A three-dimensional verification method applied to the quality assessment of overhead contact line design

Abstract

This invention discloses a three-dimensional verification method for evaluating the design quality of overhead contact lines, belonging to the field of overhead contact line design evaluation technology. This invention constructs a three-dimensional basic model based on the baseline design parameters of the benchmark design drawings, combined with BIM parametric modeling technology. Then, based on the overhead contact line standard component library, it matches target components according to the overhead contact line design scheme and completes three-dimensional collaborative modeling of all overhead contact line components according to the layout parameters. Finally, it relies on the three-dimensional collaborative model and the verification standard database to conduct multi-dimensional automated verification. This invention fundamentally solves the problems of traditional two-dimensional drawing manual verification, such as the inability to intuitively present spatial relationships, the easy omission of spatial collisions, and insufficient clearance, etc. It replaces manual line-by-line checking with automated and standardized verification, completely eliminating the drawbacks of strong subjectivity and easy omissions and misjudgments in manual verification, achieving accurate positioning and comprehensive investigation of design defects, and significantly improving the reliability and accuracy of overhead contact line design quality verification.

Description

Technical Field

[0001] This invention belongs to the field of catenary design evaluation technology, specifically a three-dimensional verification method for evaluating the design quality of catenary. Background Technology

[0002] As a core component of the railway traction power supply system, the design quality of the overhead contact system directly determines the safety, stability, and economy of railway operation. Currently, the quality assessment of overhead contact system design largely relies on the traditional method of manual verification of two-dimensional drawings and clause-by-clause checking of specifications, which has many drawbacks: First, two-dimensional drawings cannot intuitively present the three-dimensional spatial relationship between the overhead contact system and surrounding structures such as bridges, tunnels, tracks, and communication signals, easily overlooking design defects such as spatial collisions and insufficient clearance; second, the multi-dimensional verification of geometric parameters, structural strength, and electrical performance is independent and lacks coordination, making it difficult to comprehensively assess the rationality of the design; third, manual verification is inefficient, highly subjective, and prone to omissions and misjudgments, failing to achieve precise control over design quality.

[0003] This invention provides a three-dimensional verification method for evaluating the design quality of overhead contact lines, in order to solve the above-mentioned technical problems. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a three-dimensional verification method for evaluating the design quality of overhead contact lines.

[0005] To achieve the above objectives, a first aspect of the present invention provides a three-dimensional verification method for evaluating the design quality of overhead contact lines, comprising: Construct a three-dimensional basic model of the railway line; the three-dimensional basic model is constructed based on the reference design parameters of the railway line, which are derived from the reference design drawings; Based on the standard component library and three-dimensional basic model of the overhead contact system, three-dimensional collaborative modeling of all components of the overhead contact system is carried out according to the design scheme of the overhead contact system to obtain the three-dimensional collaborative model of the overhead contact system. Multi-dimensional verification of the overhead contact line is achieved based on a verification standard database and a three-dimensional collaborative model; the verification standard database includes verification thresholds corresponding to several verification data.

[0006] In one possible implementation, a three-dimensional basic model of the railway line is constructed, including: The baseline design parameters of the railway line are extracted from the baseline design drawings; the baseline design drawings include the line design drawings, bridge and tunnel civil engineering design drawings, and track design drawings. By combining baseline design parameters with BIM parametric modeling technology, a three-dimensional basic model of the railway line is constructed.

[0007] In one possible implementation, three-dimensional collaborative modeling of all components of the overhead contact system is performed according to the overhead contact system design scheme, including: The target component is obtained by matching the standard component library of the overhead contact system according to the overhead contact system design scheme; The target components are arranged one by one into the three-dimensional basic model according to the layout parameters in the catenary design scheme to obtain the three-dimensional collaborative model.

[0008] In one possible implementation, multi-dimensional verification of the overhead contact line is achieved based on a verification standard database and a three-dimensional collaborative model, including: Verification data for verification items is obtained through a 3D collaborative model; among which, verification items include collision clearance verification, geometric parameter verification, structural strength verification, and dynamic adaptation verification. Verification is completed by comparing the verification data with the verification threshold; after all verification items have been verified, a catenary design quality assessment report is generated.

[0009] In one possible implementation, verification data for the verification project is obtained through a three-dimensional collaborative model, including: The distance parameters between the catenary components and the surrounding structures, as well as the geometric parameters of the catenary components, are extracted from the 3D collaborative model. The distance parameters are used for collision clearance verification, and the geometric parameters are used for geometric parameter verification. Based on the component attribute parameters of the catenary components in the three-dimensional collaborative model, the stress conditions of the components under different simulation conditions are simulated to obtain the structural strength parameters of the catenary components; among them, the structural strength parameters are used for structural strength verification. Dynamic adaptation simulation was performed based on a 3D collaborative model and a standard pantograph model to obtain dynamic adaptation parameters. These parameters are used for dynamic adaptation verification. The pantograph model is a digital 3D model constructed based on standard pantograph specifications.

