Creep-fatigue damage assessment method and system for whole process of heat exchanger

Abstract

The invention relates to the technical field of reactor engineering, and discloses a heat exchanger full-flow creep-fatigue damage assessment method and system, and the method comprises the steps: inputting corresponding monitoring data of a target heat exchanger, and calculating and outputting corresponding thermal parameter information based on a thermal fluid calculation method; a heat exchanger three-dimensional parameterized model is established, finite element simulation calculation is conducted on a target heat exchanger in combination with a finite element analysis tool and thermal parameter information, and key node parameter information is obtained; and on the basis of the key node parameter information, creep-fatigue damage calculation and life pre-evaluation are conducted on the target heat exchanger by combining an elastic analysis method and a non-elastic analysis method, and a result is output. Creep-fatigue damage evaluation of the whole heat exchanger is streamlined and automatic, faster and more comprehensive evaluation is realized, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of reactor engineering technology, and in particular to a full-process creep-fatigue damage assessment method and system for a heat exchanger. Background Art

[0002] The heat exchanger is the core main heat exchange equipment of the sodium-cooled fast reactor. Its structural safety and service life determine the safety and economic performance of the entire reactor. During its service, it faces complex mechanical (internal pressure, etc.), high temperature, temperature difference and other combined load conditions. In addition, the discontinuous characteristics of the structure make the heat exchanger have complex stress-strain distribution. Its creep-fatigue problem is the content that needs to be paid special attention to. Based on this, it is necessary to carry out creep-fatigue damage analysis of the heat exchanger, monitor the operating status, and ensure its long-term safe operation.

[0003] For the creep-fatigue damage assessment of high-temperature components such as heat exchangers, the elastic assessment method in the high-temperature strength design specifications (such as ASME, RCC-MRx, etc.) is usually used for calculation and assessment first. If the damage value calculated by the elastic assessment method is too large and does not meet the design evaluation standard, the inelastic assessment method is used to calculate the creep-fatigue damage. However, regardless of the elastic analysis method or the inelastic analysis method, the calculation and assessment process involves a large amount of finite element calculation, data export and calculation, and a large amount of work requires manual participation, which requires a high level of professionalism from engineers. In addition, the finite element calculation of the heat exchanger structure generally requires thermal fluid calculation to provide thermal boundary parameters. The entire evaluation process requires cooperation between thermal fluid, structure and other professionals, resulting in a complex analysis process and a long evaluation cycle.

[0004] Therefore, how to efficiently and comprehensively conduct creep-fatigue damage assessment of heat exchanger equipment based on elastic and inelastic analysis methods and establish an automated analysis process has become an urgent problem to be solved at this stage. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a creep-fatigue damage assessment method and system for the entire process of a heat exchanger, proposes a thermal fluid calculation algorithm for a heat exchanger and an elastic and inelastic creep-fatigue damage assessment algorithm, and integrates three-dimensional modeling software and commercial finite element analysis programs to streamline and automate the creep-fatigue damage assessment process of the entire heat exchanger, thereby achieving faster and more comprehensive assessment and improving work efficiency.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A creep-fatigue damage assessment method for the entire process of a heat exchanger, comprising:

[0008] Input the corresponding monitoring data of the target heat exchanger, calculate and output the corresponding thermal parameter information based on the thermal fluid calculation method;

[0009] Establish a three-dimensional parametric model of the heat exchanger, combine finite element analysis tools and thermal parameter information, perform finite element simulation calculations on the target heat exchanger, and obtain key node parameter information;

[0010] Based on the key node parameter information, in combination with elastic analysis method and inelastic analysis method, creep-fatigue damage calculation and life pre-evaluation of the target heat exchanger are performed, and the results are output.

[0011] Furthermore, the three-dimensional parametric model of the heat exchanger is established, and the finite element analysis tool and thermal parameter information are combined to perform finite element simulation calculation on the target heat exchanger to obtain key node parameter information, including:

[0012] A three-dimensional parametric model of the heat exchanger is established and a finite element analysis tool is integrated. The data interface of the finite element analysis tool is called to perform finite element simulation calculations, thereby calculating key node parameter information of the target heat exchanger, wherein the key node parameter information includes temperature, stress and strain data.

