Rapid analysis method for critical buckling load of pressure-resistant shell of deep-sea energy storage and supply system

Abstract

The invention relates to a rapid analysis method for critical buckling load of a pressure-resistant shell of a deep-sea energy storage and supply system, and the method comprises the steps: setting the initial wall thickness t and unsupported length L of the pressure-resistant shell, determining the used material of the pressure-resistant shell, and checking the related parameters of the pressure-resistant shell; calculating an expected elastic instability pressure Fhe based on the initial wall thickness t, the unsupported length L and related parameters of the pressure-resistant shell; calculating an expected inelastic instability pressure Fic based on the expected elastic instability pressure Fhe; and determining a design coefficient FS based on the expected inelastic buckling pressure Fic, and solving the critical buckling pressure Pa. The method is high in calculation accuracy and high in efficiency, can be used for design calculation of a pressure-resistant shell of a deep sea energy storage and supply system and a pressure-resistant cylindrical shell under similar working conditions, and greatly reduces the time required for analysis and design of similar products.

Description

Technical Field

[0001] The present invention relates to a method for rapidly analyzing the critical buckling load of a pressure-resistant shell of a deep-sea energy storage and supply system, and belongs to the technical field of deep-sea energy storage and supply. Background Art

[0002] The deep-sea energy storage and supply system provides stable energy supply for the long-term operation of a large number of deep-sea unmanned equipment. The shell structure is a widely used structural form in the deep-sea energy storage and supply system and ship structures. Such structures mainly bear axial compression or radial compression, and buckling is their main failure form. Buckling refers to the loss of stability of the structure, so buckling is also called instability. Generally speaking, it is easier for the shell to buckle than to suffer structural damage. Therefore, the main design idea of the shell is that its critical buckling instability pressure meets the design requirements.

[0003] At present, the design calculation of the pressure-resistant shell of the deep-sea energy storage and supply system mostly adopts the method of finite element trial calculation or preliminary estimation by combining theory with finite element. Its calculation efficiency is low, and the initial thickness estimation depends on the engineering experience of the user. The repeated trial calculation process is too cumbersome, resulting in a long time-consuming for the buckling analysis of the existing deep-sea energy storage and supply system shell. It is difficult to quickly determine its buckling load, so the layout and design of the deep-sea energy storage and supply system cannot be further carried out. Moreover, the existing calculation methods are mainly for thin-walled shells or shells under axial pressure, and cannot be applied to the buckling analysis of the pressure-resistant shell of the deep-sea energy storage and supply system with large wall thickness. Summary of the Invention

[0004] In view of the above technical problems, the present invention provides a method for rapidly analyzing the critical buckling load of a pressure-resistant shell of a deep-sea energy storage and supply system. This method can quickly determine the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system through theoretical calculation, without the need to repeatedly calculate by means of a complicated finite element method, and does not need to rely on the engineering experience of the user to estimate the wall thickness. The calculation accuracy is high and the efficiency is high. It can be used for the design calculation of the pressure-resistant shell of the deep-sea energy storage and supply system and the pressure-resistant cylindrical shell under similar working conditions, greatly reducing the time required for the analysis and design of similar products.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for rapidly analyzing the critical buckling load of a pressure-resistant shell of a deep-sea energy storage and supply system, comprising:

[0007] Set the initial wall thickness t and the unsupported length L of the pressure-resistant shell, determine the material used for the pressure-resistant shell, and look up the relevant parameters of the pressure-resistant shell;

[0008] Based on the initial wall thickness t, the unsupported length L, and the relevant parameters of the pressure-resistant shell, calculate the expected elastic instability pressure F he ;

[0009] Based on the expected elastic instability pressure F he , calculate the expected inelastic instability pressure F ic ;

[0010] Based on the expected inelastic instability pressure F ic , determine the design coefficient FS and obtain the critical buckling pressure P a .

[0011] For the rapid analysis method of the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system, preferably, the relevant parameters of the pressure-resistant shell include strength, elastic modulus, and tensile strength.

[0012] For the rapid analysis method of the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system, preferably, the expected elastic instability pressure F he The calculation formula is as follows:

[0013]

[0014] In the formula, E y is the shell parameter; C h is the elastic instability pressure calculation coefficient; D0 is the inner diameter of the shell.

