To control the vibrations of the integral elevated station-viaduct structure induced by high-speed trains,a CRTS Ⅲ slab track with a vibration attenuation design was proposed.The vibration attenuation effects and the maximum vibrations of the station were predicted and analyzed by finite element simulations,wheel-drop tests,and field operation-al tests.The results show that the laying of the vibration attenuation tracks along the elevated stations of high-speed rail-way will not affect train operation safety.The trackpad stiffness of 0.03 N/mm3 can well balance the vibration attenuation and the dynamic response of the track.The vibration control effect of the vibration attenuation track is remarkable with a maximum frequency division insertion loss of 32.9 dB in wheel-drop tests,and a total insertion loss of 11.4 dB in field operational tests.After the use of the vibration attenuation track,the vibrations of the platform and waiting hall meet the requirements of the encouraging values with vibrations of the waiting hall on the elevated floor being 4 dB greater than the ground waiting hall.It is recommended to lay the vibration attenuation track in the elevated station section of the high-speed railway,especially in the case of trains passing through the station without stopping.
关键词
高速铁路/站桥一体/减振轨道/动力仿真/现场测试
Key words
high-speed railway/integral station-bridge/vibration attenuation track/dynamic simulation/field test
维普
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