Effect Analysis of Track Vibration Reduction Measures on Viaduct Environmental Vibration Induced by Vehicle Operation
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 12
Abstract
［Objective］ When a train running on the viaduct track, the rail vibration caused by the vehicle-track interaction will be transmitted to the bridge, piers, and pile foundations through the track structure, thereby triggering ground vibration around the bridge. Therefore, it is necessary to study the impact of elevated section rail and track bed vibration reduction on the environment for elevated rail transit. ［Method］ Based on the vehicle-track multi-body dynamics theory and the finite element method, a vehicle-track-U beam bridge-soil vibration model is established to solve the vibration response of the ground source intensity near the viaduct when rail transit veh-icles passing through. ［Result & Conclusion］ The peak frequency band of the ground source intensity vertical vibration frequency for elevated section is distributed in 40 ~ 60 Hz. Vibration-damping fasteners, trapezoidal sleepers, vibration-damping pad floating plates and steel spring floating plates all have a reduction effect on the ground source intensity vibration, and their contribution is mainly reflected in the vibration frequency range of 25 ~ 100 Hz. Under the conditions of using vibration-damping fasteners, trapezoidal sleepers, vibration-damping pad floating plates, and steel spring floating plates, when the vibration frequency is 40 ~ 50 Hz, the ground source intensity vibration acceleration levels are reduced by about 4.2 ~ 4.4 dB, 6.5 ~ 6.9 dB, 7.8 ~ 8.1 dB and 10.0~10.7 dB respectively. When the fastener stiffness is ≤15 kN/mm, the rail vertical displacement and vertical acceleration peak value increase significantly. When the fastener stiffness decreases from 60 kN/mm to 10 kN/mm, the rail vertical displacement and acceleration peak value increase by about 5 times and 18.26% respectively. In the peak frequency band of 40 ~ 50 Hz, the vertical vibration acceleration level at the ground source intensity decreases by about 4.5 ~ 4.9 dB.
Authors and Affiliations
Lin YANG, Bin FANG, Xiaoli NIU, Dehao YUAN
Keywords
Related Articles
- EP ID EP752718
- DOI 10.16037/j.1007-869x.2024.12.013
- Views 26
- Downloads 0
Architectural Design Concept of ′Confucian Elegance and Plain Expressions′ for Jinan Rail Transit Line 1
[Objective] The cultural attributes and architectural landscape of modern urban rail transit projects are gradually becoming a focal point of public attention. The architectural design in such projects carries significan...
Design and Deployment Plan of Elastic Cluster Cloud Platform Architecture for Metro Passenger Flow Analysis Scenarios
[Objective] In the rapidly evolving landscape of digital technology, cloud computing is widely utilized in various industries including metro systems. To ensure passenger travel safety and achieve real-time acquisition a...
Analysis of Patent Layout for Maglev Train Superconducting Magnet Technology
［Objective］ Superconducting magnet is the core of superconducting electric maglev trains, and countries such as Japan, Germany, and South Korea have conducted years of research and development in this area. To promote...
Anti-Fusing Measures for Urban Rail Transit Trains Stopping within the Catenary Insulated Overlap Section
[Objective] The contact wire fusing failures frequently occur when pantographs of urban rail transit trains stop within the insulated overlap section of the catenary system. To prevent such failures and improve the safe...
Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge
[Objective] The construction deformation control adjacent to operational railways is of utmost importance in current rail transit planning and construction. Therefore, it is necessary to study the effect of the diaphragm...