Full-sea-depth implosion-impact-resistant light pressure-resistant structure and construction method thereof

Abstract

The invention provides a full-sea-depth implosion-impact-resistant light pressure-resistant structure and a construction method thereof, and the construction method comprises the following steps: step 1, determining the minimum wall thickness of a pressure-resistant layer according to an application environment; 2, the wall thickness S1 of the pressure-resistant layer and the wall thickness S2 of the protective layer serve as design variables, and reduction of the total mass M and the near-end pressure peak P serve as optimization objectives to conduct optimization design; 3, constructing a corresponding orthogonal test combination, performing simulation calculation by adopting finite element software, generating an orthogonal test table, and outputting an optimal design variable; and 4, verifying an optimization result. According to the method, the limit range of design variables is obtained through the maximum working sea depth, the wall thickness of a pressure-resistant layer and the wall thickness of a protective layer serve as the design variables, the mass and the near-end pressure peak serve as optimization targets, and optimization and verification are conducted in combination with a simulation result; excellent wall thicknesses and proportions of the pressure-resistant layer and the protective layer can be given, and the precision is high; the method is simple and clear, the protection effect is remarkable, and the multiple effects of feasibility, safety and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep - sea submersibles, and specifically, to a lightweight pressure - resistant structure for all - depth anti - implosion impact and a construction method thereof. Background Art

[0002] The pressure - resistant structure is one of the main structures of deep - sea submersibles. It is not only an important guarantee for the normal operation of various classification system devices inside the cabin, but also provides buoyancy reserve for the carrier while reducing the structural weight.

[0003] When designing an all - depth pressure - resistant structure, lightweight design is often pursued to improve the overall performance. The working environment of high pressure in the deep sea requires the evaluation of the pressure - resistant performance of the overall structure. At the same time, due to the huge pressure difference between the inside and outside of the structure in the deep sea, there is a risk of implosion. During the implosion process, the hydrostatic pressure of the flow field is converted into fluid kinetic energy. When the airflow compresses the internal air cavity to the smallest, the internal air will rebound outward, generating a shock wave far greater than the ambient pressure, resulting in catastrophic consequences. Therefore, the potential risk of implosion also highlights the necessity of the protective layer design to reduce the catastrophic consequences brought by implosion.

[0004] Combined with the requirements for pressure resistance and anti - implosion impact performance of deep - sea pressure - resistant structures, the structure can be divided into a pressure - resistant layer and a protective layer during the design process. However, how to determine the wall - thickness ratio of the pressure - resistant layer and the protective layer is a factor that must be considered during the design process. Since submersibles at different working depths of the sea need to bear different ambient pressures, which correspond to different pressure - resistant thicknesses. The thicker the pressure - resistant layer and the protective layer, the better the protection effect, but this will inevitably lead to an increase in the total weight. How to balance the relationship between these two design variables in actual design is a difficult point to be overcome in previous solutions.

[0005] At the same time, in previous design schemes, various working conditions are often set to compare the weight reduction and protection effect between different working conditions. Through calculation, it can be found that appropriately increasing the proportion of the protective layer can improve the protection effect while reducing the weight, obtaining a better design scheme. However, how to deal with different working depths of the sea and determine the wall thickness and proportion of the pressure - resistant layer and the protective layer is still a problem to be solved. And the existing structure optimization experiments have deficiencies such as a large number of times, low optimization efficiency, and poor applicability. An efficient optimization method for an all - depth anti - implosion impact lightweight pressure - resistant structure is urgently needed to be proposed.

[0006] There is a Chinese patent application document with the publication number CN117465640A, which discloses a lightweight composite spherical pressure-resistant structure and a deep-sea submersible for deep-sea implosion protection, including a hollow ceramic ball lining and a CFRP outer layer, and the two cooperate to form a ceramic-CFRP composite spherical pressure-resistant structure. However, this patent only proposes the concept of such a structure, does not provide the optimal thickness and proportion of the lining and the outer layer in this structure, and does not propose an optimization design method for this structure.

