Particle image velocimetry for strain measurement on a railway line
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Date
Authors
Oosthuizen, Eleandri
Grabe, Petrus Johannes
Journal Title
Journal ISSN
Volume Title
Publisher
South African Institution of Civil Engineering
Abstract
Deformation of the railway superstructure can be observed when loads are applied by passing trains. Deflections due to these loads can be measured using various measuring techniques, e.g. linear variable differential transducers (LVDTs), remote video monitoring (RVM) and multi-depth deflectometers (MDDs). Strain gauges are often used to measure the locomotive and wagon wheel loads on the track by calibrating the resulting strains in the bending rail, as measured by strain gauges installed on the flange of the rail. Strain gauges are relatively expensive and specimen preparation is time-consuming and requires some special skills. Figure 1 shows a typical strain gauge setup for wheel load measurement with a calibration frame positioned between two sleepers. Despite the disadvantage of using strain gauges, they are commonly used to determine strains experienced by a rail because of their accuracy.
Description
Keywords
Particle image velocimetry, Railway line, Linear variable differential transducer (LVDT), Remote video monitoring (RVM), Multi-depth deflectometer (MDD), Strain gauges
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Citation
Oosthuizen, E. & Grabe, H. 2018, 'Particle image velocimetry for strain measurement on a railway line', Civil Engineering, vol. 2018, no. 4, pp. 33-35.