噪声与振动控制2019，Vol.39Issue(5)：142-146,184,6.DOI:10.3969/j.issn.1006-1355.2019.05.027
客运专线高架轨道结构振动特性实测研究
Experimental Study on the Vibration Characteristics of Elevated Track Structures for Passenger Dedicated Lines
摘要
Abstract
The vibration characteristics of CRTS Ⅱ slab track on a bridge under track irregularity condition were tested. The wheel/rail impact forces and dynamic responses induced by different rail surface irregularities were comparatively analyzed both in time and frequency domains. The results show that under the random irregularity excitation, the vehicles on up-way and the vehicles on down-way will produce similar impact load on elevated-track structure. The rail vibration is mainly caused by wheel-rail surface irregularity. The high frequency vibration is mainly focused on the steel rail. Due to the damping effect of fasteners system, the high frequency vibration of the track slab and the bridge induced by wheel-rail surface irregularity becomes unobvious. While the medium frequency vibration induced by discrete supporting becomes dominant. Under the vehicle’s load, the vibration longitudinal transmission of the track structure is mainly completed in the steel rails.关键词
振动与波/轨道不平顺/现场试验/动力响应特性/时频域/振动传递特性Key words
vibration and wave/track irregularity/field test/dynamic response characteristics/time and frequent domains/vibration transmission分类
交通工程引用本文复制引用
房建,雷晓燕,练松良..客运专线高架轨道结构振动特性实测研究[J].噪声与振动控制,2019,39(5):142-146,184,6.基金项目
国家自然科学基金资助项目(51478184,51668019)江西省自然科学基金资助项目(20171BAB206057)江西省教育厅科研资助项目(GJJ180297) （51478184,51668019）
