Optimization design method for hull structure with sharp included angle and ship

Abstract

An optimization design method for a hull structure with a sharp included angle and a ship. A confined space of a sharp included angle structure is optimized. A cut-off end is provided on a deck structure at a portion extending toward a ship-line flared shell plate and close to the confined space of the sharp included angle structure. A short beam structure is a below the cut-off end of the deck structure for support. Transverse reinforcing brackets are arranged on a side of the short beam structure close to an edge of the ship-line flared shell plate. A panel is arranged above the transverse reinforcing brackets and covers the transverse reinforcing brackets. The panel extends from below the cut-off end toward the edge of the ship-line flared shell plate along the short beam structure. By cutting off the deck structure in advance, the deck structure no longer extends to the edge of the ship-line flared shell plate, and the deck structure is supported by the short beam structure, thereby solving the problems of difficult construction and stress concentration caused by the deck structure extending to the edge of the ship-line flared shell plate.

Description

A method for optimizing the design of a sharp-angled hull structure and a ship Technical Field

[0001] This invention relates to the field of ship design, specifically to a method for designing a hull structure with a sharp angle and a ship. Background Technology

[0002] In the field of shipbuilding, especially in the design of container ships, due to the large hull lines, in areas where the flare angle exceeds 65°, if the inner deck intersects the outer plating directly, a sharp angle structure will be formed between the deck and the outer plating. If the angle of the sharp angle is less than 25°, a narrow space will be formed at the angle, resulting in stress concentration at that point, which is detrimental to later construction and maintenance.

[0003] For this angled position, welding is more difficult, and it is not convenient to perform internal welding. Welding only from the outside cannot guarantee the welding quality. In addition, even if the welding is completed, the stress is relatively concentrated at the angle in the narrow space, which can easily lead to deformation and damage. Summary of the Invention

[0004] To fundamentally solve the above-mentioned technical problems, this invention provides a method and vessel for optimizing the design of a hull with a sharp angle, which changes the hull structure design to avoid the construction difficulty and stress concentration caused by the excessively small angle of the hull.

[0005] The technical objective of this invention is achieved through the following technical solution:

[0006] A method for optimizing the design of a ship hull structure with a sharp angle, the method comprising the following steps:

[0007] Step 1: Determine whether the angle between the edge of the ship's flared outer plating and the deck structure is less than 25°. If it is less than 25°, then the area with an angle less than 25° is determined to be a narrow space with a sharp angle structure.

[0008] Step 2: Extend the deck structure towards the flared outer plating of the ship's lines and set the cut-off point near the narrow space of the sharp angle structure;

[0009] Step 3: Install a short beam structure for support below the cut-off end of the deck structure. The short beam structure is inclined and supported between the cut-off end of the deck structure and the flared outer plating of the ship's line below the cut-off end.

[0010] Step 4: Install a transverse reinforcing elbow plate on the side of the short beam structure near the edge of the flared outer plate of the ship's shape. The transverse reinforcing elbow plate connects the short beam structure and the flared outer plate of the ship's shape, and extends along the short beam structure to the edge of the flared outer plate of the ship's shape.

[0011] Step 5: Install a panel above the transverse reinforcing elbow plate, the panel covering the transverse reinforcing elbow plate, the panel extending from below the cut-off end point along the short beam structure toward the edge of the flared outer plate of the ship's shape.

[0012] Furthermore, the angle between the short beam structure and the deck structure, as well as the angle between the short beam structure and the flared outer plating of the ship's lines, are both greater than 45°.

[0013] Furthermore, a safety protection structure is installed above the cut-off end of the deck structure.

[0014] Furthermore, in step 3, the method also includes using finite element software to model and analyze whether the stress in the optimized region of the pointed hull structure under load meets the requirements. If it does not meet the requirements, the angle of the short beam structure is adjusted so that the stress in the optimized region of the pointed hull structure meets the requirements.

[0015] Furthermore, in step 1, the flare angle of the ship's hull is greater than 60°.

