Loading intensity design method for variable-temperature component and related product

Abstract

The present application discloses a loading intensity design method for a variable-temperature component and a related product, which can be applied to the technical field of superconducting magnets. The method comprises: acquiring a temperature-dependent material yield strength function of a variable-temperature component; using finite element software to perform temperature field analysis and stress field analysis on the variable-temperature component to obtain the temperature and the von Mises stress of each grid node of the variable-temperature component; on the basis of the material yield strength function, substituting the temperature and the von Mises stress of each grid node into a loading intensity function for analysis to obtain an analysis result; and on the basis of the analysis result, optimizing the variable-temperature component to implement structural design of the variable-temperature component. In this way, temperature field analysis and stress field analysis are performed on the variable-temperature component, and on the basis of the material yield strength function, the loading intensity function is used for analysis, so as to optimize the structure of the variable-temperature component, so that the variable-temperature component has an optimal structural size, thereby improving the lightweight level which reducing heat leakage.

Description

A loading strength design method for variable temperature components and related products

[0001] The present invention claims priority to Chinese patent application No. 202310823455.2, filed with the State Intellectual Property Office of the People's Republic of China on July 6, 2023, entitled “A method for designing loading strength of variable temperature components and related products,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of superconducting magnets, and in particular to a method for designing the loading strength of a temperature-varying component and related products. Background Art

[0003] Superconducting magnets are the key core subsystem of electric levitation trains, mainly composed of superconducting magnetic poles and cryostats. The design of the on-board superconducting magnet cryostats is different from the cryostats used in traditional static applications. They require stronger load-bearing capacity, lower conduction heat leakage power, and better lightweight design.

[0004] Existing design methods cannot simultaneously take into account the load-bearing capacity, conductive heat leakage power and lightweight design. In order to ensure the load-bearing capacity and conductive heat leakage power of the cryostat, the lightweight design of the cryostat is often ignored, resulting in the problem of the designed cryostat being too heavy.

[0005] Therefore, how to improve the lightweight level of the cryostat while reducing heat leakage is an urgent problem that technicians in this field need to solve.

[0006] Summary of the Invention

[0007] Based on the above problems, the present application provides a loading strength design method and related products for variable temperature components. By analyzing the temperature field and stress field of the variable temperature components, combining the material yield strength function, and using the loading strength function for analysis, the structure of the variable temperature components is optimized, so that the variable temperature components can achieve the optimal structural size, thereby solving the problem that the existing technology cannot simultaneously take into account the load-bearing capacity, conduction heat leakage power and lightweight design.

[0008] In a first aspect, the present application provides a method for designing the loading strength of a temperature-variable component, comprising:

[0009] Obtain the temperature-dependent material yield strength function of the variable temperature component;

[0010] Performing temperature field analysis and stress field analysis on the temperature-variable component using finite element software to obtain the temperature and Mises stress of each grid node of the temperature-variable component;

[0011] In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading strength function for analysis to obtain analysis results;

[0012] The temperature-changing component is optimized according to the analysis results to realize the structural design of the temperature-changing component.

[0013] Optionally, before performing temperature field analysis and stress field analysis on the temperature-variable component using finite element software to obtain the temperature and Mises stress of each grid node of the temperature-variable component, the method further includes:

[0014] Simplifying the temperature-changing component to obtain a simplified geometric model of the temperature-changing component;

[0015] A finite element model of the temperature-changing component is obtained according to the simplified geometric modeling model.

[0016] Optionally, the simplifying the temperature-changing component to obtain a simplified geometric model of the temperature-changing component includes:

[0017] Obtaining a three-dimensional structural model of the temperature-changing component;

[0018] Using modeling software to split the three-dimensional structural model, remove target features of each split structural component, and obtain a simplified geometric model of the temperature-variable component;

[0019] The target features include: bolt holes.

