Optimization method and device for minimum risk bomb position structure

Abstract

The present invention provides an optimization method and device for a minimum risk bomb location structure, including: in response to existing airworthiness clauses, a minimum risk bomb location structure is proposed as an airborne explosion-proof container, one end of the container is closed, and the other end is sealed by connecting a pressure relief cover and the container through a shear pin. When the mass of the explosive is small, the shear pin gives the container a certain containment capacity; when the mass of the explosive is large, the shear pin is sheared off, and the pressure relief cover flies out of the container to achieve directional pressure relief of the container. The present invention mainly performs finite element analysis on the proposed minimum risk bomb location structure, establishes a function proxy model, and optimizes the shape and size to finally obtain an optimized structural form; this method becomes an equal strength structure under the condition that the minimum risk bomb location structure meets the design requirements, and realizes the lightweight structure, reduces the operating costs of airlines, and improves its engineering application value.

Description

Technical Field

[0001] The invention relates to the field of aviation technology, and in particular to a method and a device for optimizing a minimum risk bomb position structure. Background Art

[0002] Currently, the Minimum Risk Bomb Location (LRBL) requirement is for airplanes with a maximum certified passenger capacity greater than 60 or a maximum certified takeoff gross weight greater than 100,000 pounds (45,359 kg). A location on the airplane where an explosive or incendiary device should be placed to minimize the impact on the airplane in the event of a deflagration.

[0003] For aircraft in flight, in addition to designating a minimum risk bomb location through design, when a suspected explosive device is found in the cabin, the suspected explosive device can also be placed in a pre-designed explosion containment device (minimum risk bomb location structure) according to the established disposal procedures. Once exploded, the bomb explosion can minimize the damage to critical flight structures, systems and personnel.

[0004] As a containment device for explosives on board, the minimum risk bomb location structure is usually made of high-strength alloys because the reliability of its structural strength is related to the safety of the entire civil aircraft cabin.

[0005] In the design of the minimum risk bomb position structure, the structural design of the ground explosion containment container is usually referred to, and its structural characteristics are high safety margin and large mass, etc. However, on civil aircraft, every additional 1g of weight will cause an additional economic burden to the airline, and this design method will greatly increase the cost. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide an optimization method and device for the minimum risk bomb position structure, which can not only meet the structural strength requirements but also make the structure lightweight, so that the minimum risk bomb position structure can achieve the optimal design and reduce costs.

[0007] In a first aspect, an embodiment of the present invention provides a method for optimizing a minimum risk bomb position structure, the method comprising:

[0008] Acquiring operating condition data of the minimum risk bomb location structure, the operating condition data including the location structure material of the minimum risk bomb, the explosive detonation location and the explosive target equivalent;

[0009] Input the explosive detonation position and the explosive target equivalent and use the ALE algorithm to establish a dynamic simulation model of the minimum risk bomb position structure with n different tank wall thicknesses;

[0010] The maximum structural stress corresponding to each tank wall thickness is calculated according to the dynamic simulation model;

[0011] The functional relationship between the tank wall thickness and the maximum stress of the structure corresponding to the minimum risk bomb position is established by using a polynomial response surface method for each tank wall thickness;

[0012] Determining the accuracy of the proxy model function according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship;

[0013] If the accuracy of the proxy model function meets the requirements, the minimum risk bomb position structure is cut into m structural segments along the radial direction, and a three-dimensional surface is constructed; if the accuracy of the proxy model function does not meet the requirements, consider increasing the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses;

[0014] According to the structural material of the minimum risk bomb position, the maximum stress allowed to be borne by the minimum risk bomb position is obtained;

[0015] Determine the thickness of each section of the structure according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface;

[0016] The thickness of each section of the structure is optimized to obtain an x-section stepped structure.

[0017] Furthermore, judging the accuracy of the proxy model function according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship includes:

[0018] Calculating the root mean square error according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship;

[0019] The accuracy of the proxy model function is determined according to the root mean square error.

[0020] Further, according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship, the root mean square error is calculated, including:

[0021] The root mean square error is calculated according to the following formula:

[0022]

[0023] Among them, RMSE is the root mean square error, n represents the minimum risk bomb position structure of n different tank wall thicknesses, f(x i ) is the maximum structural stress obtained by structural simulation calculation of the minimum risk bomb position of the i-th tank wall thickness, The maximum structural stress calculated by the structural fitting function of the minimum risk bomb position of the i-th tank wall thickness.