[0016] Furthermore, there is a height difference of 15-25mm between one end of the transverse reinforcing elbow connecting the short beam structure and the lower end of the deck structure, which facilitates welding at the transverse reinforcing elbow and ensures the strength of the transverse reinforcing elbow.

[0017] Furthermore, the height of the safety protection structure above the deck structure is 600mm-150mm.

[0018] Furthermore, water flow holes are provided on the transverse reinforcing elbow plate and the short beam structure respectively. The water flow holes of the short beam structure are located near the connection between the short beam structure and the flared outer plate of the ship's hull. The water flow holes on the transverse reinforcing elbow plate are located near the angle between the transverse reinforcing elbow plate and the short beam structure and the flared outer plate of the ship's hull.

[0019] Furthermore, the narrow space of the pointed-angle structure is located in one or more of the engine room, cargo hold, bow, or stern.

[0020] Another aspect provides a ship in which a cut-off end is provided on the side of the deck structure near the edge of the hull's flared outer plating, and a short beam structure is supported below the cut-off end. The short beam structure is inclinedly supported between the cut-off end of the deck structure and the flared outer plating below the cut-off end. A panel is provided above the transverse reinforcing elbow plate, covering the transverse reinforcing elbow plate, and the panel extends from below the cut-off end along the short beam structure toward the edge of the flared outer plating.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention optimizes the narrow space of the sharp-angled structure, cuts off the deck structure in advance, and prevents the deck structure from extending to the edge of the ship's flared outer plating. It also uses a short beam structure to support the deck structure, thus solving the problem of the narrow space of the sharp-angled structure at the edge of the ship's flared outer plating. This avoids the problems of high construction and maintenance difficulty and stress concentration. Attached Figure Description

[0023] Figure 1 is a schematic cross-sectional view of the optimized hull structure with sharp angles in this invention.

[0024] Figure 2 is a top view of the optimized hull structure with sharp angles in this invention.

[0025] Figure 3 is a schematic diagram of the short beam structure in this invention.

[0026] Figure 4 is a schematic diagram of the guardrail in this invention.

[0027] Figure 5 is a schematic diagram of the water flow hole arrangement at the transverse reinforcing elbow plate in this invention.

[0028] Figure 6 is a schematic diagram of the connection between the transverse reinforcing elbow plate and the outer plate rib in this invention.

[0029] In the diagram: 1. Deck structure; 2. Outer plating of the ship's hull; 3. Short beam structure; 4. Lateral reinforcing elbow plate; 5. Guardrail; 6. Drain hole; 7. Deck load; 8. Optimized area in a narrow space with a sharp angle structure; 9. Panel; 10. Cut-off end; 11. Outer plating ribs. Detailed Implementation

[0030] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0031] A method for optimizing the design of a ship hull structure with a sharp angle, the method comprising the following steps:

[0032] Step 1: Determine whether the angle between the edge of the ship's hull-over plate 2 and the deck structure 1 is less than 25°. If it is less than 25°, the area with an angle less than 25° is determined to be a narrow space with a sharp angle structure. The ship's hull-over plate 2 can exist at the bow, stern, engine room, and cargo hold. Therefore, narrow spaces with sharp angle structures may exist at the bow, stern, engine room, and cargo hold.

[0033] In one embodiment, the flare angle of the ship's hull outer plate that forms a narrow space with a sharp angle structure is greater than 60°, and the area with a flare angle greater than 60° is more likely to form a narrow space with a sharp angle structure.

[0034] Step 2: Optimize the narrow space of the pointed angle structure in 8 locations. The deck structure 1 extends towards the ship's hull-outer plate 2 and is cut off in advance at the position close to the narrow space of the pointed angle structure, forming the cut-off endpoint, as shown in Figures 1 and 2.

[0035] Step 3: A short beam structure 3 is installed below the cut-off end 10 of the deck structure 1 for support. The short beam structure 3 is inclined and supported between the cut-off end 10 of the deck structure 1 and the ship line flare plate 2 below the cut-off end 10.