[0020] Optionally, obtaining a finite element model of the temperature-variable component according to the simplified geometric modeling model includes:

[0021] Importing the simplified geometric model into finite element software;

[0022] Inputting the material parameters of each split structural component into finite element software to obtain a finite element model of the temperature-changing component;

[0023] The various split structural components are discretized in the form of grid units, and the grid units are connected using common nodes.

[0024] Optionally, the step of performing temperature field analysis and stress field analysis on the temperature-variable component using finite element software to obtain the temperature and Mises stress of each grid node of the temperature-variable component includes:

[0025] In combination with the actual operating conditions of the temperature-changing component, parameters are set for each grid node of the temperature-changing component in finite element software;

[0026] In combination with the parameter settings, temperature field analysis and stress field analysis are performed on the temperature-variable component to determine the temperature and Mises stress of each grid node.

[0027] Optionally, combining the material yield strength function, substituting the temperature and Mises stress of each grid node into a loading strength function for analysis to obtain analysis results, including:

[0028] In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading intensity function for analysis to obtain an analysis result of whether the loading intensity meets or does not meet the first preset threshold;

[0029] The first preset threshold ranges from greater than or equal to 0.8 to less than or equal to 1.

[0030] Optionally, optimizing the temperature-changing component according to the analysis results to implement the structural design of the temperature-changing component includes:

[0031] Determining specific loading intensities of grid nodes that do not meet a first preset threshold;

[0032] When the loading strength of the grid node is less than 0.8, the grid node is thinned along the direction of heat conduction;

[0033] When the loading intensity of the grid unit is greater than 1, the grid nodes are thickened along the direction of the force line.

[0034] In a second aspect, the present application provides a device for designing the loading strength of a temperature-variable component, comprising:

[0035] An acquisition module is used to obtain a temperature-dependent material yield strength function of a temperature-variable component;

[0036] A first analysis module is used to perform temperature field analysis and stress field analysis on the temperature-variable component using finite element software to obtain the temperature and Mises stress of each grid node of the temperature-variable component;

[0037] A second analysis module is configured to combine the material yield strength function and substitute the temperature and Mises stress of each grid node into the loading strength function for analysis to obtain an analysis result;

[0038] The optimization module is used to optimize the temperature-changing component according to the analysis results to realize the structural design of the temperature-changing component.

[0039] In a third aspect, the present application provides a device for designing the loading strength of a temperature-variable component, characterized by comprising:

[0040] Memory for storing computer programs;

[0041] A processor is used to implement the steps of the loading strength design method for a temperature-varying component as described in any of the above items when executing the computer program.

[0042] In a fourth aspect, the present application provides a readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method for designing the loading strength of a temperature-varying component as described in any one of the above items are implemented.

[0043] It can be seen from the above technical solutions that compared with the existing technology, this application has the following advantages:

[0044] This application first obtains the temperature-dependent material yield strength function of the variable temperature component, and uses finite element software to perform temperature field analysis and stress field analysis on the variable temperature component to obtain the temperature and Mises stress of each grid node of the variable temperature component. Then, in combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading intensity function for analysis to obtain the analysis results. Finally, the variable temperature component is optimized based on the analysis results to achieve the structural design of the variable temperature component. Thus, the temperature field and stress field analysis of the variable temperature component is performed, and the loading intensity function is used for analysis in combination with the material yield strength function, and then the structure of the variable temperature component is optimized so that the variable temperature component achieves the optimal structural size, thereby improving the lightweight level while ensuring the reduction of heat leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a flow chart of a method for designing the loading strength of a temperature-variable component provided by the present application;

[0046] FIG2 is a schematic structural diagram of a device for designing the loading strength of a temperature-variable component provided in this application. DETAILED DESCRIPTION

[0047] As previously mentioned, existing design methods fail to simultaneously address load-bearing capacity, conductive heat leakage, and lightweight design. Specifically, existing design methods for temperature-variable components fail to consider the favorable conditions for changes in material mechanical properties at low temperatures. To ensure the cryostat's load-bearing capacity and conductive heat leakage, lightweight design is often overlooked, resulting in overweight cryostats.

