Equivalent simplification method and system for double-layer bottom web beam section with same mechanical property in stranding scene

Abstract

The invention relates to the field of structure simplification with the same mechanical property, in particular to an equivalent simplification method and system for a double-layer bottom web beam section with the same mechanical property in a stranding scene. Based on a preset web beam structure unit, determining a single web beam unit at the bottom of the hull and the size thereof; non-distortion geometry and distortion needing to be designed in the target simplified flat plate structure system are determined; determining a single flat plate section geometric transformation criterion and a transformed geometry of the simplified flat plate structure system; preliminarily determining an obstacle input load of the flat plate structure system with determined geometry in a stranding scene; and in order to compensate errors caused by size rounding of the converted simplified flat plate structure system in actual engineering, collision mass compensation is provided for the flat plate structure system based on dimensional analysis, and an equivalent simplified flat plate structure system is obtained. According to the method, the problem of inconsistent mechanical properties of simplified double-layer bottom web beams is solved, and the efficiency of rapidly forecasting the strength of the hull double-layer bottom structure in the stranding scene can be remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of simplification of structures with identical mechanical properties, and in particular relates to a method and system for equivalent simplification of the cross-section of a double-bottom web beam with identical mechanical properties in a stranded scenario. Background Art

[0002] When a ship is stranded or collides, the damage and failure of the side and bottom structures will directly reduce the safety of the ship and cause serious casualties and property losses. As an important structural unit of the double-bottom structure, the crashworthiness of the web beam under the stranding condition has important research significance in the field of ship structure design. In a typical double-bottom structure of a ship, the web beam is usually designed with uniformly distributed reinforcement ribs to provide the required structural strength and stability. This means that when using a scaled model to explore the crashworthiness of the prototype structure, the scaled model is required to simulate the dense reinforcement of the prototype in a limited space.

[0003] For large-scale structures like ships, a large scale ratio is often used to achieve a smaller overall scale model to meet laboratory conditions. However, due to the smaller plate thickness of the scaled model at large scale ratios, significant welding deformation occurs at the welds between the reinforcement and web beams, significantly affecting the prediction of the scaled structure's dynamic response to the prototype. To mitigate this effect, recent scaled model designs have tended to simplify the original densely reinforced web beams with flat plate structures.

[0004] The simplified method of flat plate structure has significant advantages and can improve the structural controllability and processing efficiency of scaled models. However, this structural simplification of replacing densely reinforced web beams with flat plate structures brings new problems, namely the inconsistency of crashworthiness and deformation modes between the simplified flat plate structure and the web beams. The key to solving this problem is to develop a simplified method suitable for the web beams of double-bottom structures and obtain a flat plate structure model with the same mechanical properties. Based on the dimensional analysis method and the research foundation of the dominant mechanical behavior, the present invention aims to achieve consistency in the dominant mechanical behavior and response results under the stranded condition, and provides an equivalent simplified method for the cross-section of double-bottom web beams with the same mechanical properties under the stranded scenario, so as to realize the inversion of the structural dynamic characteristics of the reinforced web beams through a flat plate structure, and provide guidance for the study of the crashworthiness response of hull structures.

[0005] The present invention focuses on the dynamic response of the web beam structure of a typical double-bottom ship structure in a grounding scenario, and provides an equivalent simplification method for the double-bottom web beam section with the same mechanical properties in a grounding scenario. The given method can be used to simplify the double-bottom web beam section that is susceptible to collision loads in a grounding scenario. The present invention has better applicability to the problem of ship navigation and grounding.

[0006] The collision resistance of the hull structure determines its safety and vitality during ocean navigation, and the hull structure itself is a complex physical connection of multiple basic structural units. Therefore, the hull design must master the collision impact damage characteristics of the basic structural units. The web beam is an important basic structure in the double-bottom structure of the ship. An equivalent simplification method for the double-bottom web beam section with the same mechanical properties is established, and the complex web beam structure is simplified into a simplified flat plate structure while ensuring that it has the same mechanical properties. This can significantly improve the efficiency of rapid prediction of the strength of the double-bottom structure of the hull in a stranded scenario. In view of this, the present invention proposes an equivalent simplification method for the double-bottom web beam section with the same mechanical properties, which has high accuracy, simple process and wide applicability, to help simplify and quickly predict the strength of the hull bottom structure in a stranded scenario. Summary of the Invention

[0007] The present invention provides an equivalent simplification method for the cross-section of a double-bottom web beam with the same mechanical properties under a stranded scenario, which can solve the problem of inconsistent mechanical properties when the web beam structure is simplified to a flat plate structure, and can significantly improve the efficiency of rapid prediction of the strength of the double-bottom structure of the hull under a stranded scenario.