[0007] The existing solutions have the following defects: The thickness and proportion of the pressure-resistant layer and the protection layer simultaneously affect the overall weight and protection effect of the structure, and it is difficult to balance the relationship between these two design variables in actual design. In previous design solutions, calculations and comparisons were often carried out by setting different working conditions, but the applicability to multiple working conditions at full ocean depth is poor, and the conclusions obtained are mostly regularities, making it difficult to determine the specific wall thickness and proportion. The existing structure optimization experiments have deficiencies such as a large number of times and low optimization efficiency, and there is no optimization method for the lightweight pressure-resistant structure against implosion shock at full ocean depth.

[0008] Therefore, it is necessary to propose a new technical solution to improve the above technical problems. It is necessary to propose a construction method for a lightweight pressure-resistant structure against implosion shock at full ocean depth. Based on meeting the requirements of the full ocean depth working environment, taking the wall thickness of the pressure-resistant layer and the wall thickness of the protection layer as design variables, and taking the mass and the proximal pressure peak value as optimization objectives, combined with the simulation results for optimization and verification, an efficient and accurate structural performance evaluation and design scheme is formed. This method has important engineering reference value for the design and application of deep-sea pressure-resistant structures. Summary of the Invention

[0009] Aiming at the defects in the prior art, the purpose of the present invention is to provide a lightweight pressure-resistant structure against implosion shock at full ocean depth and its construction method.

[0010] According to a construction method for a lightweight pressure-resistant structure against implosion shock at full ocean depth provided by the present invention, it includes the following steps:

[0011] Step 1, determine the minimum wall thickness of the pressure-resistant layer according to the application environment;

[0012] Step 2, take the wall thickness S1 of the pressure-resistant layer and the wall thickness S2 of the protection layer as design variables, and carry out optimization design with the goal of reducing the total mass M and the proximal pressure peak value P;

[0013] Step 3, construct the corresponding orthogonal test combination, use finite element software for simulation calculation, generate an orthogonal test table, train the orthogonal test table to obtain a prediction result, and then use the predicted result for optimization evaluation to output the optimal design variables;

[0014] Step 4, verify the optimization result.

[0015] Preferably, the protective layer and the pressure-resistant layer are both hollow spherical, and the protective layer is coated on the outer surface of the pressure-resistant layer and the two are completely in contact with each other.

[0016] Preferably, the mass of the pressure-resistant layer is M1, the mass of the protective layer is M2, the total mass of the structure is M, M=M1+M2, the density of the pressure-resistant layer is ρ1, the volume is V1, and the inner diameter is r, the density of the protective layer is ρ2, and the volume is V2;

[0017] but:

[0018]

[0019] Preferably, in step 1, the maximum operating sea depth is determined by the application environment, and the minimum wall thickness of the pressure-resistant layer can be determined according to the operating sea depth;

[0020] The actual operating water depth is h, the seawater density is ρ, the acceleration of gravity is g, and the maximum working pressure is P water for:

[0021] P water =ρgh;

[0022] The static pressure of air inside the pressure-resistant layer is P air , the wall thickness S1 of the pressure-resistant layer satisfies:

[0023]

[0024] Where D1 is the inner diameter of the pressure-resistant layer ball structure, [σ t ] is the allowable stress, is the weld coefficient, c is the design margin;

[0025] Allowable stress [σ t The calculation formula of ] is:

[0026] [σ t ]=σ b / n;

[0027] Among them, σ b is the strength limit of the material itself, and n is the safety factor.

[0028] Preferably, in step 2, the distance between the proximal monitoring point and the center of the sphere is d, R is the radius of the sphere, and the range of d is R to 2R.

[0029] Preferably, in step 3, when establishing the orthogonal array, the values of S1 and S2 are changed according to the range of the design variables selected in step 2;

[0030] Among them, the relationship between P and the design variables is as follows: when the total wall thickness increases, P will decrease; when the total wall thickness is constant, the changes in S1 and S2 will affect the value of P. The calculation results of P under different S1 and S2 ratios are obtained through finite element software simulation.

[0031] Preferably, in step 3, the process of constructing the orthogonal table is as follows: First, select columns in the orthogonal table and determine the value ranges of different test levels according to the actual situation. Then, select different level combinations of each factor, perform simulation calculations, and record the calculation results to form an orthogonal test table. Input the data of the orthogonal test table into the neural network for training to obtain the prediction results, and then use the predicted results for optimization evaluation to output the optimal design variables.

