Method, device and equipment for determining the degree of damage to transmission tower foundation after lightning strike

Abstract

A method, device and equipment for determining the degree of damage to a transmission tower foundation after a lightning strike, the method comprising: determining the core stable area of ​​a transmission tower foundation according to the size of the transmission tower foundation corresponding to when the inclination of the transmission tower foundation reaches a threshold; determining the area of ​​influence of the transmission tower foundation on which the lightning strike is applied; calculating the damage weight coefficient taking into account the position distribution characteristics of the area affected by the lightning strike according to the distance from the center point of the influence area to the center point of the core stable area; calculating the damage correction coefficient taking into account the severity of damage to the area affected by the lightning strike according to the penetration length of cracks inside the influence area; calculating the degree of damage to the transmission tower foundation after a lightning strike according to the volume of the core stable area, the volume of the influence area, the damage weight coefficient and the damage correction coefficient. The present invention can quantitatively evaluate the degree of damage to the transmission tower foundation after a lightning strike, and the evaluation accuracy is high.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission tower foundations, and in particular to a method, device and equipment for determining the degree of damage to a power transmission tower foundation after a lightning strike. Background Art

[0002] With the rapid development of my country's economy, the construction of power transmission engineering infrastructure is also continuously advancing. As a carrier of high-load electric energy transmission and an important lifeline project of national economic construction and development, the safety and stability of power transmission engineering infrastructure have increasingly attracted people's attention. In recent years, extreme weather has occurred frequently, and the foundations of power transmission towers erected in wilderness areas will inevitably be struck by lightning, which will cause certain damage to the foundations of power transmission towers and affect their bearing capacity and service performance.

[0003] The traditional method uses manual visual evaluation to judge the damage of the transmission tower foundation caused by lightning strikes. The inspection personnel determine whether the transmission tower foundation can continue to serve based on the degree of cracking on the foundation surface. This method has strong subjective factors and cannot be quantitatively evaluated. Therefore, this method cannot objectively and accurately evaluate the degree of damage to the transmission tower foundation after being struck by lightning. In addition, the inspection personnel can only identify the surface damage, and it is difficult to detect internal damage or small cracks, so the accuracy of this method is low. Determining the degree of damage to the transmission tower foundation is crucial to evaluating the safety and stability of the transmission tower foundation. Therefore, it is urgent to provide a method for determining the degree of damage to the transmission tower foundation after lightning strikes, so as to more accurately provide guidance and reference for the safety and stability evaluation of the transmission tower foundation after lightning strikes in actual projects. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects and problems existing in the prior art and to provide a method, device and equipment for determining the degree of damage to the foundation of a power transmission tower after a lightning strike, so as to accurately determine the degree of damage to the foundation of a power transmission tower after a lightning strike.

[0005] To achieve the above objectives, the technical solution of the present invention is:

[0006] A method for determining the degree of damage to a transmission tower foundation after a lightning strike, comprising:

[0007] Determine the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value;

[0008] Determine the area affected by lightning strikes on the transmission tower foundation;

[0009] The damage weight coefficient considering the location distribution characteristics of the area affected by lightning is calculated according to the distance from the center point of the affected area to the center point of the core stable area;

[0010] The damage correction factor considering the severity of damage to the area affected by lightning is calculated based on the penetration length of the crack inside the affected area;

[0011] The degree of damage to the foundation of the transmission tower after lightning strike is calculated based on the volume of the core stable area, the volume of the affected area, the damage weight coefficient and the damage correction coefficient.

[0012] The step of determining the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value comprises:

[0013] In the finite element numerical simulation software, a transmission tower and foundation consistent with the actual project size is established, and an external load consistent with the actual size is input. The edge size of the transmission tower foundation is continuously reduced from the outside to the inside using the life-and-death unit method, and the inclination of the transmission tower foundation is output until the inclination of the transmission tower foundation reaches a threshold value. The core stable area of ​​the transmission tower foundation is determined by the transmission tower foundation size corresponding to the inclination of the transmission tower foundation at this time.

