Numerical simulation method and system for embossed anchor cable, medium and program product

Abstract

The invention discloses a numerical simulation method and system for an embossed anchor cable, a medium and a program product, and the method comprises the steps: obtaining and recognizing the design and manufacturing information of the embossed anchor cable, so as to obtain an embossing process parameter and an anchor cable structure feature; according to the embossing process parameters and the anchor cable structure characteristics, a preset mechanical property parameter table is obtained; setting a corresponding stress-strain threshold value based on the mechanical property parameter table and the structural characteristics of the anchor cable; carrying out numerical simulation analysis in a preset numerical simulation analysis model, wherein the content of the numerical simulation analysis comprises shearing mechanical behaviors of an embossed structure, an anchoring agent and an anchoring interface in the embossed anchor cable; obtaining a simulation output result based on the design and manufacturing information and the mechanical property parameter table, and comparing the simulation output result with a stress-strain threshold value to obtain a simulation test result; based on the simulation test result, determining the optimal jacking distance of the knurling process parameters corresponding to the knurling anchor cable; the design and manufacturing precision of the embossed anchor cable is improved.

Description

Technical Field

[0001] The present application relates to the technical field of embossed anchor cables, and in particular to a numerical simulation method, system, medium and program product for embossed anchor cables. Background Art

[0002] As an important civil engineering component, embossed anchor cables are widely used in structures such as bridges, tunnels, and slope stabilization. Their main function is to transfer loads to the foundation or rock mass through prestressing, thereby ensuring the safety and stability of the structure. With the continuous improvement of safety requirements in modern engineering and the increasing demand for applications under complex geological conditions, traditional design and manufacturing methods have gradually exposed their shortcomings. Therefore, it is particularly important to develop a method that can accurately simulate the performance of embossed anchor cables.

[0003] Traditional numerical simulation methods are often based on standard parts or common specifications for modeling, which makes it difficult to fully consider the special requirements of specific engineering projects, resulting in a certain deviation between the simulation results and the actual situation; and the shear mechanical behavior of the anchoring interface between the embossed structure and the anchoring agent is one of the key factors affecting the overall performance of the embossed anchor cable; however, the existing technology rarely considers the difference in shear mechanical properties of the anchoring interface between the embossed section and the non-embossed section when performing numerical simulation analysis, which in turn affects the performance prediction of the final product.

[0004] In summary, with respect to the above-mentioned related technologies, there is a problem of poor precision in the design and manufacturing of embossed anchor cables, which needs to be improved. Summary of the Invention

[0005] In order to improve the accuracy of design and manufacturing of embossed anchor cables, the present application provides a numerical simulation method, system, medium and program product for embossed anchor cables.

[0006] In the first aspect, the invention objectives of this application are achieved by adopting the following technical solutions: A numerical simulation method for an embossed anchor cable is applied to an embossed anchor cable provided with a measurement structure, the method comprising: Obtain and identify the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and anchor cable structural characteristics; Obtaining a preset mechanical performance parameter table according to the embossing process parameters and the anchor cable structural characteristics; Based on the mechanical performance parameter table and the structural characteristics of the anchor cable, a corresponding stress-strain threshold is set; Performing a numerical simulation analysis in a preset numerical simulation analysis model, wherein the content of the numerical simulation analysis includes the shear mechanical behavior of the embossed structure, the anchoring agent, and the anchoring interface in the embossed anchor cable; obtaining a simulation output result based on the design and manufacturing information and the mechanical property parameter table; and comparing the simulation output result with the stress-strain threshold to obtain a simulation test result; Based on the simulation test results, the optimal jacking distance of the embossing anchor cable corresponding to the embossing process parameters is determined.