[0015] For the rapid analysis method of the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system, preferably, the value of the expected inelastic instability pressure F ic needs to be solved by iteration, and the following relationship is satisfied during the iteration process:

[0016]

[0017] In the formula, E is the elastic modulus of the material; A e is the elastic buckling proportionality coefficient.

[0018] For the rapid analysis method of the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system, preferably, the calculation formula of the design coefficient FS is as follows:

[0019] FS = 2, F ic ≤ Sy

[0020]

[0021] FS = 1.667, F ic = Sy

[0022] In the formula, Sy is the yield strength of the material at the design temperature.

[0023] The rapid analysis method for the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system, preferably, the critical buckling pressure P a has the following calculation formula:

[0024]

[0025] In the formula, F ha = F ic / FS.

[0026] The second aspect of the present invention provides a rapid analysis device for the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system, including:

[0027] The first processing unit is used to set the initial wall thickness t and the unsupported length L of the pressure-resistant shell, determine the material used for the pressure-resistant shell, and obtain the relevant parameters of the pressure-resistant shell;

[0028] The second processing unit is used to calculate the expected elastic instability pressure F he ;

[0029] The third processing unit is used to calculate the expected inelastic instability pressure F he based on the expected elastic instability pressure F ic ;

[0030] The fourth processing unit is used to determine the design coefficient FS based on the expected inelastic instability pressure F ic and obtain the critical buckling pressure P a ;

[0031] The third aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the rapid analysis method for the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system described in any one of the above are realized.

[0032] The fourth aspect of the present invention provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the rapid analysis method for the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system described in any one of the above are realized.

[0033] Due to the adoption of the above technical solutions, the present invention has the following advantages:

[0034] 1. The method proposed in the present invention for a deep - sea pressure - resistant cylindrical shell made of isotropic steel materials can be used to quickly calculate the critical buckling pressure and design external pressure of the pressure - resistant shell, avoiding complex finite - element numerical simulation calculations in actual engineering, greatly improving the design efficiency, reducing the design cost, and ensuring the reliability of the design at the same time.

[0035] 2. According to the size and layout of the built - in equipment in the present invention, the unsupported length outside and the inner diameter are initially determined; secondly, a suitable material is selected according to requirements; an initial wall thickness t is set, and combined with the above - mentioned parameters, the wall thickness that meets the requirements and the critical buckling pressure at this time are calculated through theoretical methods.

[0036] 3. The present invention can well ensure the stability of the pressure - resistant shell of the deep - sea energy storage and supply system, quickly and accurately obtain the critical buckling pressure of the pressure - resistant shell, and can quickly complete the design of the pressure - resistant shell in combination with requirements such as the designed water depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a flowchart of a method for quickly analyzing the critical buckling load of a pressure - resistant shell of a deep - sea energy storage and supply system provided by an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the parameters of the pressure - resistant shell provided by this embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of the modeling of the pressure - resistant shell provided by this embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the boundary conditions of the pressure - resistant shell provided by this embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the load conditions of the pressure - resistant shell provided by this embodiment of the present invention;

[0042] Figure 6 It is the finite - element buckling calculation result (29 - mm wall thickness) provided by this embodiment of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0044] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The terms "first", "second", "third", "fourth" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0045] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure to another element or feature. Such relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "above", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation other than the orientations depicted in the figure.

[0046] One of the prior arts provides a modified calculation method for the critical buckling load of a thin-walled cylindrical shell under axial compression. By introducing the influence parameters of the elastic-plastic behavior of the cylindrical shell material and the parameters characterizing the cylindrical shell structure, the correction coefficients in the above two aspects are given. Finally, the calculated value can be obtained by multiplying with the classical formula for the critical buckling load of an axially compressed cylindrical shell. However, it has the following problems: Disadvantage 1: It is not applicable to the pressure-resistant shell mainly under external pressure. The main stress modes of a thin-walled cylindrical shell are axial force and radial force. For the pressure-resistant structure of a deep-sea nuclear power energy storage and replenishment system, it is more mainly subjected to the radial pressure from seawater. Its calculation method based on the traditional critical buckling load of an axially compressed cylindrical shell cannot calculate this working condition well. Disadvantage 2: It is only applicable to thin-walled cylindrical shells and not applicable to pressure-resistant shells with larger wall thicknesses. This invention is only applicable to thin-walled cylindrical shells (the shell diameter-thickness ratio R / t should satisfy: 50 ≤ R / t ≤ 1000), not applicable to pressure-resistant shells with larger wall thicknesses. The wall thicknesses of the shell examples given in this invention are 1 mm and 1.5 mm respectively, while the wall thickness of the pressure-resistant shell of a deep-sea energy storage and replenishment system is generally greater than 10 mm. Therefore, the calculation method in the prior art 1 is not applicable to the pressure-resistant shell of a deep-sea energy storage and replenishment system with a large wall thickness.

