CN-122021030-A - Method and system for evaluating dynamic performance of high-speed railway line scheme

CN122021030ACN 122021030 ACN122021030 ACN 122021030ACN-122021030-A

Abstract

The invention relates to the field of high-speed railway engineering, in particular to a method and a system for evaluating power performance of a scheme of a high-speed railway line. The method comprises the steps of calculating dynamic responses under different vehicle suspension parameters through a high-speed railway line joint simulation analysis model comprising a vehicle subsystem, a track subsystem and line plane longitudinal section parameters, establishing a vehicle dynamic proxy model, setting linear simulation working conditions of multiple speed grades, calculating the linear simulation working conditions based on the dynamic proxy model, outputting dynamic indexes and constructing a multi-dimensional evaluation result database, inputting a to-be-evaluated high-speed railway line plane longitudinal section design scheme, obtaining dynamic performance prediction data through the evaluation result database, and evaluating and optimizing line plane longitudinal section parameters. The method can greatly improve the calculation efficiency of the dynamic performance of the design scheme of the high-speed railway line, realize the rapid and fine evaluation of the long-line scheme and provide support for the iterative optimization of the line design.

Inventors

YU HAOWEI
LI TAO
YUAN HONGLIANG
KOU JUNYU
XIE YI
HUANG YANLEI
ZHUO JIANCHENG
Xu Chaoshuai
YANG YANG
LIU BIN
LUO YUAN

Assignees

中铁二院工程集团有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260202

Claims (10)

1. A method for evaluating dynamic performance of a high-speed railway line scheme, the method comprising the steps of: S1, calculating dynamic responses under different vehicle suspension parameters through a high-speed railway line joint simulation analysis model, and establishing a vehicle dynamic proxy model based on the dynamic responses; the high-speed railway line joint simulation analysis model comprises a vehicle subsystem, a track subsystem and line horizontal and vertical section parameters; S2, calculating the linear simulation working conditions based on the vehicle dynamics agent model, outputting dynamics indexes and establishing an evaluation result database; s3, inputting a design scheme of the horizontal and vertical sections of the high-speed railway line to be evaluated, and obtaining dynamic performance prediction data through the evaluation result database.
2. The method for evaluating the dynamic performance of the high-speed railway line scheme according to claim 1 is characterized in that in the step S1, the line plane longitudinal section parameters comprise at least one of plane curve radius, relaxation curve length, superelevation, clamp straight line and round curve length, gradient, vertical curve radius and clamp slope section length, the vehicle subsystem adopts a multi-particle system modeling method, vibration characteristics of at least one of a vehicle body, a bogie, a wheel pair and a suspension system are considered, the track subsystem is a rail-sleeper-ballast-roadbed four-layer elastic support model, track irregularity excitation is considered in the modeling process, and the vehicle subsystem and the track subsystem are related through a wheel-rail dynamic coupling relation.
3. The method for evaluating the dynamic performance of the scheme of the high-speed railway line according to claim 1, wherein the vehicle dynamics agent model in the S1 is established by taking the vehicle suspension parameter as a test basic parameter, the value range of the vehicle suspension parameter is 50-150% of the original design parameter of the vehicle, the dynamic response of a plurality of sample points in the value range is calculated through the high-speed railway line joint simulation analysis model, and the model with better screening precision is determined by combining evaluation indexes after the Kriging agent model or the radial basis neural network model is initially established.
4. The method for evaluating the dynamic performance of the high-speed railway line scheme according to claim 3, wherein the evaluation index comprises at least one of a reliability index, a standard root mean square error and a standard maximum absolute value error, and the accuracy is more optimal, namely the reliability index in an error analysis result is higher, and the standard root mean square error and the standard maximum absolute value error are smaller.
5. The method for evaluating the dynamic performance of a high-speed railway line scheme according to claim 1 is characterized in that in S1, a whole line is divided into at least one typical section of a straight line section, a single curve section, a single ramp section and a curve-ramp combined section based on line structure characteristics, different typical sections are correspondingly adapted to different types of linear simulation working conditions, namely, the straight line section is adapted to a flat linear simulation working condition, the single curve section is adapted to a flat curve linear simulation working condition, the single ramp section is adapted to a vertical section linear simulation working condition, the curve-ramp combined section is adapted to a flat vertical combined linear simulation working condition, the speed grade ranges from 200km/h to 400km/h, the line flat vertical section parameter value range is 50% to 150% of the design standard parameter requirement corresponding to the speed grade, the plane curve radius is not more than 14000m, the ramp gradient is not more than 40 per mill, and the vertical curve radius is not more than 30000m.
6. The method for evaluating the power performance of the high-speed railway line scheme according to claim 1, wherein the evaluation result database in the step S2 is a multidimensional database comprising different speed grades, different line horizontal and vertical section parameters and different power response indexes, adopts a three-level hierarchical storage architecture of a data storage layer, a data warehouse layer and a subject data layer, and optimizes the query efficiency by combining an index strategy.
7. The method for evaluating the dynamic performance of a high-speed railway line scheme according to claim 1, wherein the output dynamic indexes comprise at least one of wheel track acting force, vehicle body vibration acceleration, vehicle body component displacement, stability index, comfort index, derailment coefficient, wheel weight load shedding rate and wheel axle transverse force when the linear simulation working condition is calculated.
8. The method for evaluating dynamic performance of a high-speed railway line scheme according to claim 1, wherein the dynamic performance prediction data in S3 is obtained through a database quick matching or interpolation algorithm, and the interpolation algorithm comprises at least one of a bilinear interpolation algorithm and a linear interpolation algorithm.
9. The method for evaluating the dynamic performance of the high-speed railway line scheme according to claim 1, wherein the step S3 further comprises the steps of parameter optimization and report output, wherein the dynamic performance prediction data are compared with limit values specified by the dynamic performance evaluation standard of the rolling stock, if the prediction data do not meet the requirement of the limit values, a genetic algorithm or a particle swarm optimization method is adopted to adjust the line flat profile parameters until the dynamic performance index meets the requirement of the limit values, and meanwhile, a comprehensive evaluation report is output, and the report comprises a dynamic performance detection result, a qualification judgment statement and line flat profile parameter optimization suggestion.
10. A high-speed railway line scheme dynamic performance evaluation system, characterized in that the system is operated by using a high-speed railway line scheme dynamic performance evaluation method as claimed in any one of claims 1 to 9.