[0007] By adopting the above technical solution, the embossing process parameters include the embossing process parameters used and the target embossing head parameters, and the target embossing head parameters include the embossing length, embossing diameter and embossing undulation angle of the embossed section of the embossed structure; first, the design and manufacturing information of the embossed anchor cable is obtained and identified, and the embossing process parameters and anchor cable structural characteristics are accurately obtained, which is conducive to ensuring that the design and manufacturing process of each embossed anchor cable can be carried out in accordance with the preset standards, thereby significantly improving the consistency and quality control level of the product; then, according to the embossing process parameters and anchor cable structural characteristics, the most appropriate mechanical property parameter table is selected from the preset mechanical property database, so that the simulation results are closer to the actual application scenarios, helping engineers to more accurately predict the performance of the embossed anchor cable under different working conditions to optimize its mechanical properties; in the next step, based on the selected mechanical property parameter table and anchor cable structural characteristics, the corresponding stress-strain threshold is set, so that the results of the numerical simulation analysis can more realistically reflect the usage scenarios of complex embossed anchor cables, thereby improving the accuracy and reliability of the simulation output results. ; Furthermore, the present application also provides a stress-strain threshold value set based on the mechanical performance parameter table and the anchor cable structure characteristics, which is conducive to ensuring that the numerical simulation analysis can reflect the stress distribution in the real world, and distinguish the difference in the shear mechanical properties of the anchoring interface between the embossed section and the non-embossed section of the embossed structure in the embossed anchor cable, and perform simulation analysis of the shear mechanical properties to obtain the optimal jacking distance, thereby obtaining a simulation output result covering the behavior under static conditions and the response that can simulate dynamic loading conditions. Finally, the simulation output result is compared with the stress-strain threshold value to obtain a more reliable simulation test result. The simulation of the present application is conducive to ensuring the safe and reliable operation of the embossed anchor cable. Efficient simulation can also reduce the number of tests and the cost of physical testing. During actual manufacturing, the operator observes the measurement data displayed on the measurement structure based on the optimal process distance to manufacture the embossed structure, which is conducive to improving the operator's operation accuracy and manufacturing accuracy, thereby improving the accuracy of the design and manufacturing of the embossed anchor cable and improving the overall economic benefits.

[0008] In a preferred embodiment of the present application, the acquisition and identification of the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and the anchor cable structural characteristics specifically includes: Obtaining design drawing information, material property information, and embossing parameters during the manufacturing process of the embossed anchor cable, wherein the embossing parameters include the embossing length, embossing diameter, and embossing undulation angle of the embossed section of the embossed structure; Identifying the design information to determine embossing process parameters; The material property information and manufacturing process parameters are identified to determine the geometric shape, size, material properties and connection method of the embossed anchor cable, and obtain the structural characteristics of the anchor cable.

[0009] By adopting the above technical solution, based on the design drawing information, material property information and embossing parameters in the manufacturing process (such as embossing length, embossing diameter and embossing undulation angle) of the embossed anchor cable, the embossing process parameters and the structural characteristics of the anchor cable can be determined more accurately; by accurately identifying the embossing process parameters and the structural characteristics of the anchor cable, the actual situation in the manufacturing process can be considered in the design stage, thereby better guiding the design, making the design and manufacturing more consistent, and reducing the possibility of design changes.

[0010] In a preferred embodiment of the present application, the method further comprises: in the preset numerical simulation analysis model, using multi-stage plastic deformation characteristics to analyze the shear stress changes of the embossed segment anchoring interface under different shear slip amounts, so as to set the multi-segment shear slip relationship of the embossed segment anchoring interface of the embossed structure, specifically including: The relationship between shear stress and shear slip is divided into four stages: In the initial stage, when the shear slip s is less than or equal to the first critical value s1, the shear stress remains at the maximum value τ1; When the shear slip s is greater than s1 but less than or equal to the first critical value s2, the shear stress decreases linearly from τ1 to the residual strength τ2; when the shear slip s is greater than s2 but less than or equal to the third critical value s3, the shear stress decreases from τ2 to a lower strength τ3; When the shear slip s is greater than s3, the shear stress stabilizes at the lowest value τ4.

[0011] By adopting the above technical solution, the multi-stage plastic deformation characteristics are used to analyze the shear stress changes of the embossed segment anchoring interface under different shear slip amounts, which more realistically reflects the stress conditions of the embossed anchor cable under actual working conditions and improves the accuracy of the numerical simulation; by dividing the relationship between shear stress and shear slip amount into four specific stages, the mechanical behavior of the embossed segment anchoring interface of the embossed structure can be more finely characterized, making the simulation results closer to the actual situation, which helps to discover potential problem points and optimize them in advance.

[0012] In a preferred example of the present application, in the preset numerical simulation analysis model, the bond-slip relationship of the anchoring interface of the non-embossed section is also set, specifically including: At the anchoring interface of the non-embossed section, the shear stress τ a The relationship with shear slip is divided into two stages: In the initial linear growth stage, when the shear slip s is less than or equal to the critical value s a When the shear stress τ a It decays exponentially from the peak Decline, the decay rate is controlled by the preset decay coefficient; When the shear slip s is greater than the critical value s a The shear stress drops rapidly to zero.

