Modeling method, device and equipment for sling net blocking system and storage medium

Abstract

The invention discloses a modeling method, device and equipment for a sling lifting net blocking system and a storage medium. The method comprises the following steps: acquiring working state parameters of a bearing cable under the overhead line crossing construction working condition, and determining an initial bearing cable curve based on a catenary formula, boundary conditions of suspension points on two sides of the bearing cable and the working state parameters of the bearing cable; constructing a finite element analysis model based on the initial bearing cable curve, and determining stress distribution data and deformation data of the bearing cable based on the finite element model; and under the condition that the stress distribution data and the deformation data meet preset engineering requirements, determining the finite element analysis model as a target mechanical analysis model. The technical effects of accurately simulating the stress and deformation of the bearing cable and guaranteeing the construction safety are achieved.

Description

Technical Field

[0001] This invention relates to the technical field of safety protection during overhead line construction, and in particular to a modeling method, device, equipment, and storage medium for a cable-stayed netting system. Background Technology

[0002] Against the backdrop of large-scale construction of ultra-high-voltage transmission lines, construction scenarios crossing high-risk facilities such as highways, railways, and power lines are becoming increasingly frequent. These projects, due to their large spans, complex environmental loads, and significant safety risks, place extremely high demands on the reliability and adaptability of protection systems.

[0003] The suspension cable and netting system is a core technology for ensuring the safety of overhead power line construction, and its structural performance directly affects the success or failure of the entire project. However, current technologies rely on empirical formulas and manual modeling methods based on simplified assumptions, making it difficult to accurately predict the system's mechanical behavior. Furthermore, when facing diverse crossing conditions, the design process relies on manual parameter adjustments, resulting in low modeling efficiency and susceptibility to human error, severely restricting the precise control of construction safety margins. There is an urgent need in the field to construct an innovative technological system that combines high-precision analytical capabilities with rapid parameter adaptation to meet the optimization needs of ultra-high voltage power line construction. Summary of the Invention

[0004] This invention provides a modeling method, apparatus, equipment, and storage medium for a sling net sealing system, so as to realize the modeling method, apparatus, equipment, and storage medium for a sling net sealing system.

[0005] According to one aspect of the present invention, a modeling method for a sling-and-net enclosure system is provided, the method comprising:

[0006] Obtain the working state parameters of the load-bearing cable under the construction conditions of overhead line crossing, and determine the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable.

[0007] A finite element analysis model is constructed based on the initial load-bearing cable curve, and the force distribution data and deformation data of the load-bearing cable are determined based on the finite element model.

[0008] If the stress distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model.

[0009] According to another aspect of the present invention, a modeling apparatus for a sling-and-net sealing device is provided, the apparatus comprising:

[0010] The parameter acquisition module is used to acquire the working state parameters of the load-bearing cable under the construction conditions of overhead line crossing, and to determine the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable.

[0011] The model building module is used to build a finite element analysis model based on the initial load-bearing cable curve, and to determine the stress distribution data and deformation data of the load-bearing cable based on the finite element model.

[0012] The target model determination module is used to determine the finite element analysis model as the target mechanical analysis model when the force distribution data and the deformation data meet the preset engineering requirements.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] At least one processor;

[0015] and memory that is communicatively connected to at least one processor;

[0016] The memory stores a computer program that can be executed by at least one processor, which is then executed by the at least one processor to enable the at least one processor to perform the modeling method of the sling net enclosure system according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to execute a modeling method for a sling net enclosure system according to any embodiment of the present invention.