[0013] Furthermore, finite element simulation calculation is performed on the target heat exchanger to obtain key node parameter information, including:

[0014] The temperature field and stress field calculations are performed on the target heat exchanger. The temperature data of the key nodes of the target heat exchanger are output through the temperature field calculation, and the stress and strain data of the key nodes of the target heat exchanger are output through the stress field calculation.

[0015] Furthermore, after the corresponding thermal parameter information is calculated and output based on the thermal fluid calculation method, the method further includes:

[0016] The thermal parameter information is lightweight processed based on a lightweight data processing method, and the thermal parameter information after lightweight processing meets preset accuracy requirements.

[0017] Furthermore, after performing creep-fatigue damage calculation and life pre-assessment on the target heat exchanger, the method of outputting the result includes:

[0018] Information integration display, wherein the information integration display includes equipment operation and pre-assessment information display and system key information display.

[0019] A creep-fatigue damage assessment system for the entire process of a heat exchanger, comprising:

[0020] The data interface module is configured to input the corresponding monitoring data of the target heat exchanger, calculate and output the corresponding thermal parameter information based on the thermal fluid calculation method;

[0021] The analysis and calculation module is configured to establish a three-dimensional parametric model of the heat exchanger, combine the finite element analysis tool and thermal parameter information, perform finite element simulation calculation on the target heat exchanger, and obtain key node parameter information;

[0022] The performance analysis and pre-evaluation module is configured to perform creep-fatigue damage calculation and life pre-evaluation on the target heat exchanger based on the key node parameter information in combination with elastic analysis method and inelastic analysis method, and output the results.

[0023] Furthermore, in the analysis and calculation module, a three-dimensional parameterized model of the heat exchanger is established, and a finite element simulation calculation is performed on the target heat exchanger in combination with a finite element analysis tool and thermal parameter information to obtain key node parameter information, including:

[0024] A three-dimensional parametric model of the heat exchanger is established and a finite element analysis tool is integrated. The data interface of the finite element analysis tool is called to perform finite element simulation calculations, thereby calculating key node parameter information of the target heat exchanger, wherein the key node parameter information includes temperature, stress and strain data.

[0025] Furthermore, in the analysis and calculation module, finite element simulation calculation is performed on the target heat exchanger to obtain key node parameter information, including:

[0026] The temperature field and stress field calculations are performed on the target heat exchanger. The temperature data of the key nodes of the target heat exchanger are output through the temperature field calculation, and the stress and strain data of the key nodes of the target heat exchanger are output through the stress field calculation.

[0027] Furthermore, it also includes a data processing module, which is configured to perform lightweight processing on the thermal parameter information based on a lightweight data processing method, and make the thermal parameter information after lightweight processing meet preset accuracy requirements.

[0028] Furthermore, it also includes a visualization integration module, which is configured to perform information integration display and system control, and the information integration display includes equipment operation and pre-assessment information display and system key information display.

[0029] The beneficial effects of the present invention are:

[0030] The present invention reduces a large amount of repetitive work in traditional calculation methods to a minimum by automating the calculation process of creep-fatigue damage assessment of the entire process of the heat exchanger, improves the efficiency of the traditional calculation method by at least 50%, and reduces the requirements for users.

[0031] The present invention can simultaneously perform elastic analysis method evaluation and non-elastic analysis method evaluation through calibration of the corresponding models of each calculation process and development of elastic analysis method and non-elastic analysis method evaluation algorithms, and the evaluation is more comprehensive and accurate, so that the creep-fatigue damage evaluation calculation of the whole process of the heat exchanger is more accurate and the result is more reliable.

[0032] The present invention realizes a streamlined and automated evaluation process from thermal parameter calculation, three-dimensional model establishment, finite element analysis, and creep-fatigue damage assessment, thereby improving analysis efficiency and lowering the threshold for use by personnel. At the same time, based on a calibrated calculation model and damage assessment for heat exchangers, it includes elastic analysis methods and inelastic analysis methods, making the calculation results more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of a method for evaluating creep-fatigue damage of a heat exchanger in the entire process according to Example 1 of the present invention.

[0034] Figure 2 This is a general architecture diagram of a full-process creep-fatigue damage assessment system for a heat exchanger according to Example 1 of the present invention.

[0035] Figure 3 It is a functional module diagram of the creep-fatigue damage assessment system software for the entire process of a heat exchanger according to Example 1 of the present invention.

