A method for optimizing the transition area of a ship's stem round bar and outer plate

Abstract

The application belongs to the technical field of shipbuilding, and particularly relates to a method for optimizing the transition area of a round steel and an outer plate of a bow column of a ship. The method comprises the following steps: a round steel is designed and installed at the bow of the ship, so that the round steel is clamped by the outer plates on both sides; the relative position and the welding position of the outer plates and the round steel are adjusted at different height positions of the ship, so that the round steel is smoothly connected with the outer plates at the upper and lower ends thereof; a node is designed in the cross-sectional view of each height position of the round steel, so that the round steel protrudes to match the outer plate line of the ship; the upper and lower ends of the round steel are gradually connected with the outer plates; a wooden mold is made according to the data provided by the node, which is used for checking the shape and data on site; and a plurality of reference lines are designed and positioned, which correspond to the reference lines of the ship body. The method improves the aesthetic appearance of the bow column of the ship, reduces the water flow resistance, and improves the economy of the ship operation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shipbuilding, and specifically relates to a method for optimizing the transition area of a ship's bow column round steel and outer plate. BACKGROUND

[0002] In the existing shipbuilding technology, the bow column is a key part of the ship structure, mainly responsible for reducing the resistance of water flow to the ship when it is moving forward. Traditionally, the design of the ship's bow column needs to deal with the connection problem of round steel and outer plate. Due to the narrow space and sharp shape of the bow column area, using traditional steel plate structure not only makes it difficult to ensure the construction quality, but also makes it difficult to achieve the requirement of beauty. In addition, although the use of castings can improve the appearance and structural strength, the cost is relatively high, and the uncertainty of the supply chain may cause the construction time to be delayed.

[0003] The common solution is to use a combination of steel plates and round steel, but such design has deficiencies in the transition treatment of round steel and outer plate. Especially in large ships, the diameter of the bow column round steel is large (such as D100 or more), while the thickness of the outer plate is relatively thin (about 18-20mm), making it difficult to design the transition area of round steel and outer plate to be smooth and beautiful. Improper transition design not only affects the appearance of the bow column, but also may increase the water flow resistance due to the structure, thereby reducing the driving efficiency and economy of the ship. SUMMARY

[0004] (I) Technical problems to be solved

[0005] The present application mainly aims at the above problems, and proposes a method for optimizing the transition area of the ship's bow column round steel and outer plate, which aims to solve the problems of appearance and water flow resistance caused by the unsmooth transition design of round steel and outer plate in the prior art, thereby improving the structural efficiency and appearance quality of the ship's bow column.

[0006] (II) Technical solutions

[0007] To achieve the above-mentioned purpose, the present application provides a method for optimizing the transition area of the ship's bow column round steel and outer plate, which comprises the following steps:

[0008] Design and install a round steel at the bow of the ship, so that the round steel is clamped by the outer plate on both sides;

[0009] Adjust the relative position and welding position of the outer plate and the round steel at different height positions of the ship, so that the round steel is smoothly transitioned at its upper and lower ends with the outer plate;

[0010] In the cross-sectional view of each height position of the round steel, design nodes to make the round steel protrude to match the outer plate line;

[0011] Design the upper and lower ends of the round steel to gradually transition and smoothly connect with the outer plate;

[0012] Make wooden molds based on the data provided by the nodes for on-site verification of shape and data;

[0013] Multiple reference lines are designed and positioned to correspond to the hull reference lines.

[0014] Furthermore, the theoretical design distance between the wooden formwork and the hull structure is 1-2 mm.

[0015] Furthermore, the wooden formwork is designed with through-welding holes at the structural welding positions to facilitate comparison and positioning.

[0016] Furthermore, shape-preserving templates are designed at multiple locations of the round steel for comparison work after on-site round steel assembly.

[0017] Furthermore, the diameter of the round steel is greater than or equal to 100 mm.

[0018] Furthermore, the thickness of the outer plate is between 18 mm and 20 mm.

[0019] Furthermore, a gradually protruding design is adopted at the transition between the round steel and the outer plate.

[0020] Furthermore, the round steel and the outer plate are welded in a full penetration or single-sided welding with a backing.