[0013] By adopting the above-mentioned technical solution, in order to better reflect the working state of the embossed anchor cable in actual engineering, this application sets the bond-slip relationship of the anchoring interface of the non-embossed section and divides it into two specific stages (initial linear growth stage and rapid decline stage) to more accurately simulate the complex relationship between shear stress and shear slip; specifically, an exponential decay form is introduced to describe the process of shear stress dropping from the peak value, and the decay rate is controlled by a preset attenuation coefficient, so that the simulation results are closer to the actual situation, which not only helps to predict the performance of the embossed anchor cable under different working conditions, but also makes a detailed characterization of the bond-slip relationship of the anchoring interface of the non-embossed section, supplements the multi-stage plastic deformation characteristics analysis of the anchoring interface of the embossed section, and forms a complete mechanical behavior description system.

[0014] In a preferred embodiment of the present application, determining the optimal jacking distance of the embossing anchor cable corresponding to the embossing process parameters based on the simulation test results specifically includes: Based on the simulation test results, i.e., the multi-segment shear-slip relationship, the embossing process parameters are optimized. The specific optimization steps include: collecting experimental test data under multiple different embossing process parameter combinations, including but not limited to performance indicators of jacking distance and maximum bearing capacity; Compare and analyze the experimental test data with the corresponding numerical simulation output results to form a parameter matrix; The correlation coefficient of the parameter matrix is ​​calculated, and based on the correlation coefficient, the embossing length, embossing diameter and embossing undulation angle are adjusted to optimize the embossing structure design until the optimal embossing process parameter combination is found and the optimal jacking distance corresponding to different embossing process parameters is determined.

[0015] By adopting the above technical solution, the numerical simulation output results are formed into a parameter matrix to systematically evaluate the influence of different parameter combinations, thereby realizing the optimization of embossing process parameters and the determination of the optimal parameters; by calculating the correlation coefficient of the parameter matrix, key parameters such as embossing length, embossing diameter and embossing undulation angle are adjusted according to the correlation coefficient to optimize the embossing structure design, and the interaction between the various parameters is clarified through quantitative analysis, providing a clear direction and support for design improvement, and through an iterative optimization process, until the optimal jacking distance corresponding to different embossing process parameters is finally found.

[0016] In a preferred example of the present application, the setting of corresponding stress and strain thresholds based on the mechanical performance parameter table and the anchor cable structural characteristics specifically includes: Setting a first stress-strain threshold according to the structural characteristics of the anchor cable and preset mechanical property setting rules; According to the data in the mechanical property parameter table, the first stress-strain threshold is adjusted to determine the stress-strain threshold suitable for specific embossing process parameters.

[0017] By adopting the above technical solution, the basis for setting the stress-strain threshold is based on the specific embossing anchor cable design rather than general or hypothetical conditions, thereby improving the pertinence and accuracy of the simulation results; by referencing the data in the mechanical property parameter table to adjust the first stress-strain threshold, the stress-strain threshold suitable for specific embossing process parameters is finally determined.

[0018] In a preferred example of the present application: the preset mechanical property setting rules are generated by: obtaining field test parameter values ​​under different geological conditions, and mechanical property test parameter values ​​of the embossed anchor cable under corresponding laboratory conditions; Inputting the field test parameter values ​​and the corresponding laboratory test parameter values ​​into a preset machine learning model to obtain an environmental adaptability coefficient value; the preset machine learning model is used to predict the behavior of the embossed anchor cable under different environments and guide the formulation of mechanical property setting rules; According to the environmental adaptability coefficient value and in combination with specific engineering requirements, mechanical property setting rules applicable to specific geological conditions and embossing process parameters are generated.

[0019] By adopting the above technical solution, the influence of the actual construction environment and the ideal experimental environment are comprehensively considered, and the data from the above two sources are input into the preset machine learning model. This not only improves the accuracy of the prediction, but also enhances the accuracy of the simulation of the behavior of embossed anchor cables in complex environments.

[0020] In the second aspect, the invention objective of this application is achieved by adopting the following technical solutions: A numerical simulation system for embossed anchor cables is applied to the numerical simulation method for embossed anchor cables as described above, and the system comprises: A data acquisition module is used to acquire and identify the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and the structural characteristics of the anchor cable; A parameter table retrieval module is used to obtain a preset mechanical performance parameter table based on the embossing process parameters and the anchor cable structural characteristics; A threshold setting module, configured to set corresponding stress and strain thresholds based on the mechanical performance parameter table and the structural characteristics of the anchor cable; A numerical simulation analysis module is used to perform numerical simulation analysis in a preset numerical simulation analysis model, wherein the content of the numerical simulation analysis includes the shear mechanical behavior of the embossed structure, anchoring agent, and anchoring interface in the embossed anchor cable; obtain simulation output results based on the design and manufacturing information and the mechanical property parameter table, and compare the simulation output results with the stress-strain threshold to obtain simulation test results; A result evaluation output module is used to determine the optimal jacking distance of the embossing anchor cable corresponding to the embossing process parameters based on the simulation test results.