[0036] Figure 4 This is a deployment structure diagram of a creep-fatigue damage assessment system for a heat exchanger in the entire process according to Example 1 of the present invention. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] Since the creep-fatigue damage assessment of heat exchangers involves multiple models, multiple disciplines and multiple methods, and traditional analysis methods are mostly manual analysis, commonly used analysis methods include elastic analysis methods and inelastic analysis methods. The entire analysis process involves multiple disciplines such as thermal fluid and structure, and analysts need to have certain engineering experience. Generally, it is necessary to first establish a three-dimensional structural model of the heat exchanger, and then import the finite element analysis software to perform many operations such as material definition, mesh division, connection relationship setting, load and boundary condition setting. After the calculation is completed, it is necessary to extract the temperature, stress, strain and other time history information of the nodes at the location of concern and perform creep-fatigue damage and life assessment in accordance with the specifications. Overall, the entire heat exchanger performance analysis process is complex, the analysis efficiency is low, and the actual operation process data is huge.

[0040] Based on this, this embodiment provides a creep-fatigue damage assessment method for the entire process of a heat exchanger, including:

[0041] Input the corresponding monitoring data of the target heat exchanger, calculate and output the corresponding thermal parameter information based on the thermal fluid calculation method;

[0042] Establish a three-dimensional parametric model of the heat exchanger, combine finite element analysis tools and thermal parameter information, perform finite element simulation calculations on the target heat exchanger, and obtain key node parameter information;

[0043] Based on the key node parameter information, combined with elastic analysis method and inelastic analysis method, creep-fatigue damage calculation and life pre-evaluation of the target heat exchanger are performed, and the results are output.

[0044] Specifically, Figure 1 As shown, the creep-fatigue damage assessment method for the whole process of the heat exchanger in this embodiment can be implemented by the following process:

[0045] 1. Import the power plant monitoring data, use the thermal fluid calculation program to calculate and output the corresponding thermal parameter information;

[0046] 2. Use lightweight data processing programs to automatically process thermal parameter information, so that thermal boundary parameters can achieve lightweight data while meeting accuracy requirements;

[0047] 3. Based on the established three-dimensional parametric model of the heat exchanger, use finite element analysis tools (such as ABAQUS software) to perform finite element simulation calculations of the heat exchanger to obtain temperature, stress and strain data of key nodes;

[0048] 4. Using the creep-fatigue damage calculation program based on elastic analysis method and inelastic analysis method, receiving the input data of temperature, stress and strain from finite element calculation, performing creep-fatigue damage calculation and life pre-evaluation of the heat exchanger, and outputting the calculation results.

[0049] Based on the above analysis process, this embodiment proposes a creep-fatigue damage assessment system for the entire process of the heat exchanger, which realizes the automation of the process through a friendly human-computer interaction interface, reduces the difficulty of analysis, and improves the accuracy of analysis. Data transmission between process modules is realized through a unified data interface specification; effective management and circulation of process models and data are achieved through the development of a database; in order to ensure the safe and effective operation of this system, a security system is developed to manage users, permissions, audits, data backup, secure login, etc. Specific instructions are as follows.

[0050] 1. Overall Architecture

[0051] like Figure 2 As shown in the figure, the overall architecture of the entire system is divided into five layers from bottom to top: infrastructure layer, data resource layer, data service layer, data interface layer and application system layer.

[0052] Infrastructure layer: mainly composed of hardware devices, including algorithm servers for simulation calculations and performance and pre-assessment calculations, database servers for storing business data and security data, storage servers for storing backup data files, and basic network equipment.

[0053] Data resource layer: mainly composed of three types of data, including business data, security data and backup data. Among them, business data includes material data, geometric model data, state parameter data, analysis load data, simulation calculation result data, performance and pre-assessment data, and log report data; security data includes: user data, permission data, and security audit data; backup data includes backup strategy data and backup history data.

[0054] Data service layer: mainly includes simulation computing services and log services. Simulation computing services include: finite element simulation, performance analysis and pre-evaluation analysis.

[0055] Data interface layer: mainly includes external interface, internal interface and security interface. The external interface is mainly responsible for communicating with external systems, including thermal data import interface, simulation calculation result export interface, life assessment result import interface and takeover load data collection interface; the internal interface is used to control simulation calculation and display performance evaluation and log report, etc., mainly including: information integration display interface, simulation calculation control interface, performance and pre-assessment calculation control interface, log report interface; the security interface is responsible for system security and data security, including identity authentication interface, permission interface, data backup control interface and security audit interface.