[0048] To address the aforementioned issues, the present application provides a method for designing the loading strength of a variable temperature component. The method comprises the following steps: first, obtaining a temperature-dependent material yield strength function for the variable temperature component, and performing temperature and stress field analysis on the variable temperature component using finite element software to obtain the temperature and Mises stress of each grid node of the variable temperature component. Then, combining the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading strength function for analysis to obtain analysis results. Finally, based on the analysis results, the variable temperature component is optimized to achieve the structural design of the variable temperature component.

[0049] In this way, the temperature field and stress field of the variable temperature component are analyzed, combined with the material yield strength function and the loading strength function for analysis, and then the structure of the variable temperature component is optimized so that the variable temperature component can achieve the optimal structural size, thereby improving the lightweight level while ensuring the reduction of heat leakage.

[0050] It should be noted that the method for designing the loading strength of a variable temperature component and related products provided in this application can be applied to the field of superconducting magnet technology. The above is only an example and does not limit the application field of the method for designing the loading strength of a variable temperature component and related products provided in this application.

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] FIG1 is a flow chart of a method for designing the loading strength of a temperature-variable component provided by the present application. In conjunction with FIG1 , the method for designing the loading strength of a temperature-variable component provided by the present application may include:

[0053] S101: Obtaining a temperature-dependent material yield strength function of a temperature-variable component.

[0054] In practical applications, superconducting magnets are the key core subsystems of electric levitation trains. They are mainly composed of superconducting magnetic poles and cryogenic thermostats. Some components in the cryogenic thermostat structure are between the low-temperature environment and the external normal temperature environment. They are called variable temperature components. These components bear all the dynamic and static loads in the internal low-temperature zone. At the same time, due to its heat flow conduction function, it continuously affects the internal low-temperature zone. Combined with the constituent materials of the variable temperature components, through the low-temperature performance test of the materials, the strength curve of the material changing with temperature is obtained, that is, the material yield strength function related to the temperature of the variable temperature components is obtained, which is recorded as σ s (T).

[0055] S102: Using finite element software to perform temperature field analysis and stress field analysis on the temperature-variable component to obtain the temperature and Mises stress of each grid node of the temperature-variable component.

[0056] In practical applications, finite element software can be used as the primary analysis software. Specifically, the analysis model for the temperature-variable component, designed as a load-bearing component, is input into the finite element software. The design domain and the parameters of each mesh node are defined, and temperature and stress field analyses are performed to obtain the temperature and Mises stress at each mesh node of the temperature-variable component.

[0057] In addition, since the methods of obtaining the temperature and Mises stress of each grid node of the temperature-variable component are different, this application can explain the possible methods of obtaining them.

[0058] In one embodiment, the temperature and Mises stress of each grid node are obtained. Accordingly, S102: using finite element software to perform temperature field analysis and stress field analysis on the temperature-variable component to obtain the temperature and Mises stress of each grid node of the temperature-variable component includes:

[0059] In combination with the actual operating conditions of the temperature-changing component, parameters are set for each grid node of the temperature-changing component in finite element software;

[0060] In combination with the parameter settings, temperature field analysis and stress field analysis are performed on the temperature-variable component to determine the temperature and Mises stress of each grid node.

[0061] In practical applications, when using finite element software to analyze variable temperature components, corresponding application conditions should be added. Specifically, the analysis scenario in the finite element software is set to the service condition, and the parameters corresponding to each grid node under the service condition are entered. In this way, the temperature and stress distribution of all grid nodes of the variable temperature component under the service condition can be determined by analysis. The temperature corresponding to the i-th grid node is recorded as Ti, and the Mises stress is recorded as σ i .

[0062] In addition, since the processing methods of the temperature-changing components are different, this application can describe one possible processing method.

[0063] In one case, regarding how to process a variable temperature component, the method further includes:

[0064] Simplifying the temperature-changing component to obtain a simplified geometric model of the temperature-changing component;

[0065] A finite element model of the temperature-changing component is obtained according to the simplified geometric modeling model.

