Apparatus, method and system for establishing test model of longitudinal resistance hysteresis performance of ballast bed

Abstract

The invention provides a device, method and system for building a ballast bed longitudinal resistance hysteretic behavior testing model. The device, method and system has the advantages that the ballast bed longitudinal resistance hysteretic behavior testing model is built according to a first resistance parameter and a first displacement parameter at the peak point of a loading curve, a second resistance parameter and a second displacement parameter at the end point of an unloading curve, initial elastic rigidity and a preset initial proportion coefficient constant, a user can acquire the stress state of a ballast bed under simulated circulating longitudinal load and the elastic-plastic deformation law of the ballast bed under periodic load through analysis according to the first resistance parameter, the first displacement parameter, the second resistance parameter, the second displacement parameter and the initial elastic rigidity and by the aid of the built ballast bed longitudinal resistance hysteretic behavior testing model, and reference can be provided for technicians in actual ballast bed longitudinal resistance hysteretic behavior testing and the mastering of longitudinal resistance performance evolution of the long-term-service ballast bed.

Description

technical field [0001] The invention relates to the field of rail transit, in particular to a device, method and system for establishing a test model of the longitudinal resistance hysteresis performance of a ballast bed. Background technique [0002] The track bed is an important part of the track and the foundation of the track frame. The ballast bed usually refers to the stone ballast (ballast) cushion layer laid on the roadbed surface under the railway sleeper. The main function is to support the sleeper, transmit the huge pressure on the upper part of the sleeper to the roadbed surface evenly, and fix the position of the sleeper, prevent the sleeper from moving longitudinally or laterally, greatly reduce the deformation of the roadbed, and at the same time ease the impact of the rolling stock wheel on the rail, which is convenient drain. Ballast resistance is the force provided by the gravel ballast bed to prevent the longitudinal and lateral movement of the sleeper. ...

AI Technical Summary

Problems solved by technology

[0003] Combined with the field practice, for the seamless track structure, the rail row and the ballast bed often interact. In the existing technology, the longitudinal resistance of the ballast bed is used as the design parameter of the track structure of the seamless track, and the test method of unidirectional loading is adopted When testing the longitudinal resistance-displacement curve of the ballast bed, since it is only a test of the resistance performance of the ballast bed under the action of one-way monotonic load, it is impossible to simulate the stress state of the ballast bed under the cyclical longitudinal load; The elastic-plastic deformation law of the ballasted ballast bed provides reference for the hysteretic performance test of the longitudinal resistance of the actual ballast bed and the evolution of the longitudinal resistance performance of the ballast bed under long-term service

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