Open AccessExperimental study on energy dissipation factors of wheelset node oscillations
Author(s) -
В. А. Бондаренко,
Sergey F. Podust
Publication year - 2016
Publication title -
vestnik donskogo gosudarstvennogo tehničeskogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 1992-6006
pISSN - 1992-5980
DOI - 10.12737/18274
Subject(s) - vibration , dissipation , exponential function , structural engineering , basis (linear algebra) , energy (signal processing) , acoustics , mechanics , physics , engineering , mathematics , mathematical analysis , geometry , quantum mechanics , thermodynamics
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.