Liquefied gas ship structure design method and ship

Abstract

The invention relates to the technical field of ships, in particular to a liquefied gas ship structure design method and a ship, and the liquefied gas ship structure design method comprises the following steps: a first inclined plate on one side, facing a liquid cargo tank, of a top side tank of a ship body is designed to be in a broken line shape, so that the first inclined plate has a first plane parallel to the horizontal plane; a second inclined plate, facing the first inclined plate, of the liquid cargo tank is designed to be in a broken line shape, so that the second inclined plate is provided with a second plane parallel to the horizontal plane, and the second plane and the first plane are oppositely arranged at intervals; a floating stopping base is fixedly installed on the second plane or the first plane, and the distance between the floating stopping base and the first plane or the second plane is within a set range. The force transmission direction between the floating stopping base and the top side cabin can be changed, the force acting on the top side cabin is fundamentally reduced, and therefore the plate thickness is reduced, and investment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a liquefied gas ship structure design method and a ship. Background Art

[0002] For bulk transport liquefied gas ships, liquid cargo tanks are provided in the hull. An anti-floating base is provided between the liquid cargo tank and the hull, and the function of the anti-floating base is to limit the floating of the liquid cargo tank. In order to make the upper end surface of the anti-floating base come into surface contact with the inclined plate of the topside tank, the upper end surface of the anti-floating base is parallel to the inclined plate of the topside tank, that is, the anti-floating base is also arranged at an angle. When the cargo hold of the hull is flooded, the liquid cargo tank floats up. During the floating process, when the anti-floating base comes into surface contact with the inclined plate of the topside tank, the anti-floating base transfers the buoyancy of the liquid cargo tank to the topside tank structure, preventing the liquid cargo tank from floating up, thereby realizing the anti-floating function of the liquid cargo tank.

[0003] However, due to the inclined arrangement of the anti-floating base, when the liquid cargo tank floats, the force of the anti-floating base acts on the inclined plate of the topside tank. The angle between the inclined plate of the topside tank and the horizontal plane is α. There are n anti-floating bases in the liquid cargo tank, and the total buoyancy of the liquid cargo tank is F. Then the force F' acting on the inclined plate of the topside tank is F / (n*cosα). Since α is between 23°-45°, the force acting on the inclined plate of the topside tank is relatively large. In the design process, the thickness of the inclined plate of the topside tank needs to be increased, resulting in an increase in the structural weight of the hull, and the hull structural plate that meets the strength requirements of the inclined plate of the topside tank is difficult to purchase and requires a large investment.

[0004] Therefore, a liquefied gas ship structure design method and a ship are needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a liquefied gas ship structure design method and ship, which can change the force transmission direction between the anti-floating base and the top side tank, fundamentally reduce the force acting on the top side tank, thereby reducing the plate thickness and reducing investment.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The structural design method of a liquefied gas ship comprises the following steps:

[0008] The first inclined plate of the top side tank of the hull facing the liquid cargo tank is designed to be in a broken line shape, so that the first inclined plate has a first plane parallel to the horizontal plane;

[0009] The second inclined plate of the liquid cargo tank facing the first inclined plate is designed to be in a broken line shape, so that the second inclined plate has a second plane parallel to the horizontal plane, and the second plane is arranged opposite to the first plane with a spacing;

[0010] A floating stop base is fixedly installed on the second plane or the first plane, and the distance between the floating stop base and the first plane or the second plane is within a set range.

[0011] In some embodiments, the anti-floating base includes a base body and laminated wood, the base body is fixedly connected to the second plane, and the laminated wood is arranged at an end of the base body away from the second plane, or the base body is fixedly connected to the first plane, and the laminated wood is arranged at an end of the base body away from the first plane.

[0012] In some embodiments, the liquid cargo tank comprises a bottom plate, two bottom inclined plates, two side plates, two second inclined plates and a top plate; the bottom plate, the bottom inclined plate, the side plates, the second inclined plates and the top plate are arranged to form a liquid cargo tank body; sealing plates are arranged at both ends of the liquid cargo tank body to form a closed liquid cargo tank.

[0013] In some embodiments, the bottom sloping plate is parallel to the sloping plate of the bottom side tank of the hull.

