Experimental study on energy dissipation factors of wheelset node oscillations

Wheelsets directly subjected to a force impact under the interaction of wheels and rails are intense noisemakers when moving, including overhead cranes and railway rolling stock. Despite the design and functional differences, the calculation of vibroacoustic characteristics can be made from the unified positions. It should be noted that the calculation accuracy of the sound pressure levels and vibrations is in large part determined by the precision of setting the frequency-dependent loss factors of the vibration energy. Theoretical studies of this physical and mechanical value are rather complicated. Therefore, the regression curves obtained on the basis of the mathematical treatment of the experimental coefficient values of the wheelset assembly losses and the approximation dependencies by the exponential polynomials of various degrees should be used for the engineering analysis of the sound pressure levels and vibrations.