CN-115618640-B - SIMPACK-based wheel tread wear calculation optimization method and system

CN115618640BCN 115618640 BCN115618640 BCN 115618640BCN-115618640-B

Abstract

The invention belongs to the technical field of wheel tread wear simulation, and discloses a wheel tread wear calculation optimization method and system based on SIMPACK, which are applied to the process of dividing a set line into a plurality of sections of operation intervals for wheel tread wear simulation analysis, and the abrasion calculation optimization is carried out from a second section of operation interval on the basis of the steps of acquiring a wear profile and a model state file obtained by simulation of the previous section of operation interval; the method comprises the steps of obtaining a wheel tread abrasion value, carrying out wheel tread abrasion simulation analysis based on a set initial calculation time to obtain the wheel tread abrasion value abnormal value, carrying out the wheel tread abrasion simulation analysis on the running interval of the section based on the set simulation calculation time to obtain the wheel tread abrasion value simulation value of the running interval of the section, and carrying out difference between the wheel tread abrasion value simulation value and the abnormal value to obtain the wheel tread abrasion value correction value of the section. The invention solves the problem that the model state file is led into the SIMPACK to cause abnormal calculation result of the wheel tread wear, and improves the wear calculation precision.

Inventors

ZHANG JINYU
LI HAITAO
HUANG CHAO
LIN JUN
QU WENQIANG

Assignees

中车青岛四方机车车辆股份有限公司

Dates

Publication Date: 20260512
Application Date: 20221102

Claims (6)

1. The wheel tread wear calculation optimization method based on SIMPACK is characterized in that the method is applied to the process of dividing a set line into a plurality of sections of operation intervals for carrying out wheel tread wear simulation analysis, and the wear calculation optimization is carried out from a second section of operation interval on the basis of the following steps: Acquiring a wear profile and a model state file obtained by simulation of a previous section of operation interval; Based on the set initial calculation time, performing wheel tread wear simulation analysis to obtain an abnormal value of the wheel tread wear; Based on the set simulation calculation time, performing wheel tread abrasion simulation analysis on the running interval of the section to obtain a wheel tread abrasion simulation value of the running interval of the section; The wheel tread abrasion loss simulation value and the abnormal value are subjected to difference to obtain a wheel tread abrasion loss correction value of the section; The first segment of the running interval wear calculation includes: Based on the given initial tread profile, performing wheel tread abrasion simulation analysis on the first section of operation interval to obtain the wheel tread abrasion of the first section of operation interval; And accumulating the abrasion loss obtained in the first section of operation interval and the abrasion loss correction value of other sections of operation intervals to obtain the abrasion loss of the set circuit.
2. The optimization method for SIMPACK-based wheel tread wear calculation according to claim 1, wherein the initial calculation time t is set by a user, t is less than or equal to 1s.
3. The wheel tread abrasion calculation optimization system based on SIMPACK is characterized by comprising an abrasion simulation analysis module, wherein the abrasion simulation analysis module is used for dividing a set line into a plurality of sections of operation intervals to carry out wheel tread abrasion simulation analysis, the abrasion simulation analysis module comprises an N-th section of operation interval simulation sub-module, N is larger than 1, and the abrasion calculation optimization is carried out on the operation intervals from a second section, and comprises the following steps: the simulation starting point determining unit is used for obtaining the abrasion profile and the model state file obtained by simulation of the previous section of operation interval; The wear amount abnormal value calculating unit is used for carrying out wheel tread wear simulation analysis based on the set initial calculation time to obtain a wheel tread wear amount abnormal value; The abrasion loss simulation value calculation unit is used for carrying out wheel tread abrasion simulation analysis on the running interval of the section based on the set simulation calculation time to obtain the wheel tread abrasion loss simulation value of the running interval of the section; the abrasion loss correction unit is used for making a difference between the wheel tread abrasion loss simulation value and the abnormal value to obtain a wheel tread abrasion loss correction value of the section; The abrasion simulation analysis module further comprises a first section operation interval simulation sub-module which is used for carrying out wheel tread abrasion simulation analysis on the first section operation interval based on the given initial tread profile to obtain the wheel tread abrasion amount of the first section operation interval; the system also comprises a total abrasion loss calculation module, a total abrasion loss calculation module and a total abrasion loss calculation module, wherein the total abrasion loss calculation module is used for accumulating the abrasion loss obtained in the first section of operation interval and abrasion loss correction values of other sections of operation intervals to obtain the abrasion loss of the set circuit.
4. The SIMPACK-based wheel tread wear calculation optimization system according to claim 3, wherein said initial calculation time t is set by the user, t being equal to or less than 1s.
5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the SIMPACK-based wheel tread wear calculation optimization method of any one of claims 1-2 when the program is executed.
6. A computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the SIMPACK-based wheel tread wear calculation optimization method according to any one of claims 1-2.

