Method and system for evaluating the degradation bearing capacity of main materials for connection to digital power grid

Abstract

The present invention provides a method and system for evaluating the degraded bearing capacity of docking main materials applied to digital power grids, and relates to the technical field of digital power grids; the method includes: obtaining the actual internal force borne by the docking main materials; calculating the reinforcement coefficient of the docking main materials according to the geometric parameters and mechanical performance indicators of the docking main materials and their connecting parts; calculating the bearing capacity of the docking main materials according to the reinforcement coefficient of the docking main materials and the number of single-limb connecting bolts of the docking main materials; comparing the bearing capacity of the docking main materials with the actual internal force borne by the docking main materials, and obtaining the evaluation results of the degraded bearing capacity of the docking main materials. The system includes a basic database, a numerical analysis module, a main material bearing capacity evaluation module, and a result output module. The present invention can realize the digital evaluation of the degraded bearing capacity of the docking main materials, and the evaluation results are reliable and accurate, providing a scientific and effective reference for design and operation and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of digital power grids, and in particular to a method and system for evaluating the degraded bearing capacity of a main material for connection applied to a digital power grid. Background Art

[0002] In order to promote and build the entire digital system of digital power grid design, it is necessary to use digital methods to evaluate the bearing capacity of the main load-bearing components in the transmission lines, so as to provide an effective reference for maintaining the stable operation of the transmission lines.

[0003] As the main load-bearing component of the transmission line structure, the main material of the butt joint plays a vital role in supporting the erection of the line and is the skeleton of the structural design. Specifically, in the design of some transmission towers, the main material will be in the form of a disconnected node, that is, two main material angle steels separated from each other are connected using components such as external angle steels and node plates to ensure that the tower meets the spatial dimensions and design requirements and improve the stability and bearing capacity of the structure; that is to say, the main material of the butt joint refers to the connection node of the main material angle steel when constructing the transmission tower skeleton, which bears the stress of the transmission tower as a connecting structure. The force complexity of the butt joint main material directly affects the stability of the entire transmission tower. Therefore, when designing and manufacturing transmission towers, the connection method and material selection of the butt joint main material are crucial to ensuring the safety and reliability of the entire power transmission system.

[0004] However, the bearing capacity of the separated main material for the connection will show different degrees of degradation compared with the integrated main material angle steel. The existing design method lacks a detailed calculation method for this degree of degradation. The main material for the connection is usually designed based on experience or margin design. It is impossible to scientifically evaluate the degraded bearing capacity of the main material for the connection, and it is impossible to know the bearing condition of the main material for the connection. This is not conducive to the stable and reliable operation of the transmission line, nor does it meet the construction goals of the digital power grid. Summary of the invention

[0005] The present invention aims to solve at least one of the above-mentioned technical problems existing in the prior art.

[0006] To this end, a first aspect of the present invention provides a method for assessing the degraded bearing capacity of a main material for connection to a digital power grid.

[0007] A second aspect of the present invention provides a system for assessing the degradation bearing capacity of main materials for connection to a digital power grid.

[0008] The present invention provides a method for evaluating the degraded bearing capacity of a docking main material applied to a digital power grid, wherein the docking main material comprises a first main material angle steel and a second main material angle steel, wherein the first main material angle steel and the second main material angle steel are fixedly connected by a connecting angle steel, a first connecting node plate and a second connecting node plate, wherein the connecting angle steel is arranged on the inner side of the docking main material, and the first connecting node plate and the second connecting node plate are arranged on the outer side of the docking main material; wherein the first connecting node plate, one limb of the docking main material and the connecting angle steel are fixedly connected by connecting bolts, and the second connecting node plate, another limb of the docking main material and the connecting angle steel are fixedly connected by connecting bolts, and the method comprises:

[0009] Obtain the actual internal force borne by the main material being connected;

[0010] Calculate the reinforcement coefficient of the butt joint main material according to the geometric parameters and mechanical performance indicators of the butt joint main material and its connected parts; wherein the geometric parameters include the cross-sectional area of ​​each part, and the mechanical performance indicators include the steel yield strength of each part;

[0011] Calculate the bearing capacity of the butt joint material based on the reinforcement coefficient of the butt joint material and the number of single-leg connection bolts of the butt joint material;

[0012] The bearing capacity of the butt joint main material is compared with the actual internal force borne by the butt joint main material to obtain the evaluation result of the degraded bearing capacity of the butt joint main material.

