Bulwark structure at the mutation of the outer plate

Abstract

The present invention discloses a bulwark structure at the mutation of the outer plate, which comprises a bulwark plate arranged on the outer side of the outer plate of the bulwark at the lower part of the superstructure; the bulwark plate is arranged on the top deck; the bulwark plate is rectangular; the top of the bulwark plate is flush with the deck one layer above the top deck; the bottom of the bulwark plate is connected to the outer plate of the ship's hull outside the top deck; a plurality of first vertical stiffeners are fixedly arranged on the bulwark plate, and the first vertical stiffeners are respectively aligned with the vertical main ribs located below the top deck; through holes are formed in the bulwark plate between adjacent first vertical stiffeners; second vertical stiffeners are arranged between the through holes and the first vertical stiffeners; transverse stiffeners are arranged on the upper side of the through holes; both the second vertical stiffeners and the transverse stiffeners are fixedly arranged on the bulwark plate. The present invention can effectively improve the stress distribution, reduce the stress concentration and the occurrence of cracks, and there is no need to thicken the plate thickness significantly.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and particularly relates to a bulwark structure at the sudden change of the outer plate. Background Art

[0002] In the existing ro-ro passenger ship, the superstructure area is generally slightly shorter than the ship length, especially at the front end and the rear end, and the surrounding outer plate is not adopted. The superstructure of some ro-ro passenger ships is only distributed at the front end or the rear end of the ship, and the length of the superstructure is much less than the ship length.

[0003] Due to the influence of longitudinal strength, stress concentration will occur at the interruption of the superstructure structure of the ro-ro passenger ship (i.e., the sudden change of the outer plate), and cracks are likely to appear. The existing solutions, such as Figure 1 shown in the figure, a bulwark plate 10 is arranged on the outer side of the bulwark outer plate 11 of the superstructure. The bulwark plate 10 is arranged on the top deck 12, and the outer contour of the bulwark plate 10 adopts an arc design to facilitate the release of stress. However, for the existing such solution, the stress release effect is not very ideal, cracks will still appear, and in addition, the thickness of the bulwark plate needs to be greatly increased, resulting in an increase in the ship weight. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects existing in the prior art and provide a bulwark structure at the sudden change of the outer plate.

[0005] The present invention solves the above technical problem through the following technical solutions:

[0006] A bulwark structure at the sudden change of the outer plate, which includes a bulwark plate arranged on the outer side of the bulwark outer plate at the lower part of the superstructure; the bulwark plate is arranged on the top deck; a plurality of vertical main ribs located below the top deck are fixedly arranged on the outer hull plate outside the top deck; the bulwark plate is rectangular; the top of the bulwark plate is flush with the upper deck of the top deck; the bottom of the bulwark plate is connected to the outer hull plate outside the top deck; a plurality of first vertical stiffeners are fixedly arranged on the bulwark plate, and the first vertical stiffeners are respectively aligned with the vertical main ribs located below the top deck; through holes are arranged between adjacent first vertical stiffeners on the bulwark plate; second vertical stiffeners are arranged between the through holes and the first vertical stiffeners; a transverse stiffener is arranged on the upper side of the through holes; both the second vertical stiffeners and the transverse stiffeners are fixedly arranged on the bulwark plate.

[0007] The first vertical stiffener is a T-shaped section.

[0008] Both the second vertical stiffeners and the transverse stiffeners are rectangular plates.

[0009] The second vertical stiffener is located between the transverse stiffener and the top deck. The upper end of the second vertical stiffener is fixedly connected to the transverse stiffener, and the lower end of the second vertical stiffener is not connected to the top deck.

[0010] The horizontal stiffener and the first vertical stiffener are not connected.

[0011] The through hole is rectangular, and the four corners of the through hole are chamfered.

[0012] The length of the bulwark plate is greater than 5 meters.

[0013] The height of the bulwark plate is greater than 2 meters.

[0014] The bulwark plate and the outer bulwark plate at the lower part of the superstructure are connected by welding.

[0015] The bulwark plate and the outer bulwark plate at the lower part of the superstructure are integrally formed.

[0016] The beneficial effects of the present invention are as follows: The bulwark structure of the present invention, by setting the bulwark plate with openings as an extension of the outer bulwark plate at the lower part of the superstructure, can effectively improve the stress distribution of the outer bulwark plate at the lower part of the superstructure, reduce stress concentration and the occurrence of cracks. The bulwark plate of the present invention has a thickness much smaller than that of the existing bulwark plate with an arc-shaped end edge. In the present invention, the through holes of the bulwark plate can be as large as possible to reduce the weight of the bulwark plate, thereby reducing the weight of the ship. The required structural thickness of the present invention is small, which is convenient for shipyard construction and reduces the construction cost; it not only ensures the structural safety but also reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the existing bulwark structure.

[0018] Figure 2 It is a schematic diagram of the structure of the preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following is a preferred embodiment, and the present invention will be described more clearly and completely with reference to the accompanying drawings.

[0020] As Figure 2 shown, a bulwark structure at the sudden change of the outer plate includes a bulwark plate 30 provided on the outside of the outer bulwark plate 23 at the lower part of the superstructure. The bulwark plate 30 is provided on the top deck 20; a plurality of vertical main ribs 22 located below the top deck are fixedly provided on the outer hull plate 21 outside the top deck.