[0014] In some embodiments, the bottom plate, the bottom inclined plate, the side plate, the second inclined plate and the top plate are connected in sequence, and arc transitions are used at the connections.

[0015] In some embodiments, reinforcing ribs are fixedly arranged between the top side tank of the hull and the bottom side tank of the hull.

[0016] In some embodiments, the overlapping length of the projection of the first plane toward the second plane is not less than 1000 mm.

[0017] In some embodiments, a mid-longitudinal bulkhead is provided in the liquid cargo tank, and the mid-longitudinal bulkhead is located at a mid-longitudinal section of the liquid cargo tank.

[0018] In some embodiments, a surge bulkhead is provided in the liquid cargo tank.

[0019] A ship comprises a hull and a liquid cargo tank, wherein the liquid cargo tank is located in the hull, and the hull and the liquid cargo tank are designed using the liquefied gas ship structure design method as described above.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a method for designing the structure of a liquefied gas ship, in which the first inclined plate of the topside tank of the hull facing the liquid cargo tank is designed to be in a broken line shape, so that the first inclined plate has a first plane parallel to the horizontal plane, and the second inclined plate of the liquid cargo tank facing the first inclined plate is designed to be in a broken line shape, so that the second inclined plate has a second plane parallel to the horizontal plane, and the second plane is arranged relative to the first plane at an interval, and the anti-floating base is fixedly installed on the second plane or the first plane. Through the above-mentioned design method, the contact surface between the anti-floating base and the first inclined plate of the topside tank is changed from an inclined plane to a horizontal plane, thereby changing the force direction of the topside tank. When the liquid cargo tank floats, the force acting on the topside tank is a force perpendicular to the horizontal plane, which fundamentally reduces the force acting on the topside tank. Since the force on the first inclined plate of the topside tank is reduced, the thickness of the first inclined plate can be reduced, saving material cost investment. Moreover, by arranging the anti-floating base on the second plane, the installation of the anti-floating base is facilitated.

[0022] A ship provided by the present invention comprises a hull and a liquid cargo tank, which can change the force transmission direction between the anti-floating base and the topside tank, fundamentally reducing the force acting on the topside tank, thereby reducing the plate thickness and reducing the investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 This is a layout diagram of the anti-floating base of the non-upward convex deck ship in the present invention;

[0025] Figure 2 It is another arrangement diagram of the anti-floating base of the non-upward convex deck ship in the present invention;

[0026] Figure 3 It is a layout diagram of the anti-floating base of the upper convex deck ship in the present invention;

[0027] Figure 4 It is another arrangement diagram of the anti-floating base of the upper convex deck ship in the present invention.

[0028] In the figure:

[0029] 1. Hull; 11. Top side tank; 111. First sloping plate; 112. First plane; 12. Bottom side tank; 13. Reinforcement rib; 2. Liquid cargo tank; 21. Bottom plate; 22. Bottom sloping plate; 23. Side plate; 24. Second sloping plate; 241. Second plane; 25. Top plate; 3. Anti-floating base; 31. Base body; 32. Laminated wood. DETAILED DESCRIPTION

[0030] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0031] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0032] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0033] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0034] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0035] In the process of designing the structure of liquefied gas ships, in order to change the force transmission direction between the anti-floating base and the topside tank, fundamentally reduce the force acting on the topside tank, thereby reducing the plate thickness and reducing investment, such as Figure 1-Figure 4 As shown, the present invention provides a liquefied gas ship structure design method. The liquefied gas ship structure design method comprises the following steps:

[0036] The first inclined plate 111 of the top side tank 11 of the hull 1 facing the liquid cargo tank 2 is designed to be in a broken line shape, so that the first inclined plate 111 has a first plane 112 parallel to the horizontal plane;

[0037] The second inclined plate 24 of the liquid cargo tank 2 facing the first inclined plate 111 is designed to be in a broken line shape, so that the second inclined plate 24 has a second plane 241 parallel to the horizontal plane, and the second plane 241 is arranged opposite to the first plane 112 with a spacing;

[0038] The anti-floating base 3 is fixedly installed on the second plane 241 or the first plane 112 , and the distance between the anti-floating base 3 and the first plane 112 or the second plane 241 is within a set range.

