Portal crane whole machine life estimation method and related device

Abstract

The invention discloses a gantry crane whole machine life estimation method and a related device, and relates to the technical field of gantry cranes, the method comprises the following steps: obtaining known conditions of a gantry crane; the known conditions comprise the maximum rated lifting capacity of the gantry crane, the total lifting weight of a certain working period and the total working cycle times; determining an objective function and constraint conditions based on the known conditions; solving the objective function to obtain a minimum value of the objective function and a maximum value of the objective function; based on the minimum value of the objective function and the maximum value of the objective function, the number of equivalent full-load working cycles of the whole machine is determined; and determining the residual life of the gantry crane based on the equivalent full-load working cycle index of the whole machine, the working level of the gantry crane and the specified crane full-load working cycle index. The technical problem of estimating the residual life of the gantry crane can be solved.

Description

Technical Field

[0001] This application relates to the technical field of portal cranes, and particularly to a method for estimating the overall life of a portal crane and related devices. Background Art

[0002] In the related art, the current damage condition and the estimated remaining life of a portal crane can be determined by calculating based on the methods in relevant standards and specifications. However, due to the very complex usage of portal cranes, it is generally impossible to record the weight of each lift under various working conditions. The error between the result obtained only by relevant methods and the damage of the actual usage of the equipment is relatively large, which will lead to a low credibility of the estimated result of the remaining life of the crane. Therefore, there is still a technical problem of lacking a reliable method for estimating the remaining life of portal cranes.

[0003] Regarding the technical problem of estimating the remaining life of portal cranes in the above related art, no effective solution has been proposed yet. Summary of the Invention

[0004] The purpose of this application is to provide a method for estimating the overall life of a portal crane and related devices, which can realize the estimation of the remaining life of a portal crane.

[0005] To achieve the above purpose, the following solutions are provided in this application.

[0006] In the first aspect, this application provides a method for estimating the overall life of a portal crane. The method for estimating the overall life of a portal crane includes the following steps.

[0007] Obtain the known conditions of the portal crane; the known conditions include: the maximum rated lifting capacity of the portal crane, the total lifting weight in a certain working cycle, and the total number of working cycles.

[0008] Based on the known conditions, determine the objective function and the constraint conditions.

[0009] Solve the objective function to obtain the minimum value and the maximum value of the objective function.

[0010] Based on the minimum value and the maximum value of the objective function, determine the equivalent full-load working cycle number of the whole machine.

[0011] Based on the equivalent full-load working cycle number of the whole machine, the working level of the portal crane, and the specified full-load working cycle number of the crane, determine the remaining life of the portal crane.

[0012] Optionally, the expressions of the objective function and the constraint conditions are as follows.

[0013] .

[0014] 。

[0015] 。

[0016] 。

[0017] Among them, is the objective function; is the actual lifting load for each working cycle of the portal crane; is the total number of working cycles that the portal crane has undergone; is the maximum rated lifting load of the portal crane; is the total lifting weight of the portal crane in a certain working period.

[0018] Optionally, solve the objective function to obtain the minimum value of the objective function, which specifically includes the following steps.

[0019] Construct the Lagrangian function.

[0020] Solve the Lagrangian function to obtain the minimum value of the objective function.

[0021] Optionally, the expression of the Lagrangian function is as follows.

[0022] 。

[0023] Among them, is the Lagrangian function; is the Lagrange multiplier; is the actual lifting load for each working cycle of the portal crane; is the total number of working cycles that the portal crane has undergone; is the total lifting weight of the portal crane in a certain working period.

[0024] Optionally, the formula for solving the Lagrangian function is as follows.

[0025] 。

[0026] 。

[0027] 。

[0028] Among them, is the Lagrangian function; is the Lagrange multiplier; is the actual lifting load for each working cycle of the portal crane; is the total number of working cycles that the portal crane has undergone; It is the total lifting weight of the portal crane for a certain working cycle.

[0029] Optionally, solve the objective function to obtain the maximum value of the objective function, which specifically includes the following steps.

[0030] When the total number of working cycles that have occurred for the portal crane is 2, calculate the maximum value of the objective function.

[0031] When the total number of working cycles that have occurred for the portal crane is greater than 2, determine the generalized formula according to the formula for calculating the maximum value of the objective function when the total number of working cycles that have occurred for the portal crane is 2.

[0032] Based on the generalized formula, determine the maximum value of the objective function.

