A test bed for dynamic characteristics of geometric irregularities of railway tracks

Abstract

The invention discloses a dynamic characteristic test bed for geometric irregularities of railway tracks. The invention comprises steel rails, an adjustment platform laid on the foundation and located below the steel rails to adjust the height of the steel rails, a hydraulic system distributed on both sides of the steel rails and adjusting the gauge, a guide rail bracket placed at both ends of the steel rails to support the guide rails, and slidingly arranged on the steel rails Bogie above. The present invention independently adjusts the adjusting screw rod and the hydraulic oil cylinder of the adjusting table at each base, and can realize certain types of geometric irregularities such as track height irregularity, horizontal irregularity, gauge irregularity, and direction irregularity, or different types of combination irregularities. setting, and through the adjustment of vertical and lateral parameters, the control of irregularity wave depth and wavelength can be realized, providing a test platform for more accurate research on orbital geometric irregularity parameters.

Description

technical field [0001] The invention relates to a test bed for dynamic characteristics of geometric irregularities of railway tracks. Background technique [0002] In railway engineering, track geometric irregularities caused by line construction, rail laying and train dynamic load are inevitable in the process of railway construction and operation. With the continuous increase of the running speed of high-speed trains and the continuous increase of the axle load of heavy-duty trains, the irregularity of the track geometry seriously deteriorates the running environment of the train, causing greater wheel-rail vibration, and affecting the ride comfort and operation of the train. Safety and even service performance of track structures. As the running device of the train, the bogie's dynamic performance will be most directly affected by the geometric irregularities of the track. Therefore, strengthening the dynamic characteristic test of track geometric irregularity plays an ...

AI Technical Summary

Problems solved by technology

However, in the rolling vibration test bench of rolling stock, the rails are replaced by rollers. The structure of the rollers is very different from the real structure of the slender rails with twisted shapes. In particular, the former cannot truly reflect the nonlinear wheel-rail contact geometry and wheel orbital force

Moreover, the rollers are often in a vibrating state during the test, and the existence of their dynamic displacement further increases the inaccuracy of the simulation of track geometric irregularities.

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