[0047] Prior art 2 provides an external pressure buckling analysis method for a variable stiffness composite cylindrical shell based on isogeometry. The linear external pressure buckling load of the cylindrical shell is solved, and the nonlinear external pressure buckling load of the structure under a single-point perturbation load is solved based on the arc length method. By analyzing the relationship between the structural buckling load and the single-point perturbation load value, the lower limit of the critical buckling load is found as the buckling load prediction value, and finally the external pressure buckling load prediction of the cylindrical shell based on the single-point perturbation load is realized. The inventive method can well perform external pressure buckling analysis on a variable stiffness composite cylindrical shell, but it is still necessary to establish a cylindrical shell mesh model, and then construct a stiffness matrix, a geometric stiffness matrix and a load stiffness matrix based on the first-order shear deformation theory under large deformation conditions to solve the linear external pressure buckling load of the cylindrical shell. However, this method needs to deal with complex mathematical operations such as the ply angle and the construction of the stiffness matrix, and still needs to be calculated with the help of the finite element method, and the calculation efficiency of the buckling analysis is low. At the same time, the mechanical properties of composite materials are dispersed, and the mechanical properties of composite cylindrical shells obtained by direct modeling have certain deviations from the actual ones. For pressure-resistant cylindrical shells with steel structures, the inventive method is not applicable.

[0048] The third prior art discloses a method for calculating the stability of a metal cylindrical shell. Through finite element modeling and static analysis methods, the allowable axial stress and allowable hoop stress are obtained through calculation formulas, and then the allowable axial stress and allowable hoop stress of the metal cylindrical shell are verified to achieve the purpose of calculating the stability of the metal cylindrical shell. This technology requires presetting the initial thickness of the metal cylindrical shell, establishing a finite element model of the metal cylindrical shell according to the initial thickness and the actual load distribution of the metal cylindrical shell, dividing the finite element model into finite element grids, and using static analysis to calculate the stress of each grid unit. When the calculation results are not satisfactory, the wall thickness is readjusted and the finite element calculation is performed again. The initial thickness estimation of the cylindrical shell depends on the user's engineering experience, and the calculation process is too cumbersome, and the stability of the metal cylindrical shell cannot be quickly calculated and analyzed.

[0049] In view of the shortcomings of the existing shell buckling technology, the present invention proposes a rapid analysis method for the critical buckling load of the pressure shell of the deep-sea energy storage and supply system. This method can quickly determine the critical buckling load of the pressure shell of the deep-sea energy storage and supply system through theoretical calculation, without the need for repeated trial calculations using complicated finite element methods, and does not need to rely on the user's engineering experience to estimate the wall thickness. The calculation has high accuracy and efficiency, and can be used for the design and calculation of the pressure shell of the deep-sea energy storage and supply system and the pressure cylindrical shell under similar working conditions, greatly reducing the time required for analysis and design of similar products.

[0050] like Figure 1 , Figure 2 As shown, the method for rapid analysis of critical buckling load of the pressure hull of the deep-sea energy storage and replenishment system involved in the present invention has the following specific process:

[0051] Set the initial wall thickness t and the unsupported length L, determine the material used, and look up the relevant parameters, including strength, elastic modulus, etc. Then calculate the critical buckling pressure through the analytical method. The calculation process is as follows:

[0052] 1. Calculate the expected elastic instability pressure F he , and the specific calculation formula is as follows:

[0053]

[0054] M x ≤1.5, C h = 1.0

[0055] In the formula, F he is the elastic axial compression membrane failure stress of the cylinder when only under external pressure; M x is the shell parameter; C h is the elastic instability pressure calculation coefficient; t is the wall thickness of the cylindrical shell; L is the unsupported length; D0 is the inner diameter of the shell; E y is the shell parameter; R0 is the inner radius of the shell.

[0056] 2. Calculate the expected inelastic instability pressure F ic The value of needs to be solved by iteration, and the following relationship is satisfied during the iteration process:

[0057]

[0058] In the formula, A e is the elastic buckling proportionality coefficient; E is the elastic modulus of the material.