[0018] The technical solution of this invention obtains the working state parameters of the load-bearing cable under the construction conditions of overhead line crossings, determines the initial load-bearing cable curve based on the catenary formula and the boundary conditions of the suspension points on both sides of the load-bearing cable and the working state parameters of the load-bearing cable; constructs a finite element analysis model based on the initial load-bearing cable curve, and determines the stress distribution data and deformation data of the load-bearing cable based on the finite element model; when the stress distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model, which solves the technical problem of mechanical analysis and modeling of the suspension cable and net enclosure system in the construction of overhead line crossings, and achieves the technical effect of accurately simulating the stress and deformation of the load-bearing cable and ensuring construction safety.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A flowchart illustrating a modeling method for a cable-stayed net enclosure system provided in an embodiment of the present invention;

[0022] Figure 2a A flowchart illustrating another modeling method for a sling-and-net sealing system provided in an embodiment of the present invention;

[0023] Figure 2b A schematic diagram of the structure of a suspension cable net enclosure system, which is an optional example of a modeling method for another suspension cable net enclosure system provided in an embodiment of the present invention;

[0024] Figure 2c A schematic diagram of the initial load-bearing cable curve of an optional example of a modeling method for a suspension cable net enclosure system provided in an embodiment of the present invention;

[0025] Figure 2d A schematic diagram of the numerical modeling effect between two suspension points based on the catenary equation, as an optional example of a modeling method for a suspension net enclosure system provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of a modeling device for a cable-stayed net sealing system provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the structure of an electronic device for implementing a modeling method for a suspension net sealing system according to an embodiment of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0030] Figure 1 This is a flowchart illustrating a modeling method for a cable-stayed net enclosure system provided in an embodiment of the present invention. This embodiment is applicable to safety protection during overhead line construction. The method can be executed by a modeling device for the cable-stayed net enclosure system, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method specifically includes the following steps:

[0031] S110. Obtain the working state parameters of the load-bearing cable under the construction conditions of the overhead line crossing, and determine the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable.

[0032] The suspension cable and netting system can be understood as a safety protection system during overhead line crossing construction, consisting of suspension cables, netting, and load-bearing cables. Load-bearing cable working state parameters can be understood as key data describing the load-bearing cable under construction conditions, including working condition parameters reflecting the construction environment (such as span distance), material parameters reflecting the characteristics of the load-bearing cable itself (such as weight per unit length), and configuration parameters affecting load distribution (such as the number of suspension cables and netting). The catenary formula can be understood as a mathematical formula for calculating the natural sag shape of a flexible rope (such as the load-bearing cable) under its own weight and load. The boundary conditions of the suspension points on both sides of the load-bearing cable can be understood as the spatial constraint conditions of the support points at both ends of the load-bearing cable. The initial load-bearing cable curve can be understood as the sag shape curve of the load-bearing cable initially calculated based on the catenary formula, boundary conditions, and working state parameters, reflecting the elevation corresponding to each horizontal position of the load-bearing cable.

[0033] Specifically, the working state parameters of the load-bearing cable during overhead line crossing construction are collected; then, combined with the catenary formula and the boundary conditions of the suspension points on both sides of the load-bearing cable, the working state parameters are substituted to calculate the initial load-bearing cable curve, that is, the initial sag shape of the load-bearing cable.

[0034] Optionally, the working state parameters of the load-bearing cable include a first state parameter and a second state parameter; determining the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable includes: solving for the characteristic parameters in the catenary formula based on the first state parameter, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the Newton-Raphson iterative algorithm; wherein, the characteristic parameter is the ratio of the horizontal tension of the load-bearing cable to the weight per unit length; and determining the initial load-bearing cable curve based on the catenary formula, the characteristic parameter, and the second state parameter.

[0035] The first state parameter can be understood as the fundamental data used to solve the characteristic parameters of the catenary formula within the working state parameters of the load-bearing cable. The second state parameter can be understood as the positioning and correction data used to calculate the initial load-bearing cable curve by combining the characteristic parameters and the catenary formula, determining the specific shape and spatial position of the initial load-bearing cable curve. The Newton-Raphson iterative algorithm can be understood as a numerical calculation method for solving nonlinear equations. The characteristic parameters can be understood as the key parameters in the catenary formula.

