Remaining use duration determination method and device, storage medium and electronic equipment

Abstract

The embodiment of the invention provides a method and device for determining the remaining use duration, a storage medium and electronic equipment, and the method comprises the steps: determining the corrosion rate of a target structure according to the current density and polarization resistance of the target structure; the residual thickness of the target structure is determined according to the corrosion rate, and the first critical thickness of the target structure is determined according to the material fracture toughness, the geometric correction factor and the nominal stress of the target structure; determining the remaining use duration of the target structure according to the remaining thickness and the first critical thickness; according to the embodiment, the problem that the remaining use duration of the structure cannot be determined in the related technology is solved.

Description

Technical Field

[0001] The present application relates to the field of wind power, and more specifically, to a method and device for determining remaining usage time, a storage medium, and an electronic device. Background Art

[0002] The multi-pile underwater foundations of offshore wind power facilities have long been eroded by the corrosive marine environment, and the superposition of fatigue effects has led to severe challenges in structural safety and operational life. How to accurately assess the health status of the structure after corrosion and scientifically plan the timing of repair has become a core issue in optimizing structural life management. Traditional detection methods, such as regular diver inspections and corrosion monitoring systems, can provide instant feedback on the status of the structure, but they are not accurate enough in judging the critical point of repair, and they rely too much on experience judgment, lacking a comprehensive and quantitative repair judgment standard.

[0003] At present, although corrosion monitoring technology can obtain corrosion indicators such as electrochemical parameters and material thickness in real time, it has not been able to effectively integrate fatigue damage assessment and stress distribution analysis to conduct in-depth comprehensive diagnosis of structural health status. In particular, in terms of corrosion rate and residual structural strength assessment, the industry still lacks mature technical solutions. In addition, the complex interaction between fatigue and stress corrosion makes the existing methods appear to be stretched when simulating and predicting the potential threat of future corrosion to structural safety. The timing of repair decisions, that is, determining the remaining service life of the structure, has become a difficult problem that the industry needs to solve urgently.

[0004] With regard to the problem in related technologies that the remaining service life of a structure cannot be determined, no effective solution has been proposed so far.

[0005] Therefore, it is necessary to improve the related technology to overcome the above-mentioned defects in the related technology. Summary of the invention

[0006] The embodiments of the present application provide a method and device for determining the remaining usage time, a storage medium, and an electronic device, so as to at least solve the problem in the related art that the remaining usage time of a structure cannot be determined.

[0007] According to one embodiment of the present application, a method for determining a remaining service life is provided, comprising: determining a corrosion rate of a target structure based on a current density and a polarization resistance of the target structure; determining a remaining thickness of the target structure based on the corrosion rate, and determining a first critical thickness of the target structure based on a material fracture toughness, a geometric correction factor, and a nominal stress of the target structure; and determining a remaining service life of the target structure based on the remaining thickness and the first critical thickness.

[0008] In an exemplary embodiment, determining a first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure includes: determining whether the target structure has a fault part; if the target structure has a fault part, determining the geometric correction factor according to the size of the fault part; if the target structure does not have a fault part, determining the geometric correction factor according to the size of the fault part, and determining the geometric correction factor to be a preset value; determining a critical size of the fault part of the target structure according to the material fracture toughness, the geometric correction factor, and the nominal stress; and determining the first critical thickness of the target structure according to the critical size.

[0009] In an exemplary embodiment, determining the critical size of the fault location of the target structure according to the material fracture toughness, the geometric correction factor, and the nominal stress includes: determining the critical size of the fault location by the following formula: Among them, a crit is the critical size, K IC is the fracture toughness of the material, Y is the geometric correction factor, and σ is the nominal stress applied;

[0010] Determining a first critical thickness of the target structure according to the critical size includes: determining the first critical thickness of the target structure by the following formula: t crit =t0-2a crit , where t crit is the first critical thickness, and t0 is the initial thickness of the target structure.

[0011] In an exemplary embodiment, determining the remaining service life of the target structure according to the remaining thickness and the first critical thickness includes: determining the remaining service life by the following formula: Among them, L res is the remaining usage time, t res is the remaining thickness, V corr is the corrosion rate, t crit is the first critical thickness.