[0013] The method for assessing the degradation bearing capacity of main materials for connection to a digital power grid according to the above technical solution of the present invention may also have the following additional technical features:

[0014] In the above technical solution, the strengthening coefficient of the butt joint main material is calculated according to the geometric parameters and mechanical performance indicators of the butt joint main material and its connecting parts, including:

[0015]

[0016] in, Indicates the reinforcement coefficient of the main material being butted; Indicates the gross cross-sectional area of ​​the connecting angle steel; Indicates the steel yield strength of the connecting angle steel; represents the gross cross-sectional area of ​​the first connection gusset plate; represents the steel yield strength of the first connection gusset plate; represents the gross cross-sectional area of ​​the second connection gusset plate; represents the steel yield strength of the second connection gusset plate; Indicates the steel yield strength of the main angle steel; Indicates the rough cross-sectional area of ​​the main material angle steel.

[0017] In the above technical solution, the first connection node plate and the second connection node plate are made of the same material, that is, the steel yield strengths of the first connection node plate and the second connection node plate are equal.

[0018] In the above technical solution, the method of calculating the bearing capacity of the butt joint main material according to the reinforcement coefficient of the butt joint main material and the number of single-leg connection bolts of the butt joint main material includes:

[0019]

[0020] in, Indicates the bearing capacity of the main material to be connected; Indicates the bearing capacity degradation coefficient of the main material being butted; Indicates the number of single-leg connection bolts for the main material being connected; Indicates the connection judgment constant; It represents the compressive stability factor of the component; represents the strength reduction factor of the compression rod; Material partial factor for the main material angle steel.

[0021] In the above technical solution, the connection judgment constant is related to the specifications of the connection bolts in the main material to be connected;

[0022] When the connecting bolt specification is M16, take ;

[0023] When the connecting bolt specification is M20, take ;

[0024] When the connecting bolt specification is M24, take .

[0025] In the above technical solution, the comparison of the bearing capacity of the butted main material with the actual internal force borne by the butted main material to obtain the evaluation result of the degraded bearing capacity of the butted main material includes:

[0026] When the bearing capacity of the butt joint main material is greater than or equal to the actual internal force borne by the butt joint main material, it means that the bearing capacity of the butt joint main material meets the requirements;

[0027] When the bearing capacity of the connecting main material is less than the actual internal force borne by the connecting main material, it means that the bearing capacity of the connecting main material does not meet the requirements.

[0028] In the above technical solution, the actual internal force borne by the main material to be connected is obtained, including:

[0029] According to the basic parameter data of the transmission tower, the three-dimensional model of the transmission tower is called, and the actual internal force borne by the docking main material is calculated using the stiffness matrix; the basic parameter data at least includes tower load information, tower component material information, tower component specification information and bolt node information.

[0030] The present invention provides a system for evaluating the degradation bearing capacity of main materials for connection of digital power grids, which is used to implement the method described in any one of the above technical solutions. The system includes:

[0031] Basic database, used to store basic parameter data of transmission towers;

[0032] A numerical analysis module, connected to the basic database, calculates the actual internal force borne by the main material to be connected according to the basic parameter data;

[0033] The main material bearing capacity assessment module is connected to the basic database and the numerical analysis module respectively, and is used to assess the degraded bearing capacity of the butt main material;

[0034] The result output module is connected to the main material bearing capacity assessment module and is at least used to display the assessment result of the degraded bearing capacity of the butt main material.

[0035] In the above technical solution, the basic database includes:

[0036] Basic information database, used to store tower load information, importance coefficient and voltage level of transmission towers;

[0037] Material information library, used to store material information of each component in the transmission tower;

[0038] Specification information library, used to store specification information of each component in the transmission tower;

[0039] The bolt information library is used to store bolt node information in the transmission tower, and the bolt node information includes bolt specifications and bolt quantities.

[0040] The above technical solution also includes:

[0041] A three-dimensional model library, used to store three-dimensional model data of transmission towers;

[0042] Stiffness matrix library, used to store the stiffness matrix data of transmission towers;

[0043] The numerical analysis module is connected with the three-dimensional model library and the stiffness matrix library, calls the three-dimensional model of the transmission tower, and uses the stiffness matrix to calculate the actual internal force borne by the main material of the connection.