[0036] Specifically, based on the first state parameters (such as the weight per unit length of the load-bearing cable and the span distance) and the boundary conditions of the suspension points on both sides of the load-bearing cable (such as the height difference between the suspension points), the Newton-Raphson iterative algorithm is used to calculate the characteristic parameters in the catenary formula, namely the ratio of horizontal tension to weight per unit length. Substituting the obtained characteristic parameters into the catenary formula, and combining them with the second state parameters (such as the horizontal distance from the lowest point of the catenary and the height of the suspension points), the elevations corresponding to each horizontal position of the load-bearing cable are calculated, ultimately determining the initial load-bearing cable curve.

[0037] Optionally, the first state parameters include the weight per unit length of the load-bearing cable, the actual length, the span distance, the height difference between the suspension points, and the initial horizontal tension; the second state parameters include the horizontal distance from the lowest point of the catenary, the horizontal distance from the center of the span to the lowest point of the load-bearing cable, the height of the suspension points on both sides of the load-bearing cable, and the height correction parameters.

[0038] The following parameters are defined as follows: **Weight per unit length of the load-bearing cable:** **Actual length of the load-bearing cable:** This refers to the actual cable length between the two suspension points. **Span distance:** This refers to the horizontal distance between the two suspension points of the load-bearing cable. **Suspension point height difference:** This refers to the height difference between the two suspension points of the load-bearing cable. **Initial horizontal tension:** This refers to the initial horizontal tension of the load-bearing cable. **Horizontal distance from the lowest point of the catenary:** This refers to the horizontal distance from a calculated position to the lowest point of the load-bearing cable's sag curve. **Horizontal distance from the center of the span to the lowest point of the load-bearing cable:** This refers to the horizontal distance from the midpoint of the span distance to the lowest point of the load-bearing cable. **Height of the suspension points on both sides of the load-bearing cable:** This refers to the height of the support points at both ends of the load-bearing cable relative to the construction reference surface (such as the ground). **Height correction parameter:** This refers to the correction value used to adjust the elevation of the load-bearing cable.

[0039] Optionally, the catenary formula is as follows:

[0040] ;

[0041] in, To support the cable elevation, It is the horizontal distance from the lowest point of the catenary. For characteristic parameters, For height correction parameters, It is the horizontal distance from the center of the span to the lowest point of the load-bearing cable.

[0042] The elevation of the supporting cable can be understood as the height of a certain horizontal position of the supporting cable relative to the construction reference plane. The horizontal distance from the lowest point of the catenary can be understood as the horizontal variable in the catenary formula, using the lowest point of the supporting cable's sag curve as the origin (or reference point), describing the horizontal distance between the calculated position and the lowest point. The characteristic parameter can be understood as the ratio of the horizontal tension of the supporting cable to the weight per unit length.

[0043] Specifically, the horizontal distance from the lowest point of the catenary is used as the horizontal variable, and the characteristic parameter is used as the core coefficient. The correspondence between the horizontal distance and the elevation of the bearing cable is established through a hyperbolic function (such as a hyperbolic cosine function). At the same time, the height correction parameter and the horizontal distance from the center of the span to the lowest point of the bearing cable are incorporated for correction.

[0044] S120. Construct a finite element analysis model based on the initial load-bearing cable curve, and determine the force distribution data and deformation data of the load-bearing cable based on the finite element model.

[0045] The finite element analysis model can be understood as a numerical model constructed using computer software, which discretizes the load-bearing cable and related components into multiple small elements. Stress distribution data can be understood as the mechanical response data of various parts of the load-bearing cable calculated using the finite element model. Deformation data can be understood as the morphological change data of the load-bearing cable calculated using the finite element model.

[0046] Specifically, a finite element analysis model is built based on the initial load-bearing cable curve; the model is run to calculate and obtain the force distribution data (such as tension at each location) and deformation data (such as sag at each location) of the load-bearing cable.

[0047] Optionally, the construction of the finite element analysis model based on the initial load-bearing cable curve includes:

[0048] Calculate the maximum working tension of the initial load-bearing cable curve. If the maximum working tension meets the preset maximum allowable working tension, construct a finite element analysis model based on the working state parameters of the load-bearing cable and the maximum working tension of the initial load-bearing cable curve.