[0021] (3) Beneficial effects

[0022] Compared with the prior art, the present invention provides a method for optimizing the transition area between the round steel and the outer plate of the bow of a ship, which solves the above-mentioned technical problems through a series of innovative design and construction technologies. First, the present invention adopts a customized shape-keeping template and reference line design to ensure the precise docking and welding of the round steel and the outer plate at various height positions, thereby achieving a smooth transition. In addition, by designing a gradually transitioning structure at the upper and lower ends of the round steel, the contact surface between the round steel and the outer plate is optimized, and the additional water flow resistance caused by improper transition is reduced. The present invention also includes the use of wooden molds for on-site verification to ensure that the position and shape of the round steel are consistent with the design, further improving the accuracy and efficiency of construction. Through these methods, the present invention not only improves the appearance and structural performance of the bow of the ship, but also improves the economy and reliability of the overall construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a side view of the bow of a ship disclosed in this application.

[0024] Figure 2 for Figure 1 Cross-section view at AA in the middle.

[0025] Figure 3 for Figure 1 Cross-section view at the middle BB.

[0026] Figure 4 is Figure 1 a sectional view taken along line C-C.

[0027] Figure 5 is Figure 1 a sectional view taken along line D-D.

[0028] Figure 6 is Figure 1 a sectional view taken along line E-E.

[0029] Figure 7 is Figure 1 a sectional view taken along line F-F.

[0030] Figure 8 is Figure 1 a sectional view taken along line G-G.

[0031] Figure 9 is Figure 1 a sectional view taken along line H-H.

[0032] Figure 10 is Figure 1 a sectional view taken along line I-I.

[0033] Figure 11 is a structural schematic diagram of a keep form.

[0034] Reference signs in the drawing: 10, round steel; 20, theoretical line of outer plate; 30, plate thickness edge line of outer plate; 40, bulbous bow area; 50, outer plate; 60, reference line; 70, wooden formwork; 80, through welding hole. DETAILED DESCRIPTION

[0035] The application will be described in greater detail with reference to the drawings, in which embodiments of the application are illustrated by way of example. It is obvious to a person skilled in the art that the application is not limited to the embodiments described and illustrated, but can be modified in a variety of ways without departing from the scope of the application. The embodiments described and illustrated are only some of the embodiments of the application, and all other embodiments obtained by a person skilled in the art based on the embodiments described and illustrated without creative work belong to the scope of the application.

[0036] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. When an element is referred to as being "positioned on" another element, it can be directly positioned on the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions are used only for the purpose of illustration.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] Referring to the drawings Figure 1 As shown in the drawings, the present application provides an optimization method for the transition area between the bow stem round steel and the outer plate of a ship, which comprises the following steps:

[0039] Step S1, design and install a round steel at the bow of the ship, so that the round steel is clamped by the outer plates on both sides;

[0040] The "bow" of a ship refers to the front end portion of the ship, which is usually sharp or rounded in shape, designed to cut through water flow, reduce resistance during navigation, and improve the navigation efficiency of the ship. In the bow of the ship, the round steel 10 is an important structural component, usually in the shape of a cylinder, which serves to enhance the structural strength of the bow and optimize the water flow line. The outer plate is a steel plate covering the outer side of the ship's hull, which not only protects the internal structure from water intrusion and physical impact, but also helps to form the shape of the ship's hull, working with the round steel 10 to ensure that the bow has good hydrodynamic performance. In general, the design and construction of the bow directly affect the navigation performance and fuel efficiency of the ship.

[0041] Figure 1 The schematic diagram in the drawings shows the structural composition of the bow of the ship in detail, including the outer plate theoretical line 20 and the outer plate plate thickness edge line 30, which define the theoretical boundary and actual thickness of the outer plate of the ship. The round steel 10 is located in the bow to enhance the structural strength of the bow stem of the ship and affect the interaction between the ship's hull and water. The schematic diagram also marks a plurality of section nodes, such as A-A, B-B, C-C, D-D, E-E, F-F, G-G, H-H, and I-I, which show the connection and transition details of the round steel and the outer plate at different section positions. In addition, the figure also indicates the bulbous bow area 40, which is the front end of the bow, specially designed to optimize the water flow around the flow effect, reduce resistance, and improve the navigation efficiency of the ship.