[0056] Application system layer: including business system and security system. Business system refers to the heat exchanger performance operation analysis and pre-evaluation system; security system refers to the user system, authority system, data backup system, security audit system, and single sign-on system.

[0057] 2. Implementation Logic

[0058] Preferably, the implementation logic of the evaluation system of this embodiment can be implemented by the following steps:

[0059] S1. Establish a front-end software interface, and send instructions to the back-end program through the front-end interface to establish analysis tasks.

[0060] S2. Enter the thermal calculation program. The program imports the power plant data in the front-end interface and calls the thermal program for calculation. After the calculation is completed, the result file is output and the data is lightweight processed. The processed thermal parameters are stored in the database.

[0061] S3. Based on the three-dimensional parametric model of the heat exchanger, the geometric model is updated and output based on the Catia macro script.

[0062] S4. Based on the finite element analysis software Abaqus and analysis scripts, after the front end issues a calculation instruction, the back end imports the thermal fluid parameters into the analysis script, and then calls the Abaqus finite element analysis program through the analysis script to perform calculations and output the temperature, stress, strain and other information of the corresponding nodes.

[0063] S5. Based on elastic analysis method and inelastic analysis method, develop and integrate creep-fatigue damage assessment program. This damage assessment program uses the previous Abaqus calculation results to perform creep-fatigue damage and life assessment of each component of the heat exchanger, and writes the assessment results into a Word report.

[0064] Through the above steps, a large amount of work that traditionally requires human participation can be handled by the computer platform, realizing automated thermal calculations, finite element calculations, creep-fatigue damage and life assessment processes.

[0065] 3. Development Plan and Language

[0066] In this embodiment, the software architecture can adopt B / S architecture, i.e. browser / server, and the program is divided into three types, i.e. page program, web service program and windows service program. The page program can be developed in .net language, the web service program can be developed in java language, the framework can adopt lightweight springboot+mybatis framework, the windows service program can be developed in C# language, and the database uses mysql database.

[0067] 4. Software Modules

[0068] In this embodiment, the evaluation system is composed of six modules: data interface module, database module, analysis and calculation module, performance analysis and pre-evaluation module, visualization integration module and log report module. Figure 3 shown.

[0069] Data interface module: This module is a bridge for data information transmission within and outside the system, and has data interface, data conversion and data transmission functions.

[0070] Database module: This module is the data core of the system. Its function is to store and manage the input data, output data and operation data of the system according to fixed rules.

[0071] Analysis and calculation module: This module is the analysis and calculation core of the system. Its function is to call the database module data and the ABAQUS finite element analysis program to complete the analysis and calculation of the temperature field and stress field of the heat exchanger. The calculation result data is transmitted to the data interface module, performance analysis and pre-evaluation module, log report module and calculation result database according to the system process.

[0072] Performance analysis and pre-evaluation module: This module is based on the temperature, stress and strain results output by the analysis and calculation module, calls the creep-fatigue analysis program, and analyzes the creep-fatigue damage of key positions of the heat exchanger.

[0073] Visualization integration module: This module mainly realizes two major functions: information integration display and system control. It is an integrated module for equipment operation and pre-assessment information display, main system key information display and system control.

[0074] Log report module: The function of this module is to output the equipment evaluation result file in the form of a report.

[0075] 5. Deployment Structure

[0076] In this embodiment, the overall deployment structure is divided into six parts, such as Figure 4 As shown, they are application server, Web service, database service, Windows service, task scheduling center, and file storage service.

[0077] Application server: provides website page services for system users. Six website systems are deployed in the service, namely single sign-on system, heat exchanger operation analysis and pre-assessment system, user system, permission system, data backup system, and security audit system. Users access the single sign-on system through a browser to handle business.

[0078] Web service: provides data support for the business system in the application server. The service includes internal data interface, external data interface, and secure data interface.

[0079] Database service: Provides data services for Web services. Web services access the database through the jdbc-odbc bridge connection and obtain table data through standard T-SQL input. The database divides the tables according to business logic, including: material library, geometric model library, state parameter library, analysis load library, calculation result library, evaluation result library, log report library, user library, permission library, security audit library, and data backup library.

