轨枕空吊动态演变规律
作者:
作者单位:

作者简介:

通讯作者:

基金项目:

国家自然科学基金(51805374),中央高校基本科研业务费专项资金(22120180531)


Dynamical Evolution Process of Voided Sleeper
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:

    在车辆轨道耦合系统动力学模型和道床沉降模型的基础上,提出了一种基于迭代计算的预测方法,对轨枕局部空吊后的动态演变过程进行了合理的预测.结果表明:当轨枕单侧轨底处出现局部空吊时,空吊区域的承载力明显降低,而与之相邻区域承受的车辆载荷增加,导致相邻区域轨枕空吊间隙发展较快,从而形成空吊区域由轨枕两端轨底处向轨枕中心扩展的动态演变过程;随着轨枕空吊区域的不断扩大,整根轨枕的承载力大幅降低,大部分列车载荷主要由相邻未出现空吊的轨枕承担,因而轨枕的空吊发展程度逐渐趋于平缓,最终大部分区域存在1.5 mm左右的空吊间隙.

    Abstract:

    In order to employ the dynamical evolution process of voided sleeper, an iterative computation method based on the vehicletrack coupled system dynamics model and subgrade settlement model is proposed in this paper. Simulation results indicate that when one end of the sleeper has an initial gap between the sleeper and subgrade, the sleepersubgrade contact force at this area decreases obviously. On the other hand, the sleepersubgrade contact force at the adjacent areas increases. Therefore, the sleeper voided area expands from one end to central part. Moreover, with the increased voided area the supporting capability of the sleeper deteriorates largely and most of the train loads are shared by the other sleepers. Due to this reason, the voided degree of the sleeper trends to be stable, and most areas have a gap about 1.5 mm.

    参考文献
    相似文献
    引证文献
引用本文

周和超,包泽宇,张树艺.轨枕空吊动态演变规律[J].同济大学学报(自然科学版),2019,47(04):0521~0527

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:2018-04-17
  • 最后修改日期:2019-02-19
  • 录用日期:2019-01-21
  • 在线发布日期: 2019-04-30