Numerical Simulation of Dynamic Response of Viaduct Rail Transit

Urban mass transit rail track vibration attenuation research becomes more and more important. Different type rail track vibration attenuation methods have to been research. According to current size of urban mass transit rail viaduct, two track dynamic finite element model, elastic fasteners system and floating slab, were built in Ansys software with rail viaduct finite element. In order to identify their capacity of attenuating wheel-rail impact, field test rail vertical force was applied on the rail element in the finite element, and dynamic responses of different places in the two rail track finite element are compared. The result certifies that the floating slab can attenuate low and medium frequency vibration component of viaduct distinctly, reducing noise produced by vibration of viaduct, and it is a better vibration attenuation method.