A method, device, medium and product for evaluating the safety of a high-temperature thick-walled component of a peak-shaving power station boiler

Abstract

The application discloses a kind of safety evaluation method, equipment, medium and product of high-temperature thick-walled component of peak-shaving power station boiler, relate to the field of safety evaluation of power station boiler component, the method includes according to the historical operation condition data of high-temperature thick-walled component of peak-shaving power station boiler, determine multiple stress cycle conditions and examination points;According to the condition data corresponding to each stress cycle condition and examination point determines low-cycle fatigue life loss rate and creep life loss rate;The low-cycle fatigue life loss rate corresponding to all stress cycle conditions is accumulated, and total low-cycle fatigue life loss rate is obtained;The creep life loss rate corresponding to all stress cycle conditions is accumulated, and total creep life loss rate is obtained;The safety of high-temperature thick-walled component is evaluated based on total low-cycle fatigue life loss rate and total creep life loss rate.The application can improve the efficiency and precision of safety evaluation of high-temperature thick-walled component of peak-shaving power station boiler.

Description

Technical Field

[0001] This application relates to the field of safety evaluation of power plant boiler components, and in particular to a method, equipment, medium and product for safety evaluation of high-temperature thick-walled components of peak-shaving power plant boilers. Background Technology

[0002] Power plant boilers, as a crucial component of thermal power generating units, are vital infrastructure for power supply. During operation, all components of power plant boilers are subjected to high temperatures and high pressures. Under the new power system framework, coal-fired power units generally participate in peak-shaving operations. During peak-shaving and flexible operation of these units, boiler components are subjected to thermal stress and internal pressure stress caused by temperature and pressure changes. These cyclically changing loads lead to fatigue damage in boiler components, primarily low-cycle fatigue damage. The operating temperatures of thick-walled components such as high-temperature headers and pipes in power plant boilers often exceed the creep temperature limits of the materials, and creep damage also occurs with increasing service time. Low-cycle fatigue and creep damage are the main damage modes of high-temperature thick-walled components in power plant boilers during peak-shaving operations.

[0003] The frequent deep peak shaving and rapid load increase / decrease operation of thermal power units urgently require strengthened safety management of high-temperature thick-walled components of boilers. The safety evaluation of high-temperature thick-walled components of boilers involves the calculation of low-cycle fatigue life loss and creep life loss. At present, there is no calculation, evaluation method or calculation medium in the industry for the remaining life of low-cycle fatigue coupled creep loss of high-temperature thick-walled components of power plant boilers. Summary of the Invention

[0004] The purpose of this application is to provide a method, equipment, medium, and product for safety evaluation of high-temperature thick-walled components of peak-shaving power plant boilers, which can improve the efficiency and accuracy of safety evaluation of high-temperature thick-walled components of peak-shaving power plant boilers.

[0005] To achieve the above objectives, this application provides the following solution: Firstly, this application provides a safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler, the method comprising: Based on historical operating data of high-temperature thick-walled components of peak-shaving power plant boilers, multiple stress cycle conditions and assessment points were determined. The low-cycle fatigue life loss rate is determined based on the working condition data corresponding to each stress cycle condition and the test point; and the low-cycle fatigue life loss rate corresponding to all stress cycle conditions is summed to obtain the total low-cycle fatigue life loss rate. The creep life loss rate is determined based on the working condition data corresponding to each stress cycle condition and the test point; and the creep life loss rate corresponding to all stress cycle conditions is summed to obtain the total creep life loss rate. The safety of high-temperature thick-walled components is evaluated based on the total low-cycle fatigue life loss rate and the total creep life loss rate.

[0006] Optionally, the operating condition data includes: stress concentration factor at the test point, inner diameter and effective thickness of boiler components at the test point, thermal conductivity of the material, temperature damping coefficient, specific heat at constant pressure, material density, pressure, and temperature operating condition changes.

[0007] Optionally, determining the low-cycle fatigue life loss rate based on the working condition data corresponding to each stress cycle condition and the test point specifically includes: Determine the corresponding internal pressure stress and thermal stress based on the working condition data corresponding to the assessment points; The stress amplitude is determined based on the internal compressive stress and thermal stress at the assessment point. The stress amplitude at the test point is corrected by using the set design fatigue curve and the elastic modulus to obtain the corrected stress amplitude. Based on the corrected stress amplitude and the set design fatigue curve, determine the allowable number of cycles for the corresponding working condition; The ratio of the actual number of cycles to the allowed number of cycles corresponding to the assessment points is used to obtain the corresponding low-cycle fatigue life loss rate.

