Suspension clamp structure optimization method and system

Abstract

The invention discloses a suspension clamp structure optimization method and system, and belongs to the technical field of suspension clamp structure optimization, and the method specifically comprises the steps: carrying out the optimization design of an outlet angle of a suspension clamp, arranging a wear-resistant fiber layer on the inner side of a pressing plate of the suspension clamp, and improving the structure of the suspension clamp through two optimization measures. According to the method, the defect that only the tension and the cross-sectional area of the wire are considered in a wire stress calculation model is overcome, and the wire stress calculation precision of the suspension wire part is improved; and the reliability of wire fatigue calculation is further improved.

Description

Background Art

[0002] The suspension clamp is a hardware used to fix the conductor to the pole tower. It consists of the clamp body, clamp pressure plate, UB type hanging plate, closing pin, and fastening bolts. Figure 1 As shown. Suspension wires generally use standard cast aluminum wire clamps, which are fixed by a pressure plate on the top of the clamp. Two U-shaped bolts are pressed on the conductor pressure plate to keep the pressure between the wire clamp and the pressure plate constant, and the torque applied to the U-shaped bolts is constant. When the suspension wire clamp is connected to the conductor, the conductor needs to be inserted into the body of the suspension wire clamp first, and then the conductor is fixed by the pressure plate and bolts. At present, the connection method between the high-voltage transmission line and the suspension wire clamp generally adopts the "hard connection" method of the pressure plate and the conductor through the fastening bolts. This connection method is easy to cause stress concentration on the conductor at the edge of the suspension wire clamp pressure plate, which makes this part easy to break under the action of continuous and stable wind. In addition, the force on the conductor at the position of the wire clamp is relatively complex. In addition to being affected by the tension and the cross-sectional area of ​​the conductor, the stress of the conductor at the position of the suspension wire clamp is also affected by the pressure of the suspension wire clamp pressure plate and the outlet angle. At present, the location of the fatigue hotspot of overhead transmission lines is generally selected at the outlet angle of the suspension wire clamp. However, in actual projects, the location of the conductor fracture often appears at the edge of the conductor and the suspension wire clamp pressure plate. This shows that if the location of the conductor fatigue hotspot is selected at the outlet angle of the suspension wire clamp, the calculation result of the fatigue stress of the conductor will be unsafe.

[0003] from Figure 1 It can be seen that the connection structure between the suspension clamp and the conductor is a "hard-hard" connection structure. This connection structure between the suspension clamp and the conductor will lead to a significant degree of stress concentration at the contact point between the edge of the suspension clamp pressure plate and the conductor, which is prone to fatigue fracture under the action of continuous and stable wind, such as Figure 2 shown.

[0004] At present, in the calculation of conductor stress, it is generally believed that the stress at the outlet of the suspension clamp is the largest. The stress at this location can be calculated using the following formula: The tension of the conductor at any point within the span range: (1) in, It is the maximum sag of the conductor within the span range; is the conductor spacing; It is the weight of the conductor within the span range.

[0005] According to formula (1), the maximum stress of the conductor is at the exit of the vertical clamp (x=0 or x=La), and its tension is (2) According to formula (2), the maximum stress of the conductor at the suspension clamp is: (3) Where A is the cross-sectional area of ​​the conductor.

[0006] Attached Figure 2 The position where the middle conductor fracture occurs appears at the edge of the conductor and the suspension wire clamp pressure plate, which means that the maximum stress point of the conductor is at the edge of the suspension wire clamp pressure plate instead of at the outlet of the suspension wire clamp. Therefore, it is unsafe to select the location of the maximum stress point of the conductor at the outlet of the suspension wire clamp.