[0044] In summary, due to the adoption of the above technical features, the beneficial effects of the present invention are:

[0045] The method and system for evaluating the degraded bearing capacity of the main material for the connection proposed in the present invention for the digital power grid can characterize the degree of degradation of the bearing capacity of the main material for the connection according to the structural characteristics of the main material for the connection, and can accurately calculate and obtain the real bearing capacity of the main material for the connection, so as to reflect the actual operation of the main material for the connection, and provide a scientific and effective reference for line operation and maintenance. At the same time, the digital evaluation method can be used to efficiently obtain the evaluation results of the degraded bearing capacity of the main material for the connection, and promote the digital development of the power grid.

[0046] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0048] Figure 1 It is a schematic diagram of the cross-sectional structure of the main material being butted together in one embodiment of the present invention;

[0049] Figure 2 It is a schematic diagram of the front structure of the main material connected in one embodiment of the present invention;

[0050] Figure 3 It is a flow chart of a method for evaluating the degradation bearing capacity of main materials for connection applied to a digital power grid according to an embodiment of the present invention;

[0051] Figure 4 It is a module schematic diagram of a system for assessing the degradation bearing capacity of main materials for connection to a digital power grid according to an embodiment of the present invention.

[0052] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0053] 1. Connect the main material; 2. Connect the angle steel; 3. First connection node plate; 4. Second connection node plate; 5. Connect the bolts;

[0054] 11. The first main material is angle steel; 12. The second main material is angle steel. DETAILED DESCRIPTION

[0055] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0056] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0057] Refer to the following Figures 1 to 4 The following describes a method and system for assessing the degradation bearing capacity of a main material for connection to a digital power grid provided in accordance with some embodiments of the present invention.

[0058] Some embodiments of the present application provide a method for assessing the degraded bearing capacity of a main material for connection to a digital power grid.

[0059] Figure 1 and Figure 2 The common form of the butt joint main material 1 is shown. Specifically, the butt joint main material 1 includes a first main material angle steel 11 and a second main material angle steel 12. The first main material angle steel 11 and the second main material angle steel 12 are fixedly connected by a connecting angle steel 2, a first connecting node plate 3 and a second connecting node plate 4, wherein the connecting angle steel 2 is arranged on the inner side of the butt joint main material 1, and the first connecting node plate 3 and the second connecting node plate 4 are arranged on the outer side of the butt joint main material; wherein the first connecting node plate 3, a limb of the butt joint main material 1 and the connecting angle steel 2 are fixedly connected by connecting bolts 5, and the second connecting node plate 4 is fixedly connected by connecting bolts 5. The node plate 4, another limb of the butt joint main material 1 and the connecting angle steel 2 are fixedly connected by connecting bolts 5. It can be understood that the first main material angle steel 11 and the second main material angle steel 12 are separated from each other. When the breakpoint position is not considered, the first main material angle steel 11 and the second main material angle steel 12 are still arranged to present a complete main material angle steel shape. By utilizing the connecting effect of the connecting angle steel 2, the first connecting node plate 3, and the second connecting node plate 4, the two main material angle steels are formed into a whole, that is, the butt joint main material 1. However, compared with the main material angle steel that is not broken and is in an integrated form, the butt joint main material 1 will show a degradation of bearing capacity.

[0060] The first embodiment of the present invention proposes a method for evaluating the degradation bearing capacity of the main material of the connection applied to the digital power grid, such as Figure 3 As shown, the process specifically includes the following steps S1-S4.

[0061] S1. Obtain the actual internal force borne by the main material being connected.

[0062] It should be noted that when designing or evaluating the main docking material, the load information of the tower and the parameters of other components are all known data, and the actual internal force borne by the main docking material can be obtained by using these known data. The specific method for obtaining the actual internal force borne by the main docking material can be calculated by any existing calculation method for calculating the internal force borne by a certain point on the transmission tower, or it can be obtained by simulation. The specific calculation method and simulation method are well known to those skilled in the art.

[0063] In a specific embodiment of the present disclosure, step S1 includes:

[0064] According to the basic parameter data of the transmission tower, the three-dimensional model of the transmission tower is called, and the actual internal force borne by the docking main material is calculated using the stiffness matrix; the basic parameter data at least includes tower load information, tower component material information, tower component specification information and bolt node information.

