Optimization method for transition area of ship stem round steel and outer plate

Abstract

The invention belongs to the technical field of ship manufacturing, and particularly relates to an optimization method for a transition area between stem round steel and an outer plate of a ship. The optimization method comprises the following steps that a round steel is designed and installed on the ship bow, and the round steel is clamped through outer plates on the two sides; adjusting relative positions and welding positions of the outer plate and the round steel at different height positions of the ship, so that the round steel is in smooth transition with the outer plate at the upper end and the lower end; designing nodes in the profile map of each height position of the round steel, so that the round steel protrudes to be matched with the line type of the ship planking; the upper and lower ends of the round steel are gradually transited and are smoothly connected with the outer plate; a wood pattern is manufactured according to data provided by the nodes and used for checking the appearance and the data on site; a plurality of datum lines are designed and positioned and correspond to the datum lines of the ship body; according to the method, the attractiveness of the ship stem is improved, the water flow resistance is reduced, and the economical efficiency of ship operation is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a method for optimizing a transition area between a bow round steel and an outer plate of a ship. Background Art

[0002] In the existing shipbuilding technology, the bow is a key part of the ship structure, mainly responsible for reducing the resistance of the water flow to the ship's forward movement. Traditionally, the design of the ship's bow needs to deal with the connection problem between the round steel and the outer plate. Due to the narrow space and sharp shape of the bow area, the use of traditional steel plate construction is not only difficult to ensure the construction quality, but also difficult to meet the aesthetic requirements. In addition, although the use of castings can improve the appearance and structural strength, its cost is high, and the uncertainty of the supply chain may cause delays in construction time.

[0003] A common solution is to use a combination of steel plates and round steel, but this type of design has deficiencies in the transition between the round steel and the outer plate. Especially in large ships, the diameter of the round steel of the bow is large (for example, above D100), while the thickness of the outer plate is relatively thin (about 18-20mm), making it difficult to design the transition area between the round steel and the outer plate to be smooth and beautiful. Inappropriate transition design not only affects the appearance of the bow, but may also increase water flow resistance due to structural irregularities, thereby reducing the ship's driving efficiency and economy. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The present invention mainly aims at the above problems and proposes a method for optimizing the transition area between the round steel and the outer plate of the ship's bow, with the purpose of solving the problems of aesthetics and water flow resistance caused by the uneven transition design between the round steel and the outer plate in the prior art, thereby improving the structural efficiency and appearance quality of the ship's bow.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides a method for optimizing the transition area between the bow round steel and the outer plate of a ship, the optimization method comprising the following steps:

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

[0009] At different heights of the ship, adjust the relative position and welding position of the outer plate and the round steel to ensure smooth transition between the upper and lower ends of the round steel and the outer plate;

[0010] In the cross-section of the round steel at each height position, the nodes are designed so that the round steel protrudes to match the line shape of the ship's outer plate;

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

[0012] Make wooden molds based on the data provided by the nodes, and use them to verify the shape and data on site;

[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 mold 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 positions of the round steel for comparison work after the round steel is assembled on site.

[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 the form of full penetration welding or single-sided welding with a backing.

[0021] (III) 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 conformal 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 for Figure 1 Cross-section view at CC.

[0027] Figure 5 for Figure 1 Cross-sectional view at DD in the middle.

[0028] Figure 6 for Figure 1 Cross-sectional view at EE in the middle.

[0029] Figure 7 for Figure 1 Cross-sectional view at FF.

[0030] Figure 8 for Figure 1 Cross-section view at GG in the middle.

[0031] Fig. 9 for Figure 1 Cross-section view at HH in the middle.

[0032] Fig.10 for Figure 1 Cross-sectional view at II in the middle.

[0033] Fig.11 This is a schematic diagram of the structure of the shape-preserving template.

