噪声与振动控制Issue(3)：144-147,4.DOI:10.3969/j.issn.1006-1335.2014.03.031
CRTS III型板式无砟轨道桥梁段环境振动测试分析
Measurement and Analysis of Environmental Vibration in Railway Bridge Section of CRTS III Slab Ballastless Track
摘要
Abstract
To study the environmental vibration characteristics of CRTS III slab ballastless track, the ground vibration test is carried out in a bridge section of Cheng-Guan high-speed railway. The time-history characteristic and frequency spectrum feature of the ground vibration acceleration are analyzed at different measurement points. The one-third octave vibration and the decay of the Z vibration level are also analyzed. Results of measurement and analysis indicate that the ground vibration duration is about 6 seconds when train running at speed of 180 km/h. The peak acceleration at 10m distance from central line of the track is 60 mm/s2, and the vibration frequency spectrum there is distributed in the range of 20-90 Hz. Vibration of high frequency attenuates faster than low frequency vibration with the distance increasing. In the location with the distance from the central line of the track larger than 20 m, the vibration mainly consists of 15-45 Hz frequencies. Attenuation of the Z vibration level of the ground vibration can match the law of logarithmic decrement.关键词
振动与波/环境振动/III型板式无砟轨道/铁路桥梁/频谱Key words
vibration and wave/environmental vibration/CRTS III slab ballastless track/railway bridge/frequency spectrum分类
交通工程引用本文复制引用
张光明,贺玉龙,梅昌艮,杨立中..CRTS III型板式无砟轨道桥梁段环境振动测试分析[J].噪声与振动控制,2014,(3):144-147,4.基金项目
教育部新世纪优秀人才支持计划项目（NCET-11-0710）；国家自然科学基金项目（41272322）；中央高校基本科研业务费专项资金资助(SWJTU12CX003) （SWJTU12CX003）