[0021] In a third aspect, the invention objective of this application is achieved by adopting the following technical solutions: A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned numerical simulation method for embossed anchor cables.

[0022] Fourthly, the invention objectives of this application are achieved by adopting the following technical solutions: A computer program product, when running on a numerical simulation system, enables the numerical simulation system to execute the above numerical simulation method for the embossed anchor cable.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. Simulation helps ensure the safe and reliable operation of embossed anchor cables. Efficient simulation can also reduce the number of tests and the cost of physical testing. During actual manufacturing, operators manufacture the embossed structure based on the optimal process distance and the measurement data displayed on the measurement structure. This helps improve the operator's operating accuracy and manufacturing accuracy, thereby improving the accuracy of embossed anchor cable design and manufacturing, and enhancing the overall economic benefits. 2. Not only does the accuracy of the numerical simulation method increase through refined mechanical behavior analysis, but a systematic parameter optimization process also ensures the optimal performance of the embossed anchor cable in design, manufacturing, and application; 3. The accuracy and reliability of the numerical simulation method are improved by setting scientific and reasonable stress-strain thresholds and generating mechanical property setting rules for environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a flow chart of a numerical simulation method for an embossed anchor cable in one embodiment of the present application. DETAILED DESCRIPTION

[0025] The present application is further described in detail below with reference to the accompanying drawings.

[0026] In one embodiment, if Figure 1 As shown, the present application discloses a numerical simulation method for embossed anchor cables, which specifically includes the following steps: S1: Obtain and identify the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and anchor cable structural characteristics.

[0027] In this embodiment, an embossing anchor cable is provided with a measuring structure, for example, a steel ruler with a scale is added to the crossbeam of the embossing machine, so that the operator can accurately control the size specifications of the embossing head; the embossing process parameters include the embossing length, embossing diameter and embossing undulation angle of the embossing section of the embossing structure.

[0028] Specifically, step S1 includes: S11: obtaining design drawing information of the embossed anchor cable, material property information and embossing parameters in the manufacturing process, wherein the embossing parameters include the embossing length, embossing diameter and embossing undulation angle of the embossed section of the embossed structure.

[0029] S12: Identify the design information to determine embossing process parameters.

[0030] Specifically, the key dimensions and position information of the embossing structure are extracted according to the design drawing, and important parameters in the embossing process, such as embossing spacing and embossing frequency, are clarified.

[0031] S13: Identify material property information and manufacturing process parameters to determine the geometric shape, size, material properties and connection method of the embossed anchor cable and obtain the structural characteristics of the anchor cable.

[0032] Specifically, the dimensions of the embossed anchor cable include but are not limited to the length, diameter, and cross-sectional shape of the embossed section and the non-embossed section; the material properties include mechanical performance indicators such as the elastic modulus, Poisson's ratio, and yield strength of the material used for the embossed anchor cable; and the connection method includes the connection method of the various parts of the embossed anchor cable, such as welding, threaded connection, etc.

[0033] S2: Obtain a preset mechanical property parameter table based on the embossing process parameters and the anchor cable structural characteristics.

[0034] In this embodiment, a mechanical property parameter library containing a variety of materials and structural forms is pre-stored in the numerical simulation system, and a mechanical property parameter table that is most suitable for the current embossing process parameters is screened out from the mechanical property parameter library. The mechanical property parameter table includes material name, elastic modulus (GPa), Poisson's ratio ν, yield strength (MPa), and tensile strength (MPa).

[0035] S3: Based on the mechanical properties parameter table and the structural characteristics of the anchor cable, set the corresponding stress and strain thresholds.

[0036] In this embodiment, stress and strain thresholds used in the simulation process are set, and these thresholds are used to distinguish different stages of mechanical behavior (such as elasticity, plasticity, and destruction); initial stress and initial strain are set as the starting points of the simulation analysis, and according to the mechanical performance parameter table, multiple stress and strain thresholds (including stress thresholds and strain thresholds) are defined to distinguish different stages of mechanical behavior. During the simulation process, the thresholds are dynamically adjusted according to actual conditions to ensure that the simulation results are always within a reasonable range; by accurately setting the stress and strain thresholds, the mechanical behavior of the embossed anchor cable under different working conditions can be captured more carefully.

[0037] Specifically, step S3 includes: S31: Setting a first stress-strain threshold according to the structural characteristics of the anchor cable and preset mechanical property setting rules.

