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Rigid-elastic vehicle rail coupling multi-software linkage simulation system and method

A track coupling, multi-software technology, applied in the field of rail transit, can solve the problems of low calculation accuracy of the control equation modeling method, uneven track parameters, and increase the difficulty of modeling, so as to achieve fast modification and reading of the status register, and solve the problem of using High difficulty, avoid the effect of solving difficulties

Pending Publication Date: 2021-12-10
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is suitable for the case of simple and regular track model; for the case of complex track form and additional components, the model is given by the control equation, and the model often needs to be simplified, and the dynamic characteristics of the simplified model and the actual model are quite different; Using the modal superposition method to solve the orbital response also has accuracy problems
Using this method, the vehicle-track model needs to be considered, especially the track model should be as periodic and continuous as possible, and uneven track parameters will greatly increase the difficulty of modeling
If it is necessary to add additional track auxiliary structures to the existing program, such as floating plates, lateral limit devices, etc., it is necessary to re-deduce the control equations, especially when the related auxiliary structures are unevenly arranged, modeling is difficult
In addition, even for track structures with regular and simple configurations, there are still deviations between the simplified beam and plate models and the real structural behavior when using the governing equation modeling method, which affects the calculation accuracy
[0006] At the same time, computer high-level language and finite element software usually cannot realize the synchronous alternate calculation of the two
For different software, you need to know whether there is a linkage interface, the functional limitations of the interface, how to use the interface, etc. The learning cost is large and the speed may be slow
[0007] Therefore, there is an urgent need for a method that can effectively deal with the low computational efficiency of the finite element modeling method and the low computational accuracy of the governing equation modeling method

Method used

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  • Rigid-elastic vehicle rail coupling multi-software linkage simulation system and method
  • Rigid-elastic vehicle rail coupling multi-software linkage simulation system and method
  • Rigid-elastic vehicle rail coupling multi-software linkage simulation system and method

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Experimental program
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Effect test

Embodiment 1

[0069] figure 1 It is a structural schematic diagram of the rigid-elastic vehicle track coupling multi-software linkage simulation system of this embodiment, referring to figure 1 , including: a computer high-level language program 100 , a finite element software program 300 and a status register 200 .

[0070] Among them, the computer high-level language program 100 is written and run by MatlabScript, and the finite element software program 300 is written and run by Ansys APDL.

[0071] The computer high-level language program 100 is used to adopt the computer high-level language to write the main program, establish the rigid body vehicle system, and calculate the wheel-rail force; the finite element software program 300 is used to adopt the finite element software to realize the modeling of the elastic track structure system; Register 200 is used for computer high-level language writing and finite element software program linkage control (alternate operation), to realize th...

Embodiment 2

[0089] This embodiment provides a rigid-elastic vehicle track coupling multi-software linkage simulation method, refer to figure 2 , including the following steps:

[0090] S1. Use high-level computer language to write the main program, establish the rigid body vehicle system and calculate the wheel-rail force.

[0091] S11. Writing the main program and reading and modifying the content of the status register by using a high-level computer language.

[0092] S12. Realize the establishment of the rigid body vehicle system by using high-level computer language.

[0093] S13. Using the inverse Fourier transform method to generate track irregularity samples; according to the conversion displacement from the rail unit node to the contact point, vehicle response and track irregularity, apply Hertz contact theory and Kalker linear creep force model, and implement using high-level computer language Calculation of the wheel-rail force for the wheel-rail force coupling between the ve...

Embodiment 3

[0105] This embodiment adopts the rigid-elastic vehicle track coupling multi-software linkage simulation system and method for specific application, considering that the B2 type subway train runs on the floating slab track structure. Table 1 and Table 2 give the main parameters of the track structure of the floating slab and the structure of the car body respectively; in the calculation, the train adopts 8 car marshalling, the speed is 80km / h, the floating slab adopts a single block, and only the track extends to the front and rear of the floating slab 50m. The track irregularity samples are generated according to the US level 5 track spectrum, and the wavelength is 1-30m.

[0106] Table 1 Material parameters of floating slab track

[0107]

[0108]

[0109] Table 2 Vehicle parameters

[0110]

[0111] Using the above model and this system for modeling and simulation, the displacement, velocity, and acceleration responses of the rails, floating plates, and car body ...

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Abstract

The invention provides a rigid-elastic vehicle rail coupling multi-software linkage simulation system and method. The rigid-elastic vehicle rail coupling multi-software linkage simulation system comprises a computer high-level language program, a finite element software program and a state register. The computer high-level language program is used for writing a main program, establishing a rigid body vehicle system and calculating wheel-rail force; the finite element software program is used for modeling the elastic track structure system; and the state register is used for controlling linkage of a computer high-level language and a finite element software program to achieve coupling dynamic calculation between the rigid body and the elastic body, the state register adopts a TXT format document, the computer high-level language program and the finite element software program are adopted to read and modify the content of the state register, and each linked software determines to run or wait to run by reading the content of the modified state register. According to the method, linkage real-time alternate operation of different software can be conveniently realized, and the state register can be quickly modified and read.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a multi-software linkage simulation method for a rigid-elastic vehicle rail coupling system. Background technique [0002] With the vigorous development of my country's urban construction, as of the end of 2019, 40 cities in my country have opened urban rail transit, with a total mileage of 6,730.27 kilometers. During the construction and operation of urban rail transit, it is necessary to solve various problems such as safety, comfort, and environmental impact. At this time, the traditional method of separately researching vehicles and rails is incompetent, and it is necessary to adopt the coupling analysis method of vehicle-rail-environment structure Conduct dynamic studies. Therefore, how to quickly and accurately calculate the dynamic response of the vehicle-track-environment structure coupling system has become a key issue. [0003] At present, there are two common ti...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/23G06F119/14
CPCG06F30/15G06F30/23G06F2119/14
Inventor 程志宝张群石志飞
Owner BEIJING JIAOTONG UNIV
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