轴重 40 t车辆车轮扁疤冲击振动特性研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

U213.4+2

基金项目:

国能集团科技创新项目(GJNY-20-231)


Wheel/rail impact induced by wheel flat of heavy-haul railway with 40 t axle load
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
  • |
  • 文章评论
    摘要:

    建立轴重 40 t 车辆?轨道动力学模型,采用变化车轮半径的方法模拟扁疤作用下的轮轨相互作用特征,分析轮轨冲击动力荷载特性。结果表明,车轮扁疤将激发出高频轮轨冲击荷载,高频区能量占主导。扁疤临界速度作用下轮轨冲击荷载达到峰值,扁疤越长,临界速度越高,扁疤长度为 10,20,30 和 40 mm 时临界速度分别为 30,50,70 和80 km/h,扁疤长度超过 50 mm 时,临界速度大于重载车辆最高运行速度 100 km/h。高频区的轮轨荷载主要存在于轮轨界面,不会引起钢轨变形,频率在 850 Hz 以下时轮轨动荷载才能有效传至轨下基础,根据轨枕设计极限荷载,建议车轮扁疤长度不应超过 40 mm。

    Abstract:

    The heavy-haul railway for 40 t axle load freight is one of key development aspects. It is the premise of heavy axle load technology to obtain wheel/rail interaction features based on the analysis of impact vibration. The train and track coupling dynamic model of freight with 40 t axle load is put forward. The wheel flat is simulated by varied wheel rolling radius. The results show that the wheel flat leads to severe wheel/rail force,and impact energy with high frequency region. The critical speed of wheel flat increases with the growth of wheel flat length. The critical speeds of wheel flat with length of 10,20,30 and 40 mm are respectively 30,50,70 and 80 km/h. The critical speed of wheel flat exceeds 100 km/h when wheel flat length is more than 50 mm. The wheel/rail force with higher frequency occurs on wheel/rail interface,and cannot cause the rail deformation adequately. The wheel/rail force in region of less than 850 Hz can be applied on the track,which should be paid attention during track component design.The suggestive critical length of the wheel flat should be less than 40 mm according to the sleeper design strength requirement.

    参考文献
    相似文献
    引证文献
引用本文

司道林,梁 晨,张良威,王树国,王 璞.轴重 40 t车辆车轮扁疤冲击振动特性研究[J].振动工程学报,2022,35(3):729~734.[SI Dao-lin, LIANG Chen, ZHANG Liang?wei, WANG Shu?guo, WANG Pu. Wheel/rail impact induced by wheel flat of heavy-haul railway with 40 t axle load[J]. Journal of Vibration Engineering,2022,35(3):729~734.]

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2022-07-19
  • 出版日期:
您是第位访问者
振动工程学报 ® 2024 版权所有
技术支持:北京勤云科技发展有限公司