Description

SIMPACK-based wheel tread wear calculation optimization method and system Technical Field The invention belongs to the technical field of wheel tread wear simulation, and particularly relates to a SIMPACK-based wheel tread wear calculation optimization method and system. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. SIMPACK is an expert electromechanical system kinematics/dynamics simulation analysis software, can describe and predict the kinematics and dynamics performance of a complex mechanical system, and is widely applied in the railway industry. It contains a plurality of specialty modules, wherein the railroad wear analysis module provides the function of calculating rail vehicle wheel tread wear. By utilizing the module, a user can rapidly analyze and evaluate the wheel tread abrasion of various railway vehicles under different operation conditions, so that theoretical basis is provided for the optimization design of vehicle parameters and the formulation of vehicle maintenance strategies. In the railway abrasion analysis module of SIMPACK, after a user establishes a vehicle-track model and sets calculation time, SIMPACK carries out abrasion calculation based on the original tread profile input by the user in the model before calculation, and an abrasion amount file and an abrasion profile file of the tread are generated in a result folder after calculation is completed. In the whole abrasion calculation process, the SIMPACK cannot automatically update the tread profile and calculate forward based on the new worn profile, and can only calculate with the original tread profile input by the user. In performing wheel tread wear calculations, in many cases it is necessary to divide a complete run of the vehicle on a long track into several runs on successive short tracks. Meanwhile, in order to ensure that "a plurality of running processes on a plurality of short tracks that are continuous in tandem" is equivalent to "one complete running process on a long track", it is necessary to ensure that the vehicle state is continuous at each division of the long track. These include 1) for long and large lines (e.g. the total mileage of Beijing opera-tion line exceeds 2200 km), relatively obvious wheel tread wear will occur once the vehicle runs on the whole line, in order to take account of the effect of the wear profile on the calculation result, the whole long and large line needs to be divided into several successively shorter lines for calculation in turn, while after the calculation of the last line is completed, the wear profile generated by SIMPACK needs to be used to replace the original profile in the model and to calculate the next line with this wear profile, 2) when the regular shaping of the wheel tread by the grinding mill during the running of the vehicle is considered, the track needs to be divided according to the period of action of the grinding mill, and the total wear profile of the wheel tread in each track (including the wear caused by the action of the wheel track and the wear caused by the action of the grinding mill) and the total wear profile then to be used for calculation of the next track instead of the original profile in the model, 3) when the total calculation time is long and the user can only be used to calculate the track for a part at present, the required time (the analysis of the current division time can be performed in a current calculation. When time allows, analysis is resumed for the remaining time. After each calculation, SIMPACK generates a model state file spckst in the result folder, which contains all the state parameters of the model at the moment of the calculation end, including displacement and speed information of each hinge in the model, the numerical value of each force element, the model time (i.e. the running time of the vehicle in the model, which corresponds to the position of the vehicle on the track), and the like, in addition to the abrasion amount file and the abrasion profile file of the tread of the wheel. Before the next calculation starts, the file is imported into the model, so that the model state at the moment of the next calculation start and the model state at the moment of the last calculation end are completely consistent, and the two previous and subsequent calculations can be connected in a seamless mode at the track dividing position. However, it was found by calculation that the introduction of the spckst document resulted in abnormal calculation of wheel tread wear. The following will take a simplified model as shown in fig. 1 as an example, in which the vehicle starts at point a and travels along a linear track at a constant speed of 200km/h for 200s to point C. The point B is a dividing point of the track AC, the line conditions of the AB section and the BC section are identical, the running speed of the vehicle on the