[0024] Furthermore, the minimum risk bomb position structure is cut into m structural segments along the radial direction, and a three-dimensional surface is constructed, including:

[0025] Establishing the relationship between the maximum structural stress of each structural segment and the thickness of the structure, thereby obtaining m polynomial functions;

[0026] The m polynomial functions are used to establish the three-dimensional surface reflecting the relationship between the thickness of the structure, the structural position of each of the structural segments and the maximum stress of the structure.

[0027] Further, the thickness of each section of the structure is determined according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface, including:

[0028] According to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface, the distribution law of the dynamic load under the implosion field is obtained;

[0029] The thickness of each section of the structure is determined according to the distribution law of the dynamic load under the implosion field.

[0030] Furthermore, the thickness of each section of the structure is optimized to obtain an x-section stepped structure, including:

[0031] Calculate the structure segments whose thickness difference between adjacent structure segments is less than the first value from the m structure segments, and count the number of structure segments to be y;

[0032] After the y structural segments are optimized to have equal thickness, the x-segment stepped structure is finally obtained, wherein x+y≥m.

[0033] In a second aspect, an embodiment of the present invention provides an optimization device for a minimum risk bomb position structure, the device comprising:

[0034] An acquisition module, used to acquire the working condition data of the minimum risk bomb position structure, wherein the working condition data includes the position structure material of the minimum risk bomb, the explosive detonation position and the explosive target equivalent;

[0035] A simulation model building module, for inputting the explosive detonation position and the explosive target equivalent and building a dynamic simulation model of the minimum risk bomb position structure of n different tank wall thicknesses through an ALE algorithm;

[0036] A structural maximum stress calculation module, used for calculating the structural maximum stress corresponding to each tank wall thickness according to the dynamic simulation model;

[0037] A function relationship establishment module, for establishing a function relationship between the tank wall thickness and the maximum stress of the structure corresponding to the minimum risk bomb position by using a polynomial response surface method for each tank wall thickness;

[0038] A judgment module, used for judging the accuracy of the proxy model function according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship;

[0039] A cutting module is used to cut the minimum risk bomb position structure into m structural segments along the radial direction and construct a three-dimensional surface when the accuracy of the proxy model function meets the requirements; if the accuracy of the proxy model function does not meet the requirements, consider increasing the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses;

[0040] An allowable maximum stress calculation module is used to obtain the maximum stress that the minimum risk bomb position is allowed to withstand according to the structural material of the minimum risk bomb position;

[0041] A determination module, used for determining the thickness of each section of the structure according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface;

[0042] The optimization module is used to optimize the thickness of each section of the structure to obtain an x-section stepped structure.

[0043] Furthermore, the judgment module is specifically used for:

[0044] Calculating the root mean square error according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship;

[0045] The accuracy of the proxy model function is determined according to the root mean square error.

[0046] In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor implements the method described above when executing the computer program.

[0047] In a fourth aspect, an embodiment of the present invention provides a computer-readable medium having a non-volatile program code executable by a processor, wherein the program code enables the processor to execute the method as described above.

[0048] The embodiment of the present invention provides an optimization method and device for a minimum risk bomb position structure, including: obtaining operating condition data of the minimum risk bomb position structure, the operating condition data including the minimum risk bomb position structure material, the explosive detonation position and the explosive target equivalent; inputting the explosive detonation position and the explosive target equivalent and establishing a dynamic simulation model of the minimum risk bomb position structure with n different tank wall thicknesses through an ALE algorithm; calculating the maximum structural stress corresponding to each tank wall thickness according to the dynamic simulation model; using a polynomial response surface method to establish a functional relationship between the tank wall thickness and the maximum stress of the corresponding minimum risk bomb position structure according to the maximum structural stress corresponding to each tank wall thickness; and according to the maximum structural stress corresponding to each tank wall thickness and the function The accuracy of the proxy model function is judged by the numerical relationship; if the accuracy of the proxy model function meets the requirements, the minimum risk bomb position structure is cut into m structural segments along the radial direction, and a three-dimensional surface is constructed; if the accuracy of the proxy model function does not meet the requirements, the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses is considered to be increased; the maximum stress allowed by the minimum risk bomb position is obtained according to the minimum risk bomb position structural material; the thickness of each structure segment is determined according to the maximum stress allowed by the minimum risk bomb position and the three-dimensional surface; the thickness of each structure segment is optimized to obtain an x-segment stepped structure; the structural strength requirements can be met while the structure can be lightweight, so that the minimum risk bomb position structure can achieve the optimal design and reduce the cost.