[0032] Preferably, in step 3, based on the finite element fluid-structure interaction simulation results M s , P s , training and prediction are carried out to output the optimal design variables S 1best , S 2best , and the optimized results M best , P best are obtained.

[0033] Preferably, in step 4, the optimization results are evaluated through the quality error rate a and the proximal pressure peak error rate b of the simulation. The calculation formulas are as follows:

[0034]

[0035] According to an all-ocean-depth anti-implosion shock lightweight pressure-resistant structure provided by the present invention, it is manufactured by the above-mentioned construction method for the all-ocean-depth anti-implosion shock lightweight pressure-resistant structure.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The present invention obtains the limited range of design variables through the maximum working ocean depth, uses the wall thickness of the pressure-resistant layer and the wall thickness of the protective layer as design variables, and uses the mass and the proximal pressure peak as optimization objectives, and combines the simulation results for optimization and verification. Through verification and comparison, it can be seen that the optimization design method proposed in this application can give relatively optimal wall thicknesses and ratios of the pressure-resistant layer and the protective layer for the all-ocean-depth anti-implosion shock lightweight pressure-resistant structure, and achieves a relatively high accuracy. The method is simple, the protective effect is remarkable, and multiple effects such as feasibility and safety are achieved.

[0038] 2. By adopting the orthogonal experimental design method, the present invention effectively overcomes the deficiencies of the current structural optimization, such as a large number of experimental times, low optimization efficiency, and poor applicability. While providing a guiding direction for the optimization design of the all-depth anti-implosion shock lightweight pressure-resistant structure, it greatly improves the optimization efficiency. By comparing with the finite element calculation results, the accuracy of this method is verified, and the optimized structure shows outstanding performance in terms of lightweight and anti-shock. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0040] Figure 1 It is a schematic framework diagram mainly reflecting the idea of the construction method for the all-depth anti-implosion shock lightweight pressure-resistant structure of the present invention;

[0041] Figure 2 It is a schematic diagram of the optimization object and design variables of the spherical structure under 52 MPa mainly reflecting the present invention;

[0042] Figure 3 It is a schematic diagram of the optimal spherical design structure under 52 MPa mainly reflecting the present invention.

[0043] As shown in the figure:

[0044] Pressure-resistant layer 1, protective layer 2 DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0046] Embodiment 1

[0047] As Figure 1 shown, according to a construction method for an all-depth anti-implosion shock lightweight pressure-resistant structure provided by the present invention, it includes the following steps:

[0048] Step 1, according to the application environment, determine the minimum wall thickness of the pressure-resistant layer 1;

[0049] Step 2, taking the wall thickness S1 of the pressure-resistant layer 1 and the wall thickness S2 of the protective layer 2 as design variables, and taking reducing the total mass M and the proximal pressure peak P as the optimization objectives for optimization design;

[0050] Step 3: Construct corresponding orthogonal test combinations, perform simulation calculations using finite element software, generate an orthogonal test table, train the orthogonal test table to obtain prediction results, and then use the predicted results for optimization evaluation to output the optimal design variables.

[0051] Step 4: Verify the optimization results.

[0052] This application provides a construction method for a full-depth anti-internal explosion shock lightweight pressure-resistant structure, aiming to solve the problems that traditional methods are difficult to achieve the design of pressure-resistant structures suitable for multi-condition full-depth applications, as well as the problems of a large number of current structure optimization experiments, low optimization efficiency, and poor applicability.

[0053] Both the protective layer 2 and the pressure-resistant layer 1 are in the shape of a hollow sphere, and the protective layer 2 covers the outer surface of the pressure-resistant layer 1 and they are completely fitted.

[0054] The mass of the pressure-resistant layer 1 is M1, the mass of the protective layer 2 is M2, the total mass of the structure is M, M = M1 + M2, the density of the pressure-resistant layer 1 is ρ1, the volume is V1, the inner diameter is r, the density of the protective layer 2 is ρ2, and the volume is V2;

[0055] Then:

[0056]

[0057] In Step 1, the application environment determines the maximum working depth of the sea, and the minimum wall thickness of the pressure-resistant layer 1 can be determined according to the working depth of the sea.

