Typesetting and transition structure of nesting plate with large plate thickness difference for roll-on-roll-off ship

Abstract

The utility model provides a typesetting and transition structure of nesting plates with larger plate thickness difference for a roll-on-roll-off ship, which comprises a plurality of deck sheets spliced in sequence, a fatigue thickening plate and four transition plates, and first notches are formed in positions with structural fatigue on the deck sheets and the peripheral sides of the positions. The length of the first notch in the direction perpendicular to the deck thin plates on the upper side and the lower side is the width of the deck thin plate where the first notch is located, the fatigue thickening plate and the transition plates are arranged in the first notch, and the four transition plates surround the periphery of the fatigue thickening plate and are located between the fatigue thickening plate and the deck thin plates. The two transition plates located on the left side and the right side of the fatigue thickening plate are arranged between the two transition plates located on the upper side and the lower side of the fatigue thickening plate, and the adjacent side faces of the deck thin plate, the transition plates and the fatigue thickening plate are tightly attached to one another. The automatic welding device is suitable for automatic welding of a machine, so that the welding efficiency and quality are improved, and welding deformation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to shipbuilding technical field especially relates to a roll on roll off ship larger plate thickness difference nested plate's layout and transition structure. BACKGROUND

[0002] With the development of new energy industry, the large export of domestic new energy vehicles, the roll on roll off ship as a kind of vehicle for transporting vehicles, trucks and other vehicles specially designed ship, in recent years, domestic shipyard has welcomed a large number of roll on roll off ship order tide. Due to its structural characteristics and stress characteristics, the fatigue problem of roll on roll off ship cargo hold is more prominent, especially in the column, vertical end and end position of cabin wall;To avoid structural fatigue problem, a large number of these position deck is locally thickened, and the thickening range of many areas is also relatively large, and the plate thickness difference between many fatigue thickening plates and adjacent thin plates exceeds the plate thickness of thin plate. The general classification society specification, such as CCS and DNV, requires that the plate thickness difference exceeding the plate thickness of thin plate needs to add transition plate in the middle, so that the deck forms a large number of nested thickening plates. Figure 1

[0003] The form of a large number of nested thickening plates is not friendly to shipyard construction and production. On the one hand, the nested thickening plate adopts arc form at the corner position to avoid stress concentration, and the shipyard needs to use manual welding in the arc area, which cannot use machine welding, so the welding efficiency is low, the welding quality is difficult to guarantee, and the welding deformation caused by manual welding is also larger. On the other hand, due to the existence of fatigue plate thickness and transition plate, there are too many deck splicing joints, the welding deformation is larger, and the appearance is also affected. The automobile deck of roll on roll off ship is generally thin, and due to the existence of the above problems, the deformation of thin plate becomes more prominent. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a roll on roll off ship larger plate thickness difference nested plate's layout and transition structure, which avoids arc manual welding and reduces the number of butt welds by reasonable layout and stiffening instead of transition plate, is suitable for machine automatic welding, so as to improve the welding efficiency and quality, and reduce the welding deformation.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0006] ​The roll-on / roll-off ship large plate thickness difference nested plate layout and transition structure includes a plurality of sequentially spliced deck thin plates, fatigue thickened plates and four transition plates, a first notch is arranged at a position where structural fatigue exists on the deck thin plate and around the position, the length of the first notch in the direction perpendicular to the upper and lower deck thin plates is the width of the deck thin plate, the fatigue thickened plate and the transition plate are arranged in the first notch, the four transition plates are arranged around the four sides of the fatigue thickened plate and between the fatigue thickened plate and the deck thin plate, the two transition plates on the left and right sides of the fatigue thickened plate are arranged between the two transition plates on the upper and lower sides of the fatigue thickened plate, and the adjacent sides of the deck thin plate, the transition plate and the fatigue thickened plate are tightly arranged.

[0007] The roll-on / roll-off ship large plate thickness difference nested plate layout and transition structure includes a deck thin plate and a fatigue thickened plate, a first notch is arranged at a position where structural fatigue exists on the deck thin plate and around the position, the length of the first notch in the direction perpendicular to the upper and lower deck thin plates is the width of the deck thin plate, the fatigue thickened plate is arranged in the first notch, and the adjacent sides of the deck thin plate and the fatigue thickened plate are tightly arranged.

[0008] Further, according to the finite element result of specific stress, the stress concentration coefficient of the fatigue thickened plate region is not more than 2, the width of the first notch in the left-right direction is reduced, the width of the fatigue thickened plate in the left-right direction is reduced, and the adjacent sides of the deck thin plate and the fatigue thickened plate are tightly arranged.

[0009] Further, the vertical distance between the reinforcing rib and the deck joint adjacent to the reinforcing rib is 50 mm.