[0049] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A flow chart of a method for optimizing the minimum risk bomb position structure provided in the first embodiment of the present invention;

[0053] Figure 2A schematic diagram of a minimum risk bomb position structure segmentation process provided in the first embodiment of the present invention;

[0054] Figure 3 A schematic diagram of an optimization system for the minimum risk bomb position structure provided in the second embodiment of the present invention.

[0055] icon:

[0056] 1-acquisition module; 2-simulation model establishment module; 3-structural maximum stress calculation module; 4-function relationship establishment module; 5-judgment module; 6-interception module; 7-allowable maximum stress calculation module; 8-determination module; 9-optimization module. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] To facilitate understanding of this embodiment, the embodiment of the present invention is described in detail below.

[0059] Embodiment 1:

[0060] Figure 1 This is a flow chart of a method for optimizing the minimum risk bomb position structure provided in Example 1 of the present invention.

[0061] Reference Figure 1 , the method comprises the following steps:

[0062] Step S101, obtaining the working condition data of the minimum risk bomb position structure, the working condition data including the position structure material of the minimum risk bomb, the explosive detonation position and the explosive target equivalent; wherein the working condition data is used as the input condition of the dynamic simulation model;

[0063] Step S102, inputting the explosive detonation position and the explosive target equivalent and establishing a dynamic simulation model of the minimum risk bomb position structure of n different tank wall thicknesses through the ALE algorithm;

[0064] Here, Hypermesh software can also be used to discretize the minimum risk bomb position structure of n different tank wall thicknesses by finite element. Ls-dyna software and ALE algorithm are used to establish the structural dynamics simulation model of the minimum risk bomb position of n different tank wall thicknesses for target conditions such as explosive detonation position and explosive target equivalent.

[0065] The maximum structural stress at the minimum risk bomb position is obtained through simulation calculation, and the maximum structural stress appears near the explosion center annulus; the minimum risk bomb position structure of each tank wall thickness will have the maximum structural stress near the explosion center annulus. The maximum structural stress of each tank wall thickness is extracted for the subsequent establishment of a functional relationship with the tank wall thickness.

[0066] When changing the tank wall thickness in the minimum risk bomb position structural model, the inner diameter of the container must be kept constant to ensure that the load distribution in the implosion field remains basically unchanged.

[0067] Step S103, calculating the maximum structural stress corresponding to each tank wall thickness according to the dynamic simulation model;

[0068] Step S104, using the polynomial response surface method to establish a functional relationship between the tank wall thickness and the maximum stress of the structure at the minimum risk bomb position corresponding to each tank wall thickness;

[0069] Step S105, judging the accuracy of the proxy model function according to the maximum structural stress and the functional relationship corresponding to each tank wall thickness;

[0070] Step S106, if the accuracy of the proxy model function meets the requirements, the minimum risk bomb position structure is cut into m structural segments along the radial direction, and a three-dimensional surface is constructed; if the accuracy of the proxy model function does not meet the requirements, consider increasing the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses;

[0071] Step S107, obtaining the maximum stress allowed to be borne by the minimum risk bomb position according to the structural material of the minimum risk bomb position;

[0072] Step S108, determining the thickness of each section of the structure according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface;

[0073] Step S109, optimizing the thickness of each segment of the structure to obtain an x-segment stepped structure.

[0074] The main purpose of the present invention is to reduce the damage caused by explosives to personnel, equipment and fuselage structure in the aircraft cabin and to achieve lightweight structure in accordance with existing airworthiness clauses, and to propose an optimization method for the minimum risk bomb position structure.

[0075] Further, step S105 includes the following steps:

[0076] Step S201, calculating the root mean square error according to the maximum structural stress and the functional relationship corresponding to each tank wall thickness;

[0077] Step S202: determine the accuracy of the proxy model function according to the root mean square error.