Description

Method and system for evaluating dynamic performance of high-speed railway line scheme Technical Field The invention relates to the field of high-speed railway engineering, in particular to a method and a system for evaluating power performance of a scheme of a high-speed railway line. Background The current high-speed railway line plane and longitudinal section parameter selection still mainly depends on the existing design specification and engineering experience judgment, and systematic dynamic performance evaluation and optimization are not developed on the actual line design scheme. Although some scholars adopt dynamics simulation software to perform simulation analysis, the simulation analysis is mostly limited to local sections of the line, and the requirement of full-line dynamic performance is difficult to cover. The prior invention patent CN104636561A discloses a high-speed railway line design method based on train line system dynamics. The method adopts a system power simulation means, introduces indexes such as motion sickness, comfort level of a moderation curve, instantaneous comfort level and the like in the standards such as ISO2631, EN12299 and the like, and combines acceleration frequency distribution and cumulative frequency distribution comprehensive analysis to evaluate the rationality of the linear parameters and the line scheme, thereby providing a basis for determining the linear parameters and optimizing the line scheme. The invention establishes the comfort evaluation index based on the dynamics of the vehicle-line system, but does not introduce a mathematical proxy model and a structured database, and still has the problems of low efficiency of traditional simulation calculation and incapability of realizing rapid evaluation of long lines. The prior invention patent CN118821435A discloses a design stage high-speed railway line comfort evaluation method. The method comprises the steps of obtaining original data of a train and line data of a route to be tested, wherein the original data comprise traction parameters and vibration basic parameters of the train, obtaining a traction simulation result of the train based on a traction algorithm according to the traction parameters and the line data, wherein the traction simulation result is used for describing the relation between the speed and displacement of the train, and based on the traction simulation result, the vibration basic parameters and the line data and the vehicleAnd carrying out comfort evaluation on the route to be tested according to the track acceleration data and a preset comfort rule to obtain a comfort evaluation result of the route to be tested. In the invention, although comfort evaluation in a focusing design stage is combined with traction simulation and vehicle-track coupling dynamics, only single dimension of comfort is emphasized, safety and track stability indexes are lacked, and a reusable database is not constructed so as to improve evaluation efficiency. To sum up, the prior art still has a significantly shorter plate: 1. the calculation efficiency is low, the existing vehicle line dynamics simulation needs to carry out full-flow calculation on each design scheme, and has the disadvantages of long time consumption, high resource consumption and incapability of meeting the requirement of rapid iteration in the design stage; 2. The structured database is missing, namely line parameter selection is dependent on experiences, a scientific decision system with big data support is absent, and a reusable structured knowledge base is not formed by historical simulation data; 3. The long line assessment is limited, and for long line sections, the rapid assessment and accurate optimization of the whole line dynamic performance are difficult to realize by the existing simulation method, so that the improvement of the line design quality is restricted. Disclosure of Invention The invention aims to solve the technical problems of low dynamic evaluation efficiency, incomplete evaluation indexes, difficult long-line evaluation and the like in the design stage of a high-speed railway line in the prior art, and provides a method and a system for evaluating the dynamic performance of the scheme of the high-speed railway line. In a first aspect, the present invention provides a method for evaluating dynamic performance of a high-speed railway line scheme, the method comprising: S1, calculating dynamic responses under different vehicle suspension parameters through a high-speed railway line joint simulation analysis model, and establishing a vehicle dynamic proxy model based on the dynamic responses; the high-speed railway line joint simulation analysis model comprises a vehicle subsystem, a track subsystem and line horizontal and vertical section parameters; s2, calculating the linear simulation working conditions based on the vehicle dynamics proxy model, outputting dynamics indexes and establishing an evaluation result dat