基于激光扫描法的铁路道砟级配对道床动力特性影响的离散元研究

徐旸1,2,高亮1,2,蔡小培1,2,侯博文1,2,赵云哲1,2

振动与冲击 ›› 2017, Vol. 36 ›› Issue (5) : 127-133.

PDF(1819 KB)
PDF(1819 KB)
振动与冲击 ›› 2017, Vol. 36 ›› Issue (5) : 127-133.
论文

基于激光扫描法的铁路道砟级配对道床动力特性影响的离散元研究

  • 徐旸1,2,高亮1,2,蔡小培1,2,侯博文1,2,赵云哲1,2
作者信息 +

Influences of ballast gradation on railway ballast bed dynamic characteristics based on Laser Scanning and Discrete Element Method

  • XU Yang1,2,GAO Liang1,2,CAI Xiaopei1,2,HOU Bowen1,2,ZHAO Yunzhe1,2
Author information +
文章历史 +

摘要

铁路碎石道床的道砟级配对道床的力学性能具有显著的影响,本文采用三维激光扫描技术对道砟颗粒的形状特征进行了获取及分析,并提出了基于道砟外形重建结果的离散元颗粒数值模型构造方法;在此基础上建立了循环荷载道砟箱数值模型。以此研究在高速及重载线路条件下,道砟级配对散体道床动力沉降特性的影响规律,并从细观角度分析了道床的沉降机理。研究结果表明:不同运营条件下铁路碎石道床的沉降机理有所不同。道砟颗粒间的相互错动是引发重载铁路道床沉降主要原因。而对于高速铁路,道床沉降还会受到高频荷载作用下颗粒自身转动的影响。因此,建议在规范中针对不同的线路条件提出不同的道砟级配曲线要求。

Abstract

Ballast gradation has obviously an influence on ballast bad’s dynamic performances.The three-dimensional laser scanning technique was used to capture and analyze shape features of ballasts bere.Based on the reconstructed results of ballast shape,a construction method of ballast discrete element model was proposed.Then,a ballast box numerical model with cyclic loading was established.The influence laws of ballast gradation on ballast bed dynamic settlement under high-speed and heavy-haul railway conditions were studied with the numerical model,the microscopic ballast bed settlement mechanism was analyzed as well.The results showed that the railway ballast bed has different degradation mechanisms under different operation conditions,the relative motion between ballasts is the main reason for the settlement of heavy-haul railway ballast bed;  for high-speed railway,the settlement of ballast bed is influenced by the rotation of ballast particles as well.Thus,it was suggested that different railway conditions should adopt different ballast gradation curves in the design code.
 

关键词

铁路有砟道床   / 道砟级配    / 离散元法   / 道床沉降   / 动力响应

Key words

railway ballast bed / ballast gradation / discrete element method / ballast bed degradation / dynamic response

引用本文

导出引用
徐旸1,2,高亮1,2,蔡小培1,2,侯博文1,2,赵云哲1,2. 基于激光扫描法的铁路道砟级配对道床动力特性影响的离散元研究[J]. 振动与冲击, 2017, 36(5): 127-133
XU Yang1,2,GAO Liang1,2,CAI Xiaopei1,2,HOU Bowen1,2,ZHAO Yunzhe1,2. Influences of ballast gradation on railway ballast bed dynamic characteristics based on Laser Scanning and Discrete Element Method[J]. Journal of Vibration and Shock, 2017, 36(5): 127-133