[0078] Further, step S201 includes:

[0079] Calculate the root mean square error according to formula (1):

[0080]

[0081] Among them, RMSE is the root mean square error, n represents the minimum risk bomb position structure of n different tank wall thicknesses, f(x i ) is the maximum structural stress obtained by structural simulation calculation of the minimum risk bomb position of the i-th tank wall thickness, The maximum structural stress calculated by the structural fitting function of the minimum risk bomb position for the i-th tank wall thickness.

[0082] Specifically, the root mean square error characterizes the degree of deviation between the fitted surrogate model function and the original model of the research object, and represents the global approximation ability of the fitted surrogate model function to the original model of the research object. The root mean square error characterizes the quality of a fitting function through the change of data. The smaller the root mean square error, the higher the prediction accuracy of the fitting function; the larger the root mean square error, the lower the prediction accuracy of the fitting function. The higher the prediction accuracy of the surrogate model fitting function, the smaller the calculated root mean square error.

[0083] Further, step S106 includes the following steps:

[0084] Step S301, establishing a relationship between the maximum structural stress of each structural segment and the thickness of the structure, thereby obtaining m polynomial functions;

[0085] Here, the minimum risk bomb position structure is cut into m segments along the radial direction, such as Figure 2 According to the method of step S101 to step S105, the relationship between the maximum stress of each section of the structure and the thickness of the structure is established, thereby obtaining m polynomial functions.

[0086] Step S302: using m polynomial functions, establish a three-dimensional surface reflecting the relationship between the thickness of the structure, the structural position of each structural segment and the maximum stress of the structure.

[0087] Further, step S108 includes the following steps:

[0088] Step S401, obtaining the distribution law of dynamic load under the implosion field according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface;

[0089] Step S402, determining the thickness of each section of the structure according to the distribution law of the dynamic load under the implosion field.

[0090] Here, the distribution law of dynamic loads under the implosion field is identified, and the force distribution characteristics of the structure at the minimum risk bomb location are analyzed.

[0091] Further, step S108 includes the following steps:

[0092] Step S501, calculating the structure segments whose thickness difference between adjacent structure segments is less than a first value from the m structure segments, and counting the number of structure segments to be y;

[0093] Step S502, after optimizing y structural segments to have equal thickness, finally obtaining an x-segment stepped structure, wherein x+y≥m.

[0094] Specifically, in order to avoid the different thickness of each structure, which leads to the high difficulty of processing technology and poor practicality of the entire minimum risk bomb position structure, the structure segments with thickness differences between adjacent structure segments less than the first value are optimized into equal thickness segments, that is, the m structure segments are optimized into x-segment stepped structures, and finally the optimal design of the minimum risk bomb position structure is achieved.

[0095] Among them, the m structural segments are first optimized in sections to find the optimal thickness of each section; then each optimized structure is merged into a whole, and finally several circumferentially reinforced structure design forms are presented.

[0096] In response to existing airworthiness clauses, this application proposes a minimum risk bomb position structure as an airborne explosion-proof container. One end of the container is closed, and the other end is sealed by connecting a pressure relief cover and the container through a shear pin. When the mass of the explosive is small, the shear pin gives the container a certain containing capacity; when the mass of the explosive is large, the shear pin is sheared off, and the pressure relief cover flies out of the container, thereby realizing directional pressure relief of the container.

[0097] This application mainly conducts finite element analysis on the proposed minimum risk bomb position structure, establishes a function proxy model, and optimizes the shape and size to finally obtain an optimized structural form; this method becomes an equal strength structure under the condition that the minimum risk bomb position structure meets the design requirements, and realizes the lightweight of the structure, reduces the operating costs of airlines, and improves its engineering application value.

[0098] Embodiment 2:

[0099] Figure 3 A schematic diagram of an optimization system for the minimum risk bomb position structure provided in the second embodiment of the present invention.

