Sawtooth-shaped anti-slapping structure

Abstract

The invention discloses a zigzag anti-slapping structure. The zigzag anti-slapping structure comprises a deck widening box-shaped part arranged on the outer side of a hull outer plate; a bottom plate is arranged at the bottom of the deck widening box-shaped part and fixedly connected to a hull outer plate. The bottom plate comprises a plurality of inclined plates; the plurality of inclined plates are sequentially connected to form a sawtooth shape; wherein the inclined plate connected to the outer plate of the ship body is a first inclined plate; the first inclined plate extends towards the inclined upper part; and the included angle between the first inclined plate and the ship body outer plate is 20-50 degrees. According to the invention, the wave slapping load can be reduced, so that a good slapping resisting effect is realized; and meanwhile, the navigational speed loss in navigation can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a sawtooth anti-slapping structure. Background Art

[0002] After the deck of a semi-submersible vessel is widened, it is generally necessary to consider loading cargo on the side. The design load of the widened deck is generally consistent with that of the main hull, and the design load is relatively large, generally 20t / m 2 Therefore, the box of the widened part needs a certain height to meet the strength requirements of the design load. At the same time, the mooring bollards on the side need to be arranged in the box under the deck. After the mooring bollards are arranged, a certain amount of remaining space is required to ensure the convenience of construction. The above reasons lead to the height of the side plate not being too small, generally needing to be above 1.5m.

[0003] The draft of a semi-submersible vessel is usually small, and the distance between the structural waterline and the main deck is not large. The box-shaped structure attached to the deck widening needs to be set above the structural draft first to avoid causing changes in the main dimension width and the corresponding changes in the ship's standard size requirements after the width changes. At the same time, the closed structure should be arranged as far away from the structural waterline as possible to minimize the impact of waves on the structural strength and speed.

[0004] Based on the above considerations, the conventional design of the existing deck widening box section is generally as follows: Figure 1 shown. Figure 1 In the embodiment, the deck widening box-shaped part 50 is arranged outside the hull outer plate 51 and the main deck 53, and a bottom plate 52 is arranged at the bottom of the deck widening box-shaped part 50. The bottom plate 52 is a whole plate structure, and the bottom plate extends obliquely upward. The angle between the bottom plate 52 and the hull outer plate 51 is the flare angle α. The flare angle is generally large, and the wave impact load is closely related to the flare angle. The larger the flare angle, the greater the impact load, the greater the risk of strength problems and vibration problems caused by wave impact, and the more serious the loss of speed.

[0005] Generally, the flare angle of more than 40° is considered to be seriously affected by the wave impact. In the above conventional design, the flare angle α of the bottom plate is generally above 70°, so the wave impact problem is the main problem of this design.

[0006] The prior art has the following disadvantages:

[0007] (1) The strength risk is relatively high. Due to the large outward angle of the bottom plate, the wave impact load is large, which can easily cause the bottom plate to deform.

[0008] (2) The risk of vibration is relatively high. Since the waves have a certain frequency, there is a possibility of resonance with the hull structure.

[0009] (3) The speed loss is more serious. Wave impact will increase the resistance during navigation, thus causing speed loss. Summary of the invention

[0010] In order to overcome the above-mentioned defects in the prior art, the present invention provides a sawtooth anti-slapping structure.

[0011] The present invention solves the above technical problems through the following technical solutions:

[0012] A sawtooth anti-slapping structure, comprising a deck widening box-shaped portion arranged on the outside of the hull outer plate; a bottom plate is provided at the bottom of the deck widening box-shaped portion, and the bottom plate is fixedly connected to the hull outer plate; it is characterized in that the bottom plate comprises a plurality of oblique plates; the plurality of oblique plates are connected in sequence to form a sawtooth shape; wherein the oblique plate connected to the hull outer plate is a first oblique plate; the first oblique plate extends obliquely upward; the angle between the first oblique plate and the hull outer plate is 20° to 50°.

[0013] Furthermore, the top of the deck widening box-shaped portion is a top plate, and the top plate is flush with the deck of the ship.

[0014] Furthermore, the deck widening box-shaped portion also includes side walls; the side walls are arranged between the top plate and the bottom plate.

[0015] Furthermore, the top plate, the side wall, the bottom plate and the hull outer plate form a deck widening box-shaped portion.

[0016] Furthermore, the oblique plate connected to the side wall is a second oblique plate, and an upper end portion of the second oblique plate is fixedly connected to the side wall.

[0017] Furthermore, the angles between the other oblique plates except the first oblique plate and the vertical plane are 20° to 50° respectively; the vertical plane is parallel to the hull outer plate.

[0018] Furthermore, the oblique plates are connected by welding.

[0019] Furthermore, the oblique plates are integrally formed.

[0020] Furthermore, no frame material is provided on the bottom plate.

[0021] Furthermore, the number of the diagonal plates is not less than 3.

[0022] The beneficial effect of the present invention is that: in the present invention, the bottom plate of the deck widening box-shaped part is designed to be serrated, formed by welding or bending, and its shape is adjusted to freely control the outward drift angle of each oblique plate, so that the outward drift angle of each oblique plate can be controlled within a reasonable range, thereby reducing the wave impact load and achieving a good anti-impact effect; at the same time, it can also reduce the speed loss during navigation. The present invention has a good application prospect in semi-submersible ships and other ships that need to be equipped with appendages. It can effectively reduce the anti-wave impact ability of the appendages on the structural waterline, improve the reliability of strength and vibration performance, and reduce the speed loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the prior art.

[0024] Figure 2 It is a structural schematic diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0025] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0026] The present invention proposes a sawtooth anti-slapping structure, which can effectively reduce the outward drift angle, thereby reducing the adverse effects of the slapping on the structural strength and the speed.