[0059] Determine the shear modulus E t of the material, and the value of the expected inelastic buckling prestress needs to be solved by the iterative method.

[0060] The algorithm here aims to obtain the inelastic instability pressure based on the relationship between the expected elastic buckling pressure and the properties of the material. In the formula, E is the elastic modulus of the material, E t is the shear modulus of the material, and the calculation method of E t is as follows:

[0061]

[0062]

[0063] K = 1.5R 1.5 - 0.5R 2.5 - R 3.5 .

[0064] In the formula, A1 is the curve fitting constant in the elastic region of the stress-strain curve; A2 is the curve fitting constant in the plastic region of the stress-strain curve; D1, D2, D3, D4 are the coefficients used in the tangent modulus; ε p is the stress-strain curve fitting parameter; ε t is the total true strain; ε ys is the 0.2% engineering offset strain; ε1 is the true plastic strain in the micro-strain region of the stress-strain curve; ε2 is the true plastic strain in the macro-strain region of the stress-strain curve; E t is the elastic tangent modulus measured at a specified temperature; E y is the elastic modulus measured at a specified temperature; γ1 is the true strain in the micro-strain region of the stress-strain curve; γ2 is the true strain in the macro-strain region of the stress-strain curve; H is the stress-strain curve fitting parameter; K is the material parameter of the stress-strain curve model; m1, m2 are the curve fitting exponents of the stress-strain curve; σ t is the true stress; σ ys is the engineering yield stress evaluated at the considered temperature; σ uts is the engineering ultimate tensile stress evaluated at the reference temperature; R is the engineering yield ratio and engineering tensile ratio.

[0065] 3. Determine the design coefficient FS, and its calculation process is as follows:

[0066] FS = 2, F ic ≤Sy

[0067]

[0068] FS = 1.667, F ic = Sy

[0069] In the formula, Sy is the yield strength of the material at the design temperature.

[0070] 4. Finally, calculate the critical buckling pressure P a of the pressure hull under the current design according to the above values, and the specific relationship is as follows:

[0071]

[0072] The technical solution of the present invention will be described in detail below in combination with specific application examples

[0073] In this example, the unsupported length L is 1950 mm, the inner radius D is 600 mm, and the selected material is TC4 titanium alloy. Its material parameters are as follows: the elastic modulus of the material is 110 GPa, the minimum yield strength at the material design temperature is 795 MPa, the tensile strength is 1000 MPa, and it needs to meet the high pressure of 20.1 MPa in the 2000 m deep sea. A safety factor of 1.5 is given, and the calculated value needs to be greater than or equal to 30.15 MPa.

[0074] The rapid calculation method of the present invention is completed using Matlab. When the above parameters are input, when the wall thickness t = 80 mm, the critical buckling pressure Pa reaches 31 MPa, meeting the design requirements.

[0075] To verify the accuracy of this rapid calculation method, the finite element (slower) method is used for verification. The finite element modeling process is as follows ( Figures 3 - 5 ):

[0076] Use ABAQUS for modeling and finite element calculation.

[0077] 1. Component: Establish a rotating shell model, specifically as Figure 3 shown.

[0078] 2. Material properties: Set the parameters to be the same as those in the theoretical calculation.

[0079] 3. Section properties: Solid, and the shell offset is selected to be offset from the bottom.

[0080] 4. Assembly: This model has only one independent component, and it can be directly assembled.

[0081] 5. Analysis step: Select the buckling analysis step and modify the keyword.

[0082] 6. Boundary conditions: Select the three-point fixation method, specifically as Figure 4 shown.

[0083] 7. Load conditions: Uniform external pressure, with a value of 1 MPa, as Figure 5 shown.

[0084] 8. Mesh division: Select an appropriate number of meshes.

[0085] Assigning the wall thickness T = 80 mm to the finite element model, the critical buckling pressure under the safety factor can be obtained as 29.80 MPa (as Figure 6 shown), and the error value is 3.87%.

[0086] To further verify the accuracy of the fast calculation method of the present invention, five groups of different parameters of the pressure hull of the deep-sea energy storage and replenishment system are taken, and calculated by the fast calculation method of the present invention. The results are compared with the cumbersome finite element method, and the finite element values can all judge that it has high accuracy.