[0010] In one possible implementation, the stress conditions of components under different simulation conditions are simulated, including: The component attribute parameters of the catenary components are extracted from the three-dimensional collaborative model and then input into the finite element analysis model; the component attribute parameters include geometric parameters and material properties. The stress conditions of the contact wire components are simulated in the finite element analysis model according to the preset simulation conditions, and the structural strength parameters are extracted from the simulation results. The structural strength parameters include the stress and deformation of the components.

[0011] In one possible implementation, dynamic adaptation simulation is performed based on a three-dimensional collaborative model and a standard pantograph model, including: Import the 3D collaborative model and the standard pantograph model into the pantograph-catenary coupling simulation model; In the pantograph-catenary coupling simulation model, the dynamic contact process of the pantograph and catenary is simulated according to the preset operating conditions to obtain dynamic adaptation parameters; among them, the operating conditions include the operating speed and the load type.

[0012] In one possible implementation, verification is performed by comparing verification data with a verification threshold, including: Extract the verification threshold corresponding to the verification data from the verification standard database; The verification items are judged to be qualified by comparing the verification data and the verification threshold. If they are qualified, the verification items are deemed qualified. If not, defect information is generated based on the comparison results, and the defect information and verification items are associated.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention constructs a three-dimensional basic model based on the baseline design parameters of the benchmark design drawings and BIM parametric modeling technology. Then, based on the standard component library of the overhead contact system, it matches target components according to the overhead contact system design scheme and completes three-dimensional collaborative modeling of all components of the overhead contact system according to the layout parameters. Finally, it conducts multi-dimensional automated verification based on the three-dimensional collaborative model and the verification standard database. This invention can completely restore the true three-dimensional spatial form and relative positional relationship of the overhead contact system with railway lines, bridges, tunnels, and tracks. It fundamentally solves the problems of traditional two-dimensional drawing manual verification, such as the inability to intuitively present spatial relationships, easy omission of spatial collisions, and insufficient clearance. At the same time, it accurately avoids design loopholes such as incorrect component selection and deviation of layout parameters. It replaces manual line-by-line checking with automated and standardized verification, completely eliminating the drawbacks of strong subjectivity and easy omission and misjudgment of manual verification. It realizes accurate positioning and comprehensive investigation of design defects, significantly improves the reliability and accuracy of overhead contact system design quality verification, and ensures the compliance and rationality of the overhead contact system design scheme from the source.

[0014] 2. In structural strength verification, this invention extracts component attribute parameters of the contact wire structure from a three-dimensional collaborative model and inputs them into a finite element analysis model to accurately obtain structural strength parameters by simulating various simulation conditions. In dynamic adaptation verification, the three-dimensional collaborative model and the standard pantograph model are imported into the pantograph-catenary coupling simulation model to simulate different train operation conditions and recreate the dynamic contact process of the pantograph-catenary system to extract dynamic adaptation parameters. This invention replaces traditional manual mechanical calculations and subjective dynamic verification with digital simulation, completely overcoming the technical limitations of low accuracy, poor efficiency, and inability to simulate complex working conditions and dynamic processes in manual verification. It effectively solves the industry pain points of difficulty in accurately assessing the stress safety of components and predicting the dynamic current collection stability of the pantograph-catenary system in manual verification. The entire process is free from subjective human intervention, avoiding omissions and misjudgments. High-strength and dynamic verification can be completed without on-site operation, significantly improving verification efficiency and accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0016] Figure 1 This is a schematic diagram of the method steps for the three-dimensional verification method for evaluating the design quality of overhead contact lines in an embodiment of the present invention; Figure 2 This is a schematic diagram of the modeling steps of the three-dimensional collaborative model in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the method steps for implementing multi-dimensional verification of overhead contact lines based on a verification standard database and a three-dimensional collaborative model in an embodiment of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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 are within the scope of protection of the present invention.

[0018] To address the shortcomings of existing contact network design quality assessment methods, which rely on manual verification of two-dimensional drawings to intuitively reflect three-dimensional spatial relationships, easily overlooking design defects such as spatial collisions and insufficient clearance, and to resolve issues such as low efficiency, strong subjectivity, and the tendency to omissions and misjudgments in manual verification, making it difficult to prevent contact network design quality defects from the source.

[0019] Please see Figure 1 The first aspect of this invention provides a three-dimensional verification method for evaluating the design quality of overhead contact lines, the implementation process of which is as follows: A01: Construct a three-dimensional basic model of the railway line; The three-dimensional basic model is constructed based on the basic design parameters of the railway line, encompassing the line's horizontal alignment, longitudinal elevation, bridge structure, track alignment, and rail surface elevation. This three-dimensional basic model forms the basis for the subsequent three-dimensional collaborative model of the overhead contact system, primarily serving to provide a spatial reference.