[0065] It should be noted that the stiffness matrix of the transmission tower records the stiffness characteristics of the transmission tower in different directions. Using the stiffness matrix to perform force analysis on points on the transmission tower is a common method used by those skilled in the art. In the present disclosure, using the pre-obtained stiffness matrix to calculate the internal force borne by the main material of the docking can effectively improve the calculation speed.

[0066] S2. Calculate the reinforcement coefficient of the butt joint main material according to the geometric parameters and mechanical performance indicators of the butt joint main material and its connecting parts; wherein the geometric parameters include the cross-sectional area of ​​each part, and the mechanical performance indicators include the steel yield strength of each part.

[0067] Specifically, step S2 includes:

[0068]

[0069] in, Indicates the reinforcement coefficient of the main material being butted; Indicates the gross cross-sectional area of ​​the connecting angle steel; Indicates the steel yield strength of the connecting angle steel; represents the gross cross-sectional area of ​​the first connection gusset plate; represents the steel yield strength of the first connection gusset plate; represents the gross cross-sectional area of ​​the second connection gusset plate; represents the steel yield strength of the second connection gusset plate; Indicates the steel yield strength of the main angle steel; Indicates the rough cross-sectional area of ​​the main material angle steel.

[0070] The reinforcement coefficient of the above-mentioned butt joint main material reflects the change in the steel yield strength of the butt joint main material formed after the two main material angle steels are separately fixed compared to the integrated main material angle steel.

[0071] Generally, the first connection node plate and the second connection node plate are made of the same material, and the sizes of the first connection node plate and the second connection node plate can be the same or different, that is, the steel yield strength of the first connection node plate and the second connection node plate is equal. express.

[0072] The reinforcement coefficient of the butt joint main material can be expressed as:

[0073] .

[0074] S3. Calculate the bearing capacity of the butt joint material based on the reinforcement coefficient of the butt joint material and the number of single-leg connecting bolts of the butt joint material.

[0075] In general, since the main angle steel is generally an equilateral angle steel, the number of connecting bolts on both legs is equal. The bearing capacity degradation coefficient of the butt joint main material can be calculated based on the reinforcement coefficient of the butt joint main material and the number of connecting bolts on a single leg of the butt joint main material.

[0076] In some embodiments, the degradation coefficient is calculated as follows:

[0077]

[0078] in, Indicates the bearing capacity degradation coefficient of the main material being butted; Indicates the number of single-leg connection bolts of the butt main material, that is, the number of connection bolts on the first connection node plate or the second connection node plate; Indicates the connection judgment constant.

[0079] In a specific embodiment, the connection judgment constant is related to the specifications of the connection bolts in the butted main materials.

[0080] Specifically, when the connecting bolt specification is M16, ; When the connecting bolt specification is M20, take ; When the connecting bolt specification is M24, take That is to say, the larger the diameter of the connecting bolt, the larger the connection judgment constant.

[0081] Among them, M16, M20 and M24 are all commonly used specifications for connecting bolts in docking main materials. It can be understood that in the same docking main material, all connecting bolts use the same specifications.

[0082] Based on the above degradation coefficient, the bearing capacity of the degraded main material can be calculated. The specific calculation method is as follows:

[0083]

[0084] in, Indicates the bearing capacity of the main material to be connected. It represents the compressive stability factor of the component; represents the strength reduction factor of the compression rod; Material partial factor for the main material angle steel.

[0085] S4. Compare the bearing capacity of the butt joint main material with the actual internal force borne by the butt joint main material to obtain an evaluation result of the degraded bearing capacity of the butt joint main material.

[0086] In some embodiments, when the bearing capacity of the main material is greater than or equal to the actual internal force borne by the main material, it means that the bearing capacity of the main material meets the requirements; when the bearing capacity of the main material is less than the actual internal force borne by the main material, it means that the bearing capacity of the main material does not meet the requirements. The specific evaluation principle can be expressed as:

[0087]

[0088] Wherein, N represents the actual internal force borne by the main material of the joint.

[0089] It is understandable that the above-mentioned specific evaluation method is only a schematic representation. In the specific application process, a certain reduction factor can be added to the calculated bearing capacity of the connecting main material based on the importance and operating conditions of the transmission tower, so as to make the evaluation result safer and more reliable.