[0008] Optionally, the step of correcting the stress amplitude at the test point using a set design fatigue curve combined with the elastic modulus to obtain the corrected stress amplitude specifically includes: Using formula Determine the corrected stress amplitude ; in, The material elastic modulus is used to set the design fatigue curve. To calculate the elastic modulus at the highest wall temperature under stress cyclic conditions, This represents the stress amplitude.

[0009] Optionally, determining the creep life loss rate based on the operating data corresponding to each stress cycle condition and the test point specifically includes: Curve fitting was performed on the working condition data corresponding to the assessment points to obtain the stress-creep fracture time curve; Based on the stress-creep fracture time curve, the allowable creep fracture time under different stress and temperature conditions is determined; The creep life loss rate corresponding to the test point is obtained by comparing the component running time with the allowable creep failure time for each stress cycle condition.

[0010] Optionally, the step of performing curve fitting on the working condition data corresponding to the assessment point to obtain the stress-creep fracture time curve specifically includes: Using formula Determine the stress-creep fracture time curve; in, It is a logarithmic function with base 10. The creep rupture time. For the test temperature, To correspond to the allowable stress of the material at the corresponding temperature, , , , , , All are constants.

[0011] Optionally, the evaluation of the safety of high-temperature thick-walled components based on total low-cycle fatigue life loss rate and total creep life loss rate specifically includes: The remaining lifespan of high-temperature thick-walled components in peak-shaving power plant boilers is determined based on the total low-cycle fatigue life loss rate and the total creep life loss rate. The safety of the high-temperature thick-walled component is evaluated based on its remaining lifespan.

[0012] Secondly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler.

[0013] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler.

[0014] Fourthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler.

[0015] According to the specific embodiments provided in this application, this application has the following technical effects: This application provides a method, equipment, medium, and product for safety evaluation of high-temperature thick-walled components of peak-shaving power plant boilers. By determining the low-cycle fatigue life loss rate and creep life loss rate of these components based on the operating data corresponding to each stress cycle and assessment point, the application more accurately and comprehensively reflects the actual life loss of these components during operation. Based on the actual life loss, targeted data references are provided for the safety management of high-temperature thick-walled components in peak-shaving power plant boilers, providing a scientific basis for extending the service life of boiler components, reducing maintenance costs, and ensuring safe boiler operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating a safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler according to an embodiment of this application. Figure 2 Schematic diagram of the process for determining the low-cycle fatigue life loss rate. Figure 3 A schematic diagram of the process for determining creep life loss rate. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In one exemplary embodiment, such as Figure 1 As shown, a safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler is provided, comprising the following steps S101 to S104: Wherein: S101. Based on the historical operating data (temperature, pressure) of high-temperature thick-walled components of peak-shaving power plant boilers, determine multiple stress cycle conditions and assessment points. The assessment points are located at openings, bridges, and other structural discontinuities or stress concentrations in the shell. Based on the structural conditions of the assessment points, the stress concentration factor of the assessment points is determined using the recommended values ​​in Appendix A of GB / T16507.4. S102, determine the low-cycle fatigue life loss rate based on the working condition data corresponding to each stress cycle condition and the test point; and sum up the low-cycle fatigue life loss rates corresponding to all stress cycle conditions to obtain the total low-cycle fatigue life loss rate; the working condition data includes: stress concentration factor at the test point, inner diameter and effective thickness of boiler components at the test point, thermal conductivity of materials, temperature damping coefficient, specific heat at constant pressure, material density, pressure and temperature working condition changes.

[0021] like Figure 2 As shown, S102 specifically includes: S21, determine the corresponding internal pressure stress and thermal stress based on the working condition data corresponding to the assessment point; S21 specifically includes: Step 1: Conduct temperature field analysis on the assessment points. The high-temperature thick-walled components of the power plant boiler are all insulated and are almost in an adiabatic state with the environment. The thermal stress is mainly radial temperature difference stress and circumferential temperature difference stress.

[0022] The radial temperature difference between the inner and outer walls is given by the formula Perform the calculation.