[0012] In an exemplary embodiment, after determining the remaining thickness of the target structure according to the corrosion rate, the method further includes: determining a target formula according to a finite element analysis method, wherein the target formula is used to indicate the relationship between parameter information of the target structure and the remaining strength of the target structure, wherein the parameter information includes: initial strength, initial thickness and material strength sensitivity coefficient; determining the remaining strength of the target structure by the target formula, wherein the target formula includes: t resis the residual thickness, σ0 is the initial strength, t0 is the initial thickness, n is the material strength sensitivity coefficient, σ res is the residual strength.

[0013] In an exemplary embodiment, after determining the residual strength through the target formula, the method further includes: determining whether the residual thickness is greater than or equal to a second critical thickness, and determining whether the residual strength is greater than or equal to a second critical strength; when the residual thickness is greater than or equal to the second critical thickness, and the residual strength is greater than or equal to the second critical strength, determining that the health state of the target structure is healthy; when the residual thickness is less than the second critical thickness, and / or the residual strength is less than the second critical strength, determining whether the residual thickness is greater than or equal to a first critical thickness, and determining whether the residual strength is greater than or equal to a first critical strength, wherein the second critical thickness is greater than the first critical thickness, and the second critical strength is greater than the first critical strength; when the residual thickness is greater than or equal to the first critical thickness, and the residual strength is greater than or equal to the first critical strength, determining that the health state of the target structure is to be planned for repair; when the residual thickness is less than the first critical thickness, and the residual strength is less than the first critical strength, determining that the health state of the target structure is to be repaired.

[0014] According to another embodiment of the present application, a device for determining a remaining service life is provided, comprising: a first determination module, used to determine the corrosion rate of the target structure according to the current density and polarization resistance of the target structure; a second determination module, used to determine the remaining thickness of the target structure according to the corrosion rate, and determine the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure; and a third determination module, used to determine the remaining service life of the target structure according to the remaining thickness and the first critical thickness.

[0015] According to another embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when run.

[0016] According to another embodiment of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0017] According to another embodiment of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0018] Through the present application, the corrosion rate of the target structure is determined according to the current density and polarization resistance of the target structure; the remaining thickness of the target structure is determined according to the corrosion rate, and the first critical thickness of the target structure is determined according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure; the remaining service life of the target structure is determined according to the remaining thickness and the first critical thickness; that is, the embodiment of the present application can more accurately determine the remaining service life of the structure by combining parameters such as the current density, polarization resistance, material fracture toughness, geometric correction factor, and nominal stress of the target structure, thereby solving the problem of being unable to determine the remaining service life of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a hardware structure block diagram of a computer device of a method for determining remaining usage time in an embodiment of the present application;

[0022] Figure 2 is a flowchart of a method for determining the remaining usage time according to an embodiment of the present application;

[0023] Figure 3 It is a structural block diagram of a device for determining the remaining usage time according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0026] The method embodiments provided in the embodiments of the present application can be executed in a computer device or a similar computing device. Taking running on a computer device as an example, Figure 1 1 is a hardware structure block diagram of a computer device for determining a remaining usage time in an embodiment of the present application. Figure 1 As shown, the computer device may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the above-mentioned computer device may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above-mentioned computer device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0027] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the method for determining the remaining usage time in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0028] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the computer device. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0029] In this embodiment, a method for determining the remaining usage time is provided, which is applied to the above-mentioned computer device. Figure 2 is a flowchart of a method for determining the remaining usage time according to an embodiment of the present application. Figure 2 As shown, the process includes the following steps:

[0030] Step S202, determining the corrosion rate of the target structure according to the current density and polarization resistance of the target structure;

[0031] In step S202, the corrosion rate may be calculated using electrochemical impedance spectroscopy (EIS) technology by monitoring electrochemical signals on the structure, particularly corrosion current density and polarization resistance.

[0032] The corrosion rate can also be determined by the following formula:

[0033] Among them, V corr is the corrosion rate, in mm / year; R p is the polarization resistance, and B is the current density.