[0020] A02: Based on the standard component library and three-dimensional basic model of the overhead contact system, three-dimensional collaborative modeling of all components of the overhead contact system is carried out according to the design scheme of the overhead contact system to obtain the three-dimensional collaborative model of the overhead contact system; The overhead contact line standard component library is built according to the industry standards for overhead contact line design. It is used to select suitable overhead contact line components based on the overhead contact line design scheme. These components include the standard specifications, material properties, geometric parameters, mechanical strength, and electrical performance of each part of the overhead contact line.

[0021] The overhead contact line design scheme is the target to be evaluated in this invention. It includes the layout parameters of each overhead contact line component on the railway line. Based on the overhead contact line design scheme, the required components on the overhead contact line can be determined. The corresponding components are matched from the overhead contact line standard component library and integrated into the three-dimensional basic model according to the layout parameters to obtain a three-dimensional collaborative model.

[0022] The three-dimensional collaborative model can extract information such as support positions, cantilever installation angles, contact wire height, pull-out values, spans, and anchor joint spacing to realize the three-dimensional spatial association between the catenary and railway lines, bridges, tunnels, and tracks, so as to complete the multi-dimensional verification of the catenary design scheme.

[0023] A03: Multi-dimensional verification of the overhead contact line is achieved based on a verification standard database and a three-dimensional collaborative model; the verification standard database includes verification thresholds corresponding to several verification data.

[0024] The verification standard database includes several types of verification thresholds (consistent with the verification data) preset according to the catenary design specifications. Various verification items are performed based on the three-dimensional collaborative model, and the verification data corresponding to each item is compared with the verification thresholds to complete a multi-dimensional verification and evaluation of the catenary design quality.

[0025] This invention first constructs a three-dimensional basic model of the railway line, and then integrates it with a standard component library and design schemes of the overhead contact system to generate a three-dimensional collaborative model of the overhead contact system. Based on this collaborative model, various types of verification items are performed, thereby achieving a multi-dimensional evaluation of the overhead contact system design quality. This invention replaces manual verification with automated multi-dimensional verification, significantly improving verification efficiency and accuracy, and reducing omissions and misjudgments. Through virtual simulation of pantograph-catenary dynamic adaptability and finite element analysis of structural strength, the dynamic current collection stability and structural safety of the design scheme can be predicted in advance, significantly improving the quality of the overhead contact system design.

[0026] When manually verifying two-dimensional drawings to assess the design quality of the overhead contact system, the drawings cannot intuitively present the three-dimensional spatial relationship between the contact system and surrounding structures such as bridges, tunnels, tracks, and communication signals, easily overlooking design defects such as spatial collisions and insufficient clearance. This invention constructs a three-dimensional basic model using the benchmark design parameters of the railway line, ensuring the consistency between the three-dimensional basic model and the actual railway line. This provides a benchmark for verifying the design quality of the overhead contact system, thereby improving the reliability and comprehensiveness of the verification.

[0027] Please see Figure 2The implementation process for constructing the three-dimensional basic model of the railway line in this invention is as follows: B01: Extract the benchmark design parameters of the railway line from the benchmark design drawings; wherein, the benchmark design drawings include the line design drawings, bridge and tunnel civil engineering design drawings and track design drawings; The benchmark design drawings include route design drawings, bridge and tunnel civil engineering design drawings, and track design drawings. These benchmark design drawings record the benchmark design parameters of railway lines, bridges and tunnels, and railway tracks. These benchmark design parameters are the core basis for evaluating the quality of the catenary design.

[0028] After constructing a three-dimensional basic model based on the basic design parameters, the model can be used as a basis for verification. In some preferred embodiments, geographically measured data from the railway line can also be introduced to enrich the three-dimensional basic model. This geographically measured data is used to simulate the interference relationship between the contact wire and other objects besides the railway line, bridges, tunnels, and railway tracks. For example, vegetation point cloud data along the railway line can be collected, and the vegetation point cloud data can be used to present the three-dimensional outline of the vegetation in the three-dimensional basic model to identify whether the contact wire interferes with the vegetation.

[0029] B02: By combining benchmark design parameters and BIM parametric modeling technology, a three-dimensional basic model of the railway line is constructed.