[0023] In the formula, , These are the outer and inner wall temperatures (°C), respectively. δ is the structural coefficient for the radial inner and outer wall thickness difference; δ is the thickness of the component used (mm); υ is the rate of change of medium temperature (℃ / min). η is the time taken for the boiler medium temperature to rise (fall) at a rate υ, in minutes; η is the temperature damping coefficient; τ is the time constant, in minutes. ;a is the thermal conductivity of the cylinder material, , e is the base of the natural logarithm; λ is the thermal conductivity of the material. ; For the specific heat at constant pressure of the material, ρ is the material density. .

[0024] Step 2, the internal pressure membrane stress at the component assessment point is determined by the formula The calculations are performed, and the three principal stress components caused by the internal pressure at the assessment point are calculated using the following formulas: Circumferential stress components: ; Axial stress components: ; Normal stress components: ; In the formula, For the inner diameter of the component, The effective wall thickness of the component is in mm. The highest and lowest working pressures (MPa) of the working fluid at the test point of the component under given stress cycle conditions; , , These represent the circumferential, axial, and normal stress components caused by internal pressure, in MPa. , , These are the stress concentration factors for the circumferential, axial, and normal stresses caused by internal pressure, respectively, and their values ​​are 3.1, -0.2, and ... .

[0025] Step 2: Calculate the radial thermal stress at the test point. Based on the analysis above, the three principal stress components caused by the radial temperature difference between the inner and outer walls can be calculated using the following formulas: Circumferential thermal stress ; Axial thermal stress ; Normal thermal stress ; In the formula, , , These represent the circumferential, axial, and normal stress components caused by the radial and inner wall temperature differences, respectively, in MPa; α is the coefficient of linear expansion of the component material. E is the elastic modulus of the component material, in MPa; μ is the Poisson's ratio of the component material, taken as 0.3; f is the structural coefficient, calculated by formula A.3 of GB / T16507.4.

[0026] Step 3: Calculate the circumferential thermal stress at the test point. The three principal stress components caused by the circumferential wall temperature difference can be calculated using the following formulas: Circumferential thermal stress ; Axial thermal stress ; Normal thermal stress ; In the formula, , , These represent the circumferential, axial, and normal stress components caused by the temperature difference of the circumferential wall, in MPa. is the circumferential thermal stress concentration factor caused by circumferential temperature difference, with a recommended value of -1; E is the elastic modulus of the component material, in MPa. The maximum circumferential wall temperature difference is expressed in °C.

[0027] Step 4, Stress Synthesis and Calculation: The combined principal stresses caused by internal pressure and temperature difference are calculated using the following formulas: ; ; ; Step 5: Calculate the principal stress difference for the peak and trough values ​​of each stress cycle. The peak principal stress difference is calculated using the following formulas: ; ; ; The principal stress difference is calculated using the following formulas: ; ; ; Step 6, Calculation of the principal stress difference fluctuation range, is performed using the following formulas: ; ; ; S22, determine the stress amplitude based on the internal compressive stress and thermal stress at the test point; Calculate the range of alternating stress Stress amplitude : ； ； S23, the stress amplitude at the test point is corrected by combining the set design fatigue curve with the elastic modulus to obtain the corrected stress amplitude; the set design fatigue curve is obtained from standard documents such as Appendix A of GB / T16507.4 and Appendix B of DL / T654 or material manuals; Using formula Determine the corrected stress amplitude ; in, The material elastic modulus is used to set the design fatigue curve. The elastic modulus is calculated under the highest wall temperature in the stress cycle calculation.

[0028] S24. Based on the corrected stress amplitude and the set design fatigue curve, determine the allowable number of cycles for the corresponding working condition. S25, the ratio of the actual number of cycles to the allowable number of cycles obtained from the assessment points is used to obtain the corresponding low-cycle fatigue life loss rate.

[0029] Depend on Obtain the corrected stress amplitude for the stress cycle calculation condition, find the corresponding allowable number of cycles N on the set design fatigue curve, and then perform the selected stress cycle calculation condition. The low-cycle fatigue life damage rate under the corresponding stress cyclic conditions was calculated. Using the cumulative damage safety criterion, the sum of low-cycle fatigue life damage rates for all selected stress cycle conditions was calculated. : ; S103, determine the creep life loss rate based on the working condition data corresponding to each stress cycle condition and the test point; and sum up the creep life loss rates corresponding to all stress cycle conditions to obtain the total creep life loss rate. like Figure 3 As shown, S103 specifically includes: S31, Perform curve fitting on the working condition data corresponding to the test point to obtain the stress-creep fracture time curve; where the working condition data here includes: the metal material constant, temperature and stress value of the test point. Component materials LM The parameter is a combination of time and temperature, with thermal intensity as the primary parameter. This means, that is: .