[0042] Step S2, adjust the relative position and welding position of the outer plate and the round steel at different height positions of the ship, so that the round steel is smoothly transitioned at its upper and lower ends with the outer plate;

[0043] The contact angle and pressure of round steel 10 with the outer plate 50 may vary at different height positions of the ship, which directly affects the streamlining and structural integrity of the entire bow structure. By precisely adjusting these positions, sharp edges or uneven joints at the connection between round steel 10 and outer plate 50 can be avoided, which may cause additional turbulence and resistance in the bow, affecting the sailing efficiency and fuel consumption of the ship. Smooth transitions not only optimize the hydrodynamic properties of the flow, but also enhance the aesthetics and structural strength of the bow, ensuring better adaptability and stability of the ship in different water conditions, such as Figure 2 A-A, Figure 3 B-B, Figure 9 H-H and Figure 10 I-I nodes, which show how the relative position of round steel 10 and outer plate 50 is adjusted at different heights to achieve smooth transitions.

[0044] Step S3, in the cross-sectional view of each height position of the round steel, the node is designed so that the round steel protrudes to match the ship's outer plate line;

[0045] As Figures 4-8 C-C to G-G nodes are shown, through the nodes shown in the cross-sectional view (such as C-C, D-D, G-G, etc.), the specific form of round steel 10 at different heights can be seen, and these nodes show how round steel 10 is adjusted according to the profile of the ship's outer plate to optimize the overall streamlining and aesthetics of the structure. For example, at some nodes, round steel 10 may protrude more or be deeper to adapt to the curvature or angle of outer plate 50, thereby reducing water flow resistance and improving the sailing efficiency of the ship.

[0046] Step S4, design the gradual transition of the upper and lower ends of the round steel, and smoothly connect with the outer plate;

[0047] By designing a gradual transition zone, the end of round steel 10 will gradually blend into the shape of outer plate 50, eliminating any sharp or irregular edges and ensuring a smoother appearance of the entire bow. This smooth interface not only improves the hydrodynamic efficiency of the ship, but also helps to enhance the overall aesthetics and structural integrity of the hull. In actual operation, inclined or curved cutting techniques will be used to form the end of round steel 10 to ensure perfect docking with outer plate 50. This step is reflected in A-A, B-B, H-H and I-I nodes, which show the gradual transition design of round steel 10 and outer plate 50 at the contact point.

[0048] Step S5, make wooden models according to the data provided by the nodes for on-site verification of the shape and data;

[0049] The form templates are prefabricated templates that are made in advance based on the design parameters of the round steel and the specific structural requirements of the bow. These templates are used to guide the on-site workers in creating wooden templates 70 of precise dimensions, which are then used for simulation and verification before actual assembly (see Figure 11 ). By using these wooden templates, workers can check and adjust the butt joint between the round steel 10 and the outer plate 50 before the final installation of the round steel, ensuring that the shape and data of all components meet the requirements of the design drawings. This method greatly improves the accuracy and efficiency of the construction process, helping to avoid structural problems or additional correction costs caused by improper butt joint.

[0050] Step S6, design and position multiple reference lines corresponding to the hull reference lines.

[0051] First, determine the main reference lines 60 in the hull structure, which are usually aligned with key points of the hull structure such as the keel, deck intersection, etc. Next, according to the installation position of the round steel and the design requirements, design and mark multiple new reference lines on the bow of the hull. These reference lines are used to guide the specific placement position of the round steel in the hull, ensuring that each part of the round steel can be accurately butt jointed with other structural elements of the hull. By using a laser range finder or other precise measuring tools, the accuracy of these reference lines can be ensured, thereby ensuring the accuracy of the round steel installation and avoiding performance problems or the need for later adjustment caused by installation errors. For example, before installing the round steel, use a laser range finder or other high-precision measuring tools to actually draw these reference lines on the hull. During installation, position the round steel to the position indicated by these reference lines to ensure that each node is strictly aligned. Then, temporarily fix and check the alignment of each node to ensure that the position of the round steel meets the design requirements.

[0052] See Figure 11 , the design of the wooden template is based on node data (such as node Y = FR246 and other annotated dimensions), ensuring that the assembly of the round steel and the outer plate in actual construction meets the design requirements. For example, the annotation "Wooden template and outer plate gap about 2mm, easy to assemble and adjust" in the figure indicates that the construction personnel are allowed to have a certain adjustment allowance when actually assembling the round steel and the outer plate to adapt to possible minor errors or inconsistencies. This approach helps to ensure that all components can be smoothly fitted without causing installation difficulties or requiring excessive physical adjustments due to strict zero-gap restrictions, thereby avoiding damage to materials or affecting the integrity of the structure.