[0010] Under the current hot shipbuilding market situation, the increasing labor cost and the difficulty in recruiting ship workers, the structure form of the utility model as an efficiency improving measure is also compatible with the wide application of robot welding in shipyards, can be applied to various regions of ship structures, and creates more application scenarios and basic conditions for intelligent manufacturing of shipyards. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The roll-on / roll-off ship large plate thickness difference nested plate layout and transition structure of the utility model embodiment 1 is shown in the schematic view.

[0012] Figure 2 The roll-on / roll-off ship large plate thickness difference nested plate layout and transition structure of the utility model embodiment 2 is shown in the schematic view.

[0013] Figure 3The roll-on roll-off ship large plate thickness difference nested plate layout and transition structure schematic diagram of the embodiment 3 of the utility model discloses;

[0014] Figure 4 The roll-on roll-off ship large plate thickness difference nested plate layout and transition structure of the utility model discloses a structure transition node form;

[0015] Figure 5 The stress result of the embodiment 2 of the utility model discloses;

[0016] Figure 6 The form of the original nested thickening plate;

[0017] Figure 7 The stress result of the form of the original nested thickening plate.

[0018] Wherein, 1 - deck thin plate, 2 - transition plate, 3 - fatigue thickening plate, 4 - reinforcing rib, 5 - deck plate seam, 21 - transition plate plate seam, 31 - fatigue thickening plate plate seam, 32 - circular arc seam. Specific implementation

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0020] As Figure 6 Shown, a kind of roll-on roll-off ship large plate thickness difference nested plate structure, the structure form at least includes deck thin plate 1, transition plate 2, fatigue thickening plate 3, deck plate seam 5, transition plate plate seam 21 and thickening plate plate seam 31, the deck thin plate transition plate 2 and fatigue thickening plate 3 are located between deck thin plate plate row, fatigue thickening plate 3 width is less than the width of transition plate 2, deck plate seam 5 width is greater than the width of transition plate 2, transition plate plate seam 21 and thickening plate plate seam 31 are " back " character shape, plate seam corner position is according to specification arc transition;At this time due to the existence of deck plate seam 5, transition plate plate seam 21, thickening plate plate seam 31 and circular arc seam 32, welding efficiency is lower, and weld formation quality is poor, to improve the problem, structure needs to be adjusted. Embodiment

[0021] In Figure 6 Shown on the basis of the roll-on roll-off ship large plate thickness difference nested plate structure, the rib position of the transition plate plate seam 21 of the front and rear sides of transition plate 2 perpendicular to deck plate seam 5 does not change, the upper and lower sides of transition plate plate seam 21 are all translated to deck plate seam 5, the rib position of the thickening plate plate seam 31 of the front and rear sides of thickening plate 3 does not change, the upper and lower sides of thickening plate plate seam 31 extend horizontally to the position before the translation of transition plate plate seam 21, and arc plate is cancelled, i. e.Figure 1 The layout and transition structure of a large plate thickness difference nested plate of a roll-on / roll-off ship is shown, which comprises a plurality of sequentially spliced deck thin plates 1, fatigue thickening plates 3 and four transition plates 2. First notches are provided on the deck thin plates 1 at positions where structural fatigue exists and around the sides thereof. The length of the first notches in the direction perpendicular to the upper and lower deck thin plates 1 is the width of the deck thin plate 1 where the first notch is located. The fatigue thickening plates 3 and the transition plates 2 are arranged in the first notches. The four transition plates 2 are arranged around the four sides of the fatigue thickening plate, between the fatigue thickening plate 3 and the deck thin plate 1. Two transition plates 2 located on the left and right sides of the fatigue thickening plate 3 are arranged between two transition plates 2 located on the upper and lower sides of the fatigue thickening plate 3. The structural dimensions of the two transition plates 2 located on the left and right sides of the fatigue thickening plate 3 can be the same or different. The structural dimensions of the two transition plates 2 located on the upper and lower sides of the fatigue thickening plate 3 can be the same or different. The adjacent sides of the deck thin plates 1, the transition plates 2 and the fatigue thickening plates 3 are closely arranged. The plate joint corner position is a right angle transition.

