Abstract
This paper presents the dynamic response of the Indian Railway track. Two track models are considered for the dynamic response in terms of vertical displacement and acceleration at different wheel speeds, keeping the moving point load at constant magnitude. The rail is treated as a beam either on viscoelastic foundation or on the discrete elastic support system. The governing equation is implemented in finite element analysis using ANSYS 14.0. For the validation of result from system equation are compared with those available in published literature and the maximum deviation for displacement at the midpoint of rail is found to be within 5 %. Different wheel speed generates variation in displacement and acceleration of the rail track. The study can be viewed as the foundation for the comparison of FEA based simulation of rail track to specify its dynamic response useful to provide better safety and comfort to commuters.
Highlights
The dynamic analysis of the railway track is a critical area of interest for many investigators around the world
This paper focuses on the comparison for track acceleration of two well known models in this area: Beam on viscoelastic foundation and discrete elastic support representing the system model
A supported beam on non-linear viscoelastic foundation subjected to a concentrated load moving with 36 km/h, is analyzed as per the properties of the UIC60 rail
Summary
The dynamic analysis of the railway track is a critical area of interest for many investigators around the world. Thambiratnam and Zhuge [10] developed finite element method for dynamic analysis of beam on elastic foundation subjected to moving point load. They proved that beam of span length L 10 m can accurately approximate as the ideal beam of infinite length. Hu D. et al [11] presented the convergence of the Galerkin method for the dynamic response of a Euler- Bernoulli beam resting on a non-linear viscoelastic foundation subjected to moving load. K., Professor Bridges, Indian Railways Institute of Civil Engineering, Pune, unpublished data) To address this aspect of research, finite element method with ANSYS as a tool is used for 2-D modeling of beam.
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