[0038] Specifically, first select the industry standard, then define the initial stress and strain threshold ranges for different mechanical behavior stages, and set the initial stress σ0 and initial strain ∈0 as the starting point of the simulation analysis; for example: the stress range in the elastic stage is: σ0 to σ1, and the corresponding strain range is ∈0 to ∈1; the stress range in the plastic stage is: σ1 to σ2, and the corresponding strain range is ∈1 to ∈2; the stress range in the destruction stage is: exceeding σ2, and the corresponding strain is ∈2. According to the structural characteristics of the anchor cable and the preset rules, the initial stress and strain thresholds are set, such as (σ y is the yield strength of the material used in the current embossing structure): Elastic stage: σ0 = 0, σ1 = 0.5 × σ y ; Plastic stage: σ1=×σ y ,σ2=σ y ; Destruction stage: σ2=σ y .

[0039] In this embodiment, the preset mechanical property setting rules are generated in the following manner: 1. Obtain the field test parameter values ​​under different geological conditions and the mechanical performance test parameters of the embossed anchor cable under corresponding laboratory conditions.

[0040] Specifically, monitoring points are set up at the project site, and various types of sensors (such as stress gauges, strain gauges, and temperature sensors) are deployed to monitor the working status of the embossed anchor cables in real time. For example, suitable embossed anchor cables are selected for tunnel engineering projects located in mountainous areas. The geological conditions in this area are complex, the surrounding rock types are diverse, the groundwater is abundant, and there are large temperature differences. In order to ensure that the embossed anchor cables can work normally in such a complex environment, we need to conduct on-site tests, that is, install sensors at different locations in the tunnel to record environmental parameters such as surrounding rock pressure, groundwater level, temperature, and humidity, as well as mechanical parameters such as stress, strain, and deformation of the embossed anchor cables.

[0041] 2. Input the field test parameter values ​​and the corresponding laboratory test parameter values ​​into a preset machine learning model to obtain the environmental adaptability coefficient value; the preset machine learning model is used to predict the behavior of the embossed anchor cable under different environments and guide the formulation of mechanical property setting rules.

[0042] Specifically, in the laboratory test, several embossed anchor cable samples were prepared, and mechanical properties tests were carried out in the laboratory to record key parameters such as yield strength, tensile strength, and elastic modulus.

[0043] In this embodiment, the environmental adaptability coefficient value is used to quantify the degree of influence of different geological conditions (such as surrounding rock type, groundwater level, temperature, etc.) on the mechanical properties of embossed anchor cables; the higher the environmental adaptability coefficient value, the greater the impact of the environment on the embossed anchor cables; conversely, the lower the coefficient value, the smaller the environmental impact.

[0044] The calculation method of the environmental adaptability coefficient value is: Assume that we define the environmental adaptability coefficient value EAC as a mechanical performance index P of the embossed anchor cable under laboratory conditions. lab The same index P under field conditions field Ratio: EAC = P field / P lab For multiple mechanical performance indicators, the weight of each indicator can be comprehensively considered. i , and obtain the comprehensive environmental adaptability coefficient value Where n is the number of mechanical performance indicators, ω i is the weight of the i-th indicator.

[0045] 3. Based on the environmental adaptability coefficient value and combined with specific engineering requirements, generate mechanical property setting rules suitable for specific geological conditions and embossing process parameters.

[0046] Specifically, the mechanical property setting rules include the determination of the mechanical property thresholds after the engineering requirements are determined. For example, if the environmental adaptability coefficient value is high, the stress thresholds at certain stages will be increased accordingly; if the environmental adaptability coefficient value is low, it will be appropriately lowered. The adjusted mechanical property thresholds and other related parameters will be organized into a complete mechanical property setting rule. The content of the mechanical property setting rules covers all necessary mechanical performance indicators and adjustment details.

[0047] For example, if a machine learning model predicts an environmental adaptability coefficient of 1.2 for a particular region, indicating that the environment in that region has a significant impact on the embossed anchor cable, the generated mechanical property setting rules adjust the mechanical property thresholds based on the environmental adaptability coefficient of 1.2 and specific project requirements (such as a high safety level and cost control within a certain range), generating mechanical property setting rules applicable to that region. For example, the upper limit σ2 of the plastic stage and the lower limit σ2 of the failure stage are appropriately increased to ensure that the embossed anchor cable maintains good mechanical properties even in complex environments.

[0048] S32: Adjust the first stress-strain threshold value according to the data in the mechanical property parameter table to determine the stress-strain threshold value suitable for specific embossing process parameters.

