The Research on the DEM Simulation of the Railway Ballast Tamping Process

Abstract:

Ballast degradation and unrecoverable deformation are emerged on the railway ballast track under the loads of high-speed and heavy loading locomotive. With the change of tamping frequency, a better understanding of the physics of compactness degree is important for long-time stability of ballast. This paper presented a numerical investigation of the bulk materials dynamics and the transient impaction of a system of irregular polyhedral particles confined with a rectangular box with a retaining wall subjected to cyclic tamping loading. Sphere packing method was being used in this study to simulate typical full-sized ballast particles. This paper aimed to establish firm-soft coupling particle-flow tamping operation simulation numerical model based on contact dynamics theory. This study checked the validity of the model while different tamping working conditions and out-loads was being implemented. The study shows that discrete element method (DEM) is an efficient method to reveal the rearrangement rule of railway ballast after the process of tamping operation.

• Periodical: Advanced Materials Research (Volumes 724-725)
• Pages: 1723-1726
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.724-725.1723
• Online since: August 2013
• Authors: Xue Jun Wang, Bin Hua, Bin Hu, Yi Lin Chi, Yan Fang Ding
• Keywords: Discrete Element Method (DEM), EDEM2.4., Numerical Simulation, Railway Ballast Track, Tamping Operation

References

[1] E.Azema etc. : submitted to EUROPEAN PHYSICAL JOURNAL E，2008（26）：327-335.

[2] Cundall, P.A., Strack, O.D.L.: A discrete element model for granular assemblies. Géotechnique 29(1), 47–65 (1979).

DOI: 10.1680/geot.1979.29.1.47

[3] McDowell, Glenn R.，Lim.Wee L.,Collop. Andrew C.,Armitage, Robert，Thom.Nicholas H. Laboratory simulation of train loading and tamping on ballast. Proceedings of the Institution of Civil Engineers: Transport, v 158, n 2, pp.89-95, March 2005.

DOI: 10.1680/tran.2005.158.2.89

[4] McDowell, G.R. Harireche, O.，Konietzky, H.,Brown, S.F. Thom, N.H. . Discrete element modelling of geogrid-reinforced aggregates. Geotechnical Engineering, v 159, n 1, pp.35-48, January (2006)

DOI: 10.1680/geng.2006.159.1.35

[5] Saussine, G.Compaction of Railway Ballast During Tamping Process: a Parametric Study. 6th International Conference on the Micromechanics of Granular Media，Golden CO ，JUL 13-17, 2009，469-472.

DOI: 10.1063/1.3179964

[6] E.Azema : submitted to Mechanics of Materials，2009（41）729-741.

[7] Information on http://www.dem-solutions.com/software/edem-software/

[8] Lu, M.,McDowell, G.R.. Discrete element modelling of railway ballast under monotonic and cyclic triaxial loading. Geotechnique, v 60, n 6, pp.459-467, June 2010.

DOI: 10.1680/geot.2010.60.6.459

[9] Xuejun Wang, Yilin Chi, Wei Li, Taoyong Zhou, Xingli Geng. The research of the numerical simulation on the granular ballast bed tamping. Advanced Materials Research. Vols. 479-481, in 2012, pp.1395-1398.

DOI: 10.4028/www.scientific.net/amr.479-481.1395

[10] Xuejun Wang, Yilin Chi, Fuyu Li, Qi Wang, Li Gao, Yongsheng Cao, Yongxin Peng, "Study on Discrete Element Modeling Simulation of the Railway Ballast Tamping", JDCTA: International Journal of Digital Content Technology and its Applications, Vol. 6, No. 23, p.660 ~ 668, (2012)

DOI: 10.4156/jdcta.vol6.issue23.76