[0030] BIM parametric modeling technology is a 3D digital modeling method driven by variable parameters. Its implementation process has been publicly disclosed in existing solutions and will not be elaborated upon here. The 3D basic model is the foundation for evaluating the design quality of the overhead contact system, encompassing core information such as the track alignment, longitudinal profile elevation, bridge structure, tunnel structure, track alignment, and rail surface elevation. For example, taking the quality verification of the catenary design of a high-speed railway section as an example, the benchmark design parameters such as the horizontal alignment, longitudinal elevation, bridge structural dimensions, tunnel outline, track alignment, and rail surface elevation of the section are first extracted. The benchmark design parameters are then combined with BIM parametric modeling technology to construct a three-dimensional basic model of the railway line that is consistent with the benchmark design drawings. This three-dimensional basic model fully contains the real spatial form of the straight sections, curved sections, bridge sections, and tunnel sections of the section, and can accurately reflect the relative positional relationship between the track, bridge, and tunnel.

[0031] This invention constructs a three-dimensional basic model based on railway line benchmark design parameters and BIM technology, which can accurately restore the real spatial form and positional relationship of the line, bridges, tunnels and tracks, providing a unified, stable and high-fidelity spatial benchmark carrier for catenary design verification, and significantly improving the reliability and comprehensiveness of the verification.

[0032] When verifying the quality of the overhead contact system design, existing methods struggle to effectively integrate the design with the three-dimensional environment of the railway line, bridges, tunnels, and tracks, failing to intuitively represent the true spatial relationship between the contact system components and surrounding structures. Furthermore, manual component selection and layout verification are prone to errors such as selection mistakes and parameter deviations, leading to design flaws going undetected. To accurately reconstruct the relative relationship between the contact system and the railway environment and achieve reliable verification, it is necessary to effectively integrate the contact system design with a three-dimensional foundation model, constructing a comprehensive three-dimensional collaborative model of the contact system.

[0033] In this invention, the corresponding target components are first matched from the standard component library of the overhead contact system according to the overhead contact system design scheme. The target components are then integrated into the three-dimensional basic model according to the arrangement parameters in the overhead contact system design scheme to obtain a three-dimensional collaborative model. This three-dimensional collaborative model can accurately express the relative relationship between the overhead contact system and the railway line.

[0034] Please see Figure 2 The implementation process of three-dimensional collaborative modeling of all components of the overhead contact system according to the overhead contact system design scheme in this invention is as follows: C01: The target component is obtained by matching it from the standard component library of the overhead contact system according to the overhead contact system design scheme; The specifications and models of all components are extracted from the overhead contact line design scheme. Based on these specifications and models, the corresponding target components are matched from the overhead contact line standard component library. Directly extracting the target components corresponding to the components from the overhead contact line standard component library can effectively verify errors in component selection during the overhead contact line design, while avoiding verification errors that may occur during manual verification.

[0035] C02: Arrange the target components one by one into the three-dimensional basic model according to the layout parameters in the catenary design scheme to obtain the three-dimensional collaborative model.

[0036] The layout parameters of the target components are extracted from the catenary design scheme, and the target components are arranged one by one into the three-dimensional basic model according to the layout parameters, so as to realize the integration of the catenary and the railway line, thereby providing a model basis for the subsequent catenary design quality verification.

[0037] The layout parameters include the layout angle, layout position, contact wire height, pull-out value, etc. Based on the layout parameters, the components in the contact network can be integrated into the three-dimensional basic model according to the design requirements, so as to avoid the omission of contact network design problems due to mismatch of layout parameters.

[0038] For example, taking the quality verification of the catenary design in a high-speed railway section as an example, the specifications of catenary components such as support model, cantilever arm specification, catenary model, and catenary cable model are first determined from the catenary design scheme. Target components are then matched from the standard catenary component library according to these specifications. Arrangement parameters of the catenary components are extracted from the catenary design scheme, such as support position, cantilever arm installation angle, contact wire height, pull-out value, and span. Based on these arrangement parameters, the target components are arranged one by one into the completed three-dimensional basic model of the railway line, ultimately forming a complete three-dimensional collaborative model of the catenary. This three-dimensional collaborative model can realistically reflect the relative spatial relationship between each component of the catenary and the bridge and track, providing an accurate model basis for subsequent three-dimensional verification of spatial collision, clearance, and geometric parameters.

[0039] This invention matches target components from a standard overhead contact line component library using an overhead contact line design scheme, and precisely arranges them into a three-dimensional basic model according to the layout parameters to form a three-dimensional collaborative model. This model can realistically and accurately express the relative spatial relationship between the overhead contact line and railway lines, bridges, and tracks, effectively avoiding problems such as incorrect component selection and mismatched layout parameters. At the same time, it provides an intuitive and reliable model foundation for subsequent verification of spatial collisions, clearances, and geometric parameters, improving the comprehensiveness and accuracy of verification and reducing the risk of design defects being overlooked.