[0049] The maximum working tension of the initial load-bearing cable curve can be understood as the maximum tensile force of the load-bearing cable under working conditions, calculated using theoretical formulas based on the initial load-bearing cable curve. The preset maximum allowable working tension can be understood as the maximum allowable tensile force limit pre-set based on the material properties and construction safety margin of the load-bearing cable. The value is usually less than the ultimate breaking tension of the load-bearing cable and can be preset based on experience. This embodiment does not impose specific restrictions on it.

[0050] Specifically, based on the initial load-bearing cable curve, the maximum working tension corresponding to the initial load-bearing cable curve is calculated using theoretical formulas, such as those combining the tension calculation formulas for the unit length weight of the load-bearing cable, span, and sag. The maximum working tension is compared with the preset maximum allowable working tension. If the maximum working tension meets the requirements (i.e., does not exceed the preset maximum allowable working tension), the modeling phase begins. Using the load-bearing cable's working state parameters (such as material parameters and operating condition parameters) and the maximum working tension of the initial load-bearing cable curve as core input data, a finite element analysis model is built to ensure that the model accurately reflects the actual stress foundation of the load-bearing cable.

[0051] S130. If the force distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model.

[0052] The preset engineering requirements can be understood as judgment criteria set based on construction safety specifications and load-bearing cable performance limits, including restrictions on the maximum tension and maximum sag of the load-bearing cable. These can be preset based on experience, and this embodiment does not impose specific restrictions on them. The target mechanical analysis model can be understood as a finite element analysis model that has been verified to meet the preset engineering requirements in terms of force distribution data and deformation data, and can be used to guide actual construction.

[0053] Specifically, the obtained stress distribution data and deformation data are compared with the preset engineering requirements; if both meet the requirements (such as the maximum tension not exceeding the limit and the maximum sag meeting the safety standard), the current finite element analysis model is determined as the target mechanical analysis model for subsequent engineering guidance.

[0054] Optionally, if the force distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model, including:

[0055] If the maximum tension in the stress distribution data does not exceed the allowable tension of the bearing cable, and the maximum sag in the deformation data does not exceed the preset construction safety limit, the finite element analysis model is determined as the target mechanical analysis model.

[0056] The allowable tension of the load-bearing cable can be understood as the maximum permissible tension value determined based on the material strength and safety factor of the load-bearing cable. The preset construction safety limit can be understood as the maximum sag limit of the load-bearing cable set based on the safety requirements of crossing the construction scenario. It can be preset based on experience, and this embodiment does not impose specific restrictions on it.

[0057] Specifically, the maximum tension value of the bearing cable is extracted from the stress distribution data; this value is then compared with the allowable tension of the bearing cable to determine whether the maximum tension does not exceed the allowable tension. The maximum sag value of the bearing cable is extracted from the deformation data; this value is then compared with the preset construction safety limit to determine whether the maximum sag does not exceed the limit. If both the maximum tension and maximum sag are satisfied, the current finite element analysis model is determined as the target mechanical analysis model; if either result is not satisfied, the parameters need to be adjusted and the model rebuilt.

[0058] The technical solution of this invention obtains the working state parameters of the load-bearing cable under the construction conditions of overhead line crossings, determines the initial load-bearing cable curve based on the catenary formula and the boundary conditions of the suspension points on both sides of the load-bearing cable and the working state parameters of the load-bearing cable; constructs a finite element analysis model based on the initial load-bearing cable curve, and determines the stress distribution data and deformation data of the load-bearing cable based on the finite element model; when the stress distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model, which solves the technical problem of mechanical analysis and modeling of the suspension cable and net enclosure system in the construction of overhead line crossings, and achieves the technical effect of accurately simulating the stress and deformation of the load-bearing cable and ensuring construction safety.

[0059] Figure 2a This is a flowchart illustrating another modeling method for a suspension net enclosure system provided by an embodiment of the present invention. Based on the above embodiments, this embodiment is a further optimization. Specific implementation details can be found in the technical solution of this embodiment. Technical terms that are the same as or corresponding to those in the above embodiments will not be repeated here. Figure 2a As shown, the method specifically includes the following steps:

[0060] S210. Obtain the working state parameters of the load-bearing cable under the construction conditions of the overhead line crossing, and determine the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable.

