USING FAST VIBRATIONS TO QUENCH FRICTION-INDUCED OSCILLATIONS

✍ Scribed by J.J. THOMSEN

• Book ID: 102610069
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 317 KB
• Volume: 228
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1999.2460

✦ Synopsis

This work examines how friction-induced self-excited oscillations are a!ected by high-frequency external excitation. Simple analytical approximations are derived for predicting the occurrence of self-excited oscillations for the traditional mass-on-moving-belt model*with and without high-frequency excitation. It appears that high-frequency excitation can e!ectively cancel the negative slope in the friction}velocity relationship, and may thus present self-excited oscillations. To accomplish this, it is su$cient that the (non-dimensional) product of excitation amplitude and frequency exceeds the velocity corresponding to the minimum kinetic coe$cient of friction. Simple expressions are also given for predicting the excitation necessary for quenching self-excited oscillations at or below a speci"ed belt velocity. These and other results contribute to the general understanding of how friction properties may change under the action of fast vibrations.