Considering wheel-rail rolling contact, the coupling modeling analysis method of high-speed railway subgrade

A high-speed railway and analysis method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of insufficient accuracy of dynamic response finite element analysis, and achieve a reasonable and comprehensive model setting, fine structure, and improved accuracy. Effect

Active Publication Date: 2019-02-22
CENT SOUTH UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a modeling method that is more in line with the actual mechanical characteristics of the wheel-rail relationship of high-speed railways, that is, a high-speed railway roa...

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  • Considering wheel-rail rolling contact, the coupling modeling analysis method of high-speed railway subgrade
  • Considering wheel-rail rolling contact, the coupling modeling analysis method of high-speed railway subgrade
  • Considering wheel-rail rolling contact, the coupling modeling analysis method of high-speed railway subgrade

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Embodiment Construction

[0041] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0042] A high-speed railway subgrade coupling modeling analysis method considering wheel-rail rolling contact, such as figure 1 The flow shown, the specific steps are as follows:

[0043] (1) Simplify the overall model structure into vehicle structure (including car body 1, bogie 2, wheel set 3), track structure (including rail 4, track plate 5) and subgrade structure (including base plate 6, surface layer of subgrade bed 7, the simplified structure of subgrade bed bottom layer 16, subgrade body 17 and foundation 8), as figure 2 as shown, figure 2 (a) is a cross-sectional view, figure 2 (b) is the longitudinal section view, figure 2 In (c) and figure 2 Middle (d) is an enlarged view of the detailed structure. Extract geometric parameters such as...

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Abstract

The invention provides a high-speed railway roadbed coupling modeling analysis method considering wheel/rail rolling contact, By building a vehicle model, Track model and roadbed structure model are used to simulate the secondary suspension system of the vehicle, spring damping element is used to simulate the force transfer fastener between rail and ballastless track slab, and kinematic coupling constraint combined with the predefined field of initial velocity is used to simulate the rolling contact mechanics behavior between wheel rim surface and rail surface. At the same time, the coupling effect of roadbed reflects the mechanical response of wheel/rail under the rolling contact between wheel set and rail surface. It is a 3D finite element modeling analysis method which is closer to thereal driving process of high-speed railway. The analysis model of the high-speed railway roadbed established by the invention can obtain the calculation results of each structure which are more in line with the actual mechanical characteristics, and can effectively guide the analysis and calculation of the dynamic response of the high-speed railway roadbed and the reasonable design of the roadbedstructure.

Description

technical field [0001] The invention relates to the technical field of computer-aided design of railway engineering, in particular to a high-speed railway embankment coupling modeling analysis method considering wheel-rail rolling contact. Background technique [0002] At present, my country is in a period of rapid development of high-speed railway construction, and new problems and challenges emerge as the times require. The increase in train speed and axle load will affect the vibration intensity of the train and the subgrade structure, and the coupling between the vehicle and the track and between the track and the subgrade will have a corresponding increase in the impact on the dynamic response of the subgrade. [0003] Many achievements have been made in theoretical research, experimental testing and numerical simulation on the dynamic response of vehicles, tracks and subgrade structures. A large number of studies have shown that it is feasible to use finite element so...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/15G06F30/13
Inventor 魏丽敏李双龙何群
Owner CENT SOUTH UNIV
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