[0049] Specifically, according to the specific values ​​in the parameter table, the first stress-strain threshold is appropriately adjusted to make it closer to the actual situation. For example: If the parameter table shows the yield strength σ y The higher it is, the higher the upper limit σ2 of the plastic stage will be.

[0050] If the parameter table shows the tensile strength σ u If it is lower, the lower limit σ2 of the destruction stage should be appropriately lowered.

[0051] This embodiment adopts a dynamic adjustment mechanism, that is, introduces an adaptive algorithm to automatically optimize the threshold setting according to the simulation process to ensure that the results are always reasonable.

[0052] S4: Numerical simulation analysis is performed in a preset numerical simulation analysis model. The content of the numerical simulation analysis includes the shear mechanical behavior of the embossed structure, anchoring agent, and anchoring interface in the embossed anchor cable; simulation output results are obtained based on design and manufacturing information and mechanical property parameter tables, and the simulation output results are compared with the stress-strain threshold to obtain simulation test results.

[0053] In this embodiment, a numerical simulation analysis model is constructed using professional software such as FLAC3D to simulate the mechanical behavior of the embossed anchor cable under different working conditions, especially the shear-slip relationship between the embossed structure and the anchoring agent. The performance of the embossed anchor cable is evaluated by comparing the simulation results with the pre-set stress-strain threshold.

[0054] Specifically, the steps for constructing the numerical simulation analysis model include: Create a cylindrical model: Use FLAC3D software to create a cylindrical model with a diameter and length equal to the length of the entire embossed anchor cable, and divide the mesh.

[0055] Set the constitutive equation and material parameters: Set the elastic modulus and Poisson's ratio according to the surrounding rock material properties to ensure that the model material properties are consistent with the actual situation.

[0056] Fixed boundary condition: The velocity of all nodes on the mesh surface close to the pulling end is set to zero to achieve model fixation.

[0057] Define the shear-slip relationship: Based on the fact that the total overlap length of the embossed and non-embossed segments is equal to the total length of the embossed anchor cable, define multi-stage and two-stage shear-slip relationships for the embossed and non-embossed segments respectively, and input them into the database of the corresponding structural segments.

[0058] Loading and recording data: Set the pulling speed, load uniformly and record the pulling force, displacement and shear slip data until the support system is destroyed.

[0059] Result comparison and verification: Compare the simulated shear stress-shear slip curve with the experimental data, calculate the error and record the improvement measures.

[0060] S5: Based on the simulation test results, determine the optimal jacking distance of the embossed anchor cable corresponding to the embossing process parameters.

[0061] In this embodiment, genetic algorithms, particle swarm optimization and other methods are used to find the optimal jacking distance so that the embossed anchor cable can achieve the optimal balance in various evaluation dimensions (meaning that the embossed anchor cable can maximize economic benefits and minimize environmental impact while meeting mechanical performance requirements).

[0062] Furthermore, in the preset numerical simulation analysis model, the multi-stage plastic deformation characteristics are used to analyze the shear stress changes of the embossed segment anchoring interface under different shear slip amounts, so as to set the multi-segment shear slip relationship of the embossed segment anchoring interface of the embossed structure, specifically including: The relationship between shear stress and shear slip is divided into four stages: In the initial stage, when the shear slip s is less than or equal to the first critical value s1, the shear stress remains at the maximum value τ1; When the shear slip s is greater than s1 but less than or equal to the first critical value s2, the shear stress decreases linearly from τ1 to the residual strength τ2; when the shear slip s is greater than s2 but less than or equal to the third critical value s3, the shear stress decreases from τ2 to a lower strength τ3; When the shear slip s is greater than s3, the shear stress stabilizes at the lowest value τ4.

[0063] Specifically, the four-stage formula of the anchoring interface shear stress τ is as follows: Where D b It is the maximum diameter of the embossing section.

[0064] In this embodiment, the bond-slip relationship of the anchoring interface of the non-embossed section is also set in the numerical simulation analysis model, specifically including: At the anchoring interface of the non-embossed section, the shear stress τ a The relationship with shear slip is divided into two stages: In the initial linear growth stage, when the shear slip s is less than or equal to the critical value s a When the shear stress τ a It decays exponentially from the peak Decline, the decay rate is controlled by the preset decay coefficient; When the shear slip s is greater than the critical value s a The shear stress drops rapidly to zero.

[0065] Specifically, the bond-slip relationship formula is as follows: Where, τ a is the shear stress of the anchoring interface of the non-embossed segment; is the peak shear strength of the anchoring interface of the non-embossed section; s a is the shear slip corresponding to the peak shear strength; n is the attenuation coefficient, which reflects the characteristics of the bond-slip relationship.