[0014] The threshold value of the transmission tower foundation inclination is 0.5%.

[0015] Determining the area affected by lightning strike on the transmission tower foundation includes:

[0016] An X-ray scanner is used to scan the transmission tower foundation after being struck by lightning, and the area affected by the lightning strike on the transmission tower foundation is obtained based on the generated X-ray image.

[0017] The calculation method of the damage weight coefficient is:

[0018] when When , the damage weight coefficient α is 1;

[0019] when When , the damage weight coefficient α is 0;

[0020] In other cases, the calculation formula of the damage weight coefficient α is:

[0021]

[0022] Where (x0, y0, z0) is the center point of the core stability region; r0 is the radius of the core stability region; (x, y, z) is the center point of the influence region; r is the radius of the influence region.

[0023] The calculation formula of the damage correction coefficient β is:

[0024]

[0025] Where l is the crack penetration length inside the affected area; r is the radius of the affected area.

[0026] The calculation formula for the damage degree D of the transmission tower foundation after the lightning strike is:

[0027]

[0028] Where β is the damage correction coefficient; α is the damage weight coefficient; V1 is the volume of the affected area; and V is the volume of the core stable area.

[0029] A device for determining the degree of damage to a transmission tower foundation after a lightning strike, the device is applied to the above-mentioned method, and the device comprises:

[0030] A core stable area determination module is used to determine the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value;

[0031] An impact area determination module is used to determine the impact area of ​​the transmission tower foundation caused by lightning strike;

[0032] A damage weight coefficient calculation module is used to calculate the damage weight coefficient taking into account the position distribution characteristics of the area affected by the lightning strike according to the distance from the center point of the affected area to the center point of the core stable area;

[0033] A damage correction factor calculation module is used to calculate the damage correction factor considering the severity of damage to the area affected by the lightning strike according to the crack penetration length inside the affected area;

[0034] The transmission tower foundation damage degree calculation module is used to calculate the transmission tower foundation damage degree after lightning strike based on the volume of the core stable area, the volume of the affected area, the damage weight coefficient and the damage correction coefficient.

[0035] A device for determining the degree of damage to a transmission tower foundation after a lightning strike, comprising a memory and a processor;

[0036] The memory is used to store computer program code and transmit the computer program code to the processor;

[0037] The processor is used to execute the method according to the instructions in the computer program code.

[0038] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] In a method, device and equipment for determining the degree of damage to a transmission tower foundation after a lightning strike of the present invention, the method determines a core stable area of ​​a transmission tower foundation based on an inclination, that is, the area subjected to a lightning strike will significantly affect the bearing capacity and stability of the transmission tower foundation; by introducing a damage weight coefficient that considers the position distribution characteristics of the lightning-struck area, the influence of the spatial position of the lightning-struck area on the damage to the transmission tower foundation is fully considered; the severity of the damage to the lightning-struck area is determined based on the through-length of cracks inside the area affected by the lightning strike, which can truly reflect the degree of damage to the lightning-struck area; by introducing a damage correction coefficient that considers the severity of damage to the lightning-struck area, the accuracy of the degree of damage to the transmission tower foundation can be further improved; finally, by comprehensively considering the size, spatial position and severity of damage to the area affected by the lightning strike of the transmission tower foundation, the degree of damage to the transmission tower foundation after a lightning strike can be quantitatively evaluated, which has the advantages of high precision and accurate evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The present invention is a flow chart of a method for determining the degree of damage to a transmission tower foundation after a lightning strike.

[0042] Figure 2 The present invention is a structural block diagram of a device for determining the degree of damage to a transmission tower foundation after a lightning strike.