[0027] like Figure 2 As shown, a sawtooth anti-slapping structure includes a deck widening box-shaped portion 20 arranged on the outer side of the hull outer plate 10.

[0028] A bottom plate 30 is provided at the bottom of the deck widening box-shaped portion 20 , and the bottom plate 30 is fixed to the hull outer plate 10 .

[0029] The top of the deck widening box-shaped portion 20 is a top plate 21, and the top plate 21 is flush with the deck 11 of the ship. The deck 11 of the ship is a main deck.

[0030] The deck widening box-shaped portion 20 further includes a side wall 22 ; the side wall 22 is disposed between the top plate 21 and the bottom plate 30 .

[0031] The top plate 21 , the side wall 22 , the bottom plate 30 and the hull outer plate 10 form a deck widening box-shaped portion 20 .

[0032] The bottom plate 30 includes a plurality of oblique plates 31, which are connected in sequence to form a sawtooth shape. The number of the oblique plates is not less than three.

[0033] The oblique plate connected to the outer hull plate is a first oblique plate 41. The first oblique plate 41 extends obliquely upward; the lower end of the first oblique plate is fixedly connected to the outer hull plate.

[0034] An internal component 12 is fixedly connected to the inner side of the hull outer plating 10. In this embodiment, the internal component 12 is a tank deck. The connection between the lower end of the first oblique plate 41 and the hull outer plating 10 coincides with the connection between the internal component 12 and the hull outer plating 10.

[0035] The angle θ between the first oblique plate 41 and the hull outer plate 10 is 20° to 50°. The angle between the first oblique plate 41 and the hull outer plate 10 is the outward angle of the first oblique plate. The outward angle of the first oblique plate can be selected between 20° and 50° according to actual conditions.

[0036] The angles between the other oblique plates except the first oblique plate and the vertical plane are 20° to 50° respectively; the vertical plane is parallel to the hull plate. The angles between the other oblique plates except the first oblique plate and the vertical plane are the outward angles of the other oblique plates. The outward angles of the other oblique plates can be selected between 20° and 50° according to actual conditions.

[0037] In one embodiment, the outward angle of the first oblique plate and the outward angle of each other oblique plate may be the same angle, that is, the outward angle of the first oblique plate is the same as the outward angle of each other oblique plate.

[0038] In another embodiment, the outward drift angle of the first oblique plate and the outward drift angles of the other oblique plates may also be different angles; that is, the outward drift angle of the first oblique plate and the outward drift angles of the other oblique plates are different from each other, or the outward drift angle of the first oblique plate and the outward drift angles of the other oblique plates may be the same or different.

[0039] The oblique plate connected to the side wall 22 is a second oblique plate 42 , and an upper end portion of the second oblique plate 42 is fixed to the side wall 22 .

[0040] The bottom plate can be formed by welding a plurality of oblique plates, that is, the oblique plates are connected by welding.

[0041] The bottom plate can also be formed by bending a single plate, that is, the oblique plates are integrally formed.

[0042] Since the bottom plate is strong enough, no frame material is provided on the bottom plate 30 .

[0043] In this solution, the bottom plate of the deck widening box-shaped portion is designed to be serrated, which is formed by welding or bending. By adjusting its shape, the outward angle of each oblique plate can be freely controlled, so that the outward angle of each oblique plate can be controlled within a reasonable range, thereby reducing the wave impact load and achieving a good anti-impact effect; at the same time, it can also reduce the speed loss during navigation.

[0044] In this scheme, although the welding or bending work of the bottom plate is increased, the frame material on the bottom plate can be eliminated, and the construction feasibility and convenience are good.

[0045] The present invention has good application prospects in semi-submersible vessels and other ships that need to be equipped with appendages. It can effectively reduce the wave impact resistance of the appendages on the structural waterline, improve the reliability of strength and vibration performance, and reduce speed loss.

[0046] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A sawtooth anti-slapping structure, comprising a deck widening box-shaped portion arranged on the outside of the hull outer plate; a bottom plate is provided at the bottom of the deck widening box-shaped portion, and the bottom plate is fixed to the hull outer plate; characterized in that: The bottom plate includes a plurality of oblique plates, which are connected in sequence to form a sawtooth shape. The oblique plate connected to the outer plate of the hull is the first oblique plate, which extends obliquely upward. The angle between the first oblique plate and the outer plate of the hull is 20° to 50°.

2. The sawtooth anti-slap structure according to claim 1, characterized in that: The top of the deck widening box-shaped portion is a top plate, which is flush with the deck of the ship.

3. The sawtooth anti-slap structure according to claim 2, characterized in that: The deck widening box-shaped portion also includes side walls; the side walls are arranged between the top plate and the bottom plate.

4. The sawtooth anti-slap structure according to claim 3, characterized in that: The top plate, side wall, bottom plate and hull outer plate form a deck widening box-shaped portion.

5. The sawtooth anti-slap structure according to claim 3, characterized in that: The oblique plate connected to the side wall is a second oblique plate, and the upper end of the second oblique plate is fixedly connected to the side wall.

6. The sawtooth anti-slap structure according to claim 1, characterized in that: The included angles between the other oblique plates except the first oblique plate and the vertical plane are 20° to 50° respectively; the vertical plane is parallel to the hull outer plate.

7. The sawtooth anti-slap structure according to claim 1, characterized in that: The inclined plates are connected by welding.

8. The sawtooth anti-slap structure according to claim 1, characterized in that: The oblique plates are integrally formed.

9. The sawtooth anti-slap structure according to claim 1, characterized in that: No aggregate is provided on the bottom plate.

10. The sawtooth anti-slap structure according to claim 1, characterized in that: The number of inclined plates shall not be less than 3.

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