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Vibration Attenuation at Rail Joints through under Sleeper Pads

Journal Article


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Abstract


  • Modern railway tracks require electrification to power the trains and signaling systems to detect near real-time location of trains

    on railway networks. Such systems require the rail to carry and return the residual electricity back to substation, while enable

    signals to transfer within a track circuit. This track circuit requires rail jo

    ints to divide and insulate each loop of the circuit. Such

    the rail joints often generate impact transient dynamics to track systems. This paper presents the filed investigation into the

    vibration attenuation characteristic of under sleeper pads (USPs), which are the component installed under the concrete sleepers

    generally to improve railway track resilience. The field trial is aimed at mitigating rail joint impacts in a heavy haul track under

    mixed traffics. ‘Big Data’, obtained from both the track inspection vehicle and the sensors installed on tracks, demonstrate that

    track surface quality (top) of the section was improved after the trac

    k reconstruction. Fourier analysis results showed that the

    track surface (or vertical deviation) tends to deform at larger dis

    placement amplitude and resonates at a lower wavelength of

    track roughness. Interestingly, the operational pass-by vibration measurements show that the USPs has resulted in an increased

    v

    ibration of both rail and sleeper with USPs. Although the studies have found that the sleepers with USPs tend to have lesser

    flexures, the field data also confirms that a railway track with USPs could experience a large amplitude vibration, especially

    when excited by a high-frequency impact force. These dynamic behaviours imply that the use of soft to moderate USP could

    p

    otentially induce dilation of ballast whilst the use of hard USP may reduce sleeper-ballast friction. In the end, these could then

    w

    eaken lateral track stability over time.

UOW Authors


  •   Kaewunruen, Sakdirat (external author)
  •   Aikawa, Akira (external author)
  •   Alex M. Remennikov

Publication Date


  • 2017

Citation


  • Kaewunruen, S., Aikawa, A. & Remennikov, A. M. (2017). Vibration Attenuation at Rail Joints through under Sleeper Pads. Procedia Engineering, 189 193-198.

Scopus Eid


  • 2-s2.0-85020701744

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2510&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1508

Number Of Pages


  • 5

Start Page


  • 193

End Page


  • 198

Volume


  • 189

Place Of Publication


  • Netherlands

Abstract


  • Modern railway tracks require electrification to power the trains and signaling systems to detect near real-time location of trains

    on railway networks. Such systems require the rail to carry and return the residual electricity back to substation, while enable

    signals to transfer within a track circuit. This track circuit requires rail jo

    ints to divide and insulate each loop of the circuit. Such

    the rail joints often generate impact transient dynamics to track systems. This paper presents the filed investigation into the

    vibration attenuation characteristic of under sleeper pads (USPs), which are the component installed under the concrete sleepers

    generally to improve railway track resilience. The field trial is aimed at mitigating rail joint impacts in a heavy haul track under

    mixed traffics. ‘Big Data’, obtained from both the track inspection vehicle and the sensors installed on tracks, demonstrate that

    track surface quality (top) of the section was improved after the trac

    k reconstruction. Fourier analysis results showed that the

    track surface (or vertical deviation) tends to deform at larger dis

    placement amplitude and resonates at a lower wavelength of

    track roughness. Interestingly, the operational pass-by vibration measurements show that the USPs has resulted in an increased

    v

    ibration of both rail and sleeper with USPs. Although the studies have found that the sleepers with USPs tend to have lesser

    flexures, the field data also confirms that a railway track with USPs could experience a large amplitude vibration, especially

    when excited by a high-frequency impact force. These dynamic behaviours imply that the use of soft to moderate USP could

    p

    otentially induce dilation of ballast whilst the use of hard USP may reduce sleeper-ballast friction. In the end, these could then

    w

    eaken lateral track stability over time.

UOW Authors


  •   Kaewunruen, Sakdirat (external author)
  •   Aikawa, Akira (external author)
  •   Alex M. Remennikov

Publication Date


  • 2017

Citation


  • Kaewunruen, S., Aikawa, A. & Remennikov, A. M. (2017). Vibration Attenuation at Rail Joints through under Sleeper Pads. Procedia Engineering, 189 193-198.

Scopus Eid


  • 2-s2.0-85020701744

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2510&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1508

Number Of Pages


  • 5

Start Page


  • 193

End Page


  • 198

Volume


  • 189

Place Of Publication


  • Netherlands