[0007] In addition, it can be seen from Formula 3 that the maximum stress of the conductor is only related to the maximum sag of the conductor, the span, the weight of the conductor and the cross-sectional area of ​​the conductor, and has nothing to do with the tightening force of the suspension clamp bolts and the exit angle. Since the pressure plate and hull of the suspension clamp impose constraints on the conductor, the maximum stress of the conductor in the suspension line is not only related to the maximum sag of the conductor, the span, the weight of the conductor and the cross-sectional area of ​​the conductor, but also to the tightening force of the bolts applied to the pressure plate of the suspension clamp. Figure 3 The influence of the outlet angle of the suspension clamp on the curvature of the conductor is given. It can be seen that when the outlet angle of the suspension clamp is 0, the curvature of the conductor at the suspension line position is large, and the stress concentration of the conductor is significant; when the outlet angle of the suspension clamp is θ, the curvature of the conductor at the suspension clamp position decreases, and the degree of stress concentration of the conductor at this position is also reduced accordingly. The maximum stress of the conductor at the suspension line position is also related to the outlet angle of the suspension clamp. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a method and system for optimizing the structure of a suspension wire clamp in view of the deficiencies in the above-mentioned prior art, so as to solve the technical problem of fatigue fracture of the wire in the suspension wire clamp due to stress concentration, and reduce the probability of fatigue fracture of the wire in the suspension wire clamp due to stress concentration. The present invention adopts the following technical solutions: A method for optimizing a suspension clamp structure comprises the following steps: The outlet angle of the suspension wire clamp is optimized and designed, and a wear-resistant fiber layer is provided on the inner side of the pressure plate of the suspension wire clamp to achieve structural optimization and improvement of the suspension wire clamp.

[0009] Preferably, a wire stress calculation model at the suspension clamp is established, and the outlet angle of the suspension clamp is optimized by using the wire stress calculation model at the suspension clamp. The wire stress calculation model at the suspension clamp is modeled by solid units, and the units are divided by mapping networks. The model parameter is the outlet angle α of the suspension clamp. A finite element model is established by taking half of the structure of the suspension clamp. The contact part between the wire clamp model and the wire is simulated by contact units, and a fixed end constraint is applied to the center of the suspension clamp. The applied load includes the tension applied to the wire and the bolt tightening force. .

[0010] Preferably, the bolt tightening force for:

[0011] in, is the initial tightening torque of the bolt, is the tightening torque coefficient, Is the nominal diameter of the thread.

[0012] Preferably, the edge position of the pressure plate between the conductor and the suspension clamp is the fatigue hot spot position of the overhead transmission line.

[0013] Preferably, the outlet angle of the suspension clamp is optimized as follows: The outlet angle of the suspension clamp θ As an optimization variable, it is substituted into the parametric finite element model and tension is applied to the model. T And bolt tightening force F Then, calculate the maximum principal tensile stress of the conductor at the suspension clamp position. σ ; Determine tensile stress σ Check whether the constraints provided by the optimization model are met. If not, readjust the outlet angle of the suspension clamp. θ , calculate the maximum principal tensile stress of the conductor at the plumb line clamp again σ , until the constraints are met and the objective function is satisfied.

[0014] Preferably, the main tensile stress of the wire at the upper pressure plate of the suspension clamp is σ Minimum is the objective function.

[0015] Preferably, the constraints are specifically: The outlet angle of the bag-type suspension clamp should be between 0°<θ<25°; the outlet angle of the pre-twisted suspension clamp should be between 0°< θ <15°; σ < σ y , σ y is the yield stress of the aluminum wire strand of the conductor.

[0016] Preferably, the wear-resistant fiber layer is arranged on the inner side of the pressure plate of the suspension clamp as follows: A wear-resistant fiber layer is arranged at the concave end of the suspension line clamping plate.

[0017] Preferably, a groove is formed on the concave surface of the pressure plate of the suspension wire clamp; epoxy resin is coated around and on the bottom of the groove; and wear-resistant fiber cloth is bonded into the groove of the suspension wire clamp.

[0018] In a second aspect, an embodiment of the present invention provides a suspension clamp structure optimization system, comprising: The optimization module optimizes the design of the outlet angle of the suspension wire clamp and sets a wear-resistant fiber layer on the inner side of the pressure plate of the suspension wire clamp to achieve structural optimization and improvement of the suspension wire clamp.

[0019] In a third aspect, a computer device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned suspension clamp structure optimization method when executing the computer program.

[0020] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, comprising a computer program, which, when executed by a processor, implements the steps of the above-mentioned suspension wire clamp structure optimization method.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects: A suspension clamp structure optimization method first establishes a wire stress calculation model for the suspension clamp, and uses the model to optimize the outlet angle of the suspension clamp to reduce the stress concentration of the wire at the suspension clamp. On this basis, a wear-resistant fiber layer is set on the inner side of the pressure plate of the suspension clamp, so that the contact state between the pressure plate and the wire is changed from "hard-hard" contact to "hard-soft" contact, which significantly reduces the stress concentration of the wire at the suspension clamp and the probability of fatigue fracture.