[0036] As a preferred embodiment, the angle between the short beam structure 3 and the deck structure 1, as well as the angle between the short beam structure and the flared outer plating of the ship's lines, are both greater than 45° and not more than 90°.

[0037] Preferably, the deck structure 1 may need to bear a heavy deck load 7, such as the generator in the engine room. Therefore, finite element analysis software is needed to model and analyze whether the stress in the optimized region of the pointed-angle hull structure 1 under load meets the requirements. If not, the angle of the short beam structure 3 is adjusted to ensure the stress in the optimized region of the pointed-angle hull structure meets the requirements. When the stress in the optimized region of the pointed-angle hull structure 1 under load does not meet the requirements, i.e., the stress exceeds the set range, the angle between the short beam structure 3 and the flared outer plating 2 of the ship's hull shape is gradually increased.

[0038] Step 4: A transverse reinforcing elbow plate 4 is installed on the side of the short beam structure 3 near the edge of the ship's flared outer plate. The transverse reinforcing elbow plate 4 is connected to the short beam structure 3 and the ship's flared outer plate 2. The transverse reinforcing elbow plate 4 extends along the short beam structure 3 to the edge of the ship's flared outer plate 2.

[0039] Preferably, there is a height difference between one end of the transverse reinforcing elbow plate 4 connecting the short beam structure 3 and the lower end face of the deck structure 1, with the height difference being 15-25mm. The height difference facilitates the welding operation between the transverse reinforcing elbow plate and the short beam structure, ensuring welding quality and structural strength of the transverse reinforcing elbow plate.

[0040] Step 5: Set up a panel 9 above the transverse reinforcing elbow plate 4. The panel 9 covers the transverse reinforcing elbow plate 4. The transverse reinforcing elbow plates 4 are set parallel to each other. The panel 9 extends from below the cut-off end point along the short beam structure 3 toward the edge of the ship's hull-out outer plate 2.

[0041] As a preferred option, considering that water may accumulate at the location of the transverse elbow plate 4 due to the need for tank cleaning, water holes 6 are respectively provided on the transverse reinforcing elbow plate 4 and the short beam structure 3.

[0042] More specifically, the short beam structure is a steel plate structure, as shown in Figures 3 and 5. The water flow holes 6 of the short beam structure 3 are located near the location where the short beam structure 3 connects to the outer flare plate 2 of the ship's hull. The water flow holes 6 on the transverse reinforcing elbow plate 4 are located near the angle between the short beam structure 3 and the outer flare plate 2 of the ship's hull.

[0043] As a preferred option, since the deck structure 1 is cut off in advance, and considering the need for deck passage, a safety protection structure is also provided above the cut-off end 10 of the deck structure 1. The safety protection structure is such as a guardrail 5. The protection height of the safety protection structure above the deck structure 1 is 600mm-150mm, as shown in Figure 4.

[0044] In one embodiment, as shown in Figure 6, several outer plate ribs 11 are provided along the edge of the hull-shaped flared outer plate towards the interior of the hull. The outer plate ribs 11 are like T-shaped profiles. The transverse reinforcing elbow plate 4 is positioned corresponding to the outer plate ribs 11. When installing the transverse reinforcing elbow plate 4 and the short beam structure 3, the corresponding section of the outer plate rib 11 is removed. One end of the transverse reinforcing elbow plate 4 is connected to the short beam structure 3, and the other end of the transverse reinforcing elbow plate 4 extends to the outer plate ribs 11 along the edge of the flared outer plate of the hull. One end of the panel 9 is connected to the short beam structure 3, and the other end of the panel 9 is connected to the outer plate ribs 11 along the edge of the flared outer plate of the hull.

[0045] This embodiment also provides a ship that can be constructed by optimizing a ship with a narrow space and a sharp angle structure according to the above method. A cut-off end point 10 is provided on the side of the deck structure 1 near the edge of the ship's hull flared outer plate 2. A short beam structure 3 is supported below the cut-off end point 10. The short beam structure 3 is inclinedly supported between the cut-off end point 10 of the deck structure 1 and the ship's hull flared outer plate 2 below the cut-off end point 10. A panel 9 is provided above the transverse reinforcing elbow plate 4. The panel 9 covers the transverse reinforcing elbow plate 4 and extends from below the cut-off end point 10 along the short beam structure 3 toward the edge of the ship's hull flared outer plate 2.