[0008] The present invention provides a double-bottom web beam cross-section equivalent simplification system with the same mechanical properties under a stranded scenario, which is used to implement a double-bottom web beam cross-section equivalent simplification method with the same mechanical properties under a stranded scenario.

[0009] The present invention is achieved through the following technical solutions: A method for simplifying the cross-section of a double-bottom web beam with the same mechanical properties under a stranding scenario comprises the following steps: Step 1: Based on the preset web beam structural element, determine the single web beam element and its size at the bottom of the hull; Step 2: Establish the target simplified non-distorted geometry of the plate structure system and the distortion to be designed; Step 3: Establish the geometric transformation criteria of a single flat plate section of the simplified flat plate structure system and the geometry after transformation; Step 4: With the goal of achieving similar input collision energies between the double-layer low-web beam system and the simplified flat plate structure system, preliminarily establish the obstacle input load for the flat plate structure system with the above geometric design in the grounding scenario; Step 5: In order to compensate for the error caused by the rounding of dimensions in the converted simplified flat plate structure system in actual engineering, collision mass compensation is proposed for the flat plate structure system based on dimensional analysis to obtain an equivalent simplified flat plate structure system.

[0010] Furthermore, the single web beam element and its size in step 1 include: Strip width b p , strip thickness hp , web height of web beam h w , web thickness of web beam t w , web beam top reinforcement width b f , thickness of the top reinforcement panel of the web beam t f .

[0011] Furthermore, the step 2 is specifically to simplify the geometric dimensions of a single unit strip plate of the flat plate structure system to a non-distorted geometry, including the strip plate length, width and plate thickness are consistent with a single web beam unit, Right now: .

[0012] Furthermore, the step 3 is specifically as follows: the fully plastic axial force of a single flat plate section of the flat plate structural system is consistent with that of a single web beam element:

[0013] The web thickness of a single flat plate section of a flat plate structural system is consistent with that of a single web beam element:

[0014] Among them, the fully plastic axial force N 0 by calculate, is the yield strength of the structural material, is the cross-sectional area of ​​a single unit.

[0015] Furthermore, the step 4 is specifically as follows: the obstacle contact position:

[0016] in, Z is the obstacle contact position; Obstacle contact speed:

[0017] in, v 0 is the obstacle contact speed; Equivalent contact quality:

[0018] in, M I For considerable contact quality.

[0019] Furthermore, the step 5 specifically includes compensating the collision mass:

[0020] in,M S For structural quality, is the structural mass proportional factor.

[0021] A system for equivalent simplification of a double-bottom web beam section with the same mechanical properties in a grounding scenario, the system using the above-mentioned method for equivalent simplification of a double-bottom web beam section with the same mechanical properties in a grounding scenario, comprising: Parameter establishment module for a single web beam unit at the bottom of the hull: This module establishes the single web beam unit and its dimensions at the bottom of the hull based on the preset web beam structural unit. Establishment of non-distorted geometry and design of distorted geometry: Establishment of the non-distorted geometry and the distortion to be designed in a simplified flat plate structural system; Geometric transformation criteria and geometric dimension establishment module: establish geometric transformation criteria and geometric dimensions of a single flat plate section in a simplified flat plate structure system; Obstacle Input Load Establishment Module: This module preliminarily establishes the obstacle input load for the flat plate structure system in the grounding scenario, with the goal of achieving similar input collision energy between the two collision systems. Error compensation module: In order to compensate for the error caused by size rounding in the converted simplified flat plate structure in actual engineering, collision mass compensation is proposed for the above flat plate structure system based on dimensional analysis to obtain an equivalent simplified flat plate structure system.