[0034] Step S204, determining the remaining thickness of the target structure according to the corrosion rate, and determining the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure;

[0035] After determining the corrosion rate, the remaining thickness at the current time point can be calculated by combining the current remaining thickness of the structure and the estimated corrosion time. At the same time, through the fracture mechanics theory, using the material fracture toughness, geometric correction factor and nominal stress, the critical strength of the structure, i.e. the first critical strength, can be calculated.

[0036] Step S206: determining the remaining service life of the target structure according to the remaining thickness and the first critical thickness.

[0037] Through the above steps, the corrosion rate of the target structure is determined according to the current density and polarization resistance of the target structure; the remaining thickness of the target structure is determined according to the corrosion rate, and the first critical thickness of the target structure is determined according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure; the remaining service life of the target structure is determined according to the remaining thickness and the first critical thickness; that is, the embodiment of the present application can more accurately determine the remaining service life of the structure by combining parameters such as the current density, polarization resistance, material fracture toughness, geometric correction factor, and nominal stress of the target structure, thereby solving the problem of being unable to determine the remaining service life of the structure.

[0038] Optionally, determining the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor and nominal stress of the target structure includes: determining whether the target structure has a fault part; if the target structure has a fault part, determining the geometric correction factor according to the size of the fault part; if the target structure does not have a fault part, determining the geometric correction factor according to the size of the fault part, and determining the geometric correction factor to be a preset value; determining the critical size of the fault part of the target structure according to the material fracture toughness, the geometric correction factor and the nominal stress; and determining the first critical thickness of the target structure according to the critical size.

[0039] The embodiment of the present application defines a method for determining the first critical thickness of a structure according to the material properties, geometric factors and stress conditions of the target structure, that is, the minimum allowable thickness of the structure to remain safe under corrosion and damage accumulation. Specifically:

[0040] First, the structure is inspected for cracks, nicks or any other type of damage. This step is done through non-destructive testing (such as ultrasonic testing, magnetic particle testing, etc.) or visual inspection.

[0041] Once a faulty part of the structure is found, such as a crack, a geometric correction factor needs to be determined based on the shape, size and location of the crack to assess the effect of the crack on the overall stress intensity factor of the structure. It is usually determined by fracture mechanics analysis or table lookup. Different crack geometries will have different geometric correction factors.

[0042] If there is no obvious fault location in the structure, the geometric correction factor can be set to a preset value representing the undamaged state. This preset value is usually based on theoretical analysis or empirical data of the material or structure.

[0043] The critical size of the fault location is determined by using the fracture toughness, geometric correction factor and nominal stress of the material; and the first critical thickness of the target structure is determined according to the critical size.

[0044] It should be noted that nominal stress refers to the ratio of the external force acting on a structural part to the cross-sectional area of ​​the structural part in engineering analysis, usually the stress under an idealized uniform stress state. It is the average stress value calculated based on the geometric dimensions of the structure and the load it bears when designing and evaluating the mechanical properties of structural parts.

[0045] In an exemplary embodiment, determining the critical size of the fault location of the target structure according to the material fracture toughness, the geometric correction factor, and the nominal stress includes: determining the critical size of the fault location by the following formula:

[0046] Among them, a crit is the critical size, K IC is the fracture toughness of the material, Y is the geometric correction factor, and σ is the nominal stress applied;

[0047] Determining a first critical thickness of the target structure according to the critical size includes: determining the first critical thickness of the target structure by the following formula: t crit =t0-2a crit , where t crit is the first critical thickness, and t0 is the initial thickness of the target structure.

[0048] In an exemplary embodiment, determining the remaining service life of the target structure according to the remaining thickness and the first critical thickness includes: determining the remaining service life by the following formula: Among them, L res is the remaining usage time, t res is the remaining thickness, V corr is the corrosion rate, t crit is the first critical thickness.

[0049] In an exemplary embodiment, after determining the remaining thickness of the target structure according to the corrosion rate, the method further includes: determining a target formula according to a finite element analysis method, wherein the target formula is used to indicate the relationship between parameter information of the target structure and the remaining strength of the target structure, wherein the parameter information includes: initial strength, initial thickness and material strength sensitivity coefficient; determining the remaining strength of the target structure by the target formula, wherein the target formula includes: t res is the residual thickness, σ0 is the initial strength, t0 is the initial thickness, n is the material strength sensitivity coefficient, σ res is the residual strength.

