Properties of damping couple at very high frequencies

0425473 - ÚT 2015 RIV CZ eng C - Conference Paper (international conference)
Půst, Ladislav - Pešek, Luděk - Košina, Jan - Radolfová, Alena
Properties of damping couple at very high frequencies.
Colloquim Dynamics of Machines 2014. Praha: Ústav termomechaniky AV ČR, v. v. i., 2014 - (Pešek, L.), s. 133-141. ISBN 978-80-87012-50-5.
[Colloquium Dynamics of Machines 2014. Praha (CZ), 04.02.2014-05.02.2014]
R&D Projects: GA ČR GA101/09/1166
Institutional support: RVO:61388998
Keywords : dry friction * damping * high frequencies
Subject RIV: BI - Acoustics

The contribution deals with the application of dry friction couples for noise and vibration damping at high frequency of several kHz what brings new problems connected with the small amplitudes of relative slipping motion of contact surfaces. The most important information from the of experimental results is knowledge that the value of evaluated friction coefficient can have different physical sense according to the magnitude of excitation force and to the frequency of applied vibrations. If amplitudes of motion are very small, then the external harmonic force produces only elastic micro-deformations of contacting bodies, where no slip occurs and then the traction contact force is proportional only to elastic deformation of the sample.
Permanent Link: http://hdl.handle.net/11104/0233227