[0066] In practical applications, finite element software is required to analyze temperature and stress fields. However, for analysis efficiency, the temperature-variable component can be preprocessed. Specifically, the temperature-variable component can be simplified to obtain a simplified geometric model of the temperature-variable component. The simplified geometric model is then substituted into the finite element software to obtain a finite element model of the temperature-variable component.

[0067] In addition, since there are different ways to simplify the temperature-changing components, this application can illustrate possible simplification methods.

[0068] In one case, regarding how to simplify a temperature-variable component, the simplified processing of the temperature-variable component to obtain a simplified geometric model of the temperature-variable component includes:

[0069] Obtaining a three-dimensional structural model of the temperature-changing component;

[0070] Using modeling software to split the three-dimensional structural model, remove target features of each split structural component, and obtain a simplified geometric model of the temperature-variable component;

[0071] The target features include: bolt holes.

[0072] In practical applications, to achieve structural simplification of variable temperature components, it is necessary to first obtain a three-dimensional structural model of the variable temperature component, which can be achieved using three-dimensional modeling software. For example, technicians can use three-dimensional modeling software to construct a three-dimensional structural model of the variable temperature component based on the structural drawings of the variable temperature component, and then send it to the loading strength design device of the variable temperature component. After obtaining the three-dimensional structural model of the variable temperature component, the three-dimensional structural model is split using three-dimensional modeling software, and the target features of each split structural component are removed, retaining only the key structural units, thereby obtaining a simplified geometric modeling model of the variable temperature component. It should be noted that the target features include small components such as bolt holes and bolts.

[0073] In addition, since there are different ways to obtain the finite element model, this application may describe possible ways to obtain it.

[0074] In one embodiment, regarding how to obtain a finite element model, the method of obtaining the finite element model of the temperature-variable component according to the simplified geometric modeling model includes:

[0075] Importing the simplified geometric model into finite element software;

[0076] Inputting the material parameters of each split structural component into finite element software to obtain a finite element model of the temperature-changing component;

[0077] The various split structural components are discretized in the form of grid units, and the grid units are connected using common nodes.

[0078] In practical applications, after obtaining a simplified geometric model, it can be directly imported into the finite element model. Material parameters are then defined for each of the separated structural components, resulting in a finite element model of the temperature-variable component. It is important to note that material parameters include, but are not limited to, density, elastic modulus, and Poisson's ratio. Furthermore, each separated structural component is discretized as a grid element, and the grid elements are connected using common nodes.

[0079] S103: In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading strength function for analysis to obtain analysis results.

[0080] In practical applications, combined with the above, after analysis, the temperature of the i-th grid node is recorded as Ti, and the Mises stress is recorded as σ i . Establish the loading intensity function: F(i) = kσ i / σ s (T i ) and write it into the finite element post-processing program, where k is the safety factor, which is generally 1.5. After the finite element software analyzes the temperature and Mises stress of the i-th grid node, substitute the loading intensity function and combine it with the above material yield strength function: σ s (T), the loading intensity of the i-th grid node can be determined.

[0081] In addition, since the analysis methods are different, this application can describe one possible analysis method.

[0082] In one case, regarding how to analyze the loading strength of each grid node, S103: combining the material yield strength function, substituting the temperature and Mises stress of each grid node into the loading strength function for analysis, and obtaining analysis results, specifically including:

[0083] In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading intensity function for analysis to obtain an analysis result of whether the loading intensity meets or does not meet the first preset threshold;

[0084] The first preset threshold ranges from greater than or equal to 0.8 to less than or equal to 1.