[0053] In the shipbuilding process, wooden molds are used, and the structure welding position is designed with through-welding holes 80, which are designed to ensure the accuracy and convenience of the welding process. Through-welding holes are small holes pre-set on the wooden mold, which correspond to the joint points of round steel and outer plate to be welded. These holes allow the welder to accurately position the welding points directly through the wooden mold, ensuring the correct placement of the weld. In addition, these holes also allow the welding material to pass through the wooden mold during the welding process, helping to form a more uniform and stable welding connection.

[0054] In step S5, a plurality of position design templates for the round steel are designed for comparison work after the round steel is assembled on site. After the round steel is installed in the ship structure, the workers use these templates to check whether the position, angle and joint of the round steel meet the design requirements and whether there is deviation.

[0055] In this embodiment, the diameter of the round steel is greater than or equal to 100mm, for example D120. The thickness of the outer plate is between 18mm and 20mm.

[0056] In step S4, at the junction of the round steel and the outer plate, the shape and size of the round steel gradually protrude from the inside to the outside, forming a smooth convex transition. Such a transition can better guide the water flow to flow smoothly around the bow, reducing turbulence and resistance, thereby improving the sailing efficiency of the ship.

[0057] In this embodiment, the welding method of the round steel and the outer plate can be selected as full penetration or single-sided welding with a gasket. Full penetration means that the entire interface area between the round steel and the outer plate is thoroughly welded, which can maximize the strength and sealing of the joint, preventing the penetration of moisture and other elements, and is suitable for areas that bear high stress. Single-sided welding with a gasket is to add a layer of gasket material between the round steel and the outer plate, and to weld only on one side. This method is convenient for quick operation when maintenance or replacement of parts is required.

[0058] The optimization method of the present application optimizes the installation nodes of the round steel, refines and optimizes the butt joint nodes of the round steel at each position with the outer plate, improves the aesthetics of the bow stem of the ship, and optimizes the line type compared to existing round steel design schemes, reduces water flow resistance, and improves the economic efficiency of ship operation.

[0059] Therefore, embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein. No feature of the description should be considered critical unless expressly stated as such. Moreover, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Furthermore, the words "comprise", "comprising", "comprises" and "comprising" do not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. Multiple references to "first", "second", etc. do not preclude a single one, several or only one of the elements. The implementation of a software program, if any, is matters of choice dependent on the

[0060] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A method for optimizing the transition area between a bow stem round bar and an outer plate of a ship, characterized in that, The optimization method comprises the following steps: A round steel is designed and installed at the bow of the ship, so that the round steel is clamped by the outer plates on both sides; The relative positions of the outer plates and the round steel and the welding positions are adjusted at different height positions of the ship, so that the round steel is smoothly connected with the outer plates at the upper and lower ends thereof; In the cross-sectional view of each height position of the round steel, a node is designed, so that the round steel is protruded to match the outer plate line type; The upper and lower ends of the round steel are gradually connected with the outer plates; Wooden molds are made according to the data provided by the node, which are used for on-site verification of the shape and data; A plurality of reference lines are designed, which correspond to the reference lines of the ship body.

2. The method for optimizing the transition area of a bulbous bow of a ship according to claim 1, characterized in that, The distance between the wooden molds and the theoretical value of the ship body structure design is 1-2 mm.

3. The method for optimizing the transition area of a bulbous bow of a ship according to claim 1, characterized in that, Welding holes are designed at the welding positions of the wooden mold structure, which are used for convenient comparison and positioning.

4. The method for optimizing the transition area of a bulb round bar to the hull plating of a ship according to claim 1, characterized in that, Shape-keeping templates are designed at a plurality of positions of the round steel, which are used for comparison after on-site assembly of the round steel.

5. The method for optimizing the transition area of a bulb round bar to the hull plating of a ship according to claim 1, characterized in that, The diameter of the round steel is greater than or equal to 100 mm.

6. The method for optimizing the transition area of a bulb round bar to the hull plating of a ship according to claim 1, characterized in that, The thickness of the outer plate is between 18 mm and 20 mm.

7. The method for optimizing the transition area of a bow stem round bar to hull plating of a ship according to claim 1, characterized in that, A gradually protruding design is adopted at the transition of the round steel and the outer plate.

8. The method for optimizing the transition area of a bulbous bow of a ship according to claim 1, characterized in that, The welding form of the round steel and the outer plate is full penetration or single-sided welding with a backing pad.

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