[0043] Figure 3 The present invention is a structural block diagram of a device for determining the degree of damage to a transmission tower foundation after a lightning strike. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] See also Figure 1 The present invention provides a method for determining the degree of damage to a transmission tower foundation after a lightning strike, comprising:

[0046] S1. Determine the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value;

[0047] S2. Determine the area affected by lightning strikes on the transmission tower foundation;

[0048] S3. Calculate the damage weight coefficient considering the position distribution characteristics of the area affected by lightning strike according to the distance from the center point of the affected area to the center point of the core stable area;

[0049] The damage correction factor considering the severity of damage to the area affected by lightning is calculated based on the penetration length of the crack inside the affected area;

[0050] S4. Calculate the degree of damage to the foundation of the transmission tower after lightning strike based on the volume of the core stable area, the volume of the affected area, the damage weight coefficient and the damage correction coefficient.

[0051] The damage degree of the transmission tower foundation after a lightning strike calculated by the present invention comprehensively considers the volume of the core stable area of ​​the transmission tower foundation, the volume and position distribution characteristics of the area affected by the lightning strike of the transmission tower foundation, and the severity of damage to the area affected by the lightning strike. It can quantitatively evaluate the damage degree of the transmission tower foundation after a lightning strike, and has the advantages of high precision and accurate evaluation.

[0052] Furthermore, the core stable area of ​​the transmission tower foundation is determined according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value, including:

[0053] In a 500kV power transmission project in a certain place, the foundation height of a certain transmission tower is 3 meters and the plane size is 2 meters × 2 meters. In the finite element numerical simulation software, a transmission tower and foundation consistent with the actual project size (2 meters × 2 meters × 3 meters) are established, and the external load consistent with the actual is input, among which the vertical load is 2150kN and the horizontal load is 370kN; the edge size of the transmission tower foundation is continuously reduced from the outside to the inside using the birth and death unit method, and the inclination of the transmission tower foundation is output until the inclination of the transmission tower foundation reaches the threshold value of 0.5%. The core stable area of ​​the transmission tower foundation is determined by the transmission tower foundation size corresponding to the inclination of the transmission tower foundation at this time. The size of the core stable area is 1.6 meters × 1.6 meters × 3 meters, and the volume V of the core stable area is about 7.68 cubic meters, the radius r0 is about 0.8 meters, and the center point position (x0, y0, z0) is (0, 0, 0).

[0054] The present invention adopts a numerical simulation method and determines the core stable area of ​​the transmission tower foundation based on the inclination index, that is, the area where lightning strikes will significantly affect the bearing capacity and stability of the transmission tower foundation. If the area of ​​the transmission tower foundation affected by lightning is located outside the core stable area, it indicates that the lightning strike has no effect on its bearing capacity and stability; if the area of ​​the transmission tower foundation affected by lightning is located within the core stable area, it indicates that the lightning strike has a great impact on its bearing capacity and stability; the delineation of the core stable area of ​​the transmission tower foundation is of great significance to determining the degree of damage to the transmission tower foundation.

[0055] Furthermore, the area affected by lightning strikes on the transmission tower foundation is determined, including:

[0056] Since the affected area of ​​the transmission tower foundation after lightning strike will produce more pores and cracks, X-ray scanners can scan the internal defects of the material. The transmission tower foundation after lightning strike is scanned by an X-ray scanner, and the area affected by lightning strike of the transmission tower foundation is obtained according to the generated X-ray image. The generated X-ray image is processed and analyzed to obtain the area where the internal pores of the transmission tower foundation change, which is the area affected by lightning strike. Further analysis of the X-ray image shows that the volume V1 of the affected area is about 1.98 cubic meters, the radius r is about 0.77 meters, the center point position (x, y, z) is about (0.23, 0.22, 0.53), and the internal crack penetration length l is about 1.25 meters.

[0057] Furthermore, the calculation method of the damage weight coefficient is:

[0058] when When , the damage weight coefficient α is 1;

[0059] when When the damage weight coefficient α is 0, the corresponding degree of damage to the transmission tower foundation after lightning strike is also 0. This situation indicates that the area affected by lightning strike is outside the core stable area, indicating that lightning strike has no effect on its bearing capacity and stability.

[0060] In other cases, the damage weight coefficient α is calculated as:

[0061]

[0062] Where (x0, y0, z0) is the center point of the core stability region; r0 is the radius of the core stability region; (x, y, z) is the center point of the influence region; r is the radius of the influence region.

