College of Civil Engineering, Tongji University, Shanghai, China.
College of Civil Engineering, Tongji University, Shanghai, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
Sci Total Environ. 2016 Oct 15;568:1295-1307. doi: 10.1016/j.scitotenv.2016.01.212. Epub 2016 Feb 13.
Maglev, offers competitive journey-times compared to the railway and subway systems in markets for which distance between the stations is 100-1600km owing to its high acceleration and speed; however, such systems may have excessive vibration. Field measurements of Maglev train-induced vibrations were therefore performed on the world's first commercial Maglev line in Shanghai, China. Seven test sections along the line were selected according to the operating conditions, covering speeds from 150 to 430km/h. Acceleration responses of bridge pier and nearby ground were measured in three directions and analyzed in both the time and frequency domain. The effects of Maglev train speed on vibrations of the bridge pier and ground were studied in terms of their peak accelerations. Attenuation of ground vibration was investigated up to 30m from the track centerline. Effects of guideway configuration were also analyzed based on the measurements through two different test sections with same train speed of 300km/h. The results showed that peak accelerations exhibited a strong correlation with both train speed and distance off the track. Guideway configuration had a significant effect on transverse vibration, but a weak impact on vertical and longitudinal vibrations of both bridge pier and ground. Statistics indicated that, contrary to the commonly accepted theory and experience, vertical vibration is not always dominant: transverse and longitudinal vibrations should also be considered, particularly near turns in the track. Moreover, measurements of ground vibration induced by traditional high-speed railway train were carried out with the same testing devices in Bengbu in the Anhui Province. Results showed that the Maglev train generates significantly different vibration signatures as compared to the traditional high-speed train. The results obtained from this paper can provide good insights on the impact of Maglev system on the urban environment and the quality of human life nearby.
磁悬浮技术由于其高加速度和速度，相比铁路和地铁系统在车站间距为 100-1600km 的市场中具有竞争优势；然而，这种系统可能会产生过大的振动。因此，对中国上海世界上第一条商业磁悬浮线进行了磁悬浮列车引起的振动现场测量。根据运行条件，沿线选择了七个测试段，覆盖了 150-430km/h 的速度。在三个方向上测量了桥墩和附近地面的加速度响应，并在时域和频域进行了分析。研究了磁悬浮列车速度对桥墩和地面振动的影响，以峰值加速度为指标。研究了从轨道中心线到 30m 范围内的地面振动衰减。根据两个具有相同 300km/h 列车速度的不同测试段的测量结果，还分析了导轨配置的影响。结果表明，峰值加速度与列车速度和距轨道的距离都有很强的相关性。导轨配置对横向振动有显著影响，但对桥墩和地面的竖向和纵向振动影响较弱。统计结果表明，与普遍接受的理论和经验相反，竖向振动并不总是占主导地位：横向和纵向振动也应考虑，特别是在轨道转弯处附近。此外，在安徽省蚌埠市使用相同的测试设备进行了传统高速列车引起的地面振动测量。结果表明，与传统高速列车相比，磁悬浮列车产生的振动特征明显不同。本文的研究结果可为磁悬浮系统对城市环境和附近人类生活质量的影响提供很好的见解。