[0090] Moreover, by using the evaluation method disclosed in the present invention, the design quantity of connecting bolts and the selected specifications of the connecting node plates can be verified in the design stage, and those that do not meet the requirements should be redesigned.

[0091] Some other embodiments of the present invention provide a system for evaluating the degradation bearing capacity of main materials for connection to a digital power grid, which is used to implement the method described in any of the above embodiments, such as Figure 4 As shown, the system includes: a basic database, a numerical analysis module, a main material bearing capacity assessment module and a result output module.

[0092] The basic database is used to store the basic parameter data of the transmission tower; the basic parameter data can be understood as the relevant parameters of the transmission tower required for internal force or bearing capacity calculation, including load conditions, component materials, component specifications, bolt quantity, bolt specifications, etc.

[0093] The numerical analysis module is connected to the basic database and calculates the actual internal force borne by the main materials to be connected according to the basic parameter data.

[0094] The main material bearing capacity assessment module is connected to the basic database and the numerical analysis module respectively, and is used to assess the degraded bearing capacity of the butt joint main material according to steps S2-S4. If the assessment principle is met, it means that the bearing capacity of the butt joint main material meets the requirements; if the assessment principle is not met, it means that the bearing capacity of the butt joint main material is insufficient.

[0095] The result output module is connected to the main material bearing capacity assessment module and is at least used to display the assessment result of the degraded bearing capacity of the butt main material.

[0096] In some embodiments, the basic database may be divided into a basic information library, a material information library, a specification information library, and a bolt information library to store different types of basic parameter data.

[0097] The basic information database is used to store the tower load information, importance coefficient and voltage level of the transmission tower; the material information database is used to store the material information of each component in the transmission tower; the specification information database is used to store the specification information of each component in the transmission tower; the bolt information database is used to store the bolt node information in the transmission tower, and the bolt node information includes bolt specifications and bolt quantities.

[0098] In some embodiments, the system further includes a three-dimensional model library and a stiffness matrix library. The three-dimensional model library is used to store the three-dimensional model data of the transmission tower; the stiffness matrix library is used to store the stiffness matrix data of the transmission tower; the numerical analysis module is connected to the three-dimensional model library and the stiffness matrix library, calls the three-dimensional model of the transmission tower, and uses the stiffness matrix to calculate the actual internal force borne by the main material of the docking.

[0099] In a specific embodiment, after the result output module receives the data from the main material bearing capacity assessment module, if the data result is satisfied, it will display "green", if the data result is not satisfied, it will display "red", and upload the data result to the owner, waiting for the owner to make final instructions on the assessment result, the instructions include "assessment results meet, continue to run", "assessment results do not meet, need to be transformed and reinforced", the result output module can also generate a final assessment analysis report (.docx or .doc format) for owner and designer reference.

[0100] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0101] Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for evaluating the degraded bearing capacity of a main material for a digital power grid, wherein the main material for a connection includes a first main material angle steel and a second main material angle steel, wherein the first main material angle steel and the second main material angle steel are fixedly connected by connecting angle steels, a first connecting node plate, and a second connecting node plate, wherein: The connecting angle steel is arranged on the inner side of the butted main material, and the first connecting gusset plate and the second connecting gusset plate are arranged on the outer side of the butted main material; wherein the first connecting gusset plate, one limb of the butted main material and the connecting angle steel are fixedly connected by connecting bolts, and the second connecting gusset plate, another limb of the butted main material and the connecting angle steel are fixedly connected by connecting bolts, characterized in that it comprises: Obtain the actual internal force borne by the main material being connected; Calculate the reinforcement coefficient of the butt joint main material according to the geometric parameters and mechanical performance indicators of the butt joint main material and its connected parts; wherein the geometric parameters include the cross-sectional area of ​​each part, and the mechanical performance indicators include the steel yield strength of each part; Calculate the bearing capacity of the butt joint material based on the reinforcement coefficient of the butt joint material and the number of single-leg connection bolts of the butt joint material; Compare the bearing capacity of the butt joint main material with the actual internal force borne by the butt joint main material to obtain the evaluation result of the degraded bearing capacity of the butt joint main material; The method of calculating the reinforcement coefficient of the butt joint main material according to the geometric parameters and mechanical performance indicators of the butt joint main material and its connecting parts includes: in, Indicates the reinforcement coefficient of the main material being butted; Indicates the gross cross-sectional area of ​​the connecting angle steel; Indicates the steel yield strength of the connecting angle steel; represents the gross cross-sectional area of ​​the first connection gusset plate; represents the steel yield strength of the first connection gusset plate; represents the gross cross-sectional area of ​​the second connection gusset plate; represents the steel yield strength of the second connection gusset plate; Indicates the steel yield strength of the main angle steel; Indicates the rough cross-sectional area of ​​the main material angle steel; The method of calculating the bearing capacity of the butt joint main material according to the reinforcement coefficient of the butt joint main material and the number of single-leg connection bolts of the butt joint main material includes: in, Indicates the bearing capacity of the main material to be connected; Indicates the bearing capacity degradation coefficient of the main material being butted; Indicates the number of single-leg connection bolts for the main material being connected; Indicates the connection judgment constant; It represents the compressive stability factor of the component; represents the strength reduction factor of the compression rod; Material partial factor for the main material angle steel.