[0058] The actual operating water depth is h, the density of seawater is ρ, the acceleration due to gravity is g, and the maximum working pressure is P water is:

[0059] P water = ρgh;

[0060] The air static pressure inside the pressure-resistant layer 1 is P air , and the wall thickness S1 of the pressure-resistant layer 1 satisfies:

[0061]

[0062] where D1 is the inner diameter of the spherical structure of the pressure-resistant layer, [σ t is the allowable stress, is the weld coefficient, and c is the design margin;

[0063] The calculation formula for the allowable stress [σ t [[ID = 51]]] is:

[0064] [σ t = σ b / n;

[0065] where σ bis the strength limit of the material itself, and n is the safety factor.

[0066] In step 2, the length of the proximal monitoring point from the center of the sphere is d, R is the radius of the sphere, and the range of d is from R to 2R. Among them, the selection of the optimized design variable range needs to consider safety, light weight, and actual engineering requirements. Safety includes pressure resistance and protection effect. For the hollow spherical structure, the requirements for pressure resistance were discussed in step 1. The protection effect is mainly evaluated according to P. The smaller P is, the better the protection effect. Light weight is mainly evaluated according to M. The smaller M is, the better the protection effect. The actual engineering requirements are mainly determined in combination with the production manufacturer and the actual use purpose. Generally speaking, for the improvement of the overall performance, the total wall thickness (S1 + S2) should not be too thick. Thus, the wall thickness S1 of the pressure-resistant layer 1 and the wall thickness S2 of the protection layer 2 of the design variables can be determined.

[0067] In step 3, when establishing the orthogonal table, according to the range of the design variables selected in step 2, different values of S1 and S2 are changed; among them, the relationship between P and the design variables is: when the total wall thickness increases, P will decrease, and when the total wall thickness is constant, the changes of S1 and S2 will affect the value of P; the calculation results of P under different S1 and S2 ratios are obtained through finite element software simulation.

[0068] In the previous design schemes, calculations and comparisons were often carried out by setting working conditions with different S1 and S2, but the applicability to multiple working conditions of the full ocean depth was poor, and the obtained conclusions were mostly regular, making it difficult to determine the specific wall thickness and ratio. This application can obtain better prediction results through the training of the orthogonal test table, and then use the predicted results for optimization evaluation, and finally output the optimal design variables.

[0069] In step 3, the process of constructing the orthogonal table is as follows: First, select columns in the orthogonal table and determine the value range of different test levels according to the actual situation; then, select different level combinations of each factor, conduct simulation calculations, and record the calculation results to form an orthogonal test table. Input the data of the orthogonal test table into the neural network for training to obtain the prediction results, and then use the predicted results for optimization evaluation to output the optimal design variables. This application constructs corresponding orthogonal test combinations for the optimization objective and design variables to generate an orthogonal test table; under the given maximum working ocean depth condition, the optimization variables of the full ocean depth anti-internal explosion shock lightweight pressure-resistant structure affect each other, and the constructed orthogonal test combination is an orthogonal test with interaction.

[0070] In step 3, based on the finite element fluid-structure coupling simulation results M s 、P s , training and prediction are carried out, and the optimal design variables S 1best 、S 2best are output, and the optimization results M best 、P best are obtained.

[0071] In step 4, it is evaluated through the quality error rate a between the optimization result and the simulation, and the proximal pressure peak error rate b. The calculation formulas are as follows:

[0072]

[0073] The smaller the quality error rate a and the proximal pressure peak error rate b, the higher the optimization accuracy.

[0074] The present application is further elaborated by taking the following data as an example.

[0075] The wall thickness S1 of the pressure-resistant layer should be selected according to the actual operating water depth. The actual operating water depth h of the deep-sea submersible; in this embodiment, the operating water depth is selected as 5000 m, then the maximum working pressure P that the structure needs to bear under the operating water depth condition water is:

[0076] P water = ρgh = 52 MPa;

[0077] The air static pressure P inside the pressure-resistant layer air takes a standard atmospheric pressure, which is:

[0078] P air = 0.1013 MPa;

[0079] The wall thickness formula of the pressure-resistant layer is:

[0080] S1 ≥ P water D1 / (4*[σ t *φ - P air )+c;

[0081] Among them, D1 is the inner diameter of the spherical structure of the pressure-resistant layer, [σt] is the allowable stress, φ is the weld coefficient, which is taken as 1 in the ideal case without welding, and c is the design margin;

[0082] The calculation formula of the allowable stress [σ t is:

[0083] [σ t = σ b / n;

[0084] Among them, σ b is the strength limit of the material itself, and n is the safety factor.