[0061] S220. Construct a finite element analysis model based on the initial load-bearing cable curve, and determine the force distribution data and deformation data of the load-bearing cable based on the finite element model.

[0062] S230. If the force distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model.

[0063] S240. Based on the target mechanical analysis model, simulate the stress changes of the load-bearing cable under multiple construction stages, wherein the construction stages include the cable and net installation stage, the conductor traction stage, and the system dismantling stage.

[0064] The construction phase can be understood as the complete construction process of the cable-stayed netting system, from installation to dismantling. The cable-stayed netting installation phase can be understood as the initial stage of construction, where the cables and netting are gradually installed onto the supporting cables. The conductor traction phase can be understood as the middle stage of construction, where the conductors are moved along the netting using equipment. The system dismantling phase can be understood as the later stage of construction, where the cables, netting, and supporting cables are gradually removed.

[0065] Specifically, the target mechanical analysis model is invoked to simulate the operation process of three key construction stages: installation of the suspension cable and net, traction of the conductor, and dismantling of the system. For example, the gradual loading of the suspension cable and net and the application of the conductor traction force are simulated, and the stress changes of the load-bearing cable at each stage are calculated.

[0066] S250: For each construction stage, output the dynamic stress peak value and corresponding location of the load-bearing cable at that stage to detect the key stress points of the load-bearing cable.

[0067] The dynamic stress peak value can be understood as the maximum tension value that occurs when the stress on the load-bearing cable changes dynamically with the construction operation during a certain construction stage. It is the key extreme value of the load-bearing cable stress during that stage and needs to be closely monitored. The key stress points of the load-bearing cable can be understood as the locations on the load-bearing cable where the stress is large or the stress changes drastically, such as the connection point between the cable and the net, and the vicinity of the suspension point. These locations are prone to excessive stress during construction and need to be closely monitored.

[0068] Specifically, for each construction stage, the dynamic stress peak value (i.e., the maximum tension value) of the load-bearing cable at that stage is extracted from the simulation results, and the specific location of the peak value is determined. Based on the dynamic stress peak value and its corresponding location, the key stress points of the load-bearing cable at each construction stage are identified, providing a basis for the detection of key stress points in actual construction and ensuring construction safety.

[0069] The technical solution of this invention simulates construction stages such as cable and net installation, conductor traction, and system dismantling, and outputs the dynamic stress peak value and corresponding position of the load-bearing cable. This enables accurate prediction and detection of key stress points of the load-bearing cable at each construction stage, effectively reducing safety risks caused by abnormal stress of the load-bearing cable at different construction stages, and providing a reliable basis for safety management and key monitoring during construction.

[0070] In one possible implementation, the modeling method for the sling-and-net enclosure system in this embodiment specifically includes the following steps:

[0071] Step 1: Input the working status parameters of the load-bearing cable according to the construction conditions of the overhead line crossing, and use the working status parameters of the load-bearing cable as the modeling parameters for the overhead line crossing construction cable-stayed netting system.

[0072] Figure 2b A schematic diagram of the structure of a suspension cable net enclosure system, which is an optional example of a modeling method for a suspension cable net enclosure system provided in an embodiment of the present invention. Figure 2bAs shown. Modeling parameters include working condition parameters, material parameters, and the number of suspension cables and nets. Working condition parameters include span distance, suspension point height difference, design wind speed and direction, etc.; material parameters include the diameter, mass per unit length, and modulus of elasticity of the load-bearing cable, suspension cable, and pulley, etc. During crossing construction, working condition parameters and material parameters are generally determined based on site conditions and equipment materials and cannot be adjusted. Therefore, the number of suspension cables and nets, as a factor that greatly affects the stress on the load-bearing cable and the performance of the netting, is used as an adjustment parameter. In the trial calculation stage based on theoretical formulas, the number of suspension cables and nets is pre-input based on construction experience and is further used after meeting the initial theoretical formula tension requirements.