[0050] This application is an embodiment that details how to determine the residual strength of an offshore wind power structure under corrosion based on corrosion rate, finite element analysis (FEA) and a set of key parameters. The details are as follows:

[0051] First, the corrosion rate of the structure is obtained through electrochemical monitoring technology. Combining the current remaining thickness of the structure and the corrosion rate, the remaining thickness of the structure at the current time point can be determined.

[0052] Next, a target formula is established using the finite element analysis method. This formula is a mathematical model that describes the relationship between the parameter information of the structure and the residual strength. The parameter information includes the initial strength, initial thickness and material strength sensitivity coefficient. The initial strength and initial thickness reflect the state of the structure before corrosion, while the material strength sensitivity coefficient quantifies the sensitivity of the material strength to the change of thickness.

[0053] Once the target formula is established, it can be used to determine the residual strength of the structure.

[0054] In an exemplary embodiment, after determining the residual strength by the target formula, it also includes: determining whether the residual thickness is greater than or equal to the second critical thickness, and determining whether the residual strength is greater than or equal to the second critical strength; when the residual thickness is greater than or equal to the second critical thickness, and the residual strength is greater than or equal to the second critical strength, determining that the health state of the target structure is healthy; when the residual thickness is less than the second critical thickness, and / or the residual strength is less than the second critical strength, determining whether the residual thickness is greater than or equal to the first critical thickness, and determining whether the residual strength is greater than or equal to the first critical strength, wherein the second critical thickness is greater than the first critical thickness, and the second critical strength is greater than the first critical strength; when the residual thickness is greater than or equal to the first critical thickness, and the residual strength is greater than or equal to the first critical strength, determining that the health state of the target structure is to be planned for repair; when the residual thickness is less than the first critical thickness, and the residual strength is less than the first critical strength, determining that the health state of the target structure is to be repaired.

[0055] The embodiment of the present application sets two different critical values, namely, the first critical thickness and strength, and the second critical thickness and strength, to evaluate the health status of the offshore wind power structure in a hierarchical manner, and formulates corresponding repair decisions based on these evaluation results to ensure that the most appropriate actions are taken at different damage stages, specifically:

[0056] First, the residual thickness and residual strength of the structure are evaluated to see if they meet the second critical value of the higher safety standard. If the residual thickness is greater than or equal to the second critical thickness, and the residual strength is greater than or equal to the second critical strength, the health status of the structure is considered to be "healthy", that is, the structure does not need to be repaired immediately in its current state and can continue to operate normally.

[0057] If the residual thickness and / or residual strength of the structure is lower than the second critical value, the next step is to check whether they still meet the first critical value of the lower level. If the residual thickness is greater than or equal to the first critical thickness, and the residual strength is greater than or equal to the first critical strength, the health status of the structure is classified as "pending planned repair". That is, the damage to the structure has reached a stage that requires attention. Although it can still continue to be used, the operation and maintenance team should start planning future repair work to prevent further deterioration of the damage.

[0058] Finally, if the remaining thickness is less than the first critical thickness and the remaining strength is less than the first critical strength, the health status of the structure changes to "to be repaired". This indicates that the structure is already in a very unsafe state and immediate repair measures are required, otherwise there will be a serious risk of structural failure.

[0059] For example:

[0060] Assume that the second critical thickness of an offshore wind power pile foundation is set to 30mm and the second critical strength is 150MPa; while the first critical thickness is set to 25mm and the first critical strength is 125MPa. If, after evaluation, it is found that the remaining thickness of the structure is 28mm and the remaining strength is 160MPa, then the health status of the structure is "healthy" because the current remaining thickness and strength exceed the second critical value.

[0061] However, if the residual thickness after evaluation is 27 mm and the residual strength is 130 MPa, the structure is in the "pending planned repair" state because they meet the first critical value but can still maintain a certain bearing capacity, but the repair work needs to be planned in advance.

[0062] If the remaining thickness is only 23 mm and the remaining strength drops to 120 MPa, the health status of the structure is "pending repair" and must be repaired immediately to avoid catastrophic failure of the structure.

[0063] Through the above-mentioned graded assessment system, the operation and maintenance team can more accurately judge the health status of the structure and make timely repair decisions, which helps to optimize the maintenance plan, extend the service life of the structure, and ensure the safe operation of the facility.

