This study was conducted to investigate the dynamic response of a non-ballasted track-subgrade system under the high-speed train moving loads. On the assumption that the stress distribution is uniform under the bottom of the track plate, a complete finite element (FE) model was established for the roadbed-subgrade system with the FE analysis computer software ABAQUS. Using the FE model, numerical analyses were performed with focus on the variations of the system's vibration displacement, velocity, and acceleration under loading of a moving high-speed train. The dynamic responses under different moving speeds were analyzed and compared for a sinusoidal loading with a constant amplitude. The analysis results indicate that the system's dynamic responses increase nonlinearly as the moving speed increases with similar pattern. The findings of this study are useful to the design and construction of high-speed rail roadbeds.
Dynamic Response of High-Speed Rail Roadbed under Harmonic Moving Loads
Ninth Asia Pacific Transportation Development Conference ; 2012 ; Chongqing, China
Sustainable Transportation Systems ; 686-694
2012-06-28
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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