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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Measurement and analysis of vibration and acoustic emissions of a railway wheel under defined dynamic excitations
 Pešek, Luděk ; Prasad, Chandra Shekhar ; Šnábl, Pavel
The paper deals with experimental vibro-acoustics of railway wheel. The methodology for evaluation of effect of vibrational plate dampers was elaborated. The four variants of the wheel was measured and analyse to achieve the optimal solution of the dampers.
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Contribution to Experimental Research of Vibro-Acoustics of Railway wheels with add-on Dampers
 Pešek, Luděk ; Vaněk, František ; Veselý, Jan ; Cibulka, Jan ; Boháč, T.
In the contribution a method of measurement and dynamic analysis of the recent operational tests of the monobloc wheel with/without damping elements is presented. On the basis of time-frequency analysis of operational vibration and experimental modal analysis of the wheel its dynamic behavior is described. The vibro-acoustic coupling is analyzed from the comparisons of vibration and sound pressure spectrograms. At passing the curve, the formation and modal-frequency composition of squealing noise is observed and there are identified vibrational modes that mostly contribute to noise emission into surrounding. For quantitative comparison of individual wheel solutions the third octave analysis is used.
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