[0064] In order to better understand the process of the above-mentioned method for determining the remaining usage time, the implementation method flow of the above-mentioned determination of the remaining usage time is described below in combination with an optional embodiment, but it is not used to limit the technical solution of the embodiment of the present application.

[0065] In this embodiment, a method for determining the remaining usage time is provided, which includes the following steps:

[0066] Step 1: Determine the corrosion rate;

[0067] By placing electrochemical sensors at key locations of the structure, the corrosion current density and polarization resistance are monitored in real time, and the corrosion rate is obtained using electrochemical impedance spectroscopy (EIS) technology.

[0068] The corrosion rate calculation formula is:

[0069] Among them, V corr is the corrosion rate, in mm / year; R p is the polarization resistance, and B is the current density.

[0070] Step 2: Determine the remaining thickness;

[0071] Use the following formula to calculate the remaining thickness of the structure:

[0072] t res =t0-V corr ×t, where t res is the remaining thickness, t0 is the initial thickness, V corr is the corrosion rate and t is the time.

[0073] Step 3: Determine the residual strength of the structure;

[0074] Finite element analysis (FEA) is used to simulate the stress distribution and strength of the structure in the remaining thickness after corrosion. Combining the corrosion rate and stress distribution, the following formula is used to evaluate the remaining strength of the structure:

[0075] Residual strength calculation formula:

[0076] Among them, σ res is the residual strength, σ0 is the initial strength, t res is the remaining thickness, and n is the material strength sensitivity coefficient.

[0077] Step 4: Determine the critical thickness of the structure;

[0078] The condition for crack growth to failure: When the crack grows to a certain critical length a crit When the material fails (breaks), the stress intensity factor reaches the fracture toughness of the material. The critical length calculation formula is:

[0079] Where: K IC is the fracture toughness of the material, usually measured experimentally. Y is the geometric correction factor (usually dependent on the crack location and geometry), σ is the nominal stress,

[0080] Critical thickness t crit When the crack expands to the critical length a critAssuming that the crack starts to grow from the middle of the initial thickness t0, when the crack length reaches a crit When the critical thickness t crit It can be approximated as: crit =t0-2a crit .

[0081] Step 5: Determine the remaining useful life (RUL);

[0082] The remaining service life of the structure is calculated by a joint analysis of corrosion rate and fatigue crack growth. The remaining service life evaluation formula is as follows:

[0083] Among them, L res is the remaining life, t res is the remaining thickness, t crit is the critical thickness (minimum safety thickness), V corr is the corrosion rate.

[0084] Step 6: Establish repair judgment criteria;

[0085] According to the residual thickness and residual strength of the structure, combined with the expansion of fatigue cracks, the repair judgment standard is established. The specific steps are as follows:

[0086] When the remaining thickness t res Less than the set critical thickness t crit , immediate repair is required.

[0087] When the residual strength σ res Lower than the safety strength σ saft Repairs need to be made as soon as possible.

[0088] When the remaining service life L res When it is less than the preset life threshold, repair planning is required.

[0089] The embodiment of the present application proposes a corrosion repair identification method based on corrosion rate, stress distribution and fatigue damage analysis, which uses electrochemical monitoring technology to obtain corrosion rate data, combines finite element analysis (FEA) to simulate the stress distribution of the structure, and uses the corrosion and fatigue coupling model to comprehensively evaluate the remaining strength and remaining service life (RUL) of the structure. According to the evaluation results, it is judged whether the structure needs to be repaired and the urgency of the repair.

[0090] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0091] In this embodiment, a device for determining the remaining usage time is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0092] Figure 3 is a structural block diagram of a device for determining the remaining usage time according to an embodiment of the present application, such as Figure 3 As shown, the device comprises:

[0093] A first determination module 32, configured to determine a corrosion rate of a target structure according to a current density and a polarization resistance of the target structure;

[0094] A second determination module 34 is used to determine the remaining thickness of the target structure according to the corrosion rate, and to determine the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure;

[0095] The third determination module 36 is configured to determine a remaining service life of the target structure according to the remaining thickness and the first critical thickness.

