The influence of the track parameters on vibration characteristics of elastic supporting block ballastless track

Abstract

Abstract: A nonlinear coupling model of wheel and rail was established according to the mechanical characteristic of elastic supporting block ballastless track and the actual parameters of metro vehicle. The time-variant vertical acceleration of the rail and the sleepers can be calculated from the model, and the frequency dependence acceleration was verified by the Fast Fourier Transform algorithm. A vibration level fixed by human sensitivity was introduced to quantify the vibration energy of the rail and sleepers. The impact of the parameters in the model was evaluated. The results provide certain guidance to vibration reduction of the tunnel during the design and construction.

Key words: ballastless track, vibration reduction, wheel-rail couple model, vibration power, modal method

References

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