Visual high-speed train roadbed granule vibration-subsidence recapitulation model test system

Abstract

The invention relates to a visual high-speed train roadbed granule vibration-subsidence recapitulation model test system, which comprises a model test box, a distributive high-frequency loading device, a roadbed nonuniform deformation regulation device, a visual monitoring device and a work station, wherein the model test box is used for simulating a ballast track roadbed form and a ballastless track roadbed form; the distributive high-frequency loading device is used for simulating dynamic load generated in the advancing process of a high-speed train, and regulating the waveform, the amplitude value, the frequency and the phase difference of the dynamic load; the roadbed nonuniform deformation regulation device is used for quantificationally controlling and simulating the roadbed longitudinal nonuniform deformation; the visual monitoring device comprises a high-speed camera and a light source in opposite arrangement with the model test box, and is used for shooting a roadbed longitudinal cross section image in the model test box; the work station is connected with the distributive high-frequency loading device, the roadbed nonuniform deformation regulation device, the high-speed camera and the light source, and is used for realizing the experiment control and obtaining the roadbed longitudinal cross section image for analysis and processing. Compared with the prior art, the visual high-speed train roadbed granule vibration-subsidence recapitulation model test system has the advantages of precise simulation, intuition, accuracy and the like.

Description

technical field [0001] The invention relates to the field of roadbed dynamics, in particular to a visual high-speed railway foundation particle body vibration subsidence replay model test system. Background technique [0002] As a common form of track support structure, subgrade is widely used in the construction of high-speed railway lines in my country. With the continuous improvement of train speed and comfort requirements, the deformation of railway subgrade during operation has also attracted more and more attention. The study found that when the high-speed train is running in the speed range of 380km / h to 400km / h, the railway subgrade will appear in a quasi-resonant state, and the uneven deformation will increase significantly, seriously affecting the safety of train operation. Moreover, there are periodic intervals in roadbed maintenance, so that the deterioration in actual service cannot be detected in time. Therefore, it is very necessary to conduct in-depth resear...

AI Technical Summary

Problems solved by technology

The study found that when the high-speed train is running in the speed range of 380km / h to 400km / h, the railway subgrade will appear in a quasi-resonant state, and the uneven deformation will increase significantly, seriously affecting the safety of train operation

Moreover, there are periodic intervals in roadbed maintenance, which leads to the fact that the deterioration in actual service cannot be discovered in time. Therefore, it is very necessary to conduct in-depth research on the law of further development of existing deterioration of roadbeds under the action of high-frequency dynamic loads.

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