JPS59186792A - Reinforcement method for longitudinal strength of hull - Google Patents

Abstract

PURPOSE:To increase flexural strength of a hull and improve a reinforcement effect and use a box-shaped section also as hatch coamings and further realize utilization of its interior as a passage, storage, wiring and a pipe duct by arranging a longitudinal strength member, forming the box-shaped section along with the uppermost deck, in the longitudinal direction of the hull in one body on the uppermost deck. CONSTITUTION:A box-shaped section 6 is formed on the uppermost deck 2 as a longitudinal strength member, installed on a hull at the time of executing the hull extension work and the like, and arranged in the longitudinal direction of the hull. An outside wall 7 of the box-shaped section 6 forms the uppermost part of the outer plate 3, while an inner side wall 8 is also used as a side wall of hatch coamings, and the upper end part of said section 6 has the same height as that of the upper surface of the hatch cover 10. The section 6 can be utilized as a passage, storage, wiring and a piping duct, while a container and the like can be mounted on it due to its same height as that of the hatch cover 10. In addition to the above, the section 6 can effectively increase the flexural strength of the hull.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hull longitudinal strength reinforcing knob method useful for large-scale hull expansion work for antenna-only vessels, hulk carriers, tankers, and the like.

Conventionally, when extending the hull of an existing ship to enlarge it or replacing the medium-sized hull with a new one, as shown in Figures 1 to 3, <1 = 1. Heavy board c, d
(shown with hatching) was removed to compensate for the lack of longitudinal strength of the hull. However, according to this method, double clad plates c, dO) lf
In many cases, there are restrictions on where R-I-J can be installed, and a sufficient reinforcement effect cannot be expected, so it may not be possible to apply it to large-scale ships (4).

In addition, in order to stack cargo such as container C on the reinforced 4th floor a, there is a recess where a special support member f must be sunk by 1, which may have the disadvantage that lateral movement becomes 1 [. there were. In addition,
Line number g. h indicates the hull center r2.

The present invention was created in order to eliminate the drawbacks mentioned above in (n)I, and was designed to form a single-layer deck with a strength of 1 111J and 1r Strength 111 (This is related to a method of reinforcing the longitudinal strength of the hull that effectively utilizes the internal space surrounding the hull, and the cross-sectional shape of the longitudinal strength member is 111.
Since it is formed in the 11-inch shape, it is possible to effectively increase the strength of the hull 14 using a small amount of material, and has the advantage that it is possible to expand the hull 14 with a small amount of material.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings. Figures 4 to 7 show a first embodiment in which the method of the present invention is applied to the hull extension work of a container ship. teeth"
2nd deck, 3 is outer plate, 4 is new hull extension iN! I (shown by hatching in Figure 7), 5 is the 1st hull section,
”: The longitudinal strength member 6 forming a box-shaped cross section together with the deck 2,
On the upper deck 2 near the ship PA11, there is an ink cut integrally extending all the way over the upper deck 2 in the longitudinal direction of the hull.
(shown by hatching in Figure 7).

Then, the outer ff1ll wall 7 of the 844 strength member forms a key 16 for the h-1-i't1+ of the outer panel 3, and the inner 11111 wall 8
The 111II wall of Hatch Co-mink is also used, and the upper plate 9
is set to be approximately the same height as the 4th song on Hatchcover 10. In addition, the code|symbol 11 shows a ship, and 1 and k show a hull centerline.

Also, I: fi! t J) ii 9 has strength 111 (material 6 and surrounding internal space 1
'74311114 leading to No. 3, and handrails 15 of the 1 type are provided in consideration of the convenience of cargo handling.The row side walls 7 are provided with handrails 15 to the extent that strength is not affected An opening 16 for lighting or ventilation is provided.

Furthermore, space 13 is used for multiple purposes, such as passage for the crew, storage for small items, and space for guiding piping and wiring.
It plays the role of ensuring safe passage of ＼ and facilitating inspection and maintenance of piping, layout, etc.

The soil mf plate 9 of the hr1 strength member is set at almost the same height as the top surface of the hatch cover 10, and together with the batch cover lO, it provides a cargo loading space. Container 17 can be loaded on b'J,
There is no reduction in cargo as seen in conventional container ship hull extension work.

Moreover, when this method is used, the longitudinal strength member 6 is the "second deck 2".
Since the box-shaped girder is integrated with the upper deck 2, it is not a scale that has excellent longitudinal strength as a strength member itself.
Since the strength member is located farthest from the bending center of the hull cross section, it effectively increases the bending section modulus of the hull.

? f is iI + Niki's -472'fl? Whereas the method is limited to small-scale hull extensions 1: i;, using this method it is possible to significantly lengthen and enlarge the hull m).

(・A1) An example of light fB 2 is shown in FIG. This example has the advantage that IUφ1: The outer wall 7a of the claw member is moved slightly inward from the ship's side and fixed on the upper deck 2, making the dovetail work easier.

Note that the present invention is not limited to the embodiments described above, and for example, the present method may be used as a bulk carrier.

Hull extension work for tankers or new ship lla
! It goes without saying that this may be applied to r*Yang Jin, and that various other uses may be added within the scope of the vague concept.

The hull longitudinal strength reinforcing method of the present invention is based on the configuration described in n1j and 4i.
Therefore, the following excellent effects are achieved.

(i) 'd1i strength fill material constitutes a longitudinal girder with a box-shaped cross section on the L-most layered plate, so it can effectively increase the bending section modulus of the hull and maximize the reinforcing effect using a small amount of material. be able to demonstrate

(ii) major hull lengthening as a result of section (i) Da I;
Expansion] [Small force (ii) capability, and also provides 1M of useful design methods for hull construction d1 of tli shipbuilding.

(iii) For the same reason as in item (1), the inner 1111+ space surrounded by the silicon strength member can be effectively used for passages and other purposes.

(1ψ For the same reason as No. (i) JJ-, the upper surface of the n-i strength member can be used as a cargo loading area on deck 1, and the cargo loading space due to the hull extension work will be less than μA.

(By using the 1I11 wall inside the Ir1 strength member as a hatch coaming and J(!), and setting the height of the H tile Y strength member to the same level as the batch cover,
;IJ, 1. The space near the ship's side of the layer deck can be used for +1ψ as a place to install reinforcing members,
iIψ can exert a reinforcing effect on people.

[Brief explanation of the drawing]

Figures 1 to 3 show a conventional method for reinforcing the longitudinal strength of a ship. FIG. 3 is a partially enlarged arrow view from the Ill-ill force direction in FIG. 1, and FIGS.
Fig. 4 is a side view of a container ship, Fig. 5 is a partial view taken from the V-V direction in Fig. 4, and Fig. 6 is a side view of the container ship. 7 is a side view of the container ship, and FIG. 8 is a cross-sectional view of part 11 of the container ship showing the second embodiment of the present invention. In the figure, 2 is -1; deck, 6 is a longitudinal strength member, 7 and 7a are outer walls, 8 is an inner wall, 9 is a soil P81 (board, 13 is an inner i'f
i+Small the space (1st and 5th editions 1911 People I 1 Kawabai Kama Heavy Industries Co., Ltd. Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1) AilJ: Longitudinal strength r +++ a which forms a box-shaped cross section with the layer deck is placed integrally on the top layer deck mJ,
njI Note n (Hull t4 characterized by effectively utilizing the internal space surrounded by the strength members for multiple purposes: (Strength reinforcement method.