Parameters of the oscillatory process of the sleeper base in the area of the rail joint when using elastic spacers

The article presents the results of field tests of under-rail pads in order to assess the effect of stiffness and the number of standard and experimental pads-shock absorbers on the amplitude-frequency characteristic of vibrations that occur in the ballast layer in the rail joint zone when the rolling stock is moving. To achieve this goal, we measured the vertical vibration accelerations arising during the passage of trains in the area of the rail joint with a different number of standard under-rail shock absorbers TsP-204-M-ARS (standard) and Getzner Sylodyn NF shock absorber pads with increased elasticity (experimental). On the basis of the obtained values, the amplitude-frequency characteristic of the oscillatory process was determined by means of the Fourier transform. The main (carrier) frequencies, at which the maximum amplitudes of vibration accelerations are recorded, are determined, first of all, not by the material of the damper pad, but by the magnitude of the force effect. The use of experimental shock absorber pads allows to reduce and redistribute the vibration energy transmitted to the ballast layer.

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