[0073] Step 2: Determine the initial load-bearing cable curve.

[0074] Figure 2c This is a schematic diagram of the initial load-bearing cable curve, representing an optional example of a modeling method for a suspension cable-net enclosure system provided in an embodiment of the present invention. Figure 2c As shown, the load-bearing cable suspension model between the two suspension points is based on the catenary equation. The catenary formula is:

[0075]

[0076] in, To support the cable elevation, It is the horizontal distance from the lowest point of the catenary. For characteristic parameters, For height correction parameters, It is the horizontal distance from the center of the span to the lowest point of the load-bearing cable.

[0077]

[0078] in, , For the elevation difference, , These refer to the suspension heights on the left and right sides, respectively.

[0079] Among them, two suspension points , Boundary conditions must be met:

[0080]

[0081] Feature parameters The ratio of horizontal tension to weight per unit length of cable is represented by an iterative algorithm.

[0082] The steps are as follows:

[0083] The relationship between the length of the load-bearing cable and the span and elevation difference is determined by the following physical equation:

[0084]

[0085] in, As an intermediate variable:

[0086]

[0087] Define about Nonlinear equations:

[0088]

[0089] Regarding The nonlinear equations were solved iteratively using the Newton-Raphson method.

[0090] Step 3: Based on the working state parameters of the load-bearing cable, determine the maximum tension of the load-bearing cable during operation according to the maximum tension calculation expression. To analyze its stress state, the expression for calculating the maximum tension is:

[0091]

[0092] in, The horizontal tension of the load-bearing cable; The elevation difference angle is the height difference between the support point of the load-bearing cable (for double-supported aerial cableways) or the support point of the load-bearing cable with the largest span within the tension section (for multi-supported cableways). The span between the support points of the load-bearing cable (for double-supported aerial cableways) or the maximum span within the tension section (for multi-supported cableways); The weight per unit length of the load-bearing cable; The mass of a single concentrated load; This represents the average value of adjacent intervals for each concentrated load; The sag of the cable is defined as the angle of the load when the center of the concentrated load acts on the midpoint of the span (for double-supported aerial cableways) or on the midpoint of the maximum span within the tension section (for multi-supported cableways).

[0093] Step 4: Determine if the maximum working tension meets the maximum allowable working tension. If it does not meet the requirement, return to Step 1 to readjust the modeling parameters; if it does meet the requirement, continue to Step 5.

[0094] Step 5: Call the APDL code generation module to establish a finite element analysis model. Based on the finite element model, determine the stress distribution data and deformation data of the load-bearing cable. If the stress distribution data and the deformation data meet the preset engineering requirements, determine the finite element analysis model as the target mechanical analysis model.

[0095] The APDL code generation module includes:

[0096] Define the load-bearing cable curve and define the key points at the connection points between the cable and the net;

[0097] Select the element type, perform finite element discretization, and define the material parameters and element geometric parameters;

[0098] Define boundary conditions;

[0099] Define the loads (working load, wind load) and define the contact between the load-bearing cable and the sliding block.

[0100] Step 6: Run the target mechanics analysis model and view the results.

[0101] Figure 2d This is a schematic diagram illustrating the numerical modeling effect between two suspension points based on the catenary equation, as an optional example of a modeling method for a suspension cable netting system provided in an embodiment of the present invention. The parametric modeling effect is shown below. Figure 2d As shown.

[0102] The technical solution of this invention uses several high-molecular-weight polyethylene fiber rope (fiber rope) cages suspended on the load-bearing cable to limit the movement of the overhead conductor throughout its length. The load-bearing cable, as the core component, determines the stability and safety of the cable-netting and sealing system. Based on the overhead line crossing construction conditions, a parametric modeling device is designed using theoretical formulas and finite element analysis to analyze the stress and deformation characteristics of the load-bearing cable, thereby guiding engineering practice and improving the reliability and safety of overhead line crossing construction.

