摘要
对大型综合交通枢纽车站—南昌西站进行模型仿真,从时域和频域的角度分析地铁列车激励下南昌西站的振动特性。研究地铁2号线在不同行驶速度、不同隧道埋深工况下的振动传播规律及频率分布特点,并结合振动控制标准对环境振动进行评价。研究结果表明,在地铁列车荷载作用下,综合枢纽车站的振动幅值随着振源距离增大而减小;在距离轨道中心线20 m^40 m的区域出现振动放大区,振动放大效应对轨道层与楼板层的响应影响较大,对商业夹层的影响小,车站不同结构层的振动频率分布特性基本一致,主要集中在10 Hz^60 Hz范围内,但是随着高度的增大,结构层的高频成分衰减较快;车站结构横向振动水平总体上比垂向振动小,但两者处于同一量级,甚至在部分频率范围内比垂向振动大。
The vibration characteristics of Nanchang West Station under subway trains excitation are simulated and analyzed from the perspectives of time domain and frequency domain.The vibration propagation law and frequency distribution characteristics of subway line 2 under different speed and different tunnel burying depth are studied.The environmental vibration is evaluated according to the vibration control standard.The results show that under the load of the subway trains,the vibration amplitude of the integrated hub station decreases with the increase of the vibration source distance.In the area of 20 m-40 m from the centreline of the track,the vibration amplification region occurs.The vibration amplification effect has a relatively large influence on the floor layer,but has small influence on the commercial sandwich layer.The vibration frequency distribution characteristics of the different structural layers of the station are basically the same,and mainly concentrated in the range of 10 Hz-60 Hz.But,with the increase of the altitude of the layers,the high frequency components of the structural layers decrease rapidly.Generally,the lateral vibration response amplitude is about 0.8 time of the vertical one,and both are in the same level.But in some frequency range,the lateral vibration amplitude is even larger than the vertical one.
作者
崔聪聪
雷晓燕
张凌
张晗
CUI Congcong;LEI Xiaoyan;ZHANG Ling;ZHANG Han(Engineering Research Center of Railway Environment Virbration and Noise,Ministry of Education,East China Jiaotong University,Nanchang 330013,China;College of Metropolitan Transportation,Beijing University of Technology,Beijing 100124,China)
出处
《噪声与振动控制》
CSCD
2018年第2期120-126,共7页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51478184
51608202)
江西省教育厅资助项目(GJJ160522)
关键词
振动与波
地铁列车
综合交通枢纽车站
不同隧道埋深
不同行驶速度
振动水平评价
vibration and wave
subway train
integrated traffic hub station
different tunnel burying depth
different driving speed
vibration level evaluation
