Dynamic Characteristics of Train-ballastless Track under the Conditions of Differential Settlement of Subgrade
Based on Coupling Dynamics Theory ,the dynamic analysis model of vehicle -ballastless track-subgrade is built ,and the differential settlement of subgrade of high -speed railway is inputted as irregularity with analyzing the relationship among settlement deformation , train and the dynamic response of track system. The calculation results show that tendency of the vertical acceleration of vehicle body increasing with the increase of settlement is obvious , and the settlement also leads to the substantial increase of vertical wheel rail force , wheel unloading rate and the vertical vibration acceleration of rail, but the settlement affects a little to wheel rail lateral force as well as derailment coefficient. Differential settlement of subgrade directly affects the safety of high -speed train operation and passenger comfort, so it should be strictly controlled.
Xiaopei CAI
School of Civil Engineering ,Beijing Jiaotong University ,Beijing 100044,China MOE Key Laboratory of High-speed Railway Engineering ,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
647-652
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）