[0080] Task Scheduling Center: Provides task scheduling services for Windows service groups. The Task Scheduling Center obtains task scheduling data through database services, and according to the task scheduling data, classifies the task data and inserts it into the corresponding data queue according to the principle of "first in, first out", waiting for Windows service calls.

[0081] Windows service: Windows service includes a service group, which includes data processing service, simulation calculation service, fatigue-creep damage calculation service, and log generation service. The service group accesses the task scheduling center in a polling manner, and obtains a task for processing each time. Among them:

[0082] a) The task of data processing service is to parse thermal engineering files and life assessment result files, extract useful information for calculation, convert data, and save them in the database.

[0083] b) The task of simulation calculation service is to model the geometric model, integrate ABAQUS software, call the data interface of ABAQUS software, and realize simulation calculation. Simulation calculation includes: temperature field calculation and stress field calculation, and finally output node temperature, stress and strain information.

[0084] c) The task of the fatigue-creep damage assessment calculation service is to calculate the node temperature, strain and stress output by the simulation calculation service in accordance with the ASME standard, and obtain the fatigue damage and creep damage assessment results based on the elastic and inelastic assessment algorithms.

[0085] d) The task of the log generation service collects the equipment operation information, calculation analysis information, evaluation result information, etc. during the calculation process, and generates a log report according to the template.

[0086] File storage service: Provides storage services for data files such as thermal data files, calculation result files, evaluation result files, log report files, and database backup files for the heat exchanger performance and pre-evaluation system.

[0087] VI. Evaluation Process

[0088] In this embodiment, the entire creep-fatigue damage assessment process can be implemented as follows:

[0089] Create task: the beginning of the entire calculation, generating calculation tasks, and establishing work task folders.

[0090] Thermal calculation: import thermal data and call thermal program for calculation.

[0091] Simulation analysis: Establish a three-dimensional model of the heat exchanger, associate thermal parameters, and call ABAQUS software for calculation.

[0092] Creep-fatigue damage assessment: Call ABAQUS software calculation results and creep-fatigue damage assessment program to complete the creep-fatigue damage calculation of key positions of the heat exchanger.

[0093] In summary, the heat exchanger full-process creep-fatigue damage assessment system of this embodiment has the following advantages:

[0094] (1) The heat exchanger model can be parameterized and the model can be automatically updated through parameter control.

[0095] (2) A calculation method for thermal fluid in heat exchangers was proposed and the process was encapsulated to realize the automation of thermal fluid calculation in heat exchangers.

[0096] (3) A data lightweight processing method is proposed to realize the automation of lightweight processing of thermal fluid calculation data and ensure data accuracy.

[0097] (4) Based on the computational calibration of the heat exchanger finite element analysis model, the finite element analysis process is proposed a second time to achieve automation of the process.

[0098] (5) A creep-fatigue damage calculation method based on elastic analysis method and inelastic analysis method is proposed to conduct a comprehensive and complete evaluation of heat exchanger equipment with different degrees of conservatism, thus realizing the automation of the calculation process.

[0099] (6) The integrated packaging of parametric modeling, thermal fluid calculation, data lightweight processing methods, finite element analysis and creep-fatigue damage calculation methods can realize the automatic transmission of data between process modules, break down the barriers between disciplines, reduce the difficulty of analysis, and realize the automation of the entire process, which can be used to conduct a comprehensive and complete evaluation of heat exchanger equipment with different degrees of conservatism.

[0100] Example 2

[0101] This embodiment is based on embodiment 1:

[0102] This embodiment provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the creep-fatigue damage assessment method for the whole process of the heat exchanger of embodiment 1 is implemented. The computer program may be in source code form, object code form, executable file, or some intermediate form.

[0103] Example 3

[0104] This embodiment is based on embodiment 1:

[0105] The present embodiment provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the creep-fatigue damage assessment method for the entire process of a heat exchanger of Embodiment 1. The computer program may be in source code form, object code form, executable file, or some intermediate form, etc. The storage medium includes: any entity or device capable of carrying computer program code, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content contained in the storage medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the storage medium does not include electric carrier signals and telecommunication signals.