[0022] Furthermore, according to the finite element calculation model of the wire stress at the suspension clamp, the mapping network is used to divide the unit, and half of the structure of the suspension clamp is used to establish the finite element model, which can reduce the model calculation scale and improve the model calculation speed; and the contact unit simulation of the contact part between the clamp model and the wire can improve the calculation accuracy of the wire stress at the suspension clamp; a fixed end constraint is applied to the center of the suspension clamp; the applied load includes the tension applied to the wire and the bolt tightening force The purpose of the setting is to apply constraints and loads to the calculation model, so that the stress of the conductor at the suspension clamp can be obtained by the solver of the finite element model.

[0023] Furthermore, the hot spot of the equalizing ring pressure plate is located at the upper edge of the conductor and the suspension line clamp pressure plate. Because the principal tensile stress at this position is the largest and fatigue fracture is most likely to occur, this position is the most dangerous position of the suspension line clamp pressure plate. Setting the hot spot of the equalizing ring pressure plate at the upper edge of the suspension line clamp pressure plate can accurately assess the fatigue damage of the suspension line clamp.

[0024] Furthermore, the outlet angle optimization model of the suspension wire clamp can be used to optimize the design of the outlet angle of the suspension wire clamp, thereby reducing the stress at the contact point between the edge of the suspension wire clamp pressure plate and the wire, improving the degree of stress concentration in this area, and reducing the probability of fatigue fracture of the wire in this area due to excessive principal tensile stress.

[0025] Furthermore, the main tensile stress of the conductor at the upper pressure plate of the suspension clamp is σ The minimum is the objective function, which can ensure that the suspension clamp will not be damaged.

[0026] Furthermore, a fixed end constraint is applied to the center of the suspension clamp; the applied load includes the tension applied to the wire and the bolt tightening force. The purpose of the setting is to apply constraints and loads to the calculation model, so that the stress of the conductor at the suspension clamp can be obtained by the solver of the finite element model.

[0027] Furthermore, a wear-resistant fiber layer is provided on the inner side of the pressure plate of the suspension wire clamp. This structural measure changes the contact mode between the pressure plate of the suspension wire clamp and the conductor, so that the contact state between the pressure plate and the conductor changes from hard-hard contact to hard-soft contact, which significantly reduces the hardness of the contact unit between the pressure plate and the conductor, reduces the degree of stress concentration between the suspension wire clamp and the conductor, and reduces the probability of fatigue fracture of the conductor at the suspension wire clamp.

[0028] Furthermore, a wear-resistant fiber layer is provided on the inner side of the pressure plate of the suspension wire clamp. This structural measure changes the contact mode between the pressure plate of the suspension wire clamp and the conductor, so that the contact state between the pressure plate and the conductor changes from hard-hard contact to hard-soft contact, which significantly reduces the hardness of the contact unit between the pressure plate and the conductor, reduces the degree of stress concentration between the suspension wire clamp and the conductor, and reduces the probability of fatigue fracture of the conductor at the suspension wire clamp.

[0029] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0030] In summary, the present invention establishes a wire stress calculation model for the suspension wire clamp, which can take into account the influence of the pressure of the suspension wire clamp pressure plate and the outlet angle, making up for the defect that only the tension of the wire and the cross-sectional area of ​​the wire are considered in the wire stress calculation model, and improves the calculation accuracy of the wire stress in the suspension wire part; in addition, the position of the fatigue hotspot of the wire of the suspension wire clamp can also be calculated, thereby further improving the reliability of the wire fatigue calculation.

