摘要
为了研究铁路高架车站不同区域的环境振动规律,针对某客运专线高架车站,分别在轨道梁跨中、办公间、候车厅布置了三向振动测点,测试了高速动车组以正线速度通过时高架车站内不同区域的环境振动水平,从振动加速度时程、振动加速度级、频谱三方面分析了试验数据;利用车-线-桥耦合振动理论,研究了轨道梁动力响应和列车走行性.研究结果表明:办公间的Z振级达80.7 dB,超出规范限值0.7 dB;高架车站环境振动以竖向为主;办公间竖向振动持时比水平振动长15%;候车厅楼板的横向振动比轨道梁振动持时长1.03 s;振动在由轨道梁向车站楼板传递的过程中,高频振动比低频衰减快.
In order to study the environmental vibration in different regions of elevated stations, measuring points for measuring the vibration in three directions （x,y,and z）were deployed to the mid-span of track beam,office,and waiting room of an elevated station in a passenger dedicated railway. When high-speed EMUs （electric multiple units）passed the elevated station at the main line speed,the environmental vibration in different regions of the station was tested,and experimental data on the time histories,levels,and frequency spectra of vibration accelerations were analyzed. According to the vehicle-track-bridge coupling theory,the dynamic response of the track beam and the running performance of trains were investigated. The results show that the Z-weighted vibration level of the office reaches 80. 7 dB,0. 7 dB higher than the code limit;and the vertical vibration dominates the environmental vibration of the elevated station. The duration of the vertical vibration at office center is 15% longer than that of the horizontal vibration;and the duration of the horizontal vibration of the waiting room is 1. 03 s longer than that of the track beam. In addition,the high-frequency vibration attenuates faster than the low-frequency vibration during the propagation from the track beam to the station floor.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2014年第4期612-618,共7页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(51378429
51308469)
新世纪优秀人才支持计划项目(NCET-10-0701)
国家863计划资助项目(2011AA11A103)
高等学校博士学科点专项科研基金资助项目(20110184110020)
关键词
高架车站
车桥耦合
环境振动
测试
振动加速度级
elevated station
vehicle-bridge coupling
environmental vibration
measurement
vibration acceleration level
