Reasonable Number of Low Stiffness Rail Pads at Rail Joint Locations
Based on the theory of vehicle-track coupling dynamics ,a vertical vehicle-track coupling dynamic model is established ,in which the track is considered as a 3-layer model with sleeper and ballast masses, and the rail is treated as a Timoshenko beam. To determine the optimal number of low stiffness rail pads at rail joint locations ,the dynamic effect of the number is investigated. During numerical simulations ,two typical positions of the rail welded joint and two forms of geometric irreg -ularity are taken into account. The results obtained show that, when the center of the rail joint is just above the sleeper ,to replace the three or five adjacent rail pads with low stiffness ones is acceptable to reduce the wheel/rail contact force and the ballast vibration ,and when at the mid-crib, four or six is sufficient.
Guijun TU Wanming ZHAI
Train and Track Research Institute , State Key Laboratory of Traction Power, Southwest Jiaotong University , Chengdu 610031, China
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
693-699
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）