[0031] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is the structural diagram of the suspension wire clamp; Figure 2 This is the damage state diagram of the conductor at the suspension clamp position; Figure 3 The influence of the outlet angle of the suspension clamp on the curvature of the conductor; (a) is the outlet angle of the suspension clamp is 0, (b) is the outlet angle of the suspension clamp is α; Figure 4 It is the force diagram of the conductor unit at the location of the suspension wire clamping plate; Figure 5 The finite element model of the conductor at the suspension clamp position, where (a) is the overall model and (b) is the finite element model; Figure 6 Load and constraint diagram applied to the finite element model of the conductor at the suspension clamp position; Figure 7 This is the distribution diagram of the main tensile stress of the conductor at the suspension clamp position; FIG8 is a structural design diagram of a suspension wire clamp and a wear-resistant wire clamp pressure plate, wherein (a) is a three-dimensional view of the suspension wire clamp, (b) is a top view of the suspension wire clamp, and (c) is a side view of the wear-resistant type; Fig. 9 A schematic diagram of a computer device provided by an embodiment of the present invention; Fig.10 The present invention is a block diagram of an electronic device provided according to an embodiment.

[0033] Among them: 1. Wire clamp body; 2. Wear-resistant wire clamp pressure plate; 3. UB type hanging plate; 4. U-shaped bolt; 5. Closed pin; 6. Bolt hole; 7. Suspension wire clamp pressure plate; 8. Wear-resistant fiber layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0037] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0038] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0039] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0040] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0041] In order to reduce the probability of fatigue fracture of the wire at the suspension clamp position due to stress concentration, the present invention provides a method for optimizing the structure of the suspension clamp; a wire stress calculation model for the suspension clamp position is established, and the model can consider the influence of the pressure of the suspension clamp pressure plate and the outlet angle, which makes up for the defect that only the tension of the wire and the cross-sectional area of ​​the wire are considered in the wire stress calculation model, thereby improving the calculation accuracy of the wire stress at the suspension wire position and reducing the probability of fatigue fracture of the wire at the suspension clamp position due to stress concentration.

[0042] On this basis, the present invention adopts two optimization measures to improve the structure of the suspension clamp: First, the conductor stress calculation model is used to optimize the outlet angle of the suspension clamp to reduce the stress concentration of the conductor at the suspension clamp. Secondly, a wear-resistant fiber layer is set on the inner side of the pressure plate of the suspension wire clamp, so that the contact state between the pressure plate and the conductor is changed from "hard-hard" contact to "hard-soft" contact, which significantly reduces the degree of stress concentration of the conductor at the suspension wire clamp and the probability of fatigue fracture.

[0043] The technical solution provided by the present invention can be applied to the optimization design of the pressure plate and outlet angle of the suspension wire clamp, which is of great significance for reducing the degree of stress concentration of the wire at the suspension wire clamp position and reducing the probability of fatigue fracture accidents of the wire at this position. The present invention is widely used in the optimization design of the suspension wire clamp of high-voltage transmission lines in continuous and stable wind areas at home and abroad.

[0044] The present invention provides a method for optimizing a suspension clamp structure, comprising the following steps: S1. Calculation model of conductor stress at the suspension clamp position; See also Figure 4 , is the force diagram of the conductor unit near the suspension wire clamp plate, it can be seen that: In addition to being affected by tension, the conductor unit near the suspension wire clamp pressure plate is also affected by the clamping force of the suspension wire clamp pressure plate and the outlet angle of the suspension wire clamp. Therefore, the maximum stress of the conductor at the suspension wire clamp position should take into account the influence of the clamping force of the suspension wire clamp pressure plate and the outlet angle of the suspension wire clamp.

[0045] See also Figure 5 According to the stress analysis diagram of the wire at the suspension clamp, the present invention provides a stress calculation model for the wire at the suspension clamp. The model can fully simulate the clamping boundary conditions of the clamp body and the pressure plate, and can simulate the boundary conditions and stress state of the wire under the clamping pressure. The finite element model of the suspension clamp and the wire at this part is modeled by solid units, and the units are divided by mapping networks. The model parameter is the outlet angle α of the suspension clamp. Since the suspension clamp structure is symmetrical and the loading conditions are symmetrical, half of the structure can be used to establish a finite element model, such as Figure 5 (b) shown.

[0046] The contact part between the wire clamp model and the wire is simulated by contact unit. Figure 6 The constraint boundary and load applied by the finite element model of the suspension clamp are given. Due to the symmetry of the suspension clamp structure, a fixed end constraint is applied to the center of the suspension clamp; the applied load includes the tension applied to the wire and the bolt tightening force F. The bolt tightening force The calculation formula is as follows: (4) in, is the initial tightening torque of the bolt, is the tightening torque coefficient, Is the nominal diameter of the thread.