[0100] Reference Figure 3 , the device comprises:

[0101] Acquisition module 1, used to acquire the working condition data of the minimum risk bomb position structure, the working condition data including the minimum risk bomb position structure material, explosive detonation position and explosive target equivalent;

[0102] The simulation model building module 2 is used to input the explosive detonation position and the explosive target equivalent and use the ALE algorithm to build a dynamic simulation model of the minimum risk bomb position structure of n different tank wall thicknesses;

[0103] The structural maximum stress calculation module 3 is used to calculate the structural maximum stress corresponding to each tank wall thickness according to the dynamic simulation model;

[0104] Functional relationship establishment module 4, used for establishing the functional relationship between the tank wall thickness and the maximum stress of the structure corresponding to the minimum risk bomb position by using a polynomial response surface method for each tank wall thickness;

[0105] A judgment module 5 is used to judge the accuracy of the proxy model function according to the maximum structural stress and the functional relationship corresponding to each tank wall thickness;

[0106] The interception module 6 is used to cut the minimum risk bomb position structure into m structural segments along the radial direction and construct a three-dimensional surface when the accuracy of the proxy model function meets the requirements; if the accuracy of the proxy model function does not meet the requirements, consider increasing the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses;

[0107] The allowable maximum stress calculation module 7 is used to obtain the maximum stress allowed to be borne by the minimum risk bomb position according to the structural material of the minimum risk bomb position;

[0108] A determination module 8 is used to determine the thickness of each section of the structure according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional surface;

[0109] The optimization module 9 is used to optimize the thickness of each section of the structure to obtain an x-section stepped structure.

[0110] Furthermore, the judgment module 5 is specifically used for:

[0111] According to the maximum structural stress and functional relationship corresponding to each tank wall thickness, the root mean square error is calculated;

[0112] The accuracy of the surrogate model function is judged based on the root mean square error.

[0113] The embodiment of the present invention provides an optimization method and device for a minimum risk bomb position structure, including: obtaining operating condition data of the minimum risk bomb position structure, the operating condition data including the minimum risk bomb position structure material, the explosive detonation position and the explosive target equivalent; inputting the explosive detonation position and the explosive target equivalent and establishing a dynamic simulation model of the minimum risk bomb position structure with n different tank wall thicknesses through an ALE algorithm; calculating the maximum structural stress corresponding to each tank wall thickness according to the dynamic simulation model; using a polynomial response surface method to establish a functional relationship between the tank wall thickness and the maximum stress of the corresponding minimum risk bomb position structure according to the maximum structural stress corresponding to each tank wall thickness; and according to the maximum structural stress corresponding to each tank wall thickness and the function The accuracy of the proxy model function is judged by the numerical relationship; if the accuracy of the proxy model function meets the requirements, the minimum risk bomb position structure is cut into m structural segments along the radial direction, and a three-dimensional surface is constructed; if the accuracy of the proxy model function does not meet the requirements, the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses is considered to be increased; the maximum stress allowed by the minimum risk bomb position is obtained according to the minimum risk bomb position structural material; the thickness of each structure segment is determined according to the maximum stress allowed by the minimum risk bomb position and the three-dimensional surface; the thickness of each structure segment is optimized to obtain an x-segment stepped structure; the structural strength requirements can be met while the structure can be lightweight, so that the minimum risk bomb position structure can achieve the optimal design and reduce the cost.

[0114] An embodiment of the present invention also provides an electronic device, including 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 steps of the method for optimizing the minimum risk bomb position structure provided in the above embodiment are implemented.

[0115] An embodiment of the present invention also provides a computer-readable medium having a non-volatile program code executable by a processor, wherein a computer program is stored on the computer-readable medium, and when the computer program is executed by the processor, the steps of the method for optimizing the minimum risk bomb position structure of the above embodiment are executed.

[0116] The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the previous method embodiment. The specific implementation can be found in the method embodiment and will not be repeated here.

[0117] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0118] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0119] If the functions are implemented in the form of 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 technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0120] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0121] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for optimizing the minimum risk bomb position structure, characterized in that: The method comprises: Acquiring operating condition data of the minimum risk bomb location structure, the operating condition data including the location structure material of the minimum risk bomb, the explosive detonation location and the explosive target equivalent; Input the explosive detonation position and the explosive target equivalent and establish a dynamic simulation model of the minimum risk bomb position structure of n different tank wall thicknesses through the ALE algorithm; The maximum structural stress corresponding to each tank wall thickness is calculated according to the dynamic simulation model; The functional relationship between the tank wall thickness and the maximum stress of the structure corresponding to the minimum risk bomb position is established by using a polynomial response surface method for each tank wall thickness; Determining the accuracy of the proxy model function according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship; If the accuracy of the proxy model function meets the requirements, the minimum risk bomb position structure is cut into m structural segments along the radial direction, and a three-dimensional surface is constructed; if the accuracy of the proxy model function does not meet the requirements, consider increasing the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses; According to the structural material of the minimum risk bomb position, the maximum stress allowed to be borne by the minimum risk bomb position is obtained; Determine the thickness of each section of the structure according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface; The thickness of each section of the structure is optimized to obtain an x-section stepped structure.

