Enhanced formula for a critical velocity of a uniformly moving load

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Abstract

The response of rails to moving loads is of interest in the area of high-speed railway transport. For determination of critical velocity of the train a theoretical concept that is based on the assumption that the track structure acts as a continuously supported beam (the rail) resting on a uniform layer of springs is traditionally used. In this contribution dynamic equilibrium of the soil in the vertical direction is implemented to obtain two frequency dependent parameters that are capable of handling geometric damping and of accounting for the soil mass inertia activated by induced vibrations. The new approach is tested on finite beams and single moving force. It allows for determination of resonant velocities. Then the quasi-stationary deflection shape of an infinite beam can be determined from two semiinfinite beams and critical velocities can be obtained from the nullity condition of the determinant of the dynamic stiffness matrix of the structure.
Original languageUnknown
Title of host publicationn/a
Pages10 pages
Publication statusPublished - 1 Jan 2012
EventEuropean Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012) -
Duration: 1 Jan 2012 → …

Conference

ConferenceEuropean Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)
Period1/01/12 → …

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