[0085] In practical applications, the optimization interval is determined by setting the first preset threshold. Correspondingly, after analysis, the temperature of the i-th grid node is recorded as Ti, and the Mises stress is recorded as σ i Then substitute the loading intensity function: F(i) = kσ i / σ s (T i ) and combined with the above material yield strength function: σ s(T), determine the value of the loading intensity of the i-th grid node, and then compare it with the first preset threshold to determine whether optimization is required. Specifically, the range of the first threshold set in this application is greater than or equal to 0.8 to less than or equal to 1. If the value of the loading intensity obtained by analysis falls within this interval, it indicates that the loading intensity of the i-th grid node meets the requirements and no optimization is required, thereby obtaining an analysis result that the loading intensity meets the first preset threshold. If the value of the loading intensity obtained by analysis does not fall within this interval, it indicates that the loading intensity of the i-th grid node does not meet the requirements and needs to be optimized, thereby obtaining an analysis result that the loading intensity does not meet the first preset threshold.

[0086] S104: Optimizing the temperature-changing component according to the analysis results to implement the structural design of the temperature-changing component.

[0087] In practical applications, variable temperature components have a load-bearing function. During design, the maximum stress is generally considered to meet the allowable stress requirements. The magnitude of the stress depends on the cross-sectional area of ​​the component, that is, the minimum cross-sectional area is limited. However, for the supporting components of the low-temperature system, they need to operate between low temperature and room temperature. Their internal thermal resistance determines the size of the heat flux conducted per unit time. Generally, the maximum heat flux per unit time is required to be less than the cooling work of the refrigeration system. The thermal resistance is inversely proportional to the cross-sectional area, that is, the cross-sectional area of ​​the load-bearing component has restrictions. Therefore, based on the specific analysis results, the variable temperature components are optimized accordingly to achieve the structural design of the variable temperature components.

[0088] In addition, since the optimization methods of the temperature-changing components are different, this application can describe possible optimization methods.

[0089] In one case, regarding how to optimize the temperature-variable component, S104: optimizing the temperature-variable component according to the analysis results to implement the structural design of the temperature-variable component specifically includes:

[0090] Determining specific loading intensities of grid nodes that do not meet a first preset threshold;

[0091] When the loading strength of the grid node is less than 0.8, thinning the grid node along the direction of heat conduction;

[0092] When the loading intensity of the grid unit is greater than 1, the grid nodes are thickened along the direction of the force line.

[0093] In practical applications, as mentioned above, the loading intensity function is: F(i) = kσ i / σ s (T i) can determine the loading intensity of the i-th grid node. In addition, the range of the first preset threshold is greater than or equal to 0.8 to less than or equal to 1. Determine the positions where the loading intensity is higher than 1 and the positions where the loading intensity is less than 0.8 in all grid nodes, and use them as subsequent optimization objects. The positions where the loading intensity is higher than 1 are thickened along the direction of the force line, and the positions where the loading intensity is less than 0.8 are thinned along the direction of the heat conduction flow. Until the loading intensity of all grid nodes meets the first preset threshold, the structural design of the temperature variable component is considered to be completed.

[0094] In summary, the present application first obtains the temperature-dependent material yield strength function of the variable temperature component, and uses finite element software to perform temperature field analysis and stress field analysis on the variable temperature component to obtain the temperature and Mises stress of each grid node of the variable temperature component. Then, in combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading intensity function for analysis to obtain the analysis results. Finally, the variable temperature component is optimized based on the analysis results to realize the structural design of the variable temperature component. Thus, the temperature field and stress field analysis of the variable temperature component is performed, and the loading intensity function is used for analysis in combination with the material yield strength function, and then the structure of the variable temperature component is optimized so that the variable temperature component achieves the optimal structural size, thereby improving the lightweight level while ensuring the reduction of heat leakage.

[0095] Based on the method for designing the loading strength of a temperature-variable component provided in the above embodiment, the present application further provides a device for designing the loading strength of a temperature-variable component. The device for designing the loading strength of a temperature-variable component will be described below in conjunction with the embodiments and drawings.

