Study on the Analytical Model of Coupled Vehicle and Track with Variable Speeds
The train moves with variable speeds within more than half of the metro lines, since the intervals are always short in the unban rail transit system.Many in situ tests indicated that: the ex cessive vibration and noise in variable-speed section cannot be ignored either.However, few studies have been carried out on the vibration response of the track structure subjected to the moving train with variable speeds, but that with constant speed.In order to study the environmental vibration in duced by the entering-station and leaving-station trains, the frequency-domain analytical model of coupled vehicle and track with variable speeds was established.The whole vehicle system, the dis crete supported track structure, the track irregularity and the wheel-rail Hertz contact were all taken into account.The whole process was finished in the wave number-frequency domain, which provid ed great convenience for analyzing the high-frequency interaction of the vehicle and track.A com plete calculation program was established.Compared with the in situ tests, the analytical model and calculation program were both proved to be reasonable.Furthermore, the influence of different pa rameters, such as the fastener stiffness, the train acceleration and the train initial speed, on the vi bration acceleration of the track subjected to the moving train with variable speeds was also studied.
analytical model moving train track structure variable speeds vibration acceleration
K.F.Li W.N.Liu Z.W.Hart V.Markine
Beijing MTR Construction Administration Corporation, Beijing, China; School of Civil Engineering, Be School of Civil Engineering, Beijing Jiaotong University, Beijing, China Beijing MTR Construction Administration Corporation, Beijing, China Railway Engineering Group, Faculty of Civil Engineering and Geosciences, Delft University of Technol
国际会议
第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)
上海
英文
303-313
2013-11-08（万方平台首次上网日期，不代表论文的发表时间）