[0033] Optionally, the expression of the generalized formula is as follows.

[0034] .

[0035] .

[0036] .

[0037] Among them, is the maximum rated lifting load of the portal crane; is the actual lifting load of each working cycle of the portal crane; is an intermediate variable; is the first given value, is an integer and ; is the second given value; is the largest integer not greater than a certain number.

[0038] In a second aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the portal crane whole-machine life estimation method described in any one of the above.

[0039] In a third aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the portal crane whole-machine life estimation method described in any one of the above.

[0040] In a fourth aspect, the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the portal crane whole-machine life estimation method described in any one of the above.

[0041] According to the specific embodiments provided in the present application, the following technical effects are disclosed in the present application.

[0042] The present application provides a method for estimating the overall life of a portal crane and related devices. First, known conditions of the portal crane are obtained; the known conditions include: the maximum rated lifting capacity of the portal crane, the total lifting weight and the total number of working cycles in a certain working period; this can ensure the accuracy of the relevant parameters of the portal crane, thus guaranteeing the scientificity and accuracy of subsequent steps, avoiding a series of misjudgments caused by incorrect initial data, and laying a solid foundation for accurately determining the remaining life of the crane. Secondly, based on the known conditions, an objective function and constraint conditions are determined; the objective function is solved to obtain the minimum value and the maximum value of the objective function; by determining the objective function and constraint conditions, the core of the problem to be solved can be clarified, providing a clear direction and boundary for the subsequent solution process; after obtaining the minimum value and the maximum value of the objective function, the possible value range of the objective function under the given conditions can be comprehensively understood, providing key data support for subsequent determination of the equivalent full-load working cycle number of the whole machine, and helping to more accurately evaluate the working state and performance of the crane. Then, based on the minimum value and the maximum value of the objective function, the equivalent full-load working cycle number of the whole machine is determined; this can transform the actual complex and changeable working conditions into a relatively simple and unified measurement standard, facilitating the quantitative evaluation of the workload and wear degree of the portal crane, and providing an index that is easy to compare and analyze for subsequent determination of the remaining life. Finally, based on the equivalent full-load working cycle number of the whole machine, the working level of the portal crane and the specified full-load working cycle number of the crane, the remaining life of the portal crane can be accurately determined. On the one hand, it can help users reasonably arrange the use plan and maintenance strategy of the portal crane, avoiding equipment failures and even accidents caused by overuse; on the other hand, it can also provide a scientific basis for the renovation and transformation of the portal crane, improving the economic benefits and safety of equipment management and operation, and ensuring the reliable operation of the portal crane throughout its life cycle. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0044] Figure 1 It is an application environment diagram of a method for estimating the overall life of a portal crane in an embodiment of the present application.

[0045] Figure 2Schematic flow chart of a method for estimating the overall life of a portal crane provided by an embodiment of the present application.

[0046] Figure 3 Schematic structural diagram of a computer device provided by an embodiment of the present application. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0048] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0049] The method for estimating the overall life of a portal crane provided by the embodiments of the present application can be applied to an application environment as Figure 1 shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be set up separately, integrated on the server 104, placed in the cloud or on other servers. The terminal 102 can send the known conditions of the portal crane to the server 104. The known conditions include: the maximum rated lifting capacity of the portal crane, the total lifting weight and the total number of working cycles in a certain working cycle; after receiving the known conditions, the server 104 determines the objective function and the constraint conditions based on the known conditions; solves the objective function to obtain the minimum value and the maximum value of the objective function; determines the equivalent full-load working cycle number of the whole machine based on the minimum value and the maximum value of the objective function; determines the remaining life of the portal crane based on the equivalent full-load working cycle number of the whole machine, the working level of the portal crane, and the specified full-load working cycle number of the crane. The server 104 can feedback the obtained remaining life of the portal crane to the terminal 102. In addition, in some embodiments, the method for estimating the overall life of a portal crane can also be implemented by the server 104 or the terminal 102 alone. For example, the terminal 102 can directly estimate the overall life of the portal crane for the known conditions of the portal crane, or the server 104 can obtain the known conditions of the portal crane from the data storage system and estimate the overall life of the portal crane for the known conditions of the portal crane.

[0050] Among them, the terminal 102 can be, but is not limited to, various desktop computers, laptop computers, smart phones, and tablet computers. The server 104 can be implemented by an independent server or a server cluster composed of multiple servers, and can also be a cloud server.