[0096] Through the above-mentioned device, the corrosion rate of the target structure is determined according to the current density and polarization resistance of the target structure; the remaining thickness of the target structure is determined according to the corrosion rate, and the first critical thickness of the target structure is determined according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure; the remaining service life of the target structure is determined according to the remaining thickness and the first critical thickness; that is, the embodiment of the present application can more accurately determine the remaining service life of the structure by combining parameters such as the current density, polarization resistance, material fracture toughness, geometric correction factor, and nominal stress of the target structure, thereby solving the problem of being unable to determine the remaining service life of the structure.

[0097] In an exemplary embodiment, the second determination module 34 is used to determine whether the target structure has a fault part; if the target structure has a fault part, determine a geometric correction factor according to the size of the fault part; if the target structure does not have a fault part, determine the geometric correction factor according to the size of the fault part, and determine the geometric correction factor to be a preset value; determine a critical size of the fault part of the target structure according to the fracture toughness of the material, the geometric correction factor, and the nominal stress; and determine a first critical thickness of the target structure according to the critical size.

[0098] In an exemplary embodiment, the second determination module 34 is used to determine the critical size of the fault location by the following formula: Among them, a crit is the critical size, K IC is the fracture toughness of the material, Y is the geometric correction factor, and σ is the nominal stress applied;

[0099] The second determination module 34 is used to determine the first critical thickness of the target structure by the following formula: crit =t0-2a crit , where t crit is the first critical thickness, and t0 is the initial thickness of the target structure.

[0100] In an exemplary embodiment, the third determination module 36 is configured to determine the remaining usage time by the following formula: Among them, L res is the remaining usage time, t res is the remaining thickness, V corr is the corrosion rate, t crit is the first critical thickness.

[0101] In an exemplary embodiment, the second determination module 34 is used to determine a target formula according to a finite element analysis method, wherein the target formula is used to indicate the relationship between parameter information of the target structure and the residual strength of the target structure, wherein the parameter information includes: initial strength, initial thickness and material strength sensitivity coefficient; the residual strength of the target structure is determined by the target formula, wherein the target formula includes: t res is the residual thickness, σ0 is the initial strength, t0 is the initial thickness, n is the material strength sensitivity coefficient, σ res is the residual strength.

[0102] In an exemplary embodiment, the second determination module 34 is used to determine whether the remaining thickness is greater than or equal to a second critical thickness, and to determine whether the remaining strength is greater than or equal to a second critical strength; when the remaining thickness is greater than or equal to the second critical thickness, and the remaining strength is greater than or equal to the second critical strength, determine that the health state of the target structure is healthy; when the remaining thickness is less than the second critical thickness, and / or the remaining strength is less than the second critical strength, determine whether the remaining thickness is greater than or equal to a first critical thickness, and determine whether the remaining strength is greater than or equal to a first critical strength, wherein the second critical thickness is greater than the first critical thickness, and the second critical strength is greater than the first critical strength; when the remaining thickness is greater than or equal to the first critical thickness, and the remaining strength is greater than or equal to the first critical strength, determine that the health state of the target structure is to be planned for repair; when the remaining thickness is less than the first critical thickness, and the remaining strength is less than the first critical strength, determine that the health state of the target structure is to be repaired.

[0103] It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0104] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0105] Optionally, in this embodiment, the storage medium may be configured to store program codes for executing the following steps:

[0106] S1, determining the corrosion rate of the target structure according to the current density and polarization resistance of the target structure;

[0107] S2, determining the remaining thickness of the target structure according to the corrosion rate, and determining the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure;

[0108] S3: Determine a remaining service life of the target structure according to the remaining thickness and the first critical thickness.

[0109] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0110] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0111] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0112] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0113] S1, determining the corrosion rate of the target structure according to the current density and polarization resistance of the target structure;

[0114] S2, determining the remaining thickness of the target structure according to the corrosion rate, and determining the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure;

[0115] S3: Determine a remaining service life of the target structure according to the remaining thickness and the first critical thickness.

[0116] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0117] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0118] An embodiment of the present application also provides a computer program, which includes computer instructions, which are stored in a computer-readable storage medium; a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps in any one of the above method embodiments.