[0046] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. Those skilled in the art can make non-inventive modifications to this embodiment as needed after reading this specification, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for optimizing the design of a ship hull structure with a sharp angle, characterized in that, The method includes the following steps: Step 1: Determine whether the angle between the edge of the ship's flared outer plating and the deck structure is less than 25°. If it is less than 25°, then the area with an angle less than 25° is determined to be a narrow space with a sharp angle structure. Step 2: Extend the deck structure towards the flared outer plating of the ship's lines and set the cut-off point near the narrow space of the sharp angle structure; Step 3: Install a short beam structure for support below the cut-off end of the deck structure. The short beam structure is supported between the cut-off end of the deck structure and the flared outer plating of the ship's line below the cut-off end. Step 4: Install a transverse reinforcing elbow plate on the side of the short beam structure near the edge of the flared outer plate of the ship's shape. The transverse reinforcing elbow plate connects the short beam structure and the flared outer plate of the ship's shape, and extends along the short beam structure to the edge of the flared outer plate of the ship's shape. Step 5: Install a panel above the transverse reinforcing elbow plate, the panel covering the transverse reinforcing elbow plate, the panel extending from below the cut-off end point along the short beam structure toward the edge of the flared outer plate of the ship's shape.

2. The method for optimizing the design of a sharp-angled hull structure according to claim 1, characterized in that, The angle between the short beam structure and the deck structure, as well as the angle between the short beam structure and the flared outer plating of the ship's lines, are both greater than 45°.

3. The method for optimizing the design of a sharp-angled hull structure according to claim 1, characterized in that, A safety protection structure is also provided above the cut-off end of the deck structure.

4. The method for optimizing the design of a sharp-angled hull structure according to claim 2, characterized in that, Step 3 also includes using finite element software to model and analyze whether the stress in the optimized region of the pointed-angle hull structure under load meets the requirements. If it does not meet the requirements, the angle of the short beam structure is adjusted so that the stress in the optimized region of the pointed-angle hull structure meets the requirements.

5. The method for optimizing the design of a sharp-angled hull structure according to claim 1, characterized in that, In step 1, the outward flare angle of the ship's hull is greater than 60°.

6. The method for optimizing the design of a sharp-angled hull structure according to claim 1, characterized in that, There is a height difference between one end of the transverse reinforcing elbow plate connecting the short beam structure and the lower end of the deck structure, with the height difference being 15-25mm.

7. The method for optimizing the design of a sharp-angled hull structure according to claim 3, characterized in that, The height of the safety protection structure above the deck structure is 600mm-150mm.

8. The method for optimizing the design of a sharp-angled hull structure according to claim 1, characterized in that, Water flow holes are provided on the transverse reinforcing elbow plate and the short beam structure respectively. The water flow holes of the short beam structure are located near the connection between the short beam structure and the flared outer plate of the ship's hull. The water flow holes of the transverse reinforcing elbow plate are located near the angle between the transverse reinforcing elbow plate and the short beam structure and the flared outer plate of the ship's hull.

9. The method for optimizing the design of a sharp-angled hull structure according to claim 1, characterized in that, The narrow space of the pointed angle structure is located in one or more of the engine room, cargo hold, bow, or stern.

10. A ship, characterized in that, A cut-off end is provided on the side of the deck structure near the edge of the hull's flared outer plating. A short beam structure is supported below the cut-off end, and the short beam structure is inclinedly supported between the cut-off end of the deck structure and the flared outer plating below the cut-off end. A panel is provided above the transverse reinforcing elbow plate, covering the transverse reinforcing elbow plate, and the panel extends from below the cut-off end along the short beam structure toward the edge of the flared outer plating.

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