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

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] See also Figure 1 As shown, the present invention provides a method for optimizing the transition area between the bow round steel and the outer plate of a ship, and the optimization method comprises the following steps:

[0039] Step S1, designing and installing 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 part of a ship, which is usually sharp or rounded in shape and is designed to cut through the water flow, reduce resistance during navigation, and improve the navigation efficiency of the ship. At the bow of a ship, round steel 10 is an important structural component, usually cylindrical in shape, which serves to enhance the structural strength of the bow and optimize the water streamline. The outer plate is a steel plate covering the outside of the hull, which not only protects the internal structure from water intrusion and physical impact, but also helps to form the shape of the hull, and cooperates with the round steel 10 to ensure that the bow has good hydrodynamic performance. In general, the design and construction of the bow directly affects the navigation performance and fuel efficiency of the ship.

[0041] Figure 1 The schematic diagram in shows in detail the structural composition of the bow of the ship, including the outer plate theoretical line 20 and the outer plate thickness edge line 30, which define the theoretical boundary and actual thickness of the ship's outer plate. The round steel 10 is located at the bow and is used to enhance the structural strength of the ship's bow column and affect the interaction between the hull and the water. The schematic diagram also marks a number of section nodes, such as AA, BB, CC, DD, EE, FF, GG, HH and II, which show the connection and transition details between the round steel and the outer plate at different section positions. In addition, the figure also points out the bulbous bow area 40, which is the front end of the bow, specially designed to optimize the water flow around the effect, reduce resistance, and improve the navigation efficiency of the ship.

[0042] Step S2, at different heights of the ship, adjusting the relative position and welding position of the outer plate and the round steel, so that the round steel has a smooth transition with the outer plate at its upper and lower ends;

[0043] At different heights of the ship, the contact angle and pressure between the round steel 10 and the outer plate 50 may be different, which directly affects the streamline and structural integrity of the entire bow structure. By precisely adjusting these positions, it is possible to avoid sharp edges or uneven seams at the connection between the round steel 10 and the outer plate 50, which may cause additional turbulence and resistance in the bow, thereby affecting the navigation efficiency and fuel consumption of the ship. The smooth transition not only optimizes the hydrodynamic characteristics, but also enhances the beauty and structural strength of the bow, ensuring that the ship has better adaptability and stability when facing different water conditions, such as Figure 2 Medium AA, Figure 3 Medium BB, Fig. 9 HH and Fig.10 The cross-sectional views show how to adjust the relative positions of the round steel 10 and the outer plate 50 at different heights to achieve a smooth transition.

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

[0045] like Figure 4-Figure 8 The nodes CC to GG are shown respectively. Through the nodes (such as CC, DD, GG, etc.) shown in the cross-sectional view, the specific forms of the round steel 10 at different heights can be seen. These nodes show how the round steel 10 is adjusted according to the contour of the ship's outer plate to optimize the overall streamline shape and aesthetics of the structure. For example, at some nodes, the round steel 10 may be more protruding or deeper to adapt to the bend or angle of the outer plate 50, thereby reducing water flow resistance and improving the navigation efficiency of the ship.

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

[0047] By designing a gradual transition zone, the end of the round steel 10 will gradually blend into the shape of the 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, the end of the round steel 10 is formed using an inclined or curved cutting technique to ensure a perfect docking with the outer plate 50. This step is reflected in the AA, BB, HH and II nodes, showing the gradual transition design of the round steel 10 and the outer plate 50 at the contact point.

[0048] Step S5, making a wooden mold according to the data provided by the node, for on-site verification of the shape and data;

[0049] The conformal formwork is a prefabricated formwork that is made in advance according to the design parameters of the round steel and the specific structural requirements of the bow. These formworks are used to guide the on-site staff to make wooden formworks 70 of precise dimensions, which are used for simulation and verification before actual assembly (see Fig.11 ). By using these wooden molds, workers can check and adjust the joints between the round steel 10 and the outer plate 50 before the final installation of the round steel, ensuring that the shapes and data of all components meet the requirements of the design drawings. This method greatly improves the accuracy and efficiency of the construction process and helps avoid structural problems or additional correction costs caused by improper joints.

[0050] Step S6: design and locate multiple reference lines corresponding to the hull reference lines.