2. The method for optimizing the minimum risk bomb position structure according to claim 1, characterized in that: The accuracy of the proxy model function is determined according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship, including: Calculating the root mean square error according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship; The accuracy of the proxy model function is determined according to the root mean square error.

3. The method for optimizing the minimum risk bomb position structure according to claim 2, characterized in that: According to the maximum structural stress corresponding to each tank wall thickness and the functional relationship, the root mean square error is calculated, including: The root mean square error is calculated according to the following formula: Among them, RMSE is the root mean square error, n represents the minimum risk bomb position structure of n different tank wall thicknesses, f(x i ) is the maximum structural stress obtained by structural simulation calculation of the minimum risk bomb position of the i-th tank wall thickness, The maximum structural stress calculated by the structural fitting function of the minimum risk bomb position of the i-th tank wall thickness.

4. The method for optimizing the minimum risk bomb position structure according to claim 1, characterized in that: The minimum risk bomb position structure is cut into m structure segments along the radial direction, and a three-dimensional surface is constructed, including: Establishing the relationship between the maximum structural stress of each structural segment and the thickness of the structure, thereby obtaining m polynomial functions; The m polynomial functions are used to establish the three-dimensional surface reflecting the relationship between the thickness of the structure, the structural position of each of the structural segments and the maximum stress of the structure.

5. The method for optimizing the minimum risk bomb position structure according to claim 1, characterized in that: According to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface, the thickness of each section of the structure is determined, including: According to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface, the distribution law of the dynamic load under the implosion field is obtained; The thickness of each section of the structure is determined according to the distribution law of the dynamic load under the implosion field.

6. The method for optimizing the minimum risk bomb position structure according to claim 1, characterized in that: The thickness of each section of the structure is optimized to obtain an x-section stepped structure, including: Calculate the structure segments whose thickness difference between adjacent structure segments is less than the first value from the m structure segments, and count the number of structure segments to be y; After the y structural segments are optimized to have equal thickness, the x-segment stepped structure is finally obtained, wherein x+y≥m.

7. An optimization device for the minimum risk bomb position structure, characterized in that: The device comprises: An acquisition module, used to acquire the working condition data of the minimum risk bomb position structure, wherein the working condition data includes the position structure material of the minimum risk bomb, the explosive detonation position and the explosive target equivalent; A simulation model building module, for inputting the explosive detonation position and the explosive target equivalent and using an ALE algorithm to build a dynamic simulation model of the minimum risk bomb position structure for n different tank wall thicknesses; A structural maximum stress calculation module, used for calculating the structural maximum stress corresponding to each tank wall thickness according to the dynamic simulation model; A function relationship establishment module, for establishing a function relationship between the tank wall thickness and the maximum stress of the structure corresponding to the minimum risk bomb position by using a polynomial response surface method for each tank wall thickness; A judgment module, used for judging the accuracy of the proxy model function according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship; A cutting module is used to cut the minimum risk bomb position structure into m structural segments along the radial direction and construct a three-dimensional surface when the accuracy of the proxy model function meets the requirements; if the accuracy of the proxy model function does not meet the requirements, consider increasing the number of dynamic simulation models of the minimum risk bomb position structure with different tank wall thicknesses; An allowable maximum stress calculation module is used to obtain the maximum stress that the minimum risk bomb position is allowed to withstand according to the structural material of the minimum risk bomb position; A determination module, used for determining the thickness of each section of the structure according to the maximum stress allowed to be borne by the minimum risk bomb position and the three-dimensional curved surface; The optimization module is used to optimize the thickness of each section of the structure to obtain an x-section stepped structure.

8. The device for optimizing the minimum risk bomb position structure according to claim 7, characterized in that: The judgment module is specifically used for: Calculating the root mean square error according to the maximum structural stress corresponding to each tank wall thickness and the functional relationship; The accuracy of the proxy model function is determined according to the root mean square error.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run 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 medium having a non-volatile program code executable by a processor, characterized in that: The program code enables the processor to execute the method according to any one of claims 1 to 6.

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