[0039] By means of the above-mentioned design, the contact surface between the anti-floating base 3 and the first inclined plate 111 of the top tank 11 is changed from an inclined surface to a horizontal surface, thereby changing the force direction of the top tank 11. When the liquid cargo tank 2 floats, the force acting on the top tank 11 is a force perpendicular to the horizontal surface, which fundamentally reduces the force acting on the top tank 11. Since the force on the first inclined plate 111 of the top tank 11 is reduced, the thickness of the first inclined plate 111 can be reduced, saving material cost investment. In addition, by arranging the anti-floating base 3 on the second plane 241, the installation of the anti-floating base 3 is facilitated.

[0040] In some embodiments, the anti-floating base 3 includes a base body 31 and laminated wood 32. The base body 31 is fixedly connected to the second plane 241, and the laminated wood 32 is arranged at one end of the base body 31 away from the second plane 241, or the base body 31 is fixedly connected to the first plane 112, and the laminated wood 32 is arranged at one end of the base body 31 away from the first plane 112. By designing the anti-floating base 3 as a structure of the base body 31 and the laminated wood 32, it is convenient to weld the base body 31 to the second plane 241. At the same time, the laminated wood 32 is used as a buffer between the base body 31 and the first plane 112 of the top side tank 11, which can avoid direct rigid contact between the base body 31 and the top side tank 11, thereby protecting the top side tank 11 and the base body 31.

[0041] In some embodiments, the liquid cargo tank 2 includes a bottom plate 21, two bottom inclined plates 22, two side plates 23, two second inclined plates 24 and a top plate 25, the bottom plate 21, the bottom inclined plates 22, the side plates 23, the second inclined plates 24 and the top plate 25 are arranged to form a liquid cargo tank body, and sealing plates are arranged at both ends of the liquid cargo tank body to form a closed liquid cargo tank 2. Through the above design, the liquid cargo tank 2 can be easily manufactured.

[0042] In some embodiments, the bottom inclined plate 22 is parallel to the inclined plate of the hopper tank 12 of the hull 1. Through the above design, the space corresponding to the inclined plate of the hopper tank 12 can be used to increase the volume of the liquid cargo tank 2 as much as possible. In this embodiment, the minimum construction passage is left between the liquid cargo tank 2 and the hull 1, which can ensure that the volume of the liquid cargo tank 2 is large enough.

[0043] In some embodiments, the bottom plate 21, the bottom inclined plate 22, the side plate 23, the second inclined plate 24 and the top plate 25 are connected in sequence, and arc transition is adopted at the connection. By adopting the form of arc transition, stress concentration can be avoided at the connection, and the overall structure of the liquid cargo tank 2 is ensured to be stable.

[0044] In some embodiments, a reinforcing rib 13 is fixedly arranged between the topside tank 11 of the hull 1 and the bottom side tank 12 of the hull 1. Specifically, the upper end of the reinforcing rib 13 is fixedly connected to the first inclined plate 111 of the topside tank 11. When the position where the first inclined plate 111 and the reinforcing rib 13 face each other is a first horizontal plane, the upper end of the reinforcing rib 13 is connected to the first inclined plate 111 at 90 degrees, and when the position where the first inclined plate 111 and the reinforcing rib 13 face each other is an inclined plane, the upper end of the reinforcing rib 13 is connected to the first inclined plate 111 at an obtuse angle. The lower end of the reinforcing rib 13 is connected to the inclined plate of the bottom side tank 12 at an obtuse angle. By providing the reinforcing rib 13, the strength of the structure of the hull 1 can be improved.

[0045] In some embodiments, the overlap length of the projection of the first plane 112 toward the second plane 241 is not less than 1000 mm. Through the above arrangement, the length of the anti-floating base 3 subsequently arranged on the second plane 241 can be guaranteed, and it is avoided that the length of the anti-floating base 3 is too short due to the second plane 241 being too narrow, thereby preventing excessive pressure from being caused when contacting the first inclined plate 111 of the top side tank 11.