[0040] Relying solely on a three-dimensional collaborative model is insufficient for a direct quantitative assessment of the overhead contact line design quality. Existing verification methods lack unified verification standards and a systematic verification process, making it difficult to comprehensively verify multiple aspects such as spatial collision, geometric parameters, structural strength, and dynamic current collection stability simultaneously. Furthermore, they cannot determine the design's suitability based on objective data. This invention extracts verification data for preset verification items based on a three-dimensional collaborative model. By comparing the verification data with verification thresholds, it can determine whether the verification data meets quality requirements, thereby enabling the assessment of the overhead contact line design quality.

[0041] Please see Figure 3 The implementation process of multi-dimensional inspection of the overhead contact line based on the verification standard database and the three-dimensional collaborative model in this invention is as follows: D01: Obtain verification data for verification items through a 3D collaborative model; among which, verification items include collision clearance verification, geometric parameter verification, structural strength verification, and dynamic adaptation verification; Collision limit check is used to check whether there are potential spatial collision hazards between components in the catenary and their surrounding structures, and it performs the check by identifying the distance parameters between the components and the surrounding structures. Geometric parameter check is used to check whether the corresponding geometric parameters of the catenary components meet the requirements, and it performs the check by comparing the geometric parameters with parameter thresholds. Structural strength check is used to evaluate whether the structural strength of components in the catenary under different loads meets the design requirements, and it performs the check by simulating different load conditions. Dynamic adaptation check is used to evaluate the dynamic current collection stability of the catenary, and it performs the check by simulating the dynamic contact process between the pantograph and the catenary.

[0042] It should be noted that the verification data is obtained based on the three-dimensional collaborative model, but not all verification data is directly extracted from the three-dimensional collaborative model. Some verification data can be directly extracted from the three-dimensional collaborative model, such as distance parameters and geometric parameters; some verification data needs to be obtained collaboratively with the three-dimensional collaborative model, such as structural strength parameters and dynamic adaptation parameters.

[0043] D02: Complete the check by comparing the verification data with the verification threshold; generate a catenary design quality assessment report after all verification items are completed.

[0044] Obtain the verification data of the preset verification items based on the three-dimensional collaborative model, and at the same time extract the verification thresholds corresponding to the verification data from the verification standard database. Complete the check by comparing the verification data with the verification threshold. After all verification items are completed, the catenary design quality assessment is completed.

[0045] Generate the verification results of the verification items according to the verification results of each verification data, and generate a catenary design quality assessment report according to the verification results of each verification item. This catenary design quality assessment report includes verification items, verification data, and whether the verification data is qualified, and can be used to optimize the catenary design scheme specifically. The present invention can achieve fully automatic and objective verification of collision limit, geometric parameters, structural strength, and dynamic adaptability by extracting multi-dimensional verification data from the three-dimensional collaborative model and comparing it with the verification thresholds in the verification standard database. Finally, an assessment report containing detailed verification items, verification data, and qualified conclusions is generated, which can intuitively locate design problems and support scheme optimization, greatly improving the comprehensiveness, accuracy, and standardization of catenary design quality assessment.

[0046] In order to achieve a comprehensive assessment of the catenary design quality, when the present invention conducts the catenary design quality assessment, it first designs verification items from the perspective of comprehensive assessment, obtains the verification data of each verification item based on the three-dimensional collaborative model, and then completes the assessment by comparing the verification data with the corresponding verification thresholds.

[0047] The implementation process of obtaining the verification data of the verification items through the three-dimensional collaborative model in the present invention is as follows: E01: Extract the distance parameters between the contact wire components and the surrounding structures, as well as the geometric parameters of the contact wire components, from the 3D collaborative model; among them, the distance parameters are used for collision clearance verification, and the geometric parameters are used for geometric parameter verification. The relative positional relationships between the catenary components and the surrounding structures of the railway line, bridges, tunnels, and tracks are already mapped in the 3D collaborative model. Distance parameters between the catenary components and the surrounding structures can be directly extracted from the 3D collaborative model; these distance parameters are used for collision clearance verification. It should be noted that the distance parameters are generally the minimum distances between the catenary components and the surrounding structures.

[0048] The three-dimensional collaborative model is mapped proportionally according to the catenary design scheme. Geometric parameters of the catenary components can be extracted from the three-dimensional collaborative model. These geometric parameters can be used to verify whether there are any problems with the catenary design scheme, that is, to perform geometric parameter verification.

[0049] E02: Based on the component attribute parameters of the catenary components in the three-dimensional collaborative model, the stress conditions of the components under different simulation conditions are simulated to obtain the structural strength parameters of the catenary components; among them, the structural strength parameters are used for structural strength verification. Component properties include geometric parameters and material properties, and simulation conditions include one or more loads such as wind load, ice load, and seismic load. Simulation conditions are used to simulate the stress conditions of the overhead contact line under different loads.

[0050] E03: Dynamic adaptation simulation is performed based on the three-dimensional collaborative model and the standard pantograph model to obtain dynamic adaptation parameters; among them, the dynamic adaptation parameters are used for dynamic adaptation verification.