[0022] One of the above methods is applied to the simplified rapid prediction of the strength of the ship bottom structure in a grounding scenario.

[0023] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method described above is implemented.

[0024] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0025] The beneficial effects of the present invention are: The present invention addresses the key issues of the lack of cross-section simplification methods for the web beams of important basic structures commonly used in hull bottom structures in engineering practice, and the inconsistent mechanical properties after simplification. It also proposes a targeted method and establishes an equivalent simplification method for the cross-section of double-layer bottom web beams with the same mechanical properties under a stranded scenario, providing a method for accurately and quickly predicting the structural strength of web beam cross-section simplification and hull bottom stranded conditions when the hull bottom is simplified. With the goal of achieving consistency in the main mechanical behaviors, a cross-section design method for the conversion between the web beam and the simplified flat plate structure is established, achieving consistency in the main mechanical behaviors of the web beams of the important basic units of the hull bottom under the action of lateral collision loads. Furthermore, the equivalent simplification method for the cross-section of the double-layer bottom web beam is applicable to various test conditions and limitations of engineering materials, and the simplified flat plate structure collision system designed by the method can comprehensively reflect the typical dynamic response of the original hull bottom structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the collision load on the web beam at the bottom of the hull in the stranding scenario of the present invention.

[0027] Figure 2 It is a flow chart of the method of the present invention.

[0028] Figure 3 It is a schematic diagram of a single reinforcement unit of the hull bottom structure of the present invention.

[0029] Figure 4 It is a schematic diagram of a single reinforced unit of the simplified flat plate structure of the present invention. DETAILED DESCRIPTION

[0030] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obstructing the description of the present application with unnecessary details.

[0031] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0032] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] The following is a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the specification of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0035] Implementation Method 1 The embodiment of the present invention provides a method for simplifying the cross section of a double-bottom web beam with the same mechanical properties under a stranded scenario. The present invention is directed to the web beam, an important basic structural component of the double-bottom structure of a ship, and focuses on a typical ship stranded scenario, providing a method for quickly and accurately evaluating and assessing the dynamic response of the double-bottom structure of an actual ship through an easy-to-operate simplified flat plate structure. Therefore, the service object of the present invention can be described by a typical cross section of a double-bottom web beam. In the method for simplifying the cross section of a double-bottom web beam of the present invention, the schematic diagram of the cross section of the web beam of the bottom of the hull subjected to collision load under a stranded scenario is shown as follows: Figure 1 As shown in Figure 2, the load conditions can be described by the contact position, contact velocity, and equivalent contact mass of the obstacle.

[0036] To represent the parameters of the hull bottom web beam and the simplified flat plate reinforced structure model, the subscript W represents the hull bottom web beam structure parameters () W , where the subscript F represents the simplified plate structure model parameters () F .

[0037] like Figure 2 As shown, the method includes the following steps: Step 1: Based on the preset web beam structural element, determine the single web beam element and its size at the bottom of the hull; Step 2: Establish the undistorted geometry and the distortion to be designed in the simplified plate structure system; Step 3: Based on the principle of consistent main structural dynamic behavior of the hull bottom structure in the grounding scenario, the geometric conversion criteria for a single flat plate section of the simplified flat plate structure system and the converted geometry are established to achieve consistent structural dynamic asymptotic behavior in the ship grounding scenario; Step 4: With the goal of achieving similar input collision energies between the double-layer low-web beam system and the simplified flat plate structure system, preliminarily establish the obstacle input load for the flat plate structure system with the above geometric design in the grounding scenario; Step 5: To compensate for the error caused by dimensional rounding in the converted simplified flat plate structure system in actual engineering, the present invention proposes collision mass compensation for the flat plate structure system based on dimensional analysis to obtain an equivalent simplified flat plate structure system.

[0038] Furthermore, the single web beam element and its size in step 1 include: Strip width b p , strip thickness h p , web height of web beam h w , web thickness of web beam t w , web beam top reinforcement width b f , thickness of the top reinforcement panel of the web beam t f .

