in this example, the stiffener 2 is formed into an elliptical shape, and the elliptical stiffener 2A is formed into the large bone 3. This is an example in which the flat plate 1 is reinforced by being provided at predetermined intervals. In this case as well, the arcuate portion secures a distance L through which the automatic welding machine can pass without coming into contact with the large bone 3.

In the fourth embodiment of FIG. 4, the stiffener is formed into a large rectangular frame shape by rounding the four corners, and several rectangular frame-shaped stiffeners 2B are arranged at predetermined intervals. The stiffeners 2C are arranged in parallel to form a skeleton made of the stiffener, and the skeleton of the stiffener is provided between the large bones 3 at a predetermined interval. The outer stiffener 2A can be continuously automatically welded. The stiffener 2C in the frame may be welded to the outer stiffener 2B at the factory in advance.

[0019]

The complicated work of welding the stiffener to the large bone is eliminated, and the proportion of automatic welding of the stiffener is significantly increased.
When the stiffener is meandered and continuously provided in a zigzag shape, continuous automatic welding can be performed from the beginning to the end of the stiffener, and the number of steps can be significantly reduced.

Since the conventional complicated slot structure can be eliminated, there is no stress concentration point in the large bone, the strength and soundness of the large bone is secured (the fatigue strength is improved), and the flat plate structure of the hull is obtained. Is very reliable in terms of strength and has excellent workability.

[Brief description of drawings]

1 (a) to (d) are the first embodiment of the present invention, (a) is a plan view of a hull flat plate structure, (b) is a sectional view taken along the line AA, and (c) is B-.
FIG. 3D is a sectional view taken along the arrow B, and FIG.

2A and 2B are a second embodiment of the present invention, FIG. 2A is a plan view of a flat plate structure of a ship, and FIG. 2B is an enlarged plan view of a G part in FIG. 2A.

FIG. 3 is a plan view of a hull flat plate structure according to a third embodiment of the present invention.

FIG. 4 is a plan view of a hull flat plate structure according to a fourth embodiment of the present invention.

5 (a) to (c) are conventional hull flat plate structural views, (a) is a plan view, (b) is a cross-sectional view taken along the CC line, and (c) is a cross-sectional view taken along the DD line.

FIG. 6 is an enlarged view of a portion E in FIG.

[Explanation of symbols]

 1 ... Deck (flat plate) 2 ... Stiffener 2A-2C ... Stiffener 3 ... Large bone

Claims (3)

[Claims] 1. A hull flat plate structure having a large bone arranged on a flat plate such as a deck at a large interval and a stiffener provided at a small interval between the large bones, wherein the stiffener is attached to the large bone. A hull flat plate structure reinforced by a stiffener, characterized in that it is meandered between the large bones without contact and is continuously provided in a zigzag shape. 2. A hull flat plate structure having large bones arranged on a flat plate such as a deck at large intervals and stiffening members provided at small intervals between the large bones, wherein the stiffening material is a closed frame shape. Formed into
A hull flat plate structure reinforced by the stiffener, wherein the closed frame-shaped stiffener is arranged at a predetermined interval between the large bones without contacting the large bones. 3. A hull flat plate structure having large bones arranged at large intervals on a flat plate such as a deck and stiffeners provided at small intervals between the large bones, wherein the stiffener is formed into a rectangular frame shape. Formed,
The stiffeners are arranged at regular intervals between the rectangular frame-shaped stiffeners to form a skeleton, and the skeletons are arranged at predetermined intervals between the large bones without contacting the large bones. A hull flat plate structure reinforced by stiffeners.