[0103] Figure 3 This is a schematic diagram of the structure of a modeling device for a suspension netting system provided in an embodiment of the present invention. Figure 3 As shown, the device includes: a parameter acquisition module 310, a model construction module 320, and a target model determination module 330.

[0104] The parameter acquisition module 310 is used to acquire the working state parameters of the load-bearing cable under the construction conditions of the overhead line crossing, and to determine the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable; the model construction module 320 is used to construct a finite element analysis model based on the initial load-bearing cable curve, and to determine the stress distribution data and deformation data of the load-bearing cable based on the finite element model; the target model determination module 330 is used to determine the finite element analysis model as the target mechanical analysis model when the stress distribution data and the deformation data meet the preset engineering requirements.

[0105] The technical solution of this invention obtains the working state parameters of the load-bearing cable under the construction conditions of overhead line crossings, determines the initial load-bearing cable curve based on the catenary formula and the boundary conditions of the suspension points on both sides of the load-bearing cable and the working state parameters of the load-bearing cable; constructs a finite element analysis model based on the initial load-bearing cable curve, and determines the stress distribution data and deformation data of the load-bearing cable based on the finite element model; when the stress distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model, which solves the technical problem of mechanical analysis and modeling of the suspension cable and net enclosure system in the construction of overhead line crossings, and achieves the technical effect of accurately simulating the stress and deformation of the load-bearing cable and ensuring construction safety.

[0106] Optionally, the working state parameters of the bearing cable include a first state parameter and a second state parameter; correspondingly, the parameter acquisition module includes:

[0107] The feature parameter solving unit is used to solve the feature parameters in the catenary formula based on the first state parameters, the boundary conditions of the suspension points on both sides of the carrying cable, and the Newton-Raphson iterative algorithm; wherein, the feature parameter is the ratio of the horizontal tension of the carrying cable to the weight per unit length;

[0108] An initial curve determination unit is used to determine the initial load-bearing cable curve based on the catenary formula, the characteristic parameters, and the second state parameters.

[0109] Optionally, the first state parameters include the weight per unit length of the load-bearing cable, the actual length, the span distance, the height difference between the suspension points, and the initial horizontal tension; the second state parameters include the horizontal distance from the lowest point of the catenary, the horizontal distance from the center of the span to the lowest point of the load-bearing cable, the height of the suspension points on both sides of the load-bearing cable, and the height correction parameters.

[0110] Optionally, the catenary formula is as follows:

[0111]

[0112] in, To support the cable elevation, It is the horizontal distance from the lowest point of the catenary. For characteristic parameters, For height correction parameters, It is the horizontal distance from the center of the span to the lowest point of the load-bearing cable.

[0113] Optionally, the model building module is specifically used for:

[0114] Calculate the maximum working tension of the initial load-bearing cable curve. If the maximum working tension meets the preset maximum allowable working tension, construct a finite element analysis model based on the working state parameters of the load-bearing cable and the maximum working tension of the initial load-bearing cable curve.

[0115] Optionally, the target model determination module is specifically used for:

[0116] If the maximum tension in the stress distribution data does not exceed the allowable tension of the bearing cable, and the maximum sag in the deformation data does not exceed the preset construction safety limit, the finite element analysis model is determined as the target mechanical analysis model.

[0117] Optionally, the device further includes:

[0118] The model simulation module is used to simulate the stress changes of the load-bearing cable under multiple construction stages based on the target mechanical analysis model after the finite element analysis model is determined as the target mechanical analysis model. The construction stages include the cable and net installation stage, the conductor traction stage, and the system dismantling stage.

[0119] The critical stress point determination module is used to output the dynamic stress peak value and corresponding location of the load-bearing cable at each construction stage, so as to detect the critical stress points of the load-bearing cable.

[0120] The modeling device for the sling net sealing device provided in the embodiments of the present invention can execute the modeling method for the sling net sealing device provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0121] Figure 4 This is a schematic diagram of the structure of an electronic device used to implement the modeling method for the suspension net sealing device according to embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0122] like Figure 4As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0123] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0124] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the modeling of a sling net sealing device.