[0039] Furthermore, the simplified flat plate structure system of step 2 is specifically that the geometric dimensions of a single unit plate of the simplified flat plate structure system are non-distorted geometry, including the plate length, width and plate thickness are all consistent, that is: The flat plate section is further designed according to the proposed simplified method as well as the web beam section itself.

[0040] Furthermore, the step 3 is specifically as follows: the fully plastic axial force of a single flat plate section of the flat plate structural system is consistent with that of a single web beam element:

[0041] Among them, the subscript W is the web beam, and F is the flat plate; The web thickness of a single flat plate section of a flat plate structural system is consistent with that of a single web beam element:

[0042] Among them, the fully plastic axial force N 0 by calculate, is the yield strength of the structural material, is the cross-sectional area of ​​a single unit.

[0043] The web height and web thickness of the cross-section of the flat plate structural system are adjusted to meet the above requirements; for the web beam structure at the bottom of the hull, the flat plate structural system obtained based on the above design method 1 is unique.

[0044] Furthermore, the step 4 is specifically as follows: the obstacle contact position:

[0045] in, Z is the obstacle contact position; Obstacle contact speed:

[0046] in, v 0 is the obstacle contact speed; Equivalent contact quality:

[0047] in, M I For considerable contact quality.

[0048] Furthermore, the step 5 specifically includes compensating the collision mass:

[0049] in, M S For structural quality, is the structural mass proportional factor.

[0050] The specific embodiments are: The present invention takes a hull bottom structure (including a typical web beam) as an example to illustrate the cross-section conversion design process of the present invention and gives the numerical simulation verification effect. In order to facilitate the explanation of the scaling process, the geometric parameters of the hull bottom structure are as follows: Figure 1 As shown in Table 1, the bottom plate is 640×340×1.3mm and contains seven typical web beams. The web height of the web beam is 60mm and the thickness is 1.15mm. The panel width is 15mm and the thickness is 1.5mm. Referring to the actual grounding obstacle scenario, the collision load of the hull bottom structure is applied by a hemispherical punch with a radius of 80mm. Other parameters include: obstacle contact speed of 3m / s, equivalent contact mass of 0.4t, contact position at the center of the plate frame, Z =320mm. The hull bottom structure is made of strain-rate-sensitive marine steel, and its detailed material parameters are shown in Table 1.

[0051] Table 1 Overall geometric parameters of the hull bottom structure

[0052] Table 2 Model material parameters in finite element analysis

[0053] According to the web beam cross-section equivalent simplification method proposed in the present invention, the corresponding flat plate structure is established. First, according to step 1, the single reinforcement unit and its geometric dimensions of the hull bottom structure are determined. The geometric parameters of the single reinforcement unit corresponding to the hull bottom structure are shown in Table 1 and Figure 4As shown, the strip is 80×340×1.3mm, the web height of the web beam is 60mm, the thickness is 1.15mm, the web beam panel width is 15mm, the thickness is 1.5mm, and the load and material parameters remain unchanged. The cross-sectional area is calculated to be 195.5mm 2 , the static moment of section is 3504.0mm 3 .

[0054] Table 3 Geometric parameters of a single reinforced unit of the hull bottom structure

[0055] Secondly, the simplified flat plate structure's materials and processing technology were determined to be consistent with the hull bottom structure, and the corresponding simplified flat plate structure distortion and undistorted geometry were established. According to step 2, the hull bottom structure's single reinforced unit plate geometry for the simplified flat plate structure is undistorted, including plate length, width, and thickness. That is, the plate is 80 × 340 × 1.3 mm. Other parameters of the simplified flat plate structure are further described.

[0056] According to the web beam cross-section equivalent simplification method proposed in this invention, the other geometric dimensions of the simplified flat plate structure are determined. According to step 3, the geometric dimensions of the simplified flat plate structure can be calculated: the web height is 79.57mm, the web thickness is 1.15mm, and the corresponding cross-sectional area is 195.5mm. 2 , the web thickness is equal to the hull bottom structure, which meets the requirements. Then the simplified flat plate structure single stiffening unit is as follows Figure 4 As shown. According to step 4, the collision position is Z F =320 (center of the frame), the collision speed should be 3m / s and the collision mass should be 0.4t.