[0063] In this embodiment, the calculated value of the damage weight coefficient α is 0.606.

[0064] The present invention introduces a damage weight coefficient that takes into account the position distribution characteristics of the area affected by lightning, and fully considers the influence of the spatial position of the area affected by lightning on the damage to the transmission tower foundation. The closer the center point of the area affected by lightning to the center point of the core stable area of ​​the transmission tower foundation, the higher the degree of damage to the transmission tower foundation. By providing the above boundary conditions and calculation formulas to determine the value of the damage weight coefficient, the influence of the spatial position of the affected area on the degree of damage is quantitatively analyzed, and the degree of damage to the transmission tower foundation can be accurately evaluated.

[0065] Furthermore, the calculation formula of the damage correction coefficient β is:

[0066]

[0067] Where l is the crack penetration length inside the affected area; r is the radius of the affected area.

[0068] In this embodiment, the calculated value of the damage correction coefficient β is 0.812.

[0069] The present invention introduces a damage correction coefficient which takes into account the severity of damage to the area affected by lightning strike, and determines the severity of damage to the area affected by lightning strike based on the index of internal crack penetration length in the area affected by lightning strike, which can truly reflect the degree of damage to the affected area. By introducing the damage correction coefficient, the accuracy of the damage degree of the transmission tower foundation can be further improved.

[0070] Furthermore, the calculation formula for the damage degree D of the transmission tower foundation after lightning strike is:

[0071]

[0072] Where β is the damage correction coefficient; α is the damage weight coefficient; V1 is the volume of the affected area; and V is the volume of the core stable area.

[0073] In this embodiment, the value of the transmission tower foundation damage degree D is calculated to be 0.13.

[0074] See also Figure 2 The present invention also provides a device for determining the degree of damage to a transmission tower foundation after a lightning strike, which is applied to the above-mentioned method for determining the degree of damage to a transmission tower foundation after a lightning strike, and the device comprises:

[0075] A core stable area determination module is used to determine the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value;

[0076] An impact area determination module is used to determine the impact area of ​​the transmission tower foundation caused by lightning strike;

[0077] A damage weight coefficient calculation module is used to calculate the damage weight coefficient taking into account the position distribution characteristics of the area affected by the lightning strike according to the distance from the center point of the affected area to the center point of the core stable area;

[0078] A damage correction factor calculation module is used to calculate the damage correction factor considering the severity of damage to the area affected by the lightning strike according to the crack penetration length inside the affected area;

[0079] The transmission tower foundation damage degree calculation module is used to calculate the transmission tower foundation damage degree after lightning strike based on the volume of the core stable area, the volume of the affected area, the damage weight coefficient and the damage correction coefficient.

[0080] See also Figure 3 , the present invention also provides a device for determining the degree of damage to the foundation of a power transmission tower after a lightning strike, comprising a memory and a processor;

[0081] The memory is used to store computer program code and transmit the computer program code to the processor;

[0082] The processor is used to execute the above-mentioned method for determining the degree of damage to the foundation of a transmission tower after a lightning strike according to the instructions in the computer program code.

[0083] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for determining the degree of damage to a transmission tower foundation after a lightning strike is implemented.

[0084] Generally speaking, the computer instructions for implementing the method of the present invention may be carried in any combination of one or more computer-readable storage media. Non-transitory computer-readable storage media may include any computer-readable media, except for the signal itself that is temporarily propagating.

[0085] The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EKROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0086] Computer program code for performing the operation of the present invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages, in particular, Python suitable for neural network computing and platform frameworks based on TensorFlow, PyTorch, etc. can be used. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer or to an external computer (for example, using an Internet service provider to connect via the Internet) through any type of network, including a local area network (LAN) or a wide area network (WAN).

[0087] The above-mentioned device and non-transitory computer-readable storage medium can refer to the specific description of a method for determining the degree of damage to a transmission tower foundation after a lightning strike and its beneficial effects, which will not be repeated here.

