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

被引:1
|
作者
Wang, Xuejun [1 ]
Hua, Bin [1 ]
Hu, Bin [2 ]
Chi, Yilin [1 ]
Ding, Yanfang [1 ]
机构
[1] Kunming Univ Sci & Technol, Fac Mech & Elect Engn, 727 Jingming South Rd, Kunming 650500, Peoples R China
[2] China Railway Large Maintenance Machinery CO LTD, Kunming, Peoples R China
来源
APPLIED ENERGY TECHNOLOGY, PTS 1 AND 2 | 2013年 / 724-725卷
关键词
Discrete element method(DEM); Numerical simulation; EDEM2.4; Tamping operation; Railway ballast track;
D O I
10.4028/www.scientific.net/AMR.724-725.1723
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
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.
引用
收藏
页码:1723 / +
页数:2
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