中国铁道科学2011，Vol.32Issue(6)：22-27,6.
轨面不平顺对高架支承块轨道结构振动特性影响试验研究
Experimental Study on the Influence of Rail Surface Irregularity on the Vibration Characteristics of Elevated Block-Supported Track
摘要
Abstract
In view of the influence of rail surface irregularity on the vibration characteristics of block-supported track in elevated system, field test was carried out and the vibration responses of track structure induced by different rail surface irregularities were comparatively analyzed in time and frequency domain respectively with emphasis on the vibration range of 10～l 000 Hz. The analysis results show that wheel/rail impact forces and vibration acceleration amplitude of track structure increase with the increment of rail surface irregularity amplitude, and are also influenced by the type of rail surface irregularity and wavelength distribution. The frequency of rail vibration caused by rail surface irregularity is mainly distributed within the range of 50～l 000 Hz. The vertical vibration frequency of rail support bed, bridge deck slab is distributed within the range of 40～200 Hz. The wavelength distribution of rail surface irregularity is one of the main factors influencing the distribution characteristics of track vibration frequency. A drop of 0. 2 mm in amplitude can diminish 14.1 dB in rail vertical vibration level for harmonic type of rail surface irregularity, and the rail surface irregularity spectrum is recommended as one of the track quality evaluation indicators.关键词
城市轨道交通/轨面不平顺/支承块轨道/振动加速度/1/3倍频程频谱Key words
Urban rail transit/Rail surface irregularity/Block-supported track/Vibration acceleration/1/3 octave spectrum分类
交通工程引用本文复制引用
韦红亮,练松良,周宇..轨面不平顺对高架支承块轨道结构振动特性影响试验研究[J].中国铁道科学,2011,32(6):22-27,6.基金项目
国家自然科学基金资助项目(50878158,50908179) （50878158,50908179）
铁路环境振动与噪声教育部工程研究中心开放基金资助项目 （）
高等学校博士学科点专项科研基金资助项目(200802471003) （200802471003）
