Simulation and Application of Maintenance Mechanism of Ballast Blowing Car with DEM
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1 JOURNAL OF RAILWAY ENGINEERING SOCIETY Nov 2011 NO. 11 Ser U A Simulation and Application of Maintenance Mechanism of Ballast Blowing Car with DEM JING Guo - qing 1 GAO Liang 1 SHAO Lei 2 1. Beijing Jiaotong University Beijing China 2. Dalian University of Technology Dalian Liaoning China Abstract Research purposes The maintenance by the ballast blowing car needs to supply the small hard ballast under sleeper bottom to avoid tamping and breaking the ballast and eliminate the ballast memory effect. From the microscopic mechanics there is a little research on the maintenance mode of blowing ballast and on its applicable effect. In order to research the working principle and the maintenance effect of ballast blowing car from the microscopic mechanics the DEM was used to produce the ballast - sleeper 3D box model to simulate the ballast blowing. Ballast particles were made of real size irregular clumps to simulate the ballast interactions more precisely and the research was done on the mechanic effect of the roadbed under monotonic loading on the sleeper before and after the ballast blowing. Research conclusions The micro - mechanics simulation results showed that the contact force between sleeper and ballast could be reduced by blowing ballast and the ballast blowing had a little influence on the sleeper - ballast deformation. So the mechanics principle of the ballast blowing car operation was revealed quantitatively from the numerical value principle. Compared with tamping ballast the ballast blowing is high - efficient rapid low - cost and environment protected maintenance way. Key words irregular clump tamping discrete element method ballast blowing
2 mm HTT PBI pneumatic ballast injection ~ 20 mm mm 1 Anderson TB /T PFC3D Particle Flow Code 1 3D 5-7 5e8 N /m 5e8 N /m 5e8 N /m 5e8 N /m kg /m kg /m mm
3 e4 N 1 /4 0 1 F = A + Bcos 2πft + 1 A = e4N B = 2. 5e4N f = 1 Hz = kn N N 181 N 157 N - h 1 km 2-5 min mm m m /h 16 km / ~
4 McMichael % % 4 kg 7 McMichael 20 ~ 25 MGT % % 10% 50 kn N N 181 N 157 N 7 6
5 m /h m /h Zheng Lining Xie Qiang. Analysis of Failure Properties HTT of Expansive Soil Subgrade with Particle Flow Simulation J. Journal of Railway Engineering Society KEY A. J. Behaviour of Wwo Layer Railway Track Ballast under Cyclic and Monotonic Loading D. Sheffield U. K. University of Sheffield McDowell G. R. The Importance of Modelling Ballast Particle Shape in the Discrete Element Method J. Granular Matter F. FASTENRATH. Railroad Track Theory and Practice M. Frederick Publishing New York E. T. SELIG. Track Geotechnology and Substructure Management M. ISBN London C. ESVELD. Modern Railway Track M. MRT Productions Germany MCMICHAL P. L. The Economics of Stoneblowing for Maintenance of Way C / /International Heavy Haul Conference Vancouver. Canada Itasca Itasca Consulting Group. PFC3D CP. Minneapolis Minnesota J ANDERSON W. F. KEY A. J. Model Testing of Two - layer Railway Track Ballast J. Journal of Geotechnical and Geo - environmental Engineering TB /T S. TB /T Railway Ballast S. 11 FAIR P. AREMA The Behaviour of Two Layered Granular Materials in a Railway Environments D. Sheffield U. K. University of Sheffield MCMICHAL P. L. The Stoneblower - delivering the Promise R. TRB Annual Meeting D. HILL - Smith D. Improved Track Geometry Durability Using the Stoneblower C / /International Heavy Haul Conference Brisbane Australia E. TUTUMLUER. Aggregate Shape Effects on Ballast Tamping and Railroad Track Lateral Stability A. 檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨 J. J S Lv Xikui Yi Sirong. To Establish Three - dimensional Li Jun Fei Chuanyun. Overview of Study on Geo - Geological Environment Mould for Route Selection spatial Data Integration J. Progress in Geography RS GIS 7. J J Xie Tao He Zhengwei Huang Minqi etc. Application of Remote Sensing and GIS Technique in Survey of Geological Hazards in Reservoir J. Science of Surveying and Mapping M J Tang Guoan Liu Guonian. Principles and Methods to DEM and Earth Science Analysis M. Beijing Science Press Based on Remote Sensing Digitals J. Railway Standard Ddesign 2006 S Yao Yonghui Zhou Chenghu Sun Ranhao etc. Digital Mapping of Mountain Landforms Based on Multiple Source Data J. Journal of Moutain Scinece Ren Zhikun Tian Qinjian Chen Lize. Seismotectonic Interpretation Along Central Section of Chinese North - South Seismic Belt from ETM Image J. Eart hquake
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