[0022] In this example, the width of the transition plate is 2200mm, and the deck plate column width is 2480mm after considering the spacing with binding and other structures, which is slightly larger than the width of the transition plate. Embodiment

[0023] In Figure 1 On the basis of the large plate thickness difference nested plate structure of the roll-on / roll-off ship shown, the transition plate 2 is cancelled, the fatigue thickening plate 3 is expanded to the range of the transition plate 2 and directly abuts against the deck thin plate 1, that is, the thickening plate joint 31 on the four sides of the fatigue thickening plate 3 coincides with the respective adjacent deck plate column joint 5 as shown. Figure 2 The layout and transition structure of a large plate thickness difference nested plate of a roll-on / roll-off ship is shown, which comprises a plurality of sequentially spliced deck thin plates 1, fatigue thickening plates 3 and four transition plates 2. First notches are provided on the deck thin plates 1 at positions where structural fatigue exists and around the sides thereof. The length of the first notches in the direction perpendicular to the upper and lower deck thin plates 1 is the width of the deck thin plate 1 where the first notch is located. The fatigue thickening plates 3 and the transition plates 2 are arranged in the first notches. The four transition plates 2 are arranged around the four sides of the fatigue thickening plate, between the fatigue thickening plate 3 and the deck thin plate 1. Two transition plates 2 located on the left and right sides of the fatigue thickening plate 3 are arranged between two transition plates 2 located on the upper and lower sides of the fatigue thickening plate 3. The structural dimensions of the two transition plates 2 located on the left and right sides of the fatigue thickening plate 3 can be the same or different. The structural dimensions of the two transition plates 2 located on the upper and lower sides of the fatigue thickening plate 3 can be the same or different. The adjacent sides of the deck thin plates 1, the transition plates 2 and the fatigue thickening plates 3 are closely arranged. The plate joint corner position is a right angle transition.

[0024] The direct transition joint of the fatigue thickening plate 3 and the deck thin plate 1 is shown in Figure 4 ; from the comparison of the finite element results, the stress results of the fatigue thickening plate 3 and the deck thin plate 1 directly transitioned are within the acceptable range, as shown in Figure 5 and Figure 7 . Embodiment

[0025] Based on the finite element results of the specific stress, when the stress concentration factor in the fatigue-thickened plate region does not exceed 2, Figure 2 Based on the nested plate structure with a large plate thickness difference shown in the ro-ro ship diagram, the width of the first notch in the left-right direction is reduced, and the width of the fatigue thickened plate 3 in the left-right direction is also reduced. Furthermore, the adjacent sides of the deck thin plate and the fatigue thickened plate are tightly fitted together. That is, the positions of the fatigue thickened plate seams 31 on the upper and lower sides of the fatigue thickened plate 3 remain unchanged, while the fatigue thickened plate seams 31 on the left and right sides of the fatigue thickened plate 3 are reduced inwards to... Figure 6 The positions of the fatigue-strengthened plate joints 31 on the left and right sides of the fatigue-strengthened plate 3 are shown, as follows: Figure 3 As shown; and add reinforcing rib 4 to the thin plate position 50mm near the joint, as shown. Figure 4 As shown;

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A layout and transition structure for nested plates with large thickness differences in roll-on / roll-off (Ro-Ro) vessels, characterized in that, The device comprises multiple sequentially spliced ​​deck plates, fatigue-strengthened plates, and four transition plates. A first notch is provided on the deck plates at locations of structural fatigue and on their surrounding sides. The length of the first notch in the direction perpendicular to the upper and lower deck plates is equal to the width of the deck plate in which it is located. The fatigue-strengthened plates and transition plates are located within the first notch. The four transition plates surround the fatigue-strengthened plates and are situated between the fatigue-strengthened plates and the deck plates. Two transition plates located on the left and right sides of the fatigue-strengthened plates are positioned between two transition plates located on the upper and lower sides of the fatigue-strengthened plates. The adjacent sides of the deck plates, transition plates, and fatigue-strengthened plates are all tightly abutted against each other.

2. The layout and transition structure of nested plates with large thickness differences in roll-on / roll-off ships according to claim 1, characterized in that, The device includes a deck sheet and a fatigue-reinforced plate. A first notch is provided on the deck sheet at the location of structural fatigue and on its surrounding sides. The length of the first notch in the direction perpendicular to the upper and lower sides of the deck sheet is equal to the width of the deck sheet. The fatigue-reinforced plate is located within the first notch. The adjacent sides of the deck sheet and the fatigue-reinforced plate are closely attached. A reinforcing rib is vertically provided on the lower end face of the deck sheet on the side of the deck sheet joint away from the fatigue-reinforced plate.

3. The layout and transition structure of nested plates with large thickness differences in roll-on / roll-off ships according to claim 2, characterized in that, Based on the finite element results of the specific stress, the stress concentration factor in the fatigue thickened plate area does not exceed 2. The width of the first notch in the left and right directions is reduced, and the width of the fatigue thickened plate in the left and right directions is also reduced. Furthermore, the adjacent sides of the thin plate and the fatigue thickened plate are tightly attached to each other.

4. The layout and transition structure of nested plates with large thickness differences in roll-on / roll-off ships according to claim 3, characterized in that, The vertical distance between the reinforcing rib and the adjacent deck plate seam is 50mm.

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