[0096] FIG2 is a schematic diagram of the structure of a device for designing the loading strength of a temperature-variable component according to an embodiment of the present application. Referring to FIG2 , the device 200 for designing the loading strength of a temperature-variable component according to an embodiment of the present application includes:

[0097] An acquisition module 201 is used to obtain a temperature-dependent material yield strength function of a temperature-variable component;

[0098] A first analysis module 202 is configured to perform temperature field analysis and stress field analysis on the temperature-variable component using finite element software to obtain the temperature and Mises stress of each grid node of the temperature-variable component;

[0099] The second analysis module 203 is used to combine the material yield strength function, substitute the temperature and Mises stress of each grid node into the loading strength function for analysis, and obtain analysis results;

[0100] The optimization module 204 is used to optimize the temperature-changing component according to the analysis results to realize the structural design of the temperature-changing component.

[0101] As an embodiment, regarding how to analyze a temperature-variable component using finite element software, the first analysis module 202 is specifically configured to:

[0102] In combination with the actual operating conditions of the temperature-changing component, parameters are set for each grid node of the temperature-changing component in finite element software;

[0103] In combination with the parameter settings, temperature field analysis and stress field analysis are performed on the temperature-variable component to determine the temperature and Mises stress of each grid node.

[0104] As an embodiment, regarding how to combine the material yield strength function, substitute the temperature and Mises stress of each grid node into the loading intensity function for analysis to obtain analysis results, the above-mentioned second analysis module 203 is specifically used to:

[0105] In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading intensity function for analysis to obtain an analysis result of whether the loading intensity meets or does not meet the first preset threshold;

[0106] The first preset threshold ranges from greater than or equal to 0.8 to less than or equal to 1.

[0107] As an embodiment, regarding how to determine how to optimize the temperature-variable component, the optimization module 204 is specifically configured to:

[0108] Determining specific loading intensities of grid nodes that do not meet a first preset threshold;

[0109] When the loading strength of the grid node is less than 0.8, the grid node is thinned along the direction of heat conduction;

[0110] When the loading intensity of the grid unit is greater than 1, the grid nodes are thickened along the direction of the force line.

[0111] As an embodiment, in order to efficiently optimize the temperature-variable component, the temperature-variable component loading strength design device 200 further includes: a simplification module and an acquisition submodule;

[0112] A simplification module, configured to simplify the temperature-variable component to obtain a simplified geometric model of the temperature-variable component;

[0113] An acquisition submodule is used to acquire a finite element model of the temperature-variable component according to the simplified geometric modeling model.

[0114] As an implementation method, in order to efficiently optimize the temperature-changing component, the simplified module is specifically used to:

[0115] Obtaining a three-dimensional structural model of the temperature-changing component;

[0116] Using modeling software to split the three-dimensional structural model, remove target features of each split structural component, and obtain a simplified geometric model of the temperature-variable component;

[0117] The target features include: bolt holes.

[0118] As an implementation method, in order to efficiently optimize the temperature-variable component, the acquisition submodule is specifically used to:

[0119] Importing the simplified geometric model into finite element software;

[0120] Inputting the material parameters of each split structural component into finite element software to obtain a finite element model of the temperature-changing component;

[0121] The various split structural components are discretized in the form of grid units, and the grid units are connected using common nodes.

[0122] In summary, the present application first obtains the temperature-dependent material yield strength function of the variable temperature component, and uses finite element software to perform temperature field analysis and stress field analysis on the variable temperature component to obtain the temperature and Mises stress of each grid node of the variable temperature component. Then, in combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading intensity function for analysis to obtain the analysis results. Finally, the variable temperature component is optimized based on the analysis results to realize the structural design of the variable temperature component. Thus, the temperature field and stress field analysis of the variable temperature component is performed, and the loading intensity function is used for analysis in combination with the material yield strength function, and then the structure of the variable temperature component is optimized so that the variable temperature component achieves the optimal structural size, thereby improving the lightweight level while ensuring the reduction of heat leakage.

