Abstract
This paper describes testing of a wireless technique for measuring the actual sleeper vibrations and determination of their dynamic deflection based on the experimentally acquired acceleration data. Practical measurements of sleeper vibrations and calculation of displacements (deflections) along the track provide insight into the actual condition of layers below sleepers. The main goal was to develop the equipment for structural health monitoring as a basis for the track maintenance management.
Highlights
The track stiffness is a composite value that represents stiffnesses of different materials involved in layers below running rails which support the wheels of vehicles moving along the track
The paper presents a wireless system for measurements of actual sleeper vibrations and determination of their dynamic deflection and train speed
This paper presents the application of a wireless system for the railway infrastructure measurements
Summary
The track stiffness is a composite value that represents stiffnesses of different materials involved in layers below running rails which support the wheels of vehicles moving along the track It is defined by combination of stiffnesses of all layers and components of railway superstructure and substructure as follows: rails, resilient pads in the track structure, sleepers, ballast, subballast and subgrade. It represents the proportion between vertical load and elastic rail deflection (z) at a given moment. The paper presents a wireless system for measurements of actual sleeper vibrations and determination of their dynamic deflection and train speed. The goal was to develop the equipment for structural health monitoring as a basis for the track maintenance management
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