[0051] The standard pantograph model is a digital three-dimensional model built based on industry standards and mainstream pantograph specifications. Its purpose is to be used for dynamic adaptation verification of pantograph and catenary.

[0052] For example, taking the quality verification of the catenary design in a high-speed railway tunnel section as an example, the verification data of each verification item is obtained based on the constructed three-dimensional collaborative model of the catenary: First, the distance parameters between the support columns, cantilever arms, and other components and the tunnel wall and track structure are extracted from the three-dimensional collaborative model. At the same time, geometric parameters such as contact wire height, pull-out value, span, and dropper length are extracted and used for collision clearance verification and geometric parameter verification, respectively. Second, the geometric dimensions and material strength of the support columns and cantilever arms are extracted from the three-dimensional collaborative model. The stress state of the components under two typical working conditions, wind load and ice load, is simulated. The structural strength parameters such as component stress and deformation are obtained through simulation calculation and used for structural strength verification. Finally, the three-dimensional collaborative model is coupled with a standard pantograph model that conforms to industry standards to carry out pantograph-catenary dynamic adaptation simulation and obtain dynamic adaptation parameters such as contact pressure, offline rate, and hard point distribution for dynamic adaptation verification. Through the above steps, all the data required for the verification items are obtained completely.

[0053] This invention accurately and systematically extracts core data for four types of verification items—collision clearance, geometric parameters, structural strength, and dynamic adaptation—based on a three-dimensional collaborative model. The data extraction is comprehensive and closely matches the verification requirements, providing complete and reliable data support for the subsequent multi-dimensional quantitative verification of the catenary design quality.

[0054] In the process of verifying the structural strength of the overhead contact system, traditional manual mechanical calculation methods are inaccurate and inefficient, and cannot accurately extract the structural strength parameters of the overhead contact system components under complex working conditions such as wind load and ice load, making it difficult to reliably verify the working reliability of the components under complex working conditions.

[0055] The implementation process for simulating the stress conditions of components under different simulation conditions in this invention is as follows: F01: Extract the component attribute parameters of the catenary components from the three-dimensional collaborative model and input the component attribute parameters into the finite element analysis model; Finite element analysis (FEM) models are tools used to verify the strength and stability of overhead contact system structures. They can replace traditional manual mechanical calculations, improving verification accuracy and efficiency. FEM models establish component models based on the component property parameters of the overhead contact system members to verify their structural strength.

[0056] F02: Simulate the stress condition of the contact wire components in the finite element analysis model according to the preset simulation conditions, and extract the structural strength parameters from the simulation results; among them, the structural strength parameters include the component stress and deformation.

[0057] In the finite element analysis model, preset simulation conditions such as wind load, ice load, and seismic load are simulated to calculate the structural strength parameters of the contact wire components. By analyzing the structural strength parameters, the structural strength of the contact wire components can be verified.

[0058] For example, taking the structural strength verification of the catenary support and cantilever arm in a section of a high-speed railway bridge as an example, firstly, the geometric dimensions, material strength, elastic modulus, and other component attribute parameters of the support and cantilever arm are extracted from the three-dimensional collaborative model of the catenary. These parameters are then input into the finite element analysis model, which constructs a simulation model consistent with the actual components based on the component attribute parameters. Subsequently, two preset simulation conditions, wind load and ice load, are applied to the finite element analysis model to simulate the stress state of the components under harsh environments. Through simulation calculations, structural strength parameters such as the stress and deformation of the support and cantilever arm are directly extracted, providing accurate data for subsequent determination of whether the structural strength is qualified.

[0059] This invention extracts component attribute parameters from a three-dimensional collaborative model and inputs them into a finite element analysis model. Then, it simulates the stress conditions of the components under preset simulation conditions. This allows for the accurate extraction of structural strength parameters such as component stress and deformation, effectively replacing traditional manual mechanical calculations. This significantly improves the accuracy and efficiency of structural strength verification and provides accurate and reliable data support for verifying the working reliability of contact network components under complex conditions.

[0060] In the quality verification of catenary design, traditional dynamic adaptation verification lacks a standardized simulation process, cannot accurately simulate the dynamic contact process of pantograph and catenary, makes it difficult to predict pantograph-catenary adaptation and dynamic current collection stability in advance, and cannot efficiently obtain dynamic adaptation parameters. This may lead to potential problems with pantograph-catenary adaptation in the catenary design scheme, and fails to meet the requirements for comprehensive and accurate dynamic verification.