[0030] In the formula, The creep rupture time. h ; For the test temperature, K ; C These are material constants, which can be found in the relevant material handbook or standard.

[0031] By consulting relevant material handbooks or standards, such as ASME material standards and DL / T654 standards, stress-fracture time curves of the component's metallic material or materials with similar properties at different temperatures are obtained. Through plotting and point selection of the curves, the curves are ultimately fitted to obtain... , , polynomials: ; in, It is a logarithmic function with base 10. The creep rupture time. h , For the test temperature, K , The allowable stress of the material at the corresponding temperature, in MPa. , , , , , All are constants.

[0032] Six points were selected from the stress-fracture time curve and substituted into the above... , , By using polynomials, we obtain the corresponding values ​​of temperature, stress, and creep rupture time, and then obtain six unknown constants. , , , , , The system of equations is formed, and the constants are found by solving the system of equations. , , , , , To obtain the six constants , , The polynomial, and then based on the obtained polynomial , , Find the third quantity from any two quantities in the given set. S32, Based on the stress-creep fracture time curve, determine the allowable creep fracture time under different stress and temperature conditions. ; S33, the creep life loss rate corresponding to the test point is obtained by comparing the component running time corresponding to each stress cycle condition with the allowable creep failure time. That is, from the formula Seek i Stress Cyclic Correspondence Creep life loss rate during runtime (h); Using the cumulative damage safety criterion, the sum of creep life damage rates for all selected stress cycle conditions was calculated. : ; In the formula, In order to be in i Operating time of components under stress cycling conditions h ; In order to be in i Creep failure time of materials under stress cyclic conditions h .

[0033] S104 evaluates the safety of high-temperature thick-walled components based on total low-cycle fatigue life loss rate and total creep life loss rate.

[0034] S104 specifically includes: S41, Determine the remaining lifespan of high-temperature thick-walled components in peak-shaving power plant boilers based on the total low-cycle fatigue life loss rate and the total creep life loss rate. S42, Evaluate the safety of the high-temperature thick-walled component based on the remaining lifespan.

[0035] The remaining lifespan of components is estimated based on the total low-cycle fatigue life loss rate and the total creep life loss rate, combined with the cumulative operating time of the corresponding components; based on the remaining lifespan, safe usage recommendations for high-temperature thick-walled components of peak-shaving power plant boilers are given.

[0036] The safety recommendations mainly include replacing components before the remaining service life expires, strengthening operational monitoring, and taking necessary testing measures.

[0037] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal. The computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is connected to the system bus via the I / O interfaces. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The I / O interfaces of the computer device are used for exchanging information between the processor and external devices. The communication interface of the computer device is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler.

[0038] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor specifically includes: The data input module allows users to input the required parameters for the life loss calculation based on the object being calculated. These parameters can be imported in batches using the accompanying data input file. The stress cycle calculation and extraction module extracts operating condition parameters such as operating temperature and pressure of the life loss calculation object from the historical operating data of the boiler unit, and completes the stress cycle calculation and selection based on the operating condition parameters; The lifespan attrition rate calculation module is used for the first... i Each cyclic stress amplitude is used to calculate the low-cycle fatigue life loss rate and creep life loss rate, and the low-cycle fatigue life loss rate and creep life loss rate of multiple cyclic stress amplitudes can be summed.

[0039] By completing data input, stress cycle calculation, extraction, and life loss rate calculation through corresponding modules, the system can achieve programmed operation, obtain a relatively accurate life loss rate of high-temperature thick-walled components of power plant boilers, and output prompts. Boiler users can take targeted inspection and maintenance plans based on the calculated life loss rate, thereby improving the safety management level of high-temperature thick-walled components of power plant boilers.