[0051] In an exemplary embodiment, as Figure 2 shown, a method for estimating the overall life of a portal crane is provided. This method is executed by a computer device, and specifically can be executed alone by a computer device such as a terminal or a server, or can be jointly executed by a terminal and a server. In the embodiments of the present application, taking this method applied to Figure 1 the server 104 in it as an example for illustration, it includes the following steps S1 to S5.

[0052] S1: Obtain the known conditions of the portal crane; the known conditions include: the maximum rated lifting capacity of the portal crane, the total lifting weight in a certain working cycle, and the total number of working cycles.

[0053] S2: Based on the known conditions, determine the objective function and the constraint conditions.

[0054] S3: Solve the objective function to obtain the minimum value and the maximum value of the objective function.

[0055] S4: Based on the minimum value and the maximum value of the objective function, determine the equivalent full-load working cycle number of the whole machine.

[0056] S5: Based on the equivalent full-load working cycle number of the whole machine, the working level of the portal crane, and the specified full-load working cycle number of the crane, determine the remaining life of the portal crane.

[0057] Implementing the above steps S1 to S5 can determine the lower limit and the upper limit of the damage degree of the portal crane in a certain working cycle according to relevant information such as the total lifting weight and the number of working cycles in a working cycle. Further, determine the current total damage situation of the portal crane and predict the remaining life.

[0058] When the lifting weight and the number of lifts of the portal crane each time are known, the equivalent full-load working cycle number of the whole machine is estimated according to formula (1).

[0059] (1).

[0060] Among them, is the equivalent full-load working cycle number of the crane; is the amplification factor, considering the uncertainty of the actual working load record and estimation of the crane; is the actual lifting load in each working cycle of the portal crane; is the total number of working cycles that have occurred for the portal crane; is the maximum rated lifting load of the portal crane.

[0061] Due to the complex working conditions of the portal crane, the types of goods lifted and the weight of each lift are not fixed. Generally, only the total weight of the goods lifted and the total number of working cycles in a certain working period can be given. In this way, it is impossible to directly estimate the equivalent full-load working cycle times according to formula (1).

[0062] In the case where direct estimation is not possible, consider calculating the range of equivalent full-load working cycle times based on limited working data, and give the upper and lower limits of the times as a reference to estimate the remaining life of the portal crane. The specific method is as follows.

[0063] Given a portal crane with a maximum rated lifting load of tons, the total weight of the goods lifted in a certain working period tons, and the total number of working cycles times that have occurred for the portal crane, estimating the upper and lower limits of the equivalent full-load working cycle times for this working period can be transformed into a conditional extreme value problem.

[0064] Let the actual lifting load of each working cycle be tons, .

[0065] The expressions of the objective function and the constraint conditions are as follows.

[0066] (2).

[0067] (3).

[0068] (4).

[0069] (5).

[0070] Among them, is the objective function, that is, to find the extreme value of .

[0071] As an optional implementation manner, in step S3, the objective function is solved to obtain the minimum value of the objective function, which specifically includes the following steps.

[0072] A1: Construct the Lagrangian function.

[0073] A2: Solve the Lagrangian function to obtain the minimum value of the objective function.

[0074] Specifically, introduce the Lagrange multiplier , and construct the Lagrangian function.

[0075] (6).

[0076] Among them, is the Lagrangian function.

[0077] For and taking partial derivatives gives the following system of equations.

[0078] (7).

[0079] Solving the above system of equations gives .

[0080] (8).

[0081] That is, when the average value of the lifting capacity is taken each time, the objective function takes an extreme value. Obviously, this extreme value is the minimum value of the objective function. That is, the following equation holds.

[0082] (9).

[0083] As an alternative implementation, in step S3, the objective function is solved to obtain the maximum value of the objective function, which specifically includes the following steps.

[0084] B1: When the total number of working cycles that the portal crane has undergone is 2, calculate the maximum value of the objective function.

[0085] B2: When the total number of working cycles that the portal crane has undergone is greater than 2, determine the generalization formula according to the formula for calculating the maximum value of the objective function when the total number of working cycles that the portal crane has undergone is 2.

[0086] B3: Based on the generalization formula, determine the maximum value of the objective function.

[0087] Specifically, the discussion is carried out in three steps.

[0088] a. When , there is .

[0089] Let , then the following formula holds.