[0051] First, the main reference lines 60 in the hull structure are determined. These reference lines 60 are usually aligned with the key structural points of the hull, such as the keel, deck junctions, etc. Next, according to the installation position and design requirements of the round steel, a number of new reference lines are designed and marked on the bow of the hull. These reference lines are used to guide the specific placement of the round steel in the hull, ensuring that each part of the round steel can be accurately docked with other structural elements of the hull. By using a laser rangefinder or other precision measuring tools, the accuracy of these reference lines can be ensured, thereby ensuring the accuracy of the installation of the round steel, avoiding performance problems caused by installation errors or the need for later adjustments. For example, before installing the round steel, these reference lines are actually drawn on the hull using a laser rangefinder or other high-precision measuring tools. During installation, the round steel is positioned to the position indicated by these reference lines, ensuring that each node is strictly aligned. Subsequently, temporary fixing is performed and the alignment of each node is checked to ensure that the position of the round steel meets the design requirements.

[0052] See Fig.11 The design of the wood formwork is based on node data (such as node Y = FR246 and other marked dimensions) to ensure that the assembly of round steel and outer panels in actual construction can meet the design requirements. For example, the annotation "The gap between the wood formwork and the outer panel is about 2mm, which is convenient for assembly and adjustment" in the figure indicates that construction personnel are allowed to have a certain amount of adjustment room when assembling the round steel and outer panels in practice to accommodate possible minor errors or inconsistencies. This practice helps ensure that all components can fit smoothly 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] The wooden formwork used in the shipbuilding process has 80 through-weld holes designed at the structural welding locations, the purpose of which is to ensure the accuracy and convenience of the welding process. The through-weld holes are small holes pre-set in the wooden formwork, which correspond to the joints of the round steel and the outer plate to be welded. These holes allow the welder to accurately locate the welding points directly through the wooden formwork to ensure the correct placement of the weld. In addition, these holes also allow the welding material to pass through the wooden formwork during the welding process, helping to form a more uniform and stable weld connection.

[0054] In step S5, conformal templates are designed at multiple positions of the round steel for comparison work after the round steel is assembled on site. After the round steel is installed in the ship structure, the staff uses these conformal templates to check whether the position, angle and joint of the round steel meet the design requirements and whether there are any deviations.

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

[0056] In step S4, where the round steel meets 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 smoothly bypass the bow, reduce turbulence and resistance, and thus improve the navigation 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 welding or single-sided welding with padding. Full penetration welding means that the entire interface area where the round steel and the outer plate are in contact is thoroughly welded, which can maximize the strength and sealing of the joint, prevent the penetration of moisture and other elements, and is suitable for areas subject to high stress. Single-sided welding with padding means adding a layer of padding material between the round steel and the outer plate and welding 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 invention optimizes the installation nodes of round steel, refines and optimizes the docking nodes of round steel and outer plates at various positions, improves the aesthetics of the bow of the ship, and at the same time optimizes the line shape compared with the existing round steel design scheme, reduces water flow resistance, and improves the economy of ship operation.

[0059] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present application is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by the same unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

[0060] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A method for optimizing the transition area between the bow round steel and the outer plate of a ship, characterized in that: The optimization method comprises the following steps: Design and install a round steel bar at the bow of the ship so that the round steel bar is clamped by the outer plates on both sides; At different heights of the ship, adjust the relative position and welding position of the outer plate and the round steel to ensure smooth transition between the upper and lower ends of the round steel and the outer plate; In the cross-section of the round steel at each height position, the nodes are designed so that the round steel protrudes to match the line shape of the ship's outer plate; The upper and lower ends of the round steel are designed to transition gradually and connect smoothly with the outer plate; Make wooden molds based on the data provided by the nodes, and use them to verify the shape and data on site; Multiple reference lines are designed and positioned to correspond to the hull reference lines.

2. The method for optimizing the transition area between the bow round steel and the outer plate of a ship according to claim 1, characterized in that: The theoretical design distance between the wooden mold and the hull structure is 1-2mm.

3. The method for optimizing the transition area between the bow round steel and the outer plate of a ship according to claim 1, characterized in that: Through-welding holes are designed at the welding positions of the wooden formwork structure to facilitate comparison and positioning.

4. The method for optimizing the transition area between the bow round steel and the outer plate of a ship according to claim 1, characterized in that: Shape-preserving templates are designed at multiple locations on the round steel for comparison work after on-site round steel assembly.

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

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

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