[0047] The method for calculating the stress of the conductor at the suspension wire clamp part proposed in the present invention can take into account the influence of the pressure of the suspension wire clamp bolt, the outlet angle, the tension of the conductor and the cross-sectional area of ​​the conductor, which makes up for the defect that the original calculation model of the stress of the conductor at the suspension wire part only considers the tension of the conductor and the cross-sectional area of ​​the conductor, and improves the calculation accuracy of the stress of the conductor at the suspension wire part.

[0048] right Figure 6 The stress calculation results of the wire at the suspension clamp position after the finite element model is loaded are shown in Figure 7 As shown, it can be seen that: The maximum principal tensile stress of the conductor in the suspension clamp area occurs at the edge of the conductor and the suspension clamp pressure plate. Since the fatigue failure of the conductor is mainly caused by the principal tensile stress, the conductor in this area is most likely to suffer from fatigue breakage.

[0049] Therefore, the location of the fatigue hotspot of the overhead transmission line should be the edge of the conductor and the suspension wire clamp pressure plate, rather than the outlet angle of the suspension wire clamp.

[0050] It can be seen that the wire stress calculation model at the suspension clamp position proposed in the present invention can calculate the position of the fatigue hotspot of the suspension clamp wire, thereby further improving the reliability of the wire fatigue calculation.

[0051] S2. Optimize the design of the hanging line angle; In order to further reduce the probability of fatigue fracture of the wire at the suspension clamp due to stress concentration, the outlet angle of the suspension clamp is optimized according to the calculation results of the principal tensile stress of the wire finite element model at the suspension clamp. The mathematical model for the outlet angle optimization of the suspension clamp is: a) Objective Function The principal tensile stress of the conductor at the upper pressure plate of the suspension clamp σ Minimum; b) Design variables Suspension clamp outlet angle θ ; c) Constraints The outlet angle of the bag-type suspension clamp should be between 0°<θ<25°; the outlet angle of the pre-twisted suspension clamp should be between 0°< θ <15°; σ < σ y , σ y is the yield stress of the aluminum wire strand of the conductor.

[0052] According to the above suspension clamp body structure optimization mathematical model, the steps for optimizing the outlet angle θ on one side of the suspension clamp body are as follows: First, the outlet angle of the suspension clamp θ As an optimization variable, substitute it into Figure 6In the parametric finite element model shown, tension is applied to the model. T And bolt tightening force F Then, calculate the maximum principal tensile stress of the conductor at the suspension clamp position. σ ; Then determine the tensile stress σ Check whether the constraints provided by the optimization model are met. If not, readjust the outlet angle of the suspension clamp. θ , calculate the maximum principal tensile stress of the conductor at the plumb line clamp again σ , until the constraints are met and the objective function is satisfied.

[0053] In summary, the optimization model proposed in the present invention can optimize the design of the outlet angle of the suspension wire clamp, reduce the stress at the contact point between the edge of the suspension wire clamp pressure plate and the wire, improve the degree of stress concentration in this area, and thus reduce the probability of fatigue fracture of the wire in this area due to excessive main tensile stress.

[0054] S3. Optimize the suspension line clamp plate structure.

[0055] Please refer to FIG8 . In order to reduce the main tensile stress of the wire at the edge of the pressure plate at the suspension clamp, the present invention sets a wear-resistant fiber layer at the concave end of the pressure plate at the suspension clamp. The pressure plate with the wear-resistant fiber layer is structured as follows: S301, slotting the concave surface of the pressing plate; S302, coating the periphery and bottom of the groove with epoxy resin; S303, bonding the wear-resistant fiber cloth into the groove of the suspension wire clamp.

[0056] This structural measure changes the contact state between the pressure plate and the conductor from "hard-hard" contact to "hard-soft" contact, significantly reducing the degree of stress concentration between the suspension clamp and the conductor, and thereby reducing the probability of fatigue fracture of the conductor at the suspension clamp.

[0057] It will be appreciated by those skilled in the art that various aspects of the present invention may be implemented as systems, methods or program products. Therefore, various aspects of the present invention may be specifically implemented in the following forms, namely: complete hardware implementation, complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which may be collectively referred to herein as "circuits", "modules" or "platforms".