[0046] In some embodiments, a middle longitudinal bulkhead is provided in the liquid cargo tank 2, and the middle longitudinal bulkhead is located at the middle longitudinal section of the liquid cargo tank 2. Specifically, the middle longitudinal bulkhead may be a watertight or non-watertight bulkhead structure. By providing the middle longitudinal bulkhead, the liquid cargo tank 2 can be supported to ensure the structural strength of the liquid cargo tank 2.

[0047] In some embodiments, a sway-stopping bulkhead is provided in the liquid cargo tank 2. Specifically, the sway-stopping bulkhead adopts a non-watertight bulkhead structure, and the sway-stopping bulkhead is located in the middle of the liquid cargo tank 2 along the length direction, which can attenuate the flow of liquid in the liquid cargo tank 2, thereby ensuring the safety of liquid cargo transportation.

[0048] The present embodiment also provides a ship, comprising a hull 1 and a liquid cargo tank 2, wherein the liquid cargo tank 2 is located in the hull 1, and the hull 1 and the liquid cargo tank 2 are designed by adopting the above-mentioned liquefied gas ship structure design method, which can change the force transmission direction between the anti-floating base 3 and the top side tank 11, fundamentally reduce the force acting on the top side tank 11, thereby reducing the plate thickness and reducing the investment.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A liquefied gas ship structure design method, characterized in that: The steps include: The first inclined plate (111) on the side of the topside tank (11) of the hull (1) facing the liquid cargo tank (2) is designed to be in a broken line shape, so that the first inclined plate (111) has a first plane (112) parallel to the horizontal plane; The second inclined plate (24) of the liquid cargo tank (2) facing the first inclined plate (111) is designed to be in a broken line shape, so that the second inclined plate (24) has a second plane (241) parallel to the horizontal plane, and the second plane (241) is arranged relative to the first plane (112) with a spacing; A floating stop base (3) is fixedly mounted on the second plane (241) or the first plane (112), and a distance between the floating stop base (3) and the first plane (112) or the second plane (241) is within a set range.

2. The liquefied gas ship structure design method according to claim 1, characterized in that: The anti-floating base (3) comprises a base body (31) and laminated wood (32); the base body (31) is fixedly connected to the second plane (241), and the laminated wood (32) is arranged at one end of the base body (31) away from the second plane (241); or the base body (31) is fixedly connected to the first plane (112), and the laminated wood (32) is arranged at one end of the base body (31) away from the first plane (112).

3. The liquefied gas ship structure design method according to claim 1, characterized in that: The liquid cargo tank (2) comprises a bottom plate (21), two bottom inclined plates (22), two side plates (23), two second inclined plates (24) and a top plate (25); the bottom plate (21), the bottom inclined plate (22), the side plates (23), the second inclined plates (24) and the top plate (25) are arranged to form a liquid cargo tank body; sealing plates are arranged at both ends of the liquid cargo tank body to form a closed liquid cargo tank (2).

4. The liquefied gas ship structure design method according to claim 3, characterized in that: The bottom inclined plate (22) is parallel to the inclined plate of the bottom side tank (12) of the hull (1).

5. The liquefied gas ship structure design method according to claim 3, characterized in that: The bottom plate (21), the bottom inclined plate (22), the side plate (23), the second inclined plate (24) and the top plate (25) are connected in sequence, and arc transition is adopted at the connection points.

6. The liquefied gas ship structure design method according to claim 1, characterized in that: A reinforcing rib (13) is fixedly arranged between the top side tank (11) of the hull (1) and the bottom side tank (12) of the hull (1).

7. The liquefied gas ship structure design method according to claim 1, characterized in that: The overlapping length of the projection of the first plane (112) toward the second plane (241) is not less than 1000 mm.

8. The liquefied gas ship structure design method according to claim 1, characterized in that: A middle longitudinal bulkhead is arranged in the liquid cargo tank (2), and the middle longitudinal bulkhead is located at a middle longitudinal section of the liquid cargo tank (2).

9. The liquefied gas ship structure design method according to claim 1, characterized in that: A sloshing-stopping bulkhead is arranged in the liquid cargo tank (2).

10. A vessel, characterized in that The invention comprises a hull (1) and a liquid cargo tank (2), wherein the liquid cargo tank (2) is located in the hull (1), and the hull (1) and the liquid cargo tank (2) are designed by adopting the liquefied gas ship structure design method according to any one of claims 1 to 9.

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