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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 53

Ballasted Track Maintenance with a Multi-Unit Tamping Machine: A Numerical Discrete Efficiency Comparison

C. Voivret1, R. Perales2 and G. Saussine1

1Innovation and Research, SNCF, Paris, France
2Matis technologies, Tour Norma, Puteaux, France

Full Bibliographic Reference for this paper
C. Voivret, R. Perales, G. Saussine, "Ballasted Track Maintenance with a Multi-Unit Tamping Machine: A Numerical Discrete Efficiency Comparison", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 53, 2014. doi:10.4203/ccp.104.53
Keywords: multi-group tamping, ballast, discrete simulation, contact dynamics.

Summary
By means of discrete numerical simulation using the contact dynamics method, the efficiency differences between different tamping configurations varying in terms of number of units is investigated. On the same portion of track composed of nine blocks and nearly 115000 grains of ballast (modelled as polyhedron), the track is numerically tamped using single, double, triple and quadruple unit tamping machines. Beyond the obvious gain in time provided by the use of multiple units, in this paper the focus is on the compaction and on the stress applied to the track components as a function of the number of units.

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