[0061] The implementation process of dynamic adaptation simulation based on a three-dimensional collaborative model and a standard pantograph model in this invention is as follows: G01: Import the 3D collaborative model and the standard pantograph model into the pantograph-catenary coupling simulation model; The pantograph-catenary coupling simulation model is used to simulate the dynamic contact process between the overhead contact line and the pantograph. Based on the pantograph-catenary coupling dynamics principle, it combines the model parameters of the three-dimensional collaborative model and the standard pantograph model to simulate the dynamic interaction between the pantograph and the catenary under different operating conditions and accurately output dynamic adaptation parameters.

[0062] G02: Simulate the dynamic contact process of the pantograph and catenary in the pantograph-catenary coupling simulation model according to the preset driving conditions to obtain dynamic adaptation parameters.

[0063] The operating conditions include operating speed and load type. The pantograph-catenary coupling simulation model simulates the dynamic contact process of the pantograph under preset operating conditions, thereby obtaining the dynamic adaptation parameters for the corresponding operating conditions. These dynamic adaptation parameters include contact pressure, derailment rate, arcing rate, and hard spot distribution parameters.

[0064] Simulation of the dynamic contact process between the pantograph and the catenary can be achieved using existing simulation software, such as Simpack; the specific simulation process will not be detailed here. Alternatively, standard pantograph models and pantograph-catenary coupling simulation models can be called from existing solutions, as these models are built into the Simpack software.

[0065] For example, taking the dynamic adaptation verification of the overhead contact system in a high-speed railway section as an example, the constructed three-dimensional collaborative model of the overhead contact system and the standard pantograph model conforming to industry standards are first imported into the pantograph-catenary coupling simulation model to ensure that the position and direction of the contact wire in the three-dimensional collaborative model are accurately matched with the contact trajectory of the standard pantograph model, laying the foundation for dynamic simulation. Then, in combination with the actual operation needs of the section, two typical train operation conditions are set up for simulation: one is the normal train operation condition (train speed 250km / h, no additional wind load), and the other is the extreme train operation condition (train speed 350km / h, accompanied by level 5 crosswind load). In the pantograph-catenary coupling simulation model, the dynamic contact process between the pantograph and the contact wire during train operation is simulated, the changes in the contact state of the two are captured in real time, and data such as contact pressure, contact frequency, and offline time are automatically recorded. Finally, the dynamic adaptation parameters are extracted. The dynamic adaptation parameters are as follows: under normal working conditions, the contact pressure is stable at 12-15N, the offline rate is 0.3%, and there is no arcing phenomenon; under extreme working conditions, the contact pressure fluctuates at 10-18N, the offline rate is 1.2%, and there is no obvious arcing or hard point impact.

[0066] This invention, through a standardized dynamic adaptation simulation process, can import a three-dimensional collaborative model and a standard pantograph model into a pantograph-catenary coupling simulation model. This accurately simulates the dynamic contact process of the pantograph and catenary under different operating conditions, and can efficiently obtain core adaptation parameters such as contact pressure, offline rate, and arcing rate. Dynamic adaptation verification can be completed without on-site operation, effectively solving the problems of inaccurate simulation and difficulty in parameter acquisition in traditional dynamic verification. This ensures the accuracy and comprehensiveness of dynamic adaptation verification, provides reliable data support for judging the dynamic adaptability of catenary design schemes, and guarantees the standardization and accuracy of dynamic verification.

[0067] In the process of verifying the design quality of the overhead contact system, traditional verification methods lack unified verification standards and standardized procedures. They rely solely on manual comparison to determine whether the verification data is qualified, without clear verification thresholds as a basis for judgment. Furthermore, they cannot systematically link verification data with qualification standards, which easily leads to problems such as incomplete verification, judgment bias, and omission of defects. At the same time, it is difficult to accurately locate and target non-conforming items, thus failing to meet the needs of quality control in the design of the overhead contact system.

[0068] The verification process in this invention, which involves comparing verification data with a verification threshold, is as follows: H01: Extract the verification threshold corresponding to the verification data from the verification standard database; The verification items include various verification data, and each verification data can obtain a verification threshold by matching from the verification standard database. This verification threshold is used to evaluate whether the verification data is qualified.

[0069] H02: Determine whether the verification item is qualified by comparing the verification data with the verification threshold; if so, determine that the verification item is qualified; if not, generate defect information according to the comparison result, and associate the defect information and the verification item.

[0070] When all the verification data in the verification item are qualified, it is determined that the verification item is qualified. If any verification data in the verification item is unqualified, defect information is generated for the unqualified verification data, and the defect information, the verification data, and the verification item are associated for targeted optimization. The defect information includes the defect location, defect type, data deviation, etc.

[0071] Through the clear and complete process of verification threshold extraction, data comparison with the threshold, and defect association, the present invention can standardize the determination of the qualification of each verification item, accurately identify the deviation between the verification data and the threshold, timely generate defect information and associate it with the corresponding verification item, clearly locate the design problem, provide a clear basis for the optimization of the catenary design, effectively ensure the standardization and accuracy of the verification work, ensure the traceability and implementability of the verification results, and help achieve the precise control of the catenary design quality.