[0058] In yet another embodiment of the present invention, a suspension wire clamp structure optimization system is provided. The system can be used to implement the above suspension wire clamp structure optimization method. Specifically, the suspension wire clamp structure optimization system includes an optimization module.

[0059] Among them, the optimization module optimizes the design of the outlet angle of the suspension wire clamp, and sets a wear-resistant fiber layer on the inner side of the pressure plate of the suspension wire clamp to achieve structural optimization and improvement of the suspension wire clamp.

[0060] In another embodiment of the present invention, a terminal device is provided, which includes a processor and a memory, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the operation of the suspension clamp structure optimization method, including: The outlet angle of the suspension wire clamp is optimized and designed, and a wear-resistant fiber layer is provided on the inner side of the pressure plate of the suspension wire clamp to achieve structural optimization and improvement of the suspension wire clamp.

[0061] In another embodiment of the present invention, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a terminal device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and the extended storage medium supported by the terminal device, and can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that more specific examples (non-exhaustive list) of the computer-readable storage medium here include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM 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 of the above.

[0062] Computer readable storage media also include data signals propagated in baseband or as part of a carrier wave, which carry readable program codes. Such propagated data signals can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The readable storage medium can also be any readable medium other than a readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program code contained on the readable storage medium can be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the above.

[0063] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0064] The processor may load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the method for optimizing the suspension clamp structure in the above embodiment; the processor may load and execute the following steps: The outlet angle of the suspension wire clamp is optimized and designed, and a wear-resistant fiber layer is provided on the inner side of the pressure plate of the suspension wire clamp to achieve structural optimization and improvement of the suspension wire clamp.

[0065] See also Fig. 9 , the terminal device is a computer device, and the computer device 60 of this embodiment includes: a processor 61, a memory 62, and a computer program 63 stored in the memory 62 and executable on the processor 61. When the computer program 63 is executed by the processor 61, the suspension clamp structure optimization method of the embodiment is implemented. To avoid repetition, it is not described one by one here. Alternatively, when the computer program 63 is executed by the processor 61, the functions of each model / unit in the suspension clamp structure optimization system of the embodiment are implemented. To avoid repetition, it is not described one by one here.

[0066] The computer device 60 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The computer device 60 may include, but is not limited to, a processor 61 and a memory 62. Those skilled in the art will appreciate that Fig. 9 This is only an example of the computer device 60 and does not constitute a limitation of the computer device 60. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the computer device may also include input and output devices, network access devices, buses, etc.

[0067] The processor 61 may be a central processing unit (CPU), or other general-purpose processors, central processing units, graphics processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, data processing logic based on quantum computing, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0068] The memory 62 may be an internal storage unit of the computer device 60, such as a hard disk or memory of the computer device 60. The memory 62 may also be an external storage device of the computer device 60, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the computer device 60.

[0069] Furthermore, the memory 62 may include both an internal storage unit of the computer device 60 and an external storage device. The memory 62 is used to store computer programs and other programs and data required by the computer device. The memory 62 may also be used to temporarily store data that has been output or is to be output.

[0070] Any reference to a memory, database or other medium used in the embodiments provided in the present application may include at least one of a non-volatile and a volatile memory. Non-volatile memory may include a read-only memory (ROM), a magnetic tape, a floppy disk, a flash memory, an optical memory, a high-density embedded non-volatile memory, a resistive random access memory (ReRAM), a magnetic random access memory (MRAM), a ferroelectric random access memory (FRAM), a phase change memory (PCM), a graphene memory, etc. Volatile memory may include a random access memory (RAM) or an external cache memory, etc. As an illustration and not limitation, RAM may be in various forms, such as a static random access memory (SRAM) or a dynamic random access memory (DRAM), etc.

[0071] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0072] See also Fig.10The terminal device is an electronic device 600, which is in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: at least one processing unit 610, at least one storage unit 620, a bus 630 connecting different platform components (including the storage unit 620 and the processing unit 610), a display unit 640, etc.

[0073] The storage unit stores program codes, which can be executed by the processing unit 610, so that the processing unit 610 performs the steps according to various exemplary embodiments of the present invention described in the above method section of this specification. For example, the processing unit 610 can perform the following steps: Figure 1 Follow the steps shown in .