[0085] It is necessary to determine the design variables and the optimization objectives. The wall thickness S1 of the pressure-resistant layer and the wall thickness S2 of the protective layer are selected as the design variables of the full-depth anti-internal explosion impact lightweight pressure-resistant structure. The optimization objective is to minimize the total mass M and the proximal pressure peak P as much as possible, so as to achieve better lightweight and protection effects.

[0086] In this embodiment, the material of the pressure-resistant layer is selected as ceramics with an inner diameter of 92 mm; the material of the protective layer is selected as carbon fiber reinforced composite material. Considering the safety requirements in actual engineering, the wall thickness range of the pressure-resistant layer in this embodiment is finally determined as 0.6 mm ≤ S1 ≤ 1 mm. At the same time, considering that the total wall thickness should not be too thick, the wall thickness range of the protective layer is determined as 0.6 mm ≤ S2 ≤ 1 mm. Thus, the range of design variables is determined. The optimization object and the range of design variables in this embodiment are as follows Figure 2 .

[0087] An orthogonal test combination is constructed for the optimization goal and design variables to generate an orthogonal test table; under the given maximum working sea depth condition, the optimization variables of the full-depth anti-internal explosion shock lightweight pressure-resistant structure interact with each other, and the constructed orthogonal test combination is an orthogonal test with interaction

[0088] When conducting the orthogonal design test in this embodiment, the level values of each design variable in the orthogonal table are taken as 0.6 mm, 0.8 mm, and 1 mm, and according to the orthogonal design results, finite element software is used for simulation calculation to obtain the following orthogonal table

[0089]

[0090]

[0091] Based on the finite element fluid-structure interaction simulation results M s , P s , training and prediction are carried out to output the optimal design variables S 1best , S 2best , and the obtained optimization results M best , P best are verified

[0092] The accuracy of the optimization results can be evaluated by the quality error rate a between the optimization results and the simulation, and the proximal pressure peak error rate b. The calculation formulas are as follows

[0093]

[0094] The smaller the quality error rate a and the proximal pressure peak error rate b, the higher the optimization accuracy. Substituting into this embodiment, the results are: a = 1.2%, b = 1.5%, meeting the requirements. The optimal structure of this embodiment is output, as shown in Figure 3 .

[0095] The method for constructing a full-depth anti-internal explosion shock lightweight pressure-resistant structure provided by this application fills the blank of the optimization method for a full-depth anti-internal explosion shock lightweight pressure-resistant structure. For the full-depth working environment, the design of the structure can be flexibly adjusted without being limited to a specific working condition

[0096] In this application, the limited range of design variables is obtained through the maximum working ocean depth. With the wall thickness of the pressure-resistant layer and the wall thickness of the protective layer as the design variables, and the mass and the peak proximal pressure as the optimization objectives, optimization and verification are carried out in combination with the simulation results. It can be known from the verification and comparison that the optimization design method proposed in this application can give relatively optimal wall thicknesses and proportions of the pressure-resistant layer and the protective layer for the all-depth anti-internal explosion shock lightweight pressure-resistant structure, and achieve a relatively high accuracy. The method of this application is concise, with a significant protective effect, achieving multiple effects such as feasibility and safety.

[0097] By adopting the orthogonal experimental design method, this application effectively overcomes the deficiencies of the current structure optimization, such as a large number of experimental times, low optimization efficiency, and poor applicability. While providing a guiding direction for the optimization design of the all-depth anti-internal explosion shock lightweight pressure-resistant structure, it greatly improves the optimization efficiency. By comparing with the finite element calculation results, the accuracy of this method is verified, and the optimized structure is outstanding in terms of lightweight and anti-impact. This application provides a new solution for the design of all-depth pressure-resistant structures, laying a foundation for the actual application to submersibles, and has important significance for the design and application of pressure-resistant structures.

[0098] Example 2

[0099] Based on Example 1, an all-depth anti-internal explosion shock lightweight pressure-resistant structure provided by the present invention is manufactured by the manufacturing method of the all-depth anti-internal explosion shock lightweight pressure-resistant structure in Example 1.