参考文献

[1].Anderson, W.F. and P. Fair, Behavior of railroad ballast under monotonic and cyclic loading. [J]. Journal of geotechnical and geoenvironmental engineering, 2008, 134(3): 316-327.
[2].胡仁伟, 王红, 赵国堂, 道碴动三轴试验研究 [J]. 中国铁道科学, 2001,22(2): 104-109.
HU Ren-wei, WANG Hong, ZHAO Guo-tang, Study on Dynamic Triaxial Test and Accumulated Deformation of ballast [J]. China Railway Science, 2001, 22(2): 104-109. (in Chinese)
[3].王红. 道碴弹性和累积变形的试验研究 [J]. 中国铁道科学, 2001, 22(6): 106-110.
WANG Hong. Test and study on ballast elasticity and accumulated deformation [J]. China Railway Science, 2001, 22(6): 106-110. (in Chinese)
[4]. Indraratna, B., et al., Behaviour of clay-fouled ballast under drained triaxial testing. GEOTECHNIQUE, 2013. 63(5): p. 410-419.
[5].Al-Saoudi, N.K.S. and K.H. Hassan, Behaviour of Track Ballast Under Repeated Loading. [J]. Geotechnical and Geological Engineering, 2014, 32(1): 167-178.
[6].Lim, W.L., Mechanics of railway ballast behaviour. [D] University of Nottingham: 2004, United Kingdom.
[7].Lim, W.L. and G.R. McDowell, Discrete element modelling of railway ballast. [J]. Granular Matter, 2005. 7(1): p. 19-29.
[8].Lu, M. and G.R. McDowell, The importance of modelling ballast particle shape in the discrete element method. [J]. Granular Matter, 2006. 9(1-2): p. 69-80.
[9].赵金凤,严颖,季顺迎.基于离散元模型的土石混合体直剪试验分析 [J]. 固体力学学报,2014,(02):124-134.
Jingfeng zhao, Ying Yan, Shunying Ji Analysis of direct shear test of soil-rock mixture based on discrete element model [J] Chinese Journal of Solid Mechanics,2014,(02):124-134.
[10].季顺迎,苏勇,严颖. 含沙铁路道碴弹性模量和沉降量的试验研究 [J]. 铁道科学与工程学报, 2011, 8(2): 47-52.
JI Shunying, SU Yong, YAN Ying. Experimental studies on elastic modulus and settlement of railway ballast with sand [J]. Journal of Railway Science and Engineering, 2011, 8(2): 47-52. (in Chinese)
[11].边学成,李公羽,李伟等, 基于颗粒真实几何形状的铁路道砟剪切过程三维离散元分析 [J]. 工程力学, 2015,32(05): 第64-75+83页.
Bian Xuecheng, Li Wei, Li Gongyu, Railway Ballast’s Shape Process Based on Particles’ Real Geometry [J]. Engineering Mechanics, 2015, 32(5): p. 64-75+83 (in Chinese)
[12].Huang, H., S. Shen and E. Tutumluer, Sandwich Model to Evaluate Railroad Asphalt Trackbed Performance Under Moving Loads. [J].Transportation Research Record: Journal of the Transportation Research Board, 2009. 2117(-1): p. 57-65.
[13].Huang, H., E. Tutumluer and W. Dombrow, Laboratory Characterization of Fouled Railroad Ballast Behavior. [J]. Transportation Research Record: Journal of the Transportation Research Board, 2009. 2117(-1): p. 93-101.
 [14].Indraratna, B., P.K. Thakur and J.S. Vinod, Experimental and numerical study of railway ballast behavior under cyclic loading. [J]. International Journal of Geomechanics, 2010. 10(4): p. 136 - 144.
[15]. 章志勇, 三维模型几何相似性比较的研究.[D]. 2005, 浙江大学
[16].Forbes, K., et al., Shape-from-silhouette with two mirrors and an uncalibrated camera. [C] In Proceedings of the 9th European Conference on Computer Vision (ECCV, 2006: p. 165-178.
[17]. Indraratna, B., et al., Behavior of Fresh and Fouled Railway Ballast Subjected to Direct Shear Testing: Discrete Element Simulation. International Journal of Geomechanics, 2014. 14(1): p. 34-44.
[18].徐旸,高亮,杨国涛等.道砟颗粒的精细化建模及对道床力学性能影响 [J]. 铁道学报,2014,36(09): 73-78.
XU Yang, GAO Liang, YANG Guo-tao, Fine Modelling of Ballast Grains and Influence on Mechanical Properties of Track Bed [J] Journal of the China Railway Society,2014,36(09): 73-78
[19].徐旸,高亮,井国庆,等. 脏污对道床剪切性能影响及评估指标的离散元分析 [J]. 工程力学, 2015, 32(8): 96-102.
XU Yang, GAO Liang, JING Guoqing, et al. Shear behavior analysis of fouled railroad ballast by DEM and its evaluation index [J]. Engineering Mechanics, 2015, 32(8): 96-102. (in Chinese)
[20].中华人民共和国铁道行业标准TB/T2140—2008铁路碎石道砟[S].北京:中国铁道出版社,2008
Railway industry standards of the People's Republic of China TB/T2140—2008 Railway ballast [S].Beijing  China Railway Publishing House,2008
[21].Indraratna, B.K.H.S., Ballast characteristics and the effects of geosynthetics on rail track deformation [C] Int Conference on Geosyntbetics and Geoenvironmental Engineering. 2004: Mumbai India. p. P3-12.

PDF(1819 KB)

Accesses

Citation

Detail

段落导航
相关文章

/