[0066] It should be understood that the serial numbers of the steps in the above embodiments do not imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0067] In one embodiment, a numerical simulation system for embossed anchor cables is provided. The numerical simulation system for embossed anchor cables corresponds to the numerical simulation method for embossed anchor cables in the above embodiment.

[0068] The numerical simulation system for embossed anchor cables includes a data acquisition module, a parameter table retrieval module, a threshold setting module, a numerical simulation analysis module, and a result evaluation output module. Detailed descriptions of each functional module are as follows: A data acquisition module is used to acquire and identify the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and the structural characteristics of the anchor cable; A parameter table retrieval module is used to obtain a preset mechanical property parameter table based on the embossing process parameters and the structural characteristics of the anchor cable; a threshold setting module is used to set the corresponding stress and strain threshold based on the mechanical property parameter table and the structural characteristics of the anchor cable; The numerical simulation analysis module is used to perform numerical simulation analysis in a preset numerical simulation analysis model. The content of the numerical simulation analysis includes the shear mechanical behavior of the embossed structure, anchoring agent, and anchoring interface in the embossed anchor cable. The simulation output results are obtained based on the design and manufacturing information and the mechanical property parameter table, and the simulation output results are compared with the stress and strain threshold to obtain the simulation test results. The result evaluation output module is used to determine the optimal jacking distance of the embossed anchor cable corresponding to the embossing process parameters based on the simulation test results.

[0069] For the specific limitations of the numerical simulation system for embossed anchor cables, please refer to the limitations of the numerical simulation method for embossed anchor cables in the above text, which will not be repeated here; the various modules in the above-mentioned numerical simulation system for embossed anchor cables can be implemented in whole or in part through software, hardware and their combination; the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0070] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: S1: Obtain and identify the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and anchor cable structural characteristics; S2: Obtaining a preset mechanical property parameter table based on the embossing process parameters and the anchor cable structural characteristics; S3: Based on the mechanical properties parameter table and the structural characteristics of the anchor cable, the corresponding stress and strain thresholds are set; S4: Perform numerical simulation analysis in a preset numerical simulation analysis model. The content of the numerical simulation analysis includes the shear mechanical behavior of the embossed structure, anchoring agent, and anchoring interface in the embossed anchor cable. The simulation output results are obtained based on the design and manufacturing information and the mechanical property parameter table. The simulation output results are compared with the stress and strain threshold to obtain the simulation test results. S5: Based on the simulation test results, determine the optimal jacking distance of the embossed anchor cable corresponding to the embossing process parameters.

[0071] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0072] In one embodiment, in particular, according to an embodiment of the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication module, and / or installed from a removable medium. When the computer program is executed by a central processing unit (CPU), the various functions defined in the present invention are performed.

[0073] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and 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.

[0074] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. The numerical simulation method for embossed anchor cables is characterized by: Applied to an embossed anchor cable provided with a measuring structure, the method comprises: Obtain and identify the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and anchor cable structural characteristics; Obtaining a preset mechanical performance parameter table according to the embossing process parameters and the anchor cable structural characteristics; Based on the mechanical performance parameter table and the structural characteristics of the anchor cable, a corresponding stress-strain threshold is set; Performing a numerical simulation analysis in a preset numerical simulation analysis model, wherein the content of the numerical simulation analysis includes the shear mechanical behavior of the embossed structure, the anchoring agent, and the anchoring interface in the embossed anchor cable; obtaining a simulation output result based on the design and manufacturing information and the mechanical property parameter table; and comparing the simulation output result with the stress-strain threshold to obtain a simulation test result; Based on the simulation test results, the optimal jacking distance of the embossing anchor cable corresponding to the embossing process parameters is determined.

2. The numerical simulation method for embossed anchor cables according to claim 1, characterized in that: The obtaining and identifying the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and the anchor cable structural characteristics specifically includes: Obtaining design drawing information, material property information, and embossing parameters during the manufacturing process of the embossed anchor cable, wherein the embossing parameters include the embossing length, embossing diameter, and embossing undulation angle of the embossed section of the embossed structure; Identifying the design information to determine embossing process parameters; The material property information and manufacturing process parameters are identified to determine the geometric shape, size, material properties and connection method of the embossed anchor cable, and obtain the structural characteristics of the anchor cable.

