摘要
为研究隧道内排水沟设计方式对城市轨道交通环境振动的影响,建立中心水沟与双侧水沟隧道结构的落轴仿真试验模型及车辆-轨道-隧道耦合动力学模型,对比分析中心水沟与双侧水沟设计方式对轨道与隧道动力响应的影响差异,结果表明:双侧水沟可更好地抑制隧道结构振动及振动能量向环境的传递;采用双侧水沟设计使轨道板、衬砌、地面的垂向振动明显小于中心隧道结构,且对轨道与隧道结构低频段振动起到良好抑制作用;列车载荷作用下,双侧水沟在时频域的振动幅值均小于中心水沟,说明在不改变其他动力学参数的情况下,隧道结构可采用双侧水沟设计方案以获得更好的减振效果。
In order to study the influence of tunnel drainage ditch design on the environmental vibration of urban rail transit,an axis dropping simulation test model and a vehicle-track-tunnel coupling dynamic model of tunnel structures with middle ditch and bilateral ditch are established.The comparative analysis of the dynamic responses of the middle ditch and bilateral ditch to the track and the tunnel structure shows that the bilateral ditch can better suppress the track vibration and the downward transfer of vibration energy.The vertical vibrations of the track plate,tunnel lining and ground are significantly smaller than that of the central tunnel structure by using bilateral ditch design,and the vibrations of the track and tunnel structure in the low frequency band are well suppressed.Under the action of vehicle moving load,the vibration amplitude of bilateral ditch is less than that of the central ditch in time and frequency domain,which indicates that bilateral ditch can be adopted in the design of tunnel structure to obtain better vibration reduction effect without changing other dynamic parameters.
作者
王玉魁
和振兴
包能能
贠剑峰
WANG Yukui;HE Zhenxing;BAO Nengneng;YUN Jianfeng(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《铁道标准设计》
北大核心
2022年第5期124-130,共7页
Railway Standard Design
基金
国家自然科学基金项目(52062028)
牵引动力国家重点实验室开放课题(TPL1902)
甘肃省科技计划项目(20JR5RA393)。
关键词
隧道排水沟
环境振动
落轴试验
车辆-轨道-隧道耦合动力学
隔振
tunnel drainage ditch
environmental vibration
axle dropping test
vehicle track tunnel coupling dynamics
vibration reduction
