高速列车交会振动对邻近建筑内精密仪器的影响及减振措施研究
Vibration impact and reduction measures of high-speed trains meeting on precision instruments in adjacent buildings
王雨琪 1蔡小培 1臧传臻 2王启好 1汤雪扬1
作者信息
- 1. School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China
- 2. China Railway Design Corporation,Tianjin 300308,China
- 折叠
摘要
随着城际铁路的大力建设,铁路沿线特别是一些放置精密仪器的建筑因振动环境恶化,内部仪器受到反复振动的影响,且当列车高速会车时,引起的振动更为剧烈.本文对邻近线路建筑物内的精密仪器进行数值仿真分析,建立了高速列车会车的耦合模型,提出一种振动叠加的预测方法.对既有振动数据进行采集,用于模型验证.在此基础上,对精密仪器的振动进行评估并提出相应的减振措施.结果表明,既有振动主频在10～20 Hz,在该频段存在振动超限风险;列车高速会车会导致精密仪器无法正常工作.加装减振垫可以有效缓解列车引起的高频振动(40～80 Hz)影响.列车振动与既有振动叠加后,高层振动以10～20 Hz为主,建议在精密仪器处采取减振措施.
Abstract
With the vigorous construction of intercity railways,the environmental vibrations along the railways,especially in buildings with precision instruments(PI),have been deteriorating,and the internal instruments are affected by repeated vibrations.The train-induced vibrations will be more severe when two trains meet at a high speed.In this study,numerical simulation analysis of PI in adjacent buildings was carried out.A coupling model of high-speed trains meeting was developed,and a method for predicting vibration superposition was proposed.The existing vibration data were collected and used for model verification.Based on this,the vibrations of PI were evaluated,and corresponding measures were proposed.The prediction results show that the dominant frequency of the existing vibrations is 10-20 Hz,and there is a risk of excessive vibrations in this frequency range.PI can be affected by high-speed trains meeting,resulting in abnormal operation.The high-frequency train-induced vibrations(40-80 Hz)are effectively alleviated by the damping pad.After the superposition of train-induced vibrations and existing vibrations,the vibrations on higher floors are mainly in the 10-20 Hz range,which requires attention and implementation of reduction measures for PI.
关键词
城际铁路/列车交会/振动预测/精密仪器/减振轨道Key words
intercity railway/trains meeting/vibration prediction/precision instruments/damping track引用本文复制引用
基金项目
Fundamental Research Funds for the Central Universities,China(2018JBZ003)
National Natural Science Foundation of China(52178405)
Open Fund of National Key Laboratory of Highspeed Railway Track Technology,China(2021YJ053)
出版年
2023
NETL
NSTL
维普
万方数据