[0090] (10).

[0091] (11).

[0092] Combining formula (10) and formula (11), the following formula can be obtained.

[0093] (12).

[0094] b. When , referring to formula (12), it is extended to assume that the following formula holds.

[0095] (13).

[0096] Wherein, ; is the first given value, is an integer and , is the second given value; .

[0097] and The calculation formulas are as follows.

[0098] (14).

[0099] (15).

[0100] Wherein, is the largest integer not greater than a certain number.

[0101] c. Then when , there exists such that .

[0102] When , the following formula holds.

[0103] (16).

[0104] When , the following formula holds.

[0105] (17).

[0106] Combining formula (16) and formula (17), the maximum value of the objective function is , that is, the following formula holds.

[0107] (18).

[0108] Wherein, , .

[0109] Then the upper and lower limits of the equivalent full-load working cycle times of the crane in this working cycle are as follows.

[0110] , .

[0111] The present application also provides an application scenario, which applies the above-mentioned method for estimating the overall service life of a portal crane. Specifically: The method for estimating the overall service life of a portal crane provided in this embodiment can be applied to the scenario of estimating the overall service life of a portal crane. The scenario of estimating the overall service life of a portal crane includes: a data acquisition link, a link for determining the objective function and constraints, a solution link, a link for determining the equivalent full-load working cycle times of the whole machine, and a link for determining the remaining service life of the portal crane. First, obtain the known conditions of the portal crane; the known conditions include: the maximum rated lifting capacity of the portal crane, the total lifting weight and the total number of working cycles in a certain working period; secondly, based on the known conditions, determine the objective function and constraints; solve the objective function to obtain the minimum value and the maximum value of the objective function; then, based on the minimum value and the maximum value of the objective function, determine the equivalent full-load working cycle times of the whole machine; finally, based on the equivalent full-load working cycle times of the whole machine, the working level of the portal crane and the specified full-load working cycle times of the crane, determine the remaining service life of the portal crane.

[0112] The following is illustrated by a specific evaluation case.

[0113] A certain portal crane was manufactured in 1991, with a model of 12t / 30m, a self-weight of about 260 tons, and a designed service life of 15 years. The relevant operation information is shown in Table 1.

[0114] Table 1 Statistical Work Records

[0115] (1) The design life of the portal crane.

[0116] The design life is determined during the design of the hoisting machinery, is related to the load state level and the working level, and should be provided by the manufacturing unit. According to the provisions of GB / T20863.1-2021, when the working level A of the crane is known, the design calculation should be carried out according to the full-load working cycle times of the crane specified in Table 2. Carry out the design calculation.

[0117] Table 2 Design Values Based on Working Levels

[0118] (2) Estimation of the lifting load and the number of operations of the portal crane.

[0119] According to the information provided in Table 1 and the calculation methods for the upper and lower limits of the equivalent full-load working cycle times of the portal crane discussed above, calculate the weight of the load lifted each time and the number of lifts of the corresponding weight.

[0120] a. Lower limit.

[0121] If the lifting weight each time is the same, then the lifting weight each time (t): .

[0122] b. Upper limit.

[0123] The maximum number of full-load operations is: ; The number of operations in other cases is: . The lifting weight (t) in other cases is: .

[0124] Table 3 Lifting load weight and corresponding number of operations of the portal crane per day

[0125] (3) Estimation of equivalent full-load working cycle times and remaining life.

[0126] According to the working record information of the equipment provided in Table 1, the total number of working cycles that the portal crane has undergone is: .

[0127] According to the calculation results provided in Table 3, the calculation results of the lower limit and upper limit of the equivalent full-load working cycle times are as follows.

[0128] The lower limit of the equivalent working cycle times of the crane is estimated according to formula (1). Considering that the number of working cycles is not automatically recorded, the actual working magnification factor in the formula is taken according to the provisions of Table 4 , then the lower limit is as follows.

[0129] .

[0130] The upper limit is as follows.

[0131] .

[0132] According to Table 2, the working level is , and the load spectrum coefficient The number of full-load working cycles is . It can be seen from the estimation results that the equivalent full-load working cycle times of this crane are between times and , and the remaining life is between 0 times and , and it has approached or exceeded the design service life.