[0057] Finally, according to step 5, the load parameters of the simplified plate structure do not need to be modified.

[0058] Table 4 shows the dimensional parameters, load parameters, and collision response of the simplified flat-plate structure using the proposed method. Numerical simulations were performed on both structures based on the design loads, and dynamic response results were obtained. Collision force and maximum deformation are important parameters for considering crashworthiness. Table 4 summarizes the corresponding maximum plastic deformation and maximum collision force results, along with a comparison with the hull bottom structure.

[0059] Table 4 Simplified flat plate structure system input parameters

[0060] Comparison results show that the simplified flat plate structure converted using the proposed method consistently exhibits consistent behavior and typical collision dynamic responses with its corresponding hull bottom structure. Numerical simulation results strongly demonstrate the effectiveness, applicability, and superiority of the proposed equivalent simplification method for double-bottom web beam sections with identical mechanical properties in a grounding scenario.

[0061] Implementation Method 2 An embodiment of the present invention provides a system for equivalent simplification of a double-bottom web beam cross section with the same mechanical properties in a grounding scenario. The system uses the method for equivalent simplification of a double-bottom web beam cross section with the same mechanical properties in a grounding scenario as described in Embodiment 1. The system includes: Parameter establishment module for a single web beam unit at the bottom of the hull: This module establishes the single web beam unit and its dimensions at the bottom of the hull based on the preset web beam structural unit. Establishment of non-distorted geometry and design of distorted geometry: Establishment of the non-distorted geometry and the distortion to be designed in the target simplified flat plate structural system; Geometric transformation criteria and geometric dimension establishment module: Based on the principle of consistent main structural dynamic behavior of the hull bottom structure in a grounding scenario, the geometric transformation criteria and geometric dimensions of a single flat plate section of a simplified flat plate structure system are established to achieve consistent structural dynamic asymptotic behavior in ship grounding scenarios; Obstacle Input Load Establishment Module: This module aims to achieve similar input collision energies between the double-layer low-web beam system and the simplified flat plate structure system, and preliminarily establishes the obstacle input loads for the geometrically designed flat plate structure system in a grounding scenario. Error compensation module: In order to compensate for the error caused by dimensional rounding of the converted simplified flat plate structure in actual engineering, the present invention proposes collision mass compensation for the above flat plate structure system based on dimensional analysis to obtain an equivalent target simplified flat plate structure system.

[0062] This system aims to achieve consistency in primary mechanical behavior and establishes a cross-sectional design method for the transition between web beams and simplified flat plate structures. This ensures that the primary mechanical behavior of the web beam, a key element of the hull bottom, is consistent under transverse collision loads. Furthermore, this equivalent simplified cross-sectional method for double-bottom web beams is adaptable to various test conditions and engineering material limitations. The resulting simplified flat plate collision system is capable of comprehensively reflecting the typical dynamic response of the original hull bottom structure.

[0063] Implementation Method 3 An embodiment of the present invention provides a simplified rapid prediction of the strength of the bottom structure of a ship in a grounding scenario using the method described in embodiment 1.

[0064] Implementation Method 4 An embodiment of the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. The memory is used to store software programs and modules, and the processor executes various functional applications and data processing by executing the software programs and modules stored in the memory. The memory and processor are connected via a bus. Specifically, the processor implements any step of the first embodiment described above by executing the computer program stored in the memory.

[0065] It should be understood that in the embodiments of the present invention, the processor referred to may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0066] The memory may include a read-only memory, a flash memory, and a random access memory, and provides instructions and data to the processor. A portion or all of the memory may also include a non-volatile random access memory.

[0067] It should be understood that if the above-mentioned integrated modules / units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the present invention can also implement all or part of the processes in the above-mentioned method embodiments by using a computer program to instruct the relevant hardware. The above-mentioned computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of each of the above-mentioned method embodiments. The above-mentioned computer program includes computer program code, which can be in source code form, object code form, executable file, or some intermediate form. The above-mentioned computer-readable medium can include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, USB flash drive, mobile hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium. It should be noted that the content contained in the above-mentioned computer-readable storage medium can be appropriately increased or decreased based on the requirements of legislation and patent practice in a jurisdiction.

