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Countermeasures against railway ground and track vibrations
KTH, Superseded Departments, Vehicle Engineering.
2001 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Railway track and ground vibrations are considered, with anemphasis on methods of mitigation ("countermeasures"), forapplication to wayside disturbance problems.

Original field measurements from two sites in Sweden, aswell as borrowed measurements from Norway, provide vibrationresults at many points on the track, on and underneath theground surface, for a variety of trains, both with and withoutcountermeasures in-place.

Infinite periodic system theory is the basis of track-onlyand track-ground interaction models presented. The repeatingelement includes the sleeper, pad-fastener, rail, and either alocally-reacting ballast or a continuous ballast-soilwaveguide. The track-only model is even refined for nonlinearand high-frequency cases. The models are suitable for studyingcountermeasures in the track, or in the foundation(soil-stabilization). This latter countermeasure is shown to beeffective at low frequencies (of geotechnical interest), butsometimes counterproductive at audible frequencies (disturbanceproblems).

An analytical model for hard seismic screens is alsopresented, to complement the treatment of ground vibrationcountermeasures; this is based on physical approximations whichare favored by "high" (i.e, audible)frequencies and softsoils. Notably, experimentally observed resonant behavior isexplained.

Keywords:ground vibration, vibration screen, trackvibration, railway vibration

Place, publisher, year, edition, pages
Institutionen för farkostteknik , 2001. , v, 27 p.
Trita-FKT, 2001:143
Keyword [en]
ground vibration, vibration screen, track vibration, railway vibration, seismic barrier
URN: urn:nbn:se:kth:diva-3263ISBN: OAI: diva2:9046
Public defence
NR 20140805Available from: 2001-12-05 Created: 2001-12-05Bibliographically approved

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