DE analysis for mechanical characteristics of ballast bed with ballast mats

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (19) : 141-148.

CUI Xuhao, XIAO Hong

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Abstract

In order to analyze the effects of ballast mats on mechanical characteristics of railway ballast bed, the discrete element (DE) method and image processing technique were used to establish the computational model of ballast particles. An elastic bar was used to simulate a ballast mat, and the DE model of a ballast bed with ballast mats was built. The correctness of the model was verified with field test results. Dynamic responses of a conventional ballast bed and those of a ballast bed with ballast mats under action of train load were contrastively analyzed. Results showed that laying ballast mats can reduce the overall vibration level of ballast bed and reduce the average value of vibration acceleration of ballast particles by 9.40%. Laying ballast mats can reduce the number of strong keys in ballast bed, increase the occurrence probability of smaller contact forces in ballast bed, and reduce the average normal contact force of ballast particles by 21.7% and the average tangential force by 24.4%. Ballast mats can significantly increase the number of contact points between ballast particles and lower base, increase contact area, and reduce contact forces. Ballast mats are helpful to reduce the stiffness of ballast bed and increase the elasticity of ballast track.

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ballast mat / ballast bed / discrete element (DE) method / mechanical characteristics

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CUI Xuhao, XIAO Hong. DE analysis for mechanical characteristics of ballast bed with ballast mats[J]. Journal of Vibration and Shock, 2020, 39(19): 141-148

References

[1] Navaratnarajah S K, Indraratna B, Nimbalkar S. Application of Shock Mats in Rail Track Foundation Subjected to Dynamic Loads [J]. Procedia Engineering, 2016, 143:1108-1119.
[2] Indraratna B, Ngo N T, Rujikiatkamjorn C. Improved Performance of Ballasted Rail Tracks Using Plastics and Rubber Inclusions[J]. Procedia Engineering, 2017, 189:207-214.
[3] Mohammadzadeh S, Miri A, Nouri M. Enhancing the Structural Performance of Masonry Arch Bridges with Ballast Mats[J]. Journal of Performance of Constructed Facilities, 2017, 31(5): 04017089.
[4] Wettschureck R G, Heim M, Tecklenburg M. Long-term efficiency of ballast mats installed in the rapid transit railway tunnel near the Philharmonic Hall of Munich, Germany[J]. Rail Engineering International, 2002, 31:3-12.
[5] 郄录朝. 重载铁路用道砟垫试验研究[D]. 2016.
QIE Luchao. Test Research on Ballast Mat of Heavy Haul Railway[D]. 2016. (in Chinese)
[6] 练松良, 王继军, 杨文忠,等. 路桥过渡段轨道结构的动力性能试验研究[J]. 中国铁道科学, 2009, 30(4):19-24.
LIAN Songliang, WANG Jijun, YANG Wenzhong, et al. Test Study on the Dynamic Performance of the Track Structure at the Transition Section between Bridge and Plain Track [J].China Railway Science, 2009, 30(4):19-24. (in Chinese)
[7] Ferreira P A, López-Pita A. Numerical modelling of high speed train/track system for the reduction of vibration levels and maintenance needs of railway tracks[J]. Construction & Building Materials, 2015, 79:14-21.
[8] Costa P A, Calçada R, Cardoso A S. Ballast mats for the reduction of railway traffic vibrations. Numerical study[J]. Soil Dynamics & Earthquake Engineering, 2012, 42(4):137-150.
[9] 周宇, 许玉德, 周红青,等. 南京长江大桥有砟桥道床弹性改善的研究[J]. 铁道工程学报, 2009, 26(1):52-57.
ZHOU Yu, XU Yude, ZHOU Hongqing, et al. Research on Improving the Ballast Elasticity of the Track on Nanjing Yangtze River Bridge [J]. Journal of Railway Engineering Society, 2009, 26(1):52-57. (in Chinese)
[10] 谭诗宇, 蔡小培, 崔日新,等. 环境敏感区桥上有砟轨道铺设道砟垫的减振效果[J]. 振动与冲击, 2017, 36(10):38-44.
TAN Shiyu, CAI Xiaopei, CUI Rixin, et al. Vibration reduction effect of laying ballast mats under ballast tracks on bridge in environmental sensitive areas[J]. Journal of Vibration and Shock, 2017, 36(10):38-44. (in Chinese)
[11] 庞玲, 赵才友, 姚力, 等道砟垫隔振性能理论分析与试验研究[J]. 铁道工程学报, 2014, 31(3):56-60.
PANG Ling, ZNAO Caiyou, YAO Li, et al. Experiments and Research on the Vibration Isolation Performance of Ballast Mat[J]. Journal of Railway Engineering Society, 2014, 31(3):56-60. (in Chinese)
[12] 李培刚, 刘学毅, 郝远行. 涵洞地段道砟垫的减振特性[J]. 西南交通大学学报, 2012, 47(2):192-197.
LI Peigang, LIU Xueyi, HAO Yuanxing. Damping Characteristics of Ballast Mat on Culvert [J]. Journal of Southwest Jiaotong University, 2012, 47(2):192-197. (in Chinese)
[13]肖军华, 张德, 王延海,等. 基于DEM-FDM耦合的普通铁路碎石道床-土质基床界面接触应力分析[J]. 工程力学, 2018,35(09):170-179.
XIAO Junhua, ZHANG De, WANG Yanhai, et al. Study on interface stress between ballast and subgrade for traditional railway based on coupled DEM-FDM. [J]. Engineering Mechanics, 2018, 35(09): 170-179. (in Chinese)
[14] 高亮, 徐旸. 离散元-有限差分耦合法在铁路有砟道床研究中的应用[J]. 北京交通大学学报, 2016, 40(4):37-44.
GAO Liang, XU Yang. Application of coupled discrete element finite difference method in railway ballast bed research [J]. Journal of Beijing Jiaotong University, 2016, 40(4):37-44. (in Chinese)
[15] Itasca Consulting Group. Inc. PFC2D (Particle Flow Code in 2 Dimensions) Theory and Background [M]. Itasca Consulting Group, Minneapolis, Minnesota 55401 USA, 2002.
[16] TB/T 2140-2018,铁路碎石道砟[S].
TB/T 2140-2018, Railway ballast[S]. (in Chinese)
[17] 郑建. 增加有砟轨道弹性的措施及其对轨道力学性能影响[D]. 西南交通大学, 2017.
ZHENG Jian. The methods to increase the elasticity of ballast track and their inflence on the mechanical properties of ballast track[D]. Southwest Jiaotong University, 2017. (in Chinese)
[18] 狄宏规,冷伍明,薛继连,等.朔黄铁路重载扩能的路基强度评估[J].铁道学报,2014,36(08):84-90.
DI Honggui, LENG Wuming, XUE Jilian, et al. Assessment of Subgrade Strength for Transport Capacity Enlargement of Shuo‐Huang Heavy-haul Railway[J]. Journal of the China Railway Society,2014,36(08):84-90. (in Chinese)
[19] Liu C H, Nagel S R, Schecter D A, et al. Force fluctuations in bead packs.[J]. Science, 1995, 269(5223):513-515.
[20] 张科芬,张升,滕继东,盛岱超.离散元中破碎自组织对颗粒破碎影响研究[J].岩土工程学报,2018,40(04):743-751.
ZHANG Kefen, ZHANG Sheng, TENG Jidong, SHENG Daichao. The influence of self-organization of granular materials on particle crushing based on discrete element method[J]. Chinese Journal of Geotechnical Engineering, 2018,40(04):743-751. (in Chinese)