2. The method for assessing the degradation bearing capacity of main materials for connection to a digital power grid according to claim 1 is characterized in that: The first connection node plate and the second connection node plate are made of the same material, that is, the steel yield strengths of the first connection node plate and the second connection node plate are equal.

3. The method for assessing the degradation bearing capacity of main materials for connection to a digital power grid according to claim 1 is characterized in that: The connection judgment constant is related to the specifications of the connection bolts in the main material to be connected; When the connecting bolt specification is M16, take ; When the connecting bolt specification is M20, take ; When the connecting bolt specification is M24, take .

4. The method for assessing the degradation bearing capacity of main materials for connection to a digital power grid according to claim 1 is characterized in that: The step of comparing the bearing capacity of the butted main material with the actual internal force borne by the butted main material to obtain the evaluation result of the degraded bearing capacity of the butted main material includes: When the bearing capacity of the butt joint main material is greater than or equal to the actual internal force borne by the butt joint main material, it means that the bearing capacity of the butt joint main material meets the requirements; When the bearing capacity of the connecting main material is less than the actual internal force borne by the connecting main material, it means that the bearing capacity of the connecting main material does not meet the requirements.

5. The method for assessing the degradation bearing capacity of main materials for connection to a digital power grid according to claim 1 is characterized in that: The obtaining of the actual internal force borne by the main materials to be connected comprises: According to the basic parameter data of the transmission tower, the three-dimensional model of the transmission tower is called, and the actual internal force borne by the docking main material is calculated using the stiffness matrix; the basic parameter data at least includes tower load information, tower component material information, tower component specification information and bolt node information.

6. A system for assessing the degradation bearing capacity of main materials for connection to a digital power grid, characterized in that: For implementing the method according to any one of claims 1 to 5, the system comprises: Basic database, used to store basic parameter data of transmission towers; A numerical analysis module, connected to the basic database, calculates the actual internal force borne by the main material to be connected according to the basic parameter data; The main material bearing capacity assessment module is connected to the basic database and the numerical analysis module respectively, and is used to assess the degraded bearing capacity of the butt main material; The result output module is connected to the main material bearing capacity assessment module and is at least used to display the assessment result of the degraded bearing capacity of the butt main material.

7. The main material degradation bearing capacity assessment system for connecting to a digital power grid according to claim 6 is characterized in that: The basic database includes: Basic information database, used to store tower load information, importance coefficient and voltage level of transmission towers; Material information library, used to store material information of each component in the transmission tower; Specification information library, used to store specification information of each component in the transmission tower; The bolt information library is used to store bolt node information in the transmission tower, and the bolt node information includes bolt specifications and bolt quantities.

8. The main material degradation bearing capacity assessment system for connecting to a digital power grid according to claim 6 is characterized in that: Also includes: A three-dimensional model library, used to store three-dimensional model data of transmission towers; Stiffness matrix library, used to store the stiffness matrix data of transmission towers; The numerical analysis module is connected with the three-dimensional model library and the stiffness matrix library, calls the three-dimensional model of the transmission tower, and uses the stiffness matrix to calculate the actual internal force borne by the main material of the connection.

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