[0123] In addition, the present application also provides a loading strength design device for a variable temperature component, comprising: a memory for storing a computer program; and a processor for implementing the steps of the loading strength design method for a variable temperature component as described in any one of the above items when executing the computer program.

[0124] In addition, the present application also provides a 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 designing the loading strength of a temperature-variable component as described in any one of the above items are implemented.

[0125] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for designing the loading strength of a temperature-variable component, characterized in that: The method comprises: Obtaining the temperature-dependent material yield strength function of the variable temperature component; Using finite element software to perform temperature field analysis and stress field analysis on the temperature-changing component to obtain the temperature and Mises stress of each grid node of the temperature-changing component; In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading strength function for analysis to obtain analysis results; The temperature-changing component is optimized according to the analysis result to realize the structural design of the temperature-changing component.

2. The method according to claim 1, characterized in that Before performing temperature field analysis and stress field analysis on the temperature-changing component using finite element software to obtain the temperature and Mises stress of each grid node of the temperature-changing component, the method further includes: Simplifying the temperature-changing component to obtain a simplified geometric model of the temperature-changing component; A finite element model of the temperature-changing component is obtained according to the simplified geometric modeling model.

3. The method according to claim 2, characterized in that The step of simplifying the temperature-changing component to obtain a simplified geometric model of the temperature-changing component includes: Acquire a three-dimensional structural model of the temperature-changing component; Using modeling software to split the three-dimensional structural model, remove target features of each split structural component, and obtain a simplified geometric modeling model of the temperature-changing component; The target features include: bolt holes.

4. The method according to claim 3, characterized in that The step of obtaining the finite element model of the temperature-changing component according to the simplified geometric modeling model comprises: Importing the simplified geometric modeling model into finite element software; Inputting material parameters of each split structural component into finite element software to obtain a finite element model of the temperature-changing component; Each of the split structural components is discretized in the form of grid units, and the grid units are connected by common nodes.

5. The method according to claim 1, characterized in that The method of using finite element software to perform temperature field analysis and stress field analysis on the temperature-changing component to obtain the temperature and Mises stress of each grid node of the temperature-changing component includes: In combination with the actual conditions of the temperature-changing component during operation, parameters of each grid node of the temperature-changing component are set in finite element software; In combination with the parameter settings, temperature field analysis and stress field analysis are performed on the temperature-variable component to determine the temperature and Mises stress of each grid node.

6. The method according to claim 1, characterized in that In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading strength function for analysis to obtain analysis results, including: In combination with the material yield strength function, the temperature and Mises stress of each grid node are substituted into the loading strength function for analysis to obtain an analysis result of whether the loading strength meets the first preset threshold or does not meet the first preset threshold; The first preset threshold value ranges from greater than or equal to 0.8 to less than or equal to 1.

7. The method according to claim 6, characterized in that The step of optimizing the temperature-changing component according to the analysis result to realize the structural design of the temperature-changing component includes: Determine the specific loading intensity of the grid nodes that do not meet the first preset threshold; When the loading strength of the grid node is less than 0.8, the grid node is thinned along the direction of the conduction heat flow; When the loading strength of the grid unit is greater than 1, the grid nodes are thickened along the force line direction.

8. A device for designing the loading strength of a temperature-variable component, characterized in that: include: An acquisition module is used to obtain a material yield strength function of a variable temperature component related to temperature; The first analysis module is used to perform temperature field analysis and stress field analysis on the temperature-changing component using finite element software to obtain the temperature and Mises stress of each grid node of the temperature-changing component; The second analysis module is used to combine the material yield strength function, substitute the temperature and Mises stress of each grid node into the loading strength function for analysis, and obtain the analysis result; The optimization module is used to optimize the temperature-changing component according to the analysis result to realize the structural design of the temperature-changing component.

9. A loading strength design device for a temperature-variable component, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the loading strength design method for a variable temperature component as described in any one of claims 1 to 7 when executing the computer program.

10. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for designing the loading strength of a temperature-changing component according to any one of claims 1 to 7 are implemented.

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