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Structural Engineering and Mechanics Volume 38, Number 3, May10 2011 , pages 301-314 DOI: https://doi.org/10.12989/sem.2011.38.3.301 |
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Dynamics of a bridge beam under a stream of moving elements. Part 2 – Numerical simulations |
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M. Podworna
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| Abstract | ||
| The paper constitutes the second part of the author\'s study. The first part (Podworna 2010) formulates four fundamental tasks in dynamics of the bridge-track-train systems. The following cyclic moving loads are considered: a concentrated forces stream (model P), an unsprung masses stream (model M), a single-mass viscoelastic oscillators stream (model Mo) and a double-mass viscoelastic oscillators stream (model MMo). Three problems precluding to the numerical simulations have been developed, i.e., prediction of the forced resonances, the parameters of integration of equations of motion, the output results. A computer programme was written in Pascal and numerical research in the scope of the fundamental tasks was worked out. The investigations were focused on adequacy evaluation of the moving load models, P, M, Mo, MMo, in predicting dynamic processes in railway bridges. | ||
| Key Words | ||
| bridge-track-train system; fundamental tasks; bridge beam; moving elements streams; oneway contact; numerical simulations. | ||
| Address | ||
| M. Podworna: Institute of Civil Engineering, Wroclaw University of Technology, Wroclaw, Poland | ||