[0100] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0101] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of this application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A construction method for a full-depth anti-implosion shock lightweight pressure-resistant structure, characterized in that, It includes the following steps: Step 1: Determine the minimum wall thickness of the pressure-resistant layer (1) according to the application environment. Step 2: Take the wall thickness S1 of the pressure-resistant layer (1) and the wall thickness S2 of the protective layer (2) as design variables, and conduct an optimization design with the goal of reducing the total mass M and the proximal pressure peak P. Step 3: Construct the corresponding orthogonal test combinations, use finite element software for simulation calculation, generate an orthogonal test table, train the orthogonal test table to obtain a prediction result, and then use the predicted result for optimization evaluation to output the optimal design variables. Step 4: Verify the optimization result.

2. The method for constructing a full-depth anti-implosion shock lightweight pressure-resistant structure according to claim 1, characterized in that, Both the protective layer (2) and the pressure-resistant layer (1) are in the shape of a hollow sphere, and the protective layer (2) covers the outer surface of the pressure-resistant layer (1) and they are completely fitted.

3. The method for constructing a full-depth anti-implosion impact lightweight pressure-resistant structure according to claim 2, wherein, The mass of the pressure-resistant layer (1) is M1, the mass of the protective layer (2) is M2, the total mass of the structure is M, M = M1 + M2, the density of the pressure-resistant layer (1) is ρ1, the volume is V1, the inner diameter is r, and the density of the protective layer (2) is ρ2, the volume is V2; Then:

4. The method for constructing a full-depth anti-implosion shock lightweight pressure-resistant structure according to claim 3, characterized in that, In Step 1, the application environment determines the maximum working sea depth, and the minimum wall thickness of the pressure-resistant layer (1) can be determined according to the working sea depth. The actual operating water depth is h, the seawater density is ρ, the acceleration of gravity is g, and the maximum working pressure is P water is as follows: P water = ρgh; The static air pressure inside the pressure-resistant layer (1) is P air , and the wall thickness S1 of the pressure-resistant layer (1) satisfies: Among them, D1 is the inner diameter of the pressure-resistant layer spherical structure, [[σ t is the allowable stress, is the weld coefficient, and c is the design margin; The allowable stress [σ t is calculated by the formula: [σ t = σ b / n; Among them, σ b is the ultimate strength of the material itself, and n is the safety factor.

5. The method for constructing a full-depth anti-implosion shock lightweight pressure-resistant structure according to claim 1, characterized in that In Step 2, the length of the proximal monitoring point from the center of the sphere is d, R is the radius of the sphere, and the range of d is from R to 2R.

6. The method for constructing a full-depth anti-implosion shock lightweight pressure-resistant structure according to claim 3, characterized in that, In Step 3, when establishing the orthogonal table, according to the range of the design variables selected in Step 2, change the values of different S1 and S2; Among them, the relationship between P and the design variables is: when the total wall thickness increases, P will decrease. When the total wall thickness is constant, the changes of S1 and S2 will affect the value of P; the calculation results of P under different S1 and S2 ratios are obtained through finite element software simulation.

7. The method for constructing a full-depth anti-implosion shock lightweight pressure-resistant structure according to claim 6, characterized in that, In Step 3, the process of constructing the orthogonal table is as follows: First, select columns in the orthogonal table and determine the value range of different test levels according to the actual situation; then, select different level combinations of each factor, conduct simulation calculations, and record the calculation results to form an orthogonal test table. Input the data of the orthogonal test table into a neural network for training to obtain a prediction result, and then use the predicted result for optimization evaluation to output the optimal design variables.

8. The method for constructing a full-depth anti-implosion impact lightweight pressure-resistant structure according to claim 7, wherein In step 3, based on the finite element fluid-structure interaction simulation results M s , P s , training and prediction are carried out, and the optimal design variables S 1best , S 2best are output, and the optimization results M best , P best are obtained.

9. The method for constructing a full-depth anti-implosion shock lightweight pressure-resistant structure according to claim 8, wherein In Step 4, the optimization result is evaluated through the quality error rate a and the proximal pressure peak error rate b of the simulation. The calculation formulas are respectively:

10. A kind of all - ocean - depth anti - implosion shock lightweight pressure - resistant structure, characterized in that, It is manufactured by the method for constructing a lightweight pressure-resistant structure against implosion shock at full sea depth according to any one of claims 1-9.

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