[0040] This application, based on the material, specifications, and structural characteristics of high-temperature thick-walled components in peak-shaving power plant boilers, and historical operating data of the boiler units, combined with relevant technical principles, proposes that the life loss of these components is composed of low-cycle fatigue life loss coupled with creep life loss, thus more accurately and comprehensively reflecting the actual life loss of these components during operation. By converting the calculation of low-cycle fatigue life loss rate and creep fatigue life loss rate of these components into a computer program, this application transforms the calculation of these complex calculations into a computer program, improving both the speed and accuracy of computation. The calculated results of low-cycle fatigue life loss rate and creep life loss rate can provide targeted data references for the safety management of high-temperature thick-walled components in peak-shaving power plant boilers, providing a scientific basis for extending the service life of boiler components, reducing maintenance costs, and ensuring safe boiler operation.

[0041] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0042] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0043] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0044] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0045] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0046] In this application, all actions to acquire signals, information, or data are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with the authorization granted by the owner of the relevant device.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler, characterized in that, The safety evaluation method for the high-temperature thick-walled components of the peak-shaving power plant boiler includes: Based on historical operating data of high-temperature thick-walled components of peak-shaving power plant boilers, multiple stress cycle conditions and assessment points were determined. The low-cycle fatigue life loss rate is determined based on the working condition data corresponding to each stress cycle condition and the test point; and the low-cycle fatigue life loss rate corresponding to all stress cycle conditions is summed to obtain the total low-cycle fatigue life loss rate. The creep life loss rate is determined based on the working condition data corresponding to each stress cycle condition and the test point; and the creep life loss rate corresponding to all stress cycle conditions is summed to obtain the total creep life loss rate. The safety of high-temperature thick-walled components is evaluated based on the total low-cycle fatigue life loss rate and the total creep life loss rate.

2. The safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler according to claim 1, characterized in that, The operating condition data includes: stress concentration factor at the test point, inner diameter and effective thickness of boiler components at the test point, thermal conductivity of the material, temperature damping coefficient, specific heat at constant pressure, material density, pressure, and temperature changes.

3. The safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler according to claim 1, characterized in that, The determination of the low-cycle fatigue life loss rate based on the working condition data corresponding to each stress cycle and the test point specifically includes: Determine the corresponding internal pressure stress and thermal stress based on the working condition data corresponding to the assessment points; The stress amplitude is determined based on the internal compressive stress and thermal stress at the assessment point. The stress amplitude at the test point is corrected by using the set design fatigue curve and the elastic modulus to obtain the corrected stress amplitude. Based on the corrected stress amplitude and the set design fatigue curve, determine the allowable number of cycles for the corresponding working condition; The ratio of the actual number of cycles to the allowed number of cycles corresponding to the assessment points is used to obtain the corresponding low-cycle fatigue life loss rate.

4. The safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler according to claim 3, characterized in that, The process of correcting the stress amplitude at the test point using a pre-defined design fatigue curve and elastic modulus to obtain the corrected stress amplitude specifically includes: Using formula Determine the corrected stress amplitude ; in, The material elastic modulus is used to set the design fatigue curve. To calculate the elastic modulus at the highest wall temperature under stress cyclic conditions, This represents the stress amplitude.

5. The safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler according to claim 1, characterized in that, The determination of creep life loss rate based on the operating data corresponding to each stress cycle condition and the assessment point specifically includes: Curve fitting was performed on the working condition data corresponding to the assessment points to obtain the stress-creep fracture time curve; Based on the stress-creep fracture time curve, the allowable creep fracture time under different stress and temperature conditions is determined; The creep life loss rate corresponding to the test point is obtained by comparing the component running time with the allowable creep failure time for each stress cycle condition.

6. The safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler according to claim 5, characterized in that, The step of performing curve fitting on the working condition data corresponding to the assessment points to obtain the stress-creep fracture time curve specifically includes: Using formula Determine the stress-creep fracture time curve; in, It is a logarithmic function with base 10. The creep rupture time. For the test temperature, To correspond to the allowable stress of the material at the corresponding temperature, , , , , , All are constants.

7. The safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler according to claim 1, characterized in that, The evaluation of the safety of high-temperature thick-walled components based on total low-cycle fatigue life loss rate and total creep life loss rate specifically includes: The remaining lifespan of high-temperature thick-walled components in peak-shaving power plant boilers is determined based on the total low-cycle fatigue life loss rate and the total creep life loss rate. The safety of the high-temperature thick-walled component is evaluated based on its remaining lifespan.

8. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler as described in any one of claims 1-7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler as described in any one of claims 1-7.

10. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the safety evaluation method for high-temperature thick-walled components of a peak-shaving power plant boiler as described in any one of claims 1-7.

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