[0074] The storage unit 620 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 6201 and / or a cache memory unit 6202 , and may further include a read-only memory unit (ROM) 6203 .

[0075] The storage unit 620 may also include a program / utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0076] Bus 630 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0077] The electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 600, and / or communicate with any device that enables the electronic device 600 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 650. Furthermore, the electronic device 600 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 660. The network adapter 660 may communicate with other modules of the electronic device 600 via a bus 630. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, etc.

[0078] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0079] See also Figure 1 , a structural diagram of the suspension wire clamp is given. It can be seen that the suspension wire clamp is composed of several parts, including the wire clamp body, wire clamp pressure plate, UB-type hanging plate, closed pin, and fastening bolts. The suspension wire generally uses a standard cast aluminum wire clamp. The clamp is fixed by a pressure plate above. Two U-shaped bolts are pressed on the conductor pressure plate to keep the pressure between the wire clamp and the pressure plate constant. The torque applied to the U-shaped bolt is constant. When the suspension wire clamp is connected to the conductor, the conductor needs to be inserted into the body of the suspension wire clamp first, and then fixed by the pressure plate and bolts.

[0080] See also Figure 2 , the damage state of the conductor at the position of the suspension clamp is given. It can be seen that this connection structure between the suspension clamp and the conductor will cause obvious stress concentration at the contact point between the edge of the suspension clamp pressure plate and the conductor, which is easy to cause fatigue fracture under the action of continuous stable wind.

[0081] See also Figure 3 , the influence of the outlet angle of the suspension clamp on the curvature of the conductor is given. It can be seen that when the outlet angle of the suspension clamp is 0, the curvature of the conductor at the suspension line position is large, and the stress concentration of the conductor is significant; when the outlet angle of the suspension clamp is θ, the curvature of the conductor at the suspension clamp position is reduced, and the degree of stress concentration of the conductor at this position is also reduced accordingly. The maximum stress of the conductor at the suspension line position is also related to the outlet angle of the suspension clamp.

[0082] See also Figure 4 , is the force diagram of the conductor unit near the suspension wire clamp pressure plate. It can be seen that: in addition to being affected by tension, the conductor unit near the suspension wire clamp pressure plate is also affected by the clamping force of the suspension wire clamp pressure plate and the outlet angle of the suspension wire clamp. Therefore, the maximum stress of the conductor at the suspension wire clamp position should take into account the influence of the clamping force of the suspension wire clamp pressure plate and the outlet angle of the suspension wire clamp.

[0083] See also Figure 5 , which is the finite element model of the conductor at the suspension clamp. The finite element model of the suspension clamp and the conductor at this position is modeled using solid elements, and the units are divided using mapping networks. The model parameter is the outlet angle α of the suspension clamp. Since the suspension clamp structure is symmetrical and the loading conditions are symmetrical, half of the structure can be used to establish a finite element model, and the contact part between the clamp model and the conductor is simulated using contact elements.

[0084] See also Figure 6 , the constraint boundary and load applied by the finite element model of the suspension clamp are given. Due to the symmetry of the suspension clamp structure, a fixed end constraint can be applied to the center of the suspension clamp; the applied load includes the tension T applied to the wire and the bolt tightening force F.

[0085] See also Figure 7 , is the distribution diagram of the main tensile stress of the conductor at the suspension clamp. It can be seen that the maximum main tensile stress of the conductor at the suspension clamp occurs at the edge of the conductor and the suspension clamp pressure plate. Since the fatigue failure of the conductor is mainly caused by the main tensile stress, the conductor in this area is most likely to break due to fatigue. Therefore, the location of the fatigue hotspot of the overhead transmission line should be the edge of the conductor and the suspension clamp pressure plate, rather than the location of the outlet angle of the suspension clamp.

[0086] Please refer to Figure 8, which is a structural design diagram of the wear-resistant pressure plate of the suspension wire clamp. In order to reduce the main tensile stress of the wire at the edge of the pressure plate of the suspension wire clamp, the present invention sets a wear-resistant fiber layer at the concave end of the pressure plate of the suspension wire clamp.