[0133] Table 4 Magnification factor

[0134] Therefore, the following conclusion can be drawn: According to the operation data of the portal crane, the design life of this equipment is times, and according to the estimation, the equivalent full-load working cycle times are from... to from... to Between these values, the remaining life is from... to... The portal crane is approaching or exceeding its design life, and further inspection and evaluation of the equipment are required.

[0135] In an exemplary embodiment, a computer device is provided. The computer device can be a server or a terminal, and its internal structure diagram can be as shown in Figure 3 Figure [Figure number]. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the known conditions of the portal crane. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements a method for estimating the overall life of a portal crane.

[0136] Those skilled in the art can understand that Figure 3 the structure shown in [Figure number] is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0137] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the above-mentioned method embodiments are implemented.

[0138] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by the processor, the above-mentioned method embodiments are implemented.

[0139] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by the processor, the above-mentioned method embodiments are implemented.

[0140] 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 for analysis, stored data, displayed data, 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 relevant data need to comply with relevant regulations.

[0141] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random access memories (ReRAM), magnetoresistive random access memories (MRAM), ferroelectric random access memories (FRAM), phase change memories (PCM), graphene memories, etc. Volatile memories can include random access memory (RAM) or external cache memories, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0142] The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in this application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logics, data processing logics based on quantum computing, etc., without limitation.

[0143] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope described in this specification.

[0144] In this article, specific examples are used to elaborate on the principles and implementation modes of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. At the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation modes and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A method for estimating the overall life of a portal crane, characterized in that The method for estimating the overall life of the portal crane includes: Obtaining the known conditions of the portal crane; the known conditions include: the maximum rated lifting capacity of the portal crane, the total lifting weight in a certain working cycle, and the total number of working cycles. Based on the known conditions, determining the objective function and the constraint conditions. Solving the objective function to obtain the minimum value and the maximum value of the objective function. Based on the minimum value and the maximum value of the objective function, determining the equivalent full-load working cycle number of the whole machine. Based on the equivalent full-load working cycle number of the whole machine, the working class of the portal crane, and the specified full-load working cycle number of the crane, determining the remaining life of the portal crane.

2. The method for estimating the overall service life of a portal crane according to claim 1, characterized in that, The expressions of the objective function and the constraint conditions are: ； ； ； ； Among them, is the objective function; is the actual lifting load for each working cycle of the portal crane; is the total number of working cycles that the portal crane has undergone; is the maximum rated lifting load of the portal crane; is the total lifting weight of the portal crane in a certain working period.

3. The method for estimating the overall service life of a portal crane according to claim 1, wherein Solving the objective function to obtain the minimum value of the objective function, specifically including: Constructing the Lagrangian function. Solving the Lagrangian function to obtain the minimum value of the objective function.

4. The method for estimating the overall service life of a portal crane according to claim 3, characterized in that The expression of the Lagrangian function is: ； Among them, is the Lagrangian function; is the Lagrange multiplier; is the actual lifting load of the portal crane for each working cycle; is the total number of working cycles that the portal crane has undergone; is the total lifting weight of the portal crane in a certain working period.

5. The method for estimating the overall life of a portal crane according to claim 3, wherein The formula for solving the Lagrangian function is: ； ； ； Among them, is the Lagrangian function; is the Lagrange multiplier; is the actual lifting load for each working cycle of the portal crane; is the total number of working cycles that the portal crane has undergone; is the total lifting weight of the portal crane in a certain working period.

6. The method for estimating the overall service life of a portal crane according to claim 1, characterized in that, Solving the objective function to obtain the maximum value of the objective function, specifically including: When the total number of working cycles that have occurred for the portal crane is 2, calculating to obtain the maximum value of the objective function. When the total number of working cycles that have occurred for the portal crane is greater than 2, according to the formula for calculating the maximum value of the objective function when the total number of working cycles that have occurred for the portal crane is 2, determining the generalized formula. Based on the generalized formula, determining the maximum value of the objective function.

7. The method for estimating the overall life of a portal crane according to claim 6, wherein The expression of the generalized formula is: ； ； ； Among them, is the maximum rated lifting load of the portal crane; is the actual lifting load of each working cycle of the portal crane; is an intermediate variable; is the first given value, is an integer and ; is the second given value; is the largest integer not greater than a certain number.

8. A computer device, comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method for estimating the overall life of the portal crane according to any one of claims 1-7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for estimating the overall life of the portal crane according to any one of claims 1-7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for estimating the overall life of the portal crane according to any one of claims 1-7.

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