[0125] In some embodiments, modeling of the method sling net sealing device can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of modeling the method sling net sealing device described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform modeling of the method sling net sealing device by any other suitable means (e.g., by means of firmware).

[0126] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0127] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0128] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0129] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0130] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0131] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0132] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0133] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A modeling method for a cable-stayed net enclosure system, characterized in that, include: Obtain the working state parameters of the load-bearing cable under the construction conditions of overhead line crossing, and determine the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable. A finite element analysis model is constructed based on the initial load-bearing cable curve, and the force distribution data and deformation data of the load-bearing cable are determined based on the finite element model. If the stress distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model.

2. The method according to claim 1, characterized in that, The working state parameters of the load-bearing cable include a first state parameter and a second state parameter; the determination of the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable includes: The characteristic parameters in the catenary formula are solved based on the first state parameters, the boundary conditions of the suspension points on both sides of the carrying cable, and the Newton-Raphson iterative algorithm; wherein, the characteristic parameter is the ratio of the horizontal tension of the carrying cable to the weight per unit length. The initial load-bearing cable curve is determined based on the catenary formula, the characteristic parameters, and the second state parameters.

3. The method according to claim 2, characterized in that, The first state parameters include the weight per unit length of the load-bearing cable, the actual length, the span distance, the height difference between the suspension points, and the initial horizontal tension; the second state parameters include the horizontal distance from the lowest point of the catenary, the horizontal distance from the center of the span to the lowest point of the load-bearing cable, the height of the suspension points on both sides of the load-bearing cable, and the height correction parameters.

4. The method according to claim 3, characterized in that, The formula for the catenary is as follows: ； in, To support the cable elevation, It is the horizontal distance from the lowest point of the catenary. For characteristic parameters, For height correction parameters, It is the horizontal distance from the center of the span to the lowest point of the load-bearing cable.

5. The method according to claim 1, characterized in that, A finite element analysis model is constructed based on the initial load-bearing cable curve, including: Calculate the maximum working tension of the initial load-bearing cable curve. If the maximum working tension meets the preset maximum allowable working tension, construct a finite element analysis model based on the working state parameters of the load-bearing cable and the maximum working tension of the initial load-bearing cable curve.

6. The method according to claim 1, characterized in that, If the stress distribution data and the deformation data meet the preset engineering requirements, the finite element analysis model is determined as the target mechanical analysis model, including: If the maximum tension in the stress distribution data does not exceed the allowable tension of the bearing cable, and the maximum sag in the deformation data does not exceed the preset construction safety limit, the finite element analysis model is determined as the target mechanical analysis model.

7. The method according to claim 1, characterized in that, After determining the finite element analysis model as the target mechanical analysis model, the following steps are also included: Based on the target mechanical analysis model, the stress changes of the load-bearing cable under multiple construction stages are simulated. The construction stages include the cable and net installation stage, the conductor traction stage, and the system dismantling stage. For each construction stage, the dynamic stress peak value and corresponding location of the load-bearing cable at that stage are output to detect the key stress points of the load-bearing cable.

8. A modeling device for a cable-stayed net sealing device, characterized in that, include: The parameter acquisition module is used to acquire the working state parameters of the load-bearing cable under the construction conditions of overhead line crossing, and to determine the initial load-bearing cable curve based on the catenary formula, the boundary conditions of the suspension points on both sides of the load-bearing cable, and the working state parameters of the load-bearing cable. The model building module is used to build a finite element analysis model based on the initial load-bearing cable curve, and to determine the stress distribution data and deformation data of the load-bearing cable based on the finite element model. The target model determination module is used to determine the finite element analysis model as the target mechanical analysis model when the force distribution data and the deformation data meet the preset engineering requirements.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and a memory communicatively connected to the at least one processor; The memory stores a computer program that can be executed by the at least one processor, which is then executed by the at least one processor to enable the at least one processor to perform the modeling method for the sling net enclosure system according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the modeling method for the sling net enclosure system according to any one of claims 1-7.

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