[0021] The bulwark plate 30 is rectangular; the top of the bulwark plate 30 is flush with the deck above the top deck 20; the bottom of the bulwark plate 30 is connected to the outer hull plate 21 outside the top deck.

[0022] A plurality of first vertical stiffeners 41 are fixedly provided on the bulwark plate 30, and the first vertical stiffeners 41 are respectively aligned with the vertical main ribs 22 located below the top deck.

[0023] Through holes 40 are formed between adjacent first vertical stiffeners 41.

[0024] A second vertical stiffener 42 is provided between the through hole 40 and the first vertical stiffener 41.

[0025] A transverse stiffener 43 is provided on the upper side of the through hole 40; both the second vertical stiffener 42 and the transverse stiffener 43 are fixedly provided on the bulwark plate 30.

[0026] The first vertical stiffener 41 is a T-shaped section.

[0027] Both the second vertical stiffener 42 and the transverse stiffener 43 are rectangular plates.

[0028] The second vertical stiffener 42 is located between the transverse stiffener 43 and the top deck 20. The upper end of the second vertical stiffener 42 is fixedly connected to the transverse stiffener 43, and the lower end of the second vertical stiffener 42 is not connected to the top deck 20.

[0029] The transverse stiffener 43 and the first vertical stiffener 41 are not connected.

[0030] The through hole 40 is rectangular, and the four corners of the through hole 40 are chamfered structures.

[0031] In this embodiment, the length of the bulwark plate 30 is greater than 5 meters; the height of the bulwark plate 30 is greater than 2 meters.

[0032] The bulwark plate 30 and the bulwark outer plate 23 at the lower part of the superstructure are connected by welding; alternatively, the bulwark plate 30 and the bulwark outer plate 23 at the lower part of the superstructure are integrally formed.

[0033] One end of the bulwark plate 30 is connected to the bulwark outer plate at the lower part of the superstructure, and the other end of the bulwark plate 30 is connected to the railing on the top deck.

[0034] The bulwark structure of the present invention, by providing the bulwark plate with openings, as an extension of the bulwark outer plate at the lower part of the superstructure, can effectively improve the stress distribution of the bulwark outer plate at the lower part of the superstructure, reduce the stress concentration and the occurrence of cracks.

[0035] Through structural stress calculation, the thickness of the bulwark plate of the present invention is much smaller than the thickness of the existing bulwark plate with an arc-shaped end edge.

[0036] The bulwark structure of the present invention can increase the length of the bulwark plate as required to more effectively release stress. After the extension of the grillage structure for a certain distance, the stress is released slowly and effectively, and the plate thickness does not need to be thickened significantly.

[0037] In the present invention, the through holes of the bulwark plate can be as large as possible to reduce the weight of the bulwark plate, thereby reducing the weight of the ship.

[0038] The required structural thickness of the present invention is relatively small, which is convenient for shipyard construction and reduces the construction cost; it not only ensures the structural safety but also reduces the construction cost.

[0039] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An outboard mutation bulwark structure, which comprises a bulwark plate arranged on the outer side of the outboard plate of the bulwark at the lower part of the superstructure; the bulwark plate is arranged on the top deck; a number of vertical main ribs located below the top deck are fixedly arranged on the outer hull plate outside the top deck; it is characterized in that, The side wall panel is rectangular; the top of the side wall panel is flush with the upper deck of the top deck; the bottom of the side wall panel is connected to the outer hull plate outside the top deck; several first vertical stiffeners are fixedly arranged on the side wall panel, and the first vertical stiffeners are respectively aligned with the vertical main ribs located below the top deck; through holes are formed between adjacent first vertical stiffeners on the side wall panel; second vertical stiffeners are arranged between the through holes and the first vertical stiffeners; a horizontal stiffener is arranged on the upper side of the through hole; both the second vertical stiffeners and the horizontal stiffener are fixedly arranged on the side wall panel; the first vertical stiffener is a T-shaped section; the height of the side wall panel is greater than 2 meters.

2. The bulwark structure at the mutation of the outer plate as described in claim 1, wherein Both the second vertical stiffener and the horizontal stiffener are rectangular plates.

3. The bulwark structure at the mutation of the outer plate according to claim 1, characterized in that, The second vertical stiffener is located between the horizontal stiffener and the top deck, the upper end of the second vertical stiffener is fixedly connected to the horizontal stiffener, and the lower end of the second vertical stiffener is not connected to the top deck.

4. The bulwark structure at the mutation of the outer plate as described in claim 1, characterized in that, The horizontal stiffener is not connected to the first vertical stiffener.

5. The bulwark structure at the mutation of the outer plate as described in claim 1, characterized in that, The through hole is rectangular, and the four corners of the through hole are chamfered structures.

6. The bulwark structure at the mutation of the outer plate according to claim 1, characterized in that The length of the side wall panel is greater than 5 meters.

7. The bulwark structure at the mutation of the outer plate as described in claim 1, characterized in that, The connection between the side wall panel and the outer hull plate at the lower part of the superstructure is a welded connection.

8. The bulwark structure at the mutation of the outer plate according to claim 1, characterized in that, The side wall panel and the outer hull plate at the lower part of the superstructure are integrally formed.

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