[0106] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity of description, they are expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the order of the actions described, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

Claims

1. A creep-fatigue damage assessment method for the entire process of a heat exchanger, characterized in that: include: Input the corresponding monitoring data of the target heat exchanger, calculate and output the corresponding thermal parameter information based on the thermal fluid calculation method; Establish a three-dimensional parametric model of the heat exchanger, combine finite element analysis tools and thermal parameter information, perform finite element simulation calculations on the target heat exchanger, and obtain key node parameter information; Based on the key node parameter information, in combination with elastic analysis method and inelastic analysis method, creep-fatigue damage calculation and life pre-evaluation of the target heat exchanger are performed, and the results are output.

2. A creep-fatigue damage assessment method for the entire process of a heat exchanger according to claim 1, characterized in that: The three-dimensional parametric model of the heat exchanger is established, and the finite element analysis tool and thermal parameter information are combined to perform finite element simulation calculation on the target heat exchanger to obtain key node parameter information, including: A three-dimensional parametric model of the heat exchanger is established and a finite element analysis tool is integrated. The data interface of the finite element analysis tool is called to perform finite element simulation calculations, thereby calculating key node parameter information of the target heat exchanger, wherein the key node parameter information includes temperature, stress and strain data.

3. The creep-fatigue damage assessment method for the whole process of a heat exchanger according to claim 1, characterized in that: Perform finite element simulation calculation on the target heat exchanger to obtain key node parameter information, including: The temperature field and stress field calculations are performed on the target heat exchanger. The temperature data of the key nodes of the target heat exchanger are output through the temperature field calculation, and the stress and strain data of the key nodes of the target heat exchanger are output through the stress field calculation.

4. The creep-fatigue damage assessment method for the entire process of a heat exchanger according to claim 1, characterized in that: After the corresponding thermal parameter information is calculated and output based on the thermal fluid calculation method, the method further includes: The thermal parameter information is lightweight processed based on a lightweight data processing method, and the thermal parameter information after lightweight processing meets the preset accuracy requirement.

5. The creep-fatigue damage assessment method for the entire process of a heat exchanger according to claim 1, characterized in that: After performing creep-fatigue damage calculation and life pre-evaluation on the target heat exchanger, the output results include: Information integration display, wherein the information integration display includes equipment operation and pre-assessment information display and system key information display.

6. A creep-fatigue damage assessment system for the entire process of a heat exchanger, characterized in that: include: The data interface module is configured to input the corresponding monitoring data of the target heat exchanger, calculate and output the corresponding thermal parameter information based on the thermal fluid calculation method; The analysis and calculation module is configured to establish a three-dimensional parametric model of the heat exchanger, combine the finite element analysis tool and thermal parameter information, perform finite element simulation calculation on the target heat exchanger, and obtain key node parameter information; The performance analysis and pre-evaluation module is configured to perform creep-fatigue damage calculation and life pre-evaluation on the target heat exchanger based on the key node parameter information in combination with elastic analysis method and inelastic analysis method, and output the results.

7. A heat exchanger full-process creep-fatigue damage assessment system according to claim 6, characterized in that: In the analysis and calculation module, a three-dimensional parameterized model of the heat exchanger is established, and a finite element simulation calculation is performed on the target heat exchanger in combination with finite element analysis tools and thermal parameter information to obtain key node parameter information, including: A three-dimensional parametric model of the heat exchanger is established and a finite element analysis tool is integrated. The data interface of the finite element analysis tool is called to perform finite element simulation calculations, thereby calculating key node parameter information of the target heat exchanger, wherein the key node parameter information includes temperature, stress and strain data.

8. A heat exchanger full-process creep-fatigue damage assessment system according to claim 6, characterized in that: In the analysis and calculation module, finite element simulation calculation is performed on the target heat exchanger to obtain key node parameter information, including: The temperature field and stress field calculations are performed on the target heat exchanger. The temperature data of the key nodes of the target heat exchanger are output through the temperature field calculation, and the stress and strain data of the key nodes of the target heat exchanger are output through the stress field calculation.

9. A heat exchanger full-process creep-fatigue damage assessment system according to claim 6, characterized in that: It also includes a data processing module, which is configured to perform lightweight processing on the thermal parameter information based on a lightweight data processing method, and make the thermal parameter information after lightweight processing meet preset accuracy requirements.

10. A heat exchanger full-process creep-fatigue damage assessment system according to claim 6, characterized in that: It also includes a visualization integration module, which is configured to perform information integration display and system control. The information integration display includes equipment operation and pre-assessment information display and system key information display.

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