[0087] In summary, the present invention provides a method and system for optimizing the structure of a suspension wire clamp. First, a wire stress calculation model for the suspension wire clamp is established. The model can take into account the influence of the pressure of the suspension wire clamp pressure plate and the outlet angle, which makes up for the defect that only the tension of the wire and the cross-sectional area of ​​the wire are considered in the wire stress calculation model, and improves the calculation accuracy of the wire stress in the suspension wire part. In addition, the model can also calculate the position of the fatigue hotspot of the wire of the suspension wire clamp, thereby further improving the reliability of the wire fatigue calculation, and can reduce the probability of fatigue fracture of the wire in the suspension wire clamp part due to stress concentration.

[0088] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0089] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0090] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0091] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0092] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0093] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0094] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0095] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0096] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0097] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0098] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A method for optimizing a suspension clamp structure, characterized in that: The following steps are involved: The outlet angle of the suspension wire clamp is optimized and a wear-resistant fiber layer is provided on the inner side of the pressure plate of the suspension wire clamp to achieve structural optimization and improvement of the suspension wire clamp.

2. The method for optimizing the suspension clamp structure according to claim 1, characterized in that: A wire stress calculation model for the suspension clamp is established, and the outlet angle of the suspension clamp is optimized by using the wire stress calculation model for the suspension clamp. The wire stress calculation model for the suspension clamp is modeled by solid elements, and the units are divided by mapping networks. The model parameter is the outlet angle α of the suspension clamp. A finite element model is established by taking half of the structure of the suspension clamp. The contact part between the clamp model and the wire is simulated by contact elements, and a fixed end constraint is applied to the center of the suspension clamp. The applied load includes the tension applied to the wire and the bolt tightening force. .

3. The method for optimizing the suspension clamp structure according to claim 2, characterized in that: Bolt tightening force for: in, is the initial tightening torque of the bolt, is the tightening torque coefficient, Is the nominal diameter of the thread.

4. The method for optimizing the suspension clamp structure according to claim 2, characterized in that: The edge of the pressure plate between the conductor and the suspension clamp is the fatigue hotspot of the overhead transmission line.

5. The method for optimizing the suspension clamp structure according to claim 1, characterized in that: The specific optimization design of the outlet angle of the suspension clamp is as follows: The outlet angle of the suspension clamp θ As an optimization variable, it is substituted into the parametric finite element model and tension is applied to the model. T And bolt tightening force F Then, calculate the maximum principal tensile stress of the conductor at the suspension clamp position. σ ; Determine tensile stress σ Check whether the constraints provided by the optimization model are met. If not, readjust the outlet angle of the suspension clamp. θ , calculate the maximum principal tensile stress of the conductor at the plumb line clamp again σ , until the constraints are met and the objective function is satisfied.

6. The method for optimizing the suspension clamp structure according to claim 5, characterized in that: The main tensile stress of the conductor at the upper pressure plate of the suspension clamp σ Minimum is the objective function.

7. The method for optimizing the suspension clamp structure according to claim 5, characterized in that: The specific constraints are: The outlet angle of the bag-type suspension clamp should be between 0°<θ<25°; the outlet angle of the pre-twisted suspension clamp should be between 0°< θ <15°; σ < σ y , σ y is the yield stress of the aluminum wire strand of the conductor.

8. The method for optimizing the suspension clamp structure according to claim 1, characterized in that: The wear-resistant fiber layer is arranged on the inner side of the pressure plate of the suspension clamp as follows: A wear-resistant fiber layer is arranged at the concave end of the suspension line clamping plate.

9. The method for optimizing the suspension clamp structure according to claim 8, characterized in that: A groove is formed on the concave surface of the pressure plate of the suspension wire clamp; epoxy resin is coated around and on the bottom of the groove; and wear-resistant fiber cloth is bonded into the groove of the suspension wire clamp.

10. A suspension clamp structure optimization system, characterized in that: include: The optimization module optimizes the design of the outlet angle of the suspension wire clamp and sets a wear-resistant fiber layer on the inner side of the pressure plate of the suspension wire clamp to achieve structural optimization and improvement of the suspension wire clamp.

11. A computer-readable storage medium storing one or more programs, characterized in that: The one or more programs include instructions, which, when executed by a computing device, cause the computing device to perform the method of any one of claims 1 to 9.

12. A computing device, characterized in that: include: One or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include steps for executing the method described in any one of claims 1 to 9.

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