A Numerical Analysis of Ground Vibration Induced by Typical Rail Corrugation of Underground Subway

Abstract

A two-step approach is used to establish a numerical prediction model to study the impact of typical rail corrugation on ground vibration from an underground subway. In the first step, a vehicle-track-tunnel rigid-flexible coupling subsystem is established based on a lumped mass model dynamics and finite element analysis cosimulation method to simulate the generation of vibration. In the second step, a track-tunnel-soil three-dimensional (3D) finite element subsystem is built to simulate the propagation of the vibration. The ground vibration response is obtained by applying the wheel-rail force calculated from the first step. A section of Chengdu Metro Line 3 is studied, and the accuracy of the numerical prediction model is then verified by comparison with in-situ measurement. Based on that, the impact of corrugation on wheel-rail interaction and ground vibration is investigated by taking rail corrugation in typical subway sections and track geometry irregularities as system input excitation. In addition, to further analyze the sensitivity between different wavelength components in the rail corrugation samples and ground vibration, the measured rail corrugation is decomposed into five kinds with different wavelength components by filtering. The results show that the typical rail corrugation has a large impact on ground vibration response, which increases significantly in the range 8–16 Hz and 50–80 Hz, and the impact decreases with the distance from the vibration source. For typical subway rail corrugation with the significant wavelength of 125 mm and the secondary significant wavelength of 63 mm, the ground vibration response is sensitive to two wavelength components at 40–60 mm and 60–100 mm. Rail corrugation with the short wavelength of 60–100 mm significantly affects ground vibration levels.

The Dynamic Train–Track Interaction on a Bridge and in a Tunnel Compared with the Simultaneous Vehicle, Track and Ground Vibration Measurements on a Surface Line

“…Measurements of ground vibrations near railway tunnels have been reported in [23][24][25][26][27], where they have been used to verify numerical tunnel-soil models. In [28], some rules for the excitation of the ground vibrations have been derived from measurements at tunnel lines.…”

Field Measurement and Mechanism Analysis of Rail Corrugation on Steel Spring Floating Slab Track Section

“…SSFST, as an effective vibrationreduction track structure, better counters train-induced environmental vibration effects [17], but the problem of rail corrugation on SSFST sections is also becoming more prominent. There are some studies that have focused on field observations [18] and their impacts on the wheel-rail system [19]. However, there are less studies on the mechanism of rail corrugation on the SSFST section, as well as the influence on the wheelset-SSFST coupling system parameters on rail corrugation.…”

Prediction of building vibration induced by metro trains running in a curved tunnel

“…Hence, the train–track model can be simplified into a two-dimensional multibody model combined with a two-dimensional FE (Minsili et al, 2007), a two-and-a-half-dimensional FE (Lopes et al, 2014), or a three-dimensional FE (Ma et al, 2011). Recently, a three-dimensional train–track model combined with a three-dimensional tunnel–soil model has also been used (Xing et al, 2019; Yang et al, 2019). Nevertheless, all of the researchers cited above only considered the environmental vibration induced by trains running in a straight tunnel.…”