3. The numerical simulation method for embossed anchor cables according to claim 1, characterized in that: The method further includes: using multi-stage plastic deformation characteristics in the preset numerical simulation analysis model to analyze the shear stress changes of the embossed segment anchoring interface under different shear slip amounts to set the multi-segment shear slip relationship of the embossed segment anchoring interface of the embossed structure, specifically including: The relationship between shear stress and shear slip is divided into four stages: In the initial stage, when the shear slip s is less than or equal to the first critical value s1, the shear stress remains at the maximum value τ1; When the shear slip s is greater than s1 but less than or equal to the first critical value s2, the shear stress decreases linearly from τ1 to the residual strength τ2; when the shear slip s is greater than s2 but less than or equal to the third critical value s3, the shear stress decreases from τ2 to a lower strength τ3; When the shear slip s is greater than s3, the shear stress stabilizes at the lowest value τ4.

4. The numerical simulation method for embossed anchor cables according to claim 3, characterized in that: In the preset numerical simulation analysis model, the bond-slip relationship of the anchoring interface of the non-embossed section is also set, specifically including: At the anchoring interface of the non-embossed section, the shear stress τ a The relationship with shear slip is divided into two stages: In the initial linear growth stage, when the shear slip s is less than or equal to the critical value s a When the shear stress τ a It decays exponentially from the peak Decline, the decay rate is controlled by the preset decay coefficient; When the shear slip s is greater than the critical value s a The shear stress drops rapidly to zero.

5. The numerical simulation method for embossed anchor cables according to claim 4, characterized in that: Determining the optimal jacking distance of the embossing anchor cable corresponding to the embossing process parameters based on the simulation test results specifically includes: Based on the simulation test results, i.e., the multi-segment shear slip relationship, the embossing process parameters are optimized. The specific optimization steps include: Collect experimental test data under multiple different embossing process parameter combinations, including but not limited to performance indicators such as jacking distance and maximum load-bearing capacity; Compare and analyze the experimental test data with the corresponding numerical simulation output results to form a parameter matrix; The correlation coefficient of the parameter matrix is ​​calculated, and based on the correlation coefficient, the embossing length, embossing diameter and embossing undulation angle are adjusted to optimize the embossing structure design until the optimal embossing process parameter combination is found and the optimal jacking distance corresponding to different embossing process parameters is determined.

6. The numerical simulation method for embossed anchor cables according to claim 1, characterized in that: The setting of corresponding stress and strain thresholds based on the mechanical performance parameter table and the anchor cable structural characteristics specifically includes: Setting a first stress-strain threshold according to the structural characteristics of the anchor cable and preset mechanical property setting rules; According to the data in the mechanical property parameter table, the first stress-strain threshold is adjusted to determine the stress-strain threshold suitable for specific embossing process parameters.

7. The numerical simulation method for embossed anchor cables according to claim 6, characterized in that: The preset mechanical property setting rules are generated in the following manner: Obtain field test parameter values ​​under different geological conditions, as well as mechanical property test parameter values ​​of embossed anchor cables under corresponding laboratory conditions; Inputting the field test parameter values ​​and the corresponding laboratory test parameter values ​​into a preset machine learning model to obtain an environmental adaptability coefficient value; the preset machine learning model is used to predict the behavior of the embossed anchor cable under different environments and guide the formulation of mechanical property setting rules; According to the environmental adaptability coefficient value and in combination with specific engineering requirements, mechanical property setting rules applicable to specific geological conditions and embossing process parameters are generated.

8. The numerical simulation system for embossed anchor cables is characterized by: The numerical simulation method for the embossed anchor cable according to any one of claims 1 to 7 is applied, wherein the system comprises: A data acquisition module is used to acquire and identify the design and manufacturing information of the embossed anchor cable to obtain the embossing process parameters and the structural characteristics of the anchor cable; A parameter table retrieval module is used to obtain a preset mechanical performance parameter table based on the embossing process parameters and the anchor cable structural characteristics; A threshold setting module, configured to set corresponding stress and strain thresholds based on the mechanical performance parameter table and the structural characteristics of the anchor cable; A numerical simulation analysis module is used to perform numerical simulation analysis in a preset numerical simulation analysis model, wherein the content of the numerical simulation analysis includes the shear mechanical behavior of the embossed structure, anchoring agent, and anchoring interface in the embossed anchor cable; obtain simulation output results based on the design and manufacturing information and the mechanical property parameter table, and compare the simulation output results with the stress-strain threshold to obtain simulation test results; A result evaluation output module is used to determine the optimal jacking distance of the embossing anchor cable corresponding to the embossing process parameters based on the simulation test results.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the numerical simulation method for the embossed anchor cable according to any one of claims 1 to 7 are implemented.

10. A computer program product, characterized in that When the computer program product is run on a numerical simulation system, the numerical simulation system is enabled to execute the numerical simulation method for the embossed anchor cable according to any one of claims 1 to 7.

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