DOI: 10.11908/j.issn.0253-374x.2019.08.011

作者:

作者单位:


作者简介:


通讯作者:

中图分类号: U213.7


基金项目: 国家自然科学基金青年项目(51808556)中国铁路总公司科技研发计划（K2018G021；N2018G040；N2018G041）




Mechanical Properties of Polyurethane Ballast Bed Based on Discrete Element Method
Author:

Affiliation:


Fund Project:




摘要
| 图/表
| 访问统计
| 参考文献
|相似文献
| 引证文献
| 资源附件

摘要:提出了一种基于黏接力链单元的聚氨酯固化道床数值仿真分析方法，并在此基础上对聚氨酯固化道床与普通散体碎石道床在循环荷载作用下的力学性能进行了对比分析.结果表明，聚氨酯固化道床能够通过减小道床残余变形、改善道砟颗粒间接触状态的方式起到延缓道床累积沉降的目的；聚氨酯材料在延缓道床累积沉降的同时，也会导致轨枕的动位移增大.



Abstract:A discrete element method(DEM) model of polyurethane ballast bed based on bonding force chain unit was proposed in this paper, based on which, a comparative analysis between common ballast bed and polyurethane ballast bed under cyclic loading was conducted. The results show that polyurethane can lessen the ballasts bed cumulative settlement by reducing the residual deformation and improving the contact status of ballasts. Besides, polyurethane can also increase the dynamic displacement of the sleeper.





PDF全文下载地址:

点我下载PDF