[0072] It should be understood that the description of technical features, technical solutions, beneficial effects or similar languages in this application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that at least one embodiment includes specific technical features, technical solutions or beneficial effects. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. <{0000197}><000019{8}>In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any other combination thereof. When implemented using a software program, it can be implemented entirely or partially in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0074] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A three-dimensional verification method for evaluating the design quality of overhead contact lines, characterized in that, include: Construct a three-dimensional basic model of the railway line; the three-dimensional basic model is constructed based on the reference design parameters of the railway line, which are derived from the reference design drawings; Based on the standard component library and three-dimensional basic model of the overhead contact system, three-dimensional collaborative modeling of all components of the overhead contact system is carried out according to the design scheme of the overhead contact system to obtain the three-dimensional collaborative model of the overhead contact system. Multi-dimensional verification of the overhead contact line is achieved based on a verification standard database and a three-dimensional collaborative model; the verification standard database includes verification thresholds corresponding to several verification data.

2. The three-dimensional verification method for evaluating the design quality of overhead contact lines according to claim 1, characterized in that, Constructing a three-dimensional basic model of the railway line includes: The baseline design parameters of the railway line are extracted from the baseline design drawings; the baseline design drawings include the line design drawings, bridge and tunnel civil engineering design drawings, and track design drawings. By combining baseline design parameters with BIM parametric modeling technology, a three-dimensional basic model of the railway line is constructed.

3. The three-dimensional verification method for evaluating the design quality of overhead contact lines according to claim 1, characterized in that, Based on the overhead contact line design scheme, perform 3D collaborative modeling of all components of the overhead contact line, including: The target component is obtained by matching the standard component library of the overhead contact system according to the overhead contact system design scheme; The target components are arranged one by one into the three-dimensional basic model according to the layout parameters in the catenary design scheme to obtain the three-dimensional collaborative model.

4. The three-dimensional verification method for evaluating the design quality of overhead contact lines according to claim 1, characterized in that, Multi-dimensional verification of the overhead contact system is achieved based on a verification standard database and a three-dimensional collaborative model, including: Verification data for verification items is obtained through a 3D collaborative model; among which, verification items include collision clearance verification, geometric parameter verification, structural strength verification, and dynamic adaptation verification. Verification is completed by comparing the verification data with the verification threshold; after all verification items have been verified, a catenary design quality assessment report is generated.

5. The three-dimensional verification method for evaluating the design quality of overhead contact lines according to claim 4, characterized in that, The verification data for the verification project is obtained through a 3D collaborative model, including: The distance parameters between the catenary components and the surrounding structures, as well as the geometric parameters of the catenary components, are extracted from the 3D collaborative model. The distance parameters are used for collision clearance verification, and the geometric parameters are used for geometric parameter verification. Based on the component attribute parameters of the catenary components in the three-dimensional collaborative model, the stress conditions of the components under different simulation conditions are simulated to obtain the structural strength parameters of the catenary components; among them, the structural strength parameters are used for structural strength verification. Dynamic adaptation simulation was performed based on a 3D collaborative model and a standard pantograph model to obtain dynamic adaptation parameters. These parameters are used for dynamic adaptation verification. The pantograph model is a digital 3D model constructed based on standard pantograph specifications.

6. The three-dimensional verification method for evaluating the design quality of overhead contact lines according to claim 5, characterized in that, Simulate the stress conditions of components under different simulation conditions, including: The component attribute parameters of the catenary components are extracted from the three-dimensional collaborative model and then input into the finite element analysis model; the component attribute parameters include geometric parameters and material properties. The stress conditions of the contact wire components are simulated in the finite element analysis model according to the preset simulation conditions, and the structural strength parameters are extracted from the simulation results. The structural strength parameters include the stress and deformation of the components.

7. The three-dimensional verification method for evaluating the design quality of overhead contact lines according to claim 5, characterized in that, Dynamic adaptation simulation based on a 3D collaborative model and a standard pantograph model is performed, including: Import the 3D collaborative model and the standard pantograph model into the pantograph-catenary coupling simulation model; In the pantograph-catenary coupling simulation model, the dynamic contact process of the pantograph and catenary is simulated according to the preset operating conditions to obtain dynamic adaptation parameters; among them, the operating conditions include the operating speed and the load type.

8. The three-dimensional verification method for evaluating the design quality of overhead contact lines according to claim 4, characterized in that, Verification is performed by comparing the verification data with the verification threshold, including: Extract the verification threshold corresponding to the verification data from the verification standard database; The verification items are judged to be qualified by comparing the verification data and the verification threshold. If they are qualified, the verification items are deemed qualified. If not, defect information is generated based on the comparison results, and the defect information and verification items are associated.

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