[0087] Table 1 Comparison between the fast calculation method of the present invention and the finite element method

[0088]

[0089]

[0090] According to the size and layout of the built-in equipment, the present invention preliminarily determines the unsupported length and inner diameter outside it, and quickly calculates the wall thickness that meets the requirements and the critical buckling pressure at this time through theoretical methods, which is applicable to the fast calculation of elastic critical buckling stress, inelastic critical buckling stress and tangential modulus.

[0091] The second aspect of the present invention provides a device for quickly analyzing the critical buckling load of the pressure hull of a deep-sea energy storage and replenishment system, including:

[0092] The first processing unit is used to set the initial wall thickness t and unsupported length L of the pressure hull, determine the material used for the pressure hull, and obtain the relevant parameters of the pressure hull;

[0093] The second processing unit is used to calculate the expected elastic buckling pressure F based on the initial wall thickness t, unsupported length L and relevant parameters of the pressure hull he ;

[0094] The third processing unit is used to calculate the expected inelastic buckling pressure F based on the expected elastic buckling pressure F he ; ic ;

[0095] The fourth processing unit is used to determine the design coefficient FS based on the expected inelastic buckling pressure F ic and obtain the critical buckling pressure P a .

[0096] The third aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for quickly analyzing the critical buckling load of the pressure hull of the deep-sea energy storage and replenishment system described in any one of the above are realized.

[0097] In a fourth aspect of the present invention, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the method for quickly analyzing the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system described in any one of the above are implemented.

[0098] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products in specific embodiments. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0099] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implements the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0100] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 block or multiple blocks.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rapid analysis method for the critical buckling load of the pressure-resistant shell of a deep-sea energy storage and supply system, characterized in that, Including: Set the initial wall thickness t and unsupported length L of the pressure-resistant shell, determine the material used for the pressure-resistant shell, and obtain the relevant parameters of the pressure-resistant shell; Based on the initial wall thickness t, the unsupported length L, and the relevant parameters of the pressure-resistant shell, calculate the expected elastic buckling pressure F he ; Based on the expected elastic buckling pressure F he , calculate the expected inelastic buckling pressure F ic ; Based on the expected inelastic buckling pressure F ic , determine the design factor FS and obtain the critical buckling pressure P a .

2. The rapid analysis method for the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system according to claim 1, characterized in that, The relevant parameters of the pressure-resistant shell include strength, elastic modulus, and tensile strength.

3. The rapid analysis method for the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and replenishment system according to claim 1, wherein Expected elastic buckling pressure F he The calculation formula is as follows: where E y is the shell parameter; C h is the elastic buckling pressure calculation coefficient; D0 is the inner diameter of the shell.

4. The rapid analysis method for the critical buckling load of the pressure-resistant housing of the deep-sea energy storage and replenishment system according to claim 1, characterized in that, The expected inelastic buckling pressure F ic The value of which needs to be solved by iteration, and the following relationship is satisfied during the iteration process: where E is the elastic modulus of the material; A e is the elastic buckling proportionality coefficient.

5. The rapid analysis method for the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system according to claim 1, characterized in that The calculation formula for the design factor FS is as follows: FS = 2, F ic ≤ Sy FS = 1.667, F ic = Sy In the formula, Sy is the yield strength of the material at the design temperature.

6. The rapid analysis method for the critical buckling load of the pressure-resistant housing of the deep-sea energy storage and supply system according to claim 1, characterized in that, Critical buckling pressure P a The calculation formula is as follows: where F ha = F ic / FS.

7. A device for quickly analyzing the critical buckling load of a pressure-resistant housing of a deep-sea energy storage and replenishment system, characterized in that, Including: The first processing unit is used to set the initial wall thickness t and unsupported length L of the pressure-resistant shell, determine the material used for the pressure-resistant shell, and obtain the relevant parameters of the pressure-resistant shell; A second processing unit, configured to calculate an expected elastic buckling pressure F based on an initial wall thickness t, an unsupported length L, and relevant parameters of the pressure-resistant housing he ; A third processing unit, configured to calculate an expected inelastic buckling pressure F based on an expected elastic buckling pressure F he ic ;​ A fourth processing unit for determining a design coefficient FS and obtaining a critical buckling pressure P based on an expected inelastic buckling pressure F ic , a .

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for quickly analyzing the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system according to any one of claims 1-6.

9. A computer device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for quickly analyzing the critical buckling load of the pressure-resistant shell of the deep-sea energy storage and supply system according to any one of claims 1-6.

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