[0119] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0120] S1, determining the corrosion rate of the target structure according to the current density and polarization resistance of the target structure;

[0121] S2, determining the remaining thickness of the target structure according to the corrosion rate, and determining the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure;

[0122] S3: Determine a remaining service life of the target structure according to the remaining thickness and the first critical thickness.

[0123] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0124] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0125] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining remaining usage time, characterized in that: include: determining a corrosion rate of the target structure based on a current density and a polarization resistance of the target structure; Determining a remaining thickness of the target structure according to the corrosion rate, and determining a first critical thickness of the target structure according to a material fracture toughness, a geometric correction factor, and a nominal stress of the target structure; The remaining service life of the target structure is determined according to the remaining thickness and the first critical thickness.

2. The method according to claim 1, characterized in that Determining a first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure includes: Determining whether the target structure has a fault location; In the case where there is a fault part in the target structure, determining a geometric correction factor according to the size of the fault part; In the case that the target structure does not have a fault part, determining a geometric correction factor according to the size of the fault part, and determining the geometric correction factor to be a preset value; Determine a critical size of a fault location of the target structure according to the material fracture toughness, the geometric correction factor, and the nominal stress; A first critical thickness of the target structure is determined according to the critical size.

3. The method according to claim 1, characterized in that Determining the critical size of the fault location of the target structure according to the material fracture toughness, the geometric correction factor, and the nominal stress includes: The critical size of the fault location is determined by the following formula: Among them, a crit is the critical size, K IC is the fracture toughness of the material, Y is the geometric correction factor, and σ is the nominal stress applied; Determining a first critical thickness of the target structure according to the critical size includes: determining the first critical thickness of the target structure by the following formula: t crit =t0-2a crit , where t crit is the first critical thickness, and t0 is the initial thickness of the target structure.

4. The method according to claim 1, characterized in that: Determining the remaining service life of the target structure according to the remaining thickness and the first critical thickness includes: The remaining usage time is determined by the following formula: Among them, L res is the remaining usage time, t res is the remaining thickness, t crit is the first critical thickness, V corr is the corrosion rate.

5. The method according to claim 1, characterized in that After determining the remaining thickness of the target structure according to the corrosion rate, the method further includes: Determine a target formula according to a finite element analysis method, wherein the target formula is used to indicate a relationship between parameter information of the target structure and a residual strength of the target structure, the parameter information including: initial strength, initial thickness and material strength sensitivity coefficient; The residual strength of the target structure is determined by a target formula, wherein the target formula includes: t res is the residual thickness, σ0 is the initial strength, t0 is the initial thickness, n is the material strength sensitivity coefficient, σ res is the residual strength.

6. The method according to claim 5, characterized in that After determining the residual strength by the target formula, the method further includes: determining whether the remaining thickness is greater than or equal to a second critical thickness, and determining whether the remaining strength is greater than or equal to a second critical strength; When the remaining thickness is greater than or equal to the second critical thickness, and the remaining strength is greater than or equal to the second critical strength, determining that the health state of the target structure is healthy; In the case where the remaining thickness is less than the second critical thickness and / or the remaining strength is less than the second critical strength, determining whether the remaining thickness is greater than or equal to the first critical thickness, and determining whether the remaining strength is greater than or equal to the first critical strength, wherein the second critical thickness is greater than the first critical thickness, and the second critical strength is greater than the first critical strength; When the remaining thickness is greater than or equal to the first critical thickness, and the remaining strength is greater than or equal to the first critical strength, determining that the health state of the target structure is to be planned for repair; When the remaining thickness is less than the first critical thickness and the remaining strength is less than the first critical strength, it is determined that the health state of the target structure is to be repaired.

7. A device for determining remaining usage time, characterized in that: include: A first determination module, configured to determine a corrosion rate of a target structure according to a current density and a polarization resistance of the target structure; A second determination module is used to determine the remaining thickness of the target structure according to the corrosion rate, and to determine the first critical thickness of the target structure according to the material fracture toughness, geometric correction factor, and nominal stress of the target structure; A third determination module is used to determine the remaining service life of the target structure according to the remaining thickness and the first critical thickness.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method of any one of claims 1 to 6 when executed.

9. An electronic device, comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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