Numerical Simulation of High-Speed Train Induced Ground Vibration for Non-Ballasted Railway on Embankment

摘要：

　　A train-track coupled vertical dynamics model is employed to calculate the equivalent train load, which is applied onto the embankment surface of a two-dimensional (2D) embankment foundation finite-element-method (FEM) model to simulate ground vibration induced by high-speed train running over a non-ballasted railway.Numerical calculation of ground vibration at train speeds of 350 and 400 km/h is performed and compared with an in-situ test results.Results show that the vertical ground vibration acceleration induced by high-speed non-ballasted railway is predominant in the range of 30 to 50 Hz within the transverse distance of 50m from track centerline.Ground vibra tion accelerations decay fluctuantly with the transverse distance increasing.The time-domain peak values decay quickly at the location less than 20 m from track centerline, but at the location over 20 m the attenuations slow down and the values are less than 0, 1 m/s2.As to frequency-weighted verti cal acceleration levels, the attenuations begin to slow down at 30 m from track centerline.At the lo cation of 50 m the value is below 70 dB.The difference between the simulated and tested ground ac cderation levels is usually less than 5 dB.In conclusion, the 2D model in this paper shows a rational result in predicting ground vibration acceleration attenuation along transverse direction of the railway.

关键词： train-track coupled vertical dynamics model numerical simulation ground vibration accelerations

作者: M.H.Shao W.M.Zhai X.L.Song K.Wei

作者单位: Train and Track Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong Unive School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan Province, China

会议类型: 国际会议

会议名称: 第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)

会议地点: 上海

会议语种:英文

页码: 3-14

在线出版日期: 2013-11-08（万方平台首次上网日期，不代表论文的发表时间）