Geometric unevenness dynamic characteristic testing table of railway track

Abstract

The invention discloses a geometric unevenness dynamic characteristic testing table of a railway track. The geometric unevenness dynamic characteristic testing table of the railway track comprises steel tracks, adjusting tables, hydraulic systems, guide track racks and a bogie, wherein the adjusting tables are paved on a foundation and positioned below the steel tracks, and adjust the heights of the steel tracks; the hydraulic systems are distributed on two sides of the steel tracks and adjust the distance between the tracks; the guide track racks are placed at two ends of the steel tracks and support guide tracks; and the bogie is slidably arranged above the steel tracks. Adjusting screw rods and hydraulic oil cylinders of the adjusting tables at various bases are adjusted independently, arrangement of specific-type geometric unevenness or different-type combined unevenness such as track height unevenness, level unevenness, track distance unevenness and direction unevenness of the tracks can be realized, unevenness wave depths and wave lengths are controlled by adjusting vertical and transverse parameters, and a testing platform is provided for accurate research of track geometric unevenness 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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