[0068] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.

[0069] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the above-mentioned device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the implementation method can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method implementation method, and will not be repeated here.

[0070] It should be noted that the methods and detailed examples provided in the above embodiments can be combined with the devices and equipment provided in the embodiments, and references can be made to each other, and no further details will be given.

[0071] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0072] In the embodiments provided by the present invention, it should be understood that the disclosed apparatus / terminal equipment and methods can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For example, the division of the modules or units described above is merely a logical functional division. In actual implementation, other division methods may be used. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A method for equivalent simplification of double bottom web beam sections with the same mechanical properties in a stranding scenario, characterized by: The method comprises the following steps: Step 1: Based on the preset web beam structural element, determine the single web beam element and its size at the bottom of the hull; Step 2: Establish the target simplified non-distorted geometry of the plate structure system and the distortion to be designed; Step 3: Establish the geometric transformation criteria of a single flat plate section of the simplified flat plate structure system and the geometry after transformation; Step 4: With the goal of achieving similar input collision energies between the double-layer low-web beam system and the simplified flat plate structure system, preliminarily establish the obstacle input load for the flat plate structure system with the above geometric design in the grounding scenario; Step 5: In order to compensate for the error caused by the rounding of dimensions in the converted simplified flat plate structure system in actual engineering, collision mass compensation is proposed for the flat plate structure system based on dimensional analysis to obtain an equivalent simplified flat plate structure system.

2. The method according to claim 1, characterized in that The single web beam element and its size in step 1 include: Strip width b p , strip thickness h p , web height of web beam h w , web thickness of web beam t w , web beam top reinforcement width b f , thickness of the top reinforcement panel of the web beam t f .

3. The method according to claim 1, characterized in that Specifically, step 2 is to simplify the geometric dimensions of a single unit strip plate of the flat plate structure system to a non-distorted geometry, including the strip plate length, width and plate thickness are consistent with a single web beam unit, that is: , .

4. The method according to claim 1, characterized in that Specifically, the step 3 is that the fully plastic axial force of a single flat plate section of the flat plate structure system is consistent with that of a single web beam element: The web thickness of a single flat plate section of a flat plate structural system is consistent with that of a single web beam element: Among them, the fully plastic axial force N 0 by calculate, is the yield strength of the structural material, is the cross-sectional area of ​​a single unit.

5. The method according to claim 1, characterized in that: Specifically, step 4 includes: the obstacle contact position: in, Z is the obstacle contact position; Obstacle contact speed: in, v 0 is the obstacle contact speed; Equivalent contact quality: in, M I For considerable contact quality.

6. The method according to claim 5, characterized in that The step 5 specifically includes compensating the collision mass: in, M S For structural quality, is the structural mass proportional factor.

7. An equivalent simplified system of double bottom web beam sections with the same mechanical properties in a stranding scenario, characterized by: The system uses a double-bottom web beam cross-section equivalent simplification method with the same mechanical properties in a stranding scenario as described in any one of claims 1 to 6, and the system includes: Parameter establishment module for a single web beam unit at the bottom of the hull: This module establishes the single web beam unit and its dimensions at the bottom of the hull based on the preset web beam structural unit. Establishment of non-distorted geometry and design of distorted geometry: Establishment of the non-distorted geometry and the distortion to be designed in a simplified flat plate structural system; Geometric transformation criteria and geometric dimension establishment module: establish geometric transformation criteria and geometric dimensions of a single flat plate section in a simplified flat plate structure system; Obstacle Input Load Establishment Module: This module preliminarily establishes the obstacle input load for the flat plate structure system in the grounding scenario, with the goal of achieving similar input collision energy between the two collision systems. Error compensation module: In order to compensate for the error caused by size rounding in the converted simplified flat plate structure in actual engineering, collision mass compensation is proposed for the above flat plate structure system based on dimensional analysis to obtain an equivalent simplified flat plate structure system.

8. A method according to any one of claims 1 to 7, applied to the simplified rapid prediction of the strength of the ship bottom structure in a grounding scenario.

9. A computer device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

Images