[0088] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for determining the degree of damage to a transmission tower foundation after a lightning strike, characterized in that: include: Determine the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value; Determine the area affected by lightning strikes on the transmission tower foundation; The damage weight coefficient considering the location distribution characteristics of the area affected by lightning is calculated according to the distance from the center point of the affected area to the center point of the core stable area; The damage correction factor considering the severity of damage to the area affected by lightning is calculated based on the penetration length of the crack inside the affected area; The degree of damage to the foundation of the transmission tower after lightning strike is calculated based on the volume of the core stable area, the volume of the affected area, the damage weight coefficient and the damage correction coefficient.

2. The method for determining the degree of damage to the foundation of a power transmission tower after a lightning strike according to claim 1, characterized in that: The step of determining the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value comprises: In the finite element numerical simulation software, a transmission tower and foundation consistent with the actual project size is established, and an external load consistent with the actual size is input. The edge size of the transmission tower foundation is continuously reduced from the outside to the inside using the birth-and-death unit method, and the inclination of the transmission tower foundation is output until the inclination of the transmission tower foundation reaches a threshold value. The core stable area of ​​the transmission tower foundation is determined by the transmission tower foundation size corresponding to the inclination of the transmission tower foundation at this time.

3. The method for determining the degree of damage to the foundation of a power transmission tower after a lightning strike according to claim 2, characterized in that: The threshold value of the transmission tower foundation inclination is 0.5%.

4. The method for determining the degree of damage to the foundation of a power transmission tower after a lightning strike according to claim 1, characterized in that: Determining the area affected by lightning strike on the transmission tower foundation includes: An X-ray scanner is used to scan the transmission tower foundation after being struck by lightning, and the area affected by the lightning strike on the transmission tower foundation is obtained based on the generated X-ray image.

5. The method for determining the degree of damage to the foundation of a power transmission tower after a lightning strike according to claim 1, characterized in that: The calculation method of the damage weight coefficient is: when When , the damage weight coefficient α is 1; when When , the damage weight coefficient α is 0; In other cases, the calculation formula of the damage weight coefficient α is: Where (x0, y0, z0) is the center point of the core stability region; r0 is the radius of the core stability region; (x, y, z) is the center point of the influence region; r is the radius of the influence region.

6. The method for determining the degree of damage to the foundation of a power transmission tower after a lightning strike according to claim 1, characterized in that: The calculation formula of the damage correction coefficient β is: Where l is the crack penetration length inside the affected area; r is the radius of the affected area.

7. The method for determining the degree of damage to the foundation of a power transmission tower after a lightning strike according to claim 1, characterized in that: The calculation formula for the damage degree D of the transmission tower foundation after the lightning strike is: Where β is the damage correction coefficient; α is the damage weight coefficient; V1 is the volume of the affected area; and V is the volume of the core stable area.

8. A device for determining the degree of damage to a transmission tower foundation after a lightning strike, characterized in that: The device is applied to the method described in any one of claims 1 to 7, and the device comprises: A core stable area determination module is used to determine the core stable area of ​​the transmission tower foundation according to the transmission tower foundation size corresponding to when the transmission tower foundation inclination reaches a threshold value; An impact area determination module is used to determine the impact area of ​​the transmission tower foundation caused by lightning strike; A damage weight coefficient calculation module is used to calculate the damage weight coefficient taking into account the position distribution characteristics of the area affected by the lightning strike according to the distance from the center point of the affected area to the center point of the core stable area; A damage correction factor calculation module is used to calculate the damage correction factor considering the severity of damage to the area affected by the lightning strike according to the crack penetration length inside the affected area; The transmission tower foundation damage degree calculation module is used to calculate the transmission tower foundation damage degree after lightning strike based on the volume of the core stable area, the volume of the affected area, the damage weight coefficient and the damage correction coefficient.

9. A device for determining the degree of damage to a transmission tower foundation after a lightning strike, characterized in that: including memory and processor; The memory is used to store computer program code and transmit the computer program code to the processor